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1. Atmospheric new particle formation from the CERN CLOUD experiment

Author

Kirkby, Jasper, Amorim, António, Baltensperger, Urs, Carslaw, Kenneth S., Christoudias, Theodoros, Curtius, Joachim, Donahue, Neil M., Haddad, Imad El, Flagan, Richard C., Gordon, Hamish, Hansel, Armin, Harder, Hartwig, Junninen, Heikki, Kulmala, Markku, Kürten, Andreas, Laaksonen, Ari, Lehtipalo, Katrianne, Lelieveld, Jos, Möhler, Ottmar, Riipinen, Ilona, Stratmann, Frank, Tomé, Antonio, Virtanen, Annele, Volkamer, Rainer, Winkler, Paul M., and Worsnop, Douglas R.

Published
2023
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2. Better integration of chemical pollution research will further our understanding of biodiversity loss

Author

Sylvester, Francisco, Weichert, Fabian G., Lozano, Verónica L., Groh, Ksenia J., Bálint, Miklós, Baumann, Lisa, Bässler, Claus, Brack, Werner, Brandl, Barbara, Curtius, Joachim, Dierkes, Paul, Döll, Petra, Ebersberger, Ingo, Fragkostefanakis, Sotirios, Helfrich, Eric J. N., Hickler, Thomas, Johann, Sarah, Jourdan, Jonas, Klimpel, Sven, Kminek, Helge, Liquin, Florencia, Möllendorf, Darrel, Mueller, Thomas, Oehlmann, Jörg, Ottermanns, Richard, Pauls, Steffen U., Piepenbring, Meike, Pfefferle, Jakob, Schenk, Gerrit Jasper, Scheepens, J. F., Scheringer, Martin, Schiwy, Sabrina, Schlottmann, Antje, Schneider, Flurina, Schulte, Lisa M., Schulze-Sylvester, Maria, Stelzer, Ernst, Strobl, Frederic, Sundermann, Andrea, Tockner, Klement, Tröger, Tobias, Vilcinskas, Andreas, Völker, Carolin, Winkelmann, Ricarda, and Hollert, Henner

Published
2023
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3. The gas-phase formation mechanism of iodic acid as an atmospheric aerosol source

Author

Finkenzeller, Henning, Iyer, Siddharth, He, Xu-Cheng, Simon, Mario, Koenig, Theodore K., Lee, Christopher F., Valiev, Rashid, Hofbauer, Victoria, Amorim, Antonio, Baalbaki, Rima, Baccarini, Andrea, Beck, Lisa, Bell, David M., Caudillo, Lucía, Chen, Dexian, Chiu, Randall, Chu, Biwu, Dada, Lubna, Duplissy, Jonathan, Heinritzi, Martin, Kemppainen, Deniz, Kim, Changhyuk, Krechmer, Jordan, Kürten, Andreas, Kvashnin, Alexandr, Lamkaddam, Houssni, Lee, Chuan Ping, Lehtipalo, Katrianne, Li, Zijun, Makhmutov, Vladimir, Manninen, Hanna E., Marie, Guillaume, Marten, Ruby, Mauldin, Roy L., Mentler, Bernhard, Müller, Tatjana, Petäjä, Tuukka, Philippov, Maxim, Ranjithkumar, Ananth, Rörup, Birte, Shen, Jiali, Stolzenburg, Dominik, Tauber, Christian, Tham, Yee Jun, Tomé, António, Vazquez-Pufleau, Miguel, Wagner, Andrea C., Wang, Dongyu S., Wang, Mingyi, Wang, Yonghong, Weber, Stefan K., Nie, Wei, Wu, Yusheng, Xiao, Mao, Ye, Qing, Zauner-Wieczorek, Marcel, Hansel, Armin, Baltensperger, Urs, Brioude, Jérome, Curtius, Joachim, Donahue, Neil M., Haddad, Imad El, Flagan, Richard C., Kulmala, Markku, Kirkby, Jasper, Sipilä, Mikko, Worsnop, Douglas R., Kurten, Theo, Rissanen, Matti, and Volkamer, Rainer

Published
2023
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4. Synergistic HNO3–H2SO4–NH3 upper tropospheric particle formation

Author

Wang, Mingyi, Xiao, Mao, Bertozzi, Barbara, Marie, Guillaume, Rörup, Birte, Schulze, Benjamin, Bardakov, Roman, He, Xu-Cheng, Shen, Jiali, Scholz, Wiebke, Marten, Ruby, Dada, Lubna, Baalbaki, Rima, Lopez, Brandon, Lamkaddam, Houssni, Manninen, Hanna E., Amorim, António, Ataei, Farnoush, Bogert, Pia, Brasseur, Zoé, Caudillo, Lucía, De Menezes, Louis-Philippe, Duplissy, Jonathan, Ekman, Annica M. L., Finkenzeller, Henning, Carracedo, Loïc Gonzalez, Granzin, Manuel, Guida, Roberto, Heinritzi, Martin, Hofbauer, Victoria, Höhler, Kristina, Korhonen, Kimmo, Krechmer, Jordan E., Kürten, Andreas, Lehtipalo, Katrianne, Mahfouz, Naser G. A., Makhmutov, Vladimir, Massabò, Dario, Mathot, Serge, Mauldin, Roy L., Mentler, Bernhard, Müller, Tatjana, Onnela, Antti, Petäjä, Tuukka, Philippov, Maxim, Piedehierro, Ana A., Pozzer, Andrea, Ranjithkumar, Ananth, Schervish, Meredith, Schobesberger, Siegfried, Simon, Mario, Stozhkov, Yuri, Tomé, António, Umo, Nsikanabasi Silas, Vogel, Franziska, Wagner, Robert, Wang, Dongyu S., Weber, Stefan K., Welti, André, Wu, Yusheng, Zauner-Wieczorek, Marcel, Sipilä, Mikko, Winkler, Paul M., Hansel, Armin, Baltensperger, Urs, Kulmala, Markku, Flagan, Richard C., Curtius, Joachim, Riipinen, Ilona, Gordon, Hamish, Lelieveld, Jos, El-Haddad, Imad, Volkamer, Rainer, Worsnop, Douglas R., Christoudias, Theodoros, Kirkby, Jasper, Möhler, Ottmar, and Donahue, Neil M.

Published
2022
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6. Ammonium CI-Orbitrap: a tool for characterizing the reactivity of oxygenated organic molecules.

Author

Li, Dandan, Wang, Dongyu, Caudillo, Lucia, Scholz, Wiebke, Wang, Mingyi, Tomaz, Sophie, Marie, Guillaume, Surdu, Mihnea, Eccli, Elias, Gong, Xianda, Gonzalez-Carracedo, Loic, Granzin, Manuel, Pfeifer, Joschka, Rörup, Birte, Schulze, Benjamin, Rantala, Pekka, Perrier, Sébastien, Hansel, Armin, Curtius, Joachim, and Kirkby, Jasper

Subjects
MASS spectrometry, TIME-of-flight mass spectrometers, MASS spectrometers, ATMOSPHERIC ionization, ATMOSPHERIC aerosols, CHEMICAL ionization mass spectrometry
Abstract

Oxygenated organic molecules (OOMs) play an important role in the formation of atmospheric aerosols. Due to various analytical challenges with respect to measuring organic vapors, uncertainties remain regarding the formation and fate of OOMs. The chemical ionization Orbitrap (CI-Orbitrap) mass spectrometer has recently been shown to be a powerful technique that is able to accurately identify gaseous organic compounds due to its greater mass resolution. Here, we present the ammonium-ion-based CI-Orbitrap (NH4+ -Orbitrap) as a technique capable of measuring a wide range of gaseous OOMs. The performance of the NH4+ -Orbitrap is compared with that of state-of-the-art mass spectrometers, including a nitrate-ion-based chemical ionization atmospheric pressure interface coupled to a time-of-flight mass spectrometer (NO3- -LTOF), a new generation of proton transfer reaction-TOF mass spectrometer (PTR3-TOF), and an iodide-based CI-TOF mass spectrometer equipped with a Filter Inlet for Gases and AEROsols (I- -CIMS). The instruments were deployed simultaneously in the Cosmic Leaving OUtdoors Droplets (CLOUD) chamber at the European Organization for Nuclear Research (CERN) during the CLOUD14 campaign in 2019. Products generated from α -pinene ozonolysis under various experimental conditions were simultaneously measured by the mass spectrometers. The NH4+ -Orbitrap was able to identify the widest range of OOMs (i.e., O ≥ 2), from less-oxidized species to highly oxygenated organic molecules (HOMs). Excellent agreement was found between the NH4+ -Orbitrap and the NO3- -LTOF with respect to characterizing HOMs and with the PTR3-TOF for the less-oxidized monomeric species. OOM concentrations measured by NH4+ -Orbitrap were estimated using calibration factors derived from the OOMs with high time-series correlations during the side-by-side measurements. As with the other mass spectrometry techniques used during this campaign, the detection sensitivity of the NH4+ -Orbitrap to OOMs is greatly affected by relative humidity, which may be related to changes in ionization efficiency and/or multiphase chemistry. Overall, this study shows that NH4+ -ion-based chemistry associated with the high mass resolution of the Orbitrap mass analyzer can measure almost all inclusive compounds. As a result, it is now possible to cover the entire range of compounds, which can lead to a better understanding of the oxidation processes. [ABSTRACT FROM AUTHOR]

Published
2024
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7. Rapid growth of organic aerosol nanoparticles over a wide tropospheric temperature range

Author

Stolzenburg, Dominik, Fischer, Lukas, Vogel, Alexander L, Heinritzi, Martin, Schervish, Meredith, Simon, Mario, Wagner, Andrea C, Dada, Lubna, Ahonen, Lauri R, Amorim, Antonio, Baccarini, Andrea, Bauer, Paulus S, Baumgartner, Bernhard, Bergen, Anton, Bianchi, Federico, Breitenlechner, Martin, Brilke, Sophia, Mazon, Stephany Buenrostro, Chen, Dexian, Dias, António, Draper, Danielle C, Duplissy, Jonathan, Haddad, Imad El, Finkenzeller, Henning, Frege, Carla, Fuchs, Claudia, Garmash, Olga, Gordon, Hamish, He, Xucheng, Helm, Johanna, Hofbauer, Victoria, Hoyle, Christopher R, Kim, Changhyuk, Kirkby, Jasper, Kontkanen, Jenni, Kürten, Andreas, Lampilahti, Janne, Lawler, Michael, Lehtipalo, Katrianne, Leiminger, Markus, Mai, Huajun, Mathot, Serge, Mentler, Bernhard, Molteni, Ugo, Nie, Wei, Nieminen, Tuomo, Nowak, John B, Ojdanic, Andrea, Onnela, Antti, Passananti, Monica, Petäjä, Tuukka, Quéléver, Lauriane LJ, Rissanen, Matti P, Sarnela, Nina, Schallhart, Simon, Tauber, Christian, Tomé, António, Wagner, Robert, Wang, Mingyi, Weitz, Lena, Wimmer, Daniela, Xiao, Mao, Yan, Chao, Ye, Penglin, Zha, Qiaozhi, Baltensperger, Urs, Curtius, Joachim, Dommen, Josef, Flagan, Richard C, Kulmala, Markku, Smith, James N, Worsnop, Douglas R, Hansel, Armin, Donahue, Neil M, and Winkler, Paul M

Subjects
aerosols, nanoparticle growth, aerosol formation, CLOUD experiment, volatile organic compounds
Abstract

Nucleation and growth of aerosol particles from atmospheric vapors constitutes a major source of global cloud condensation nuclei (CCN). The fraction of newly formed particles that reaches CCN sizes is highly sensitive to particle growth rates, especially for particle sizes

Published
2018

8. Hydroxyl Radicals and Oxidation Capacity in the Tropical Troposphere: Measurements from CAFE Field Campaigns using HORUS

Author

Holzbeck, Philip, primary, Rohloff, Roland, additional, Sreekumar, Sreedev, additional, Monteiro, Carolina, additional, Tsokankunku, Anywhere, additional, Marno, Daniel, additional, Martinez, Monica, additional, Nussbaumer, Clara, additional, Dienhart, Dirk, additional, Tripathi, Nidhi, additional, Wang, Nijing, additional, Edtbauer, Achim, additional, Bohn, Birger, additional, Obersteiner, Florian, additional, Williams, Jonathan, additional, Fischer, Horst, additional, Curtius, Joachim, additional, Pöhlker, Mira, additional, Lelieveld, Jos, additional, and Harder, Hartwig, additional

Published
2024
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9. Neutral molecular cluster formation of sulfuric acid dimethylamine observed in real time under atmospheric conditions

Author

Kürten, Andreas, Jokinen, Tuija, Simon, Mario, Sipilä, Mikko, Sarnela, Nina, Junninen, Heikki, Adamov, Alexey, Almeida, João, Amorim, Antonio, Bianchi, Federico, Breitenlechner, Martin, Dommen, Josef, Donahue, Neil M., Duplissy, Jonathan, Ehrharta, Sebastian, Flagan, Richard C., Franchin, Alessandro, Hakala, Jani, Hansel, Armin, Heinritzia, Martin, Hutterli, Manuel, Kangasluoma, Juha, Kirkby, Jasper, Laaksonen, Ari, Lehtipalo, Katrianne, Leiminger, Markus, Makhmutov, Vladimir, Mathot, Serge, Onnela, Antti, Petäjä, Tuukka, Praplan, Arnaud P., Riccobono, Francesco, Rissanen, Matti P., Rondo, Linda, Schobesberger, Siegfried, Seinfeld, John H., Steiner, Gerhard, Tomé, António, Tröstl, Jasmin, Winkler, Paul M., Williamson, Christina, Wimmer, Daniela, Ye, Penglin, Baltensperger, Urs, Carslaw, Kenneth S., Kulmala, Markku, Worsnop, Douglas R., and Curtius, Joachim

Subjects
Physics - Atmospheric and Oceanic Physics, Physics - Chemical Physics
Abstract

For atmospheric sulfuric acid (SA) concentrations the presence of dimethylamine (DMA) at mixing ratios of several parts per trillion by volume can explain observed boundary layer new particle formation rates. However, the concentration and molecular composition of the neutral (uncharged) clusters have not been reported so far due to the lack of suitable instrumentation. Here we report on experiments from the Cosmics Leaving Outdoor Droplets chamber at the European Organization for Nuclear Research revealing the formation of neutral particles containing up to 14 SA and 16 DMA molecules, corresponding to a mobility diameter of about 2 nm, under atmospherically relevant conditions. These measurements bridge the gap between the molecular and particle perspectives of nucleation, revealing the fundamental processes involved in particle formation and growth. The neutral clusters are found to form at or close to the kinetic limit where particle formation is limited only by the collision rate of SA molecules. Even though the neutral particles are stable against evaporation from the SA dimer onward, the formation rates of particles at 1.7-nm size, which contain about 10 SA molecules, are up to 4 orders of magnitude smaller comparedwith those of the dimer due to coagulation and wall loss of particles before they reach 1.7 nm in diameter. This demonstrates that neither the atmospheric particle formation rate nor its dependence on SA can simply be interpreted in terms of cluster evaporation or the molecular composition of a critical nucleus., Comment: Main text plus SI

Published
2015
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10. Nitrate Radicals Suppress Biogenic New Particle Formation from Monoterpene Oxidation

Author

Li, Dandan, primary, Huang, Wei, additional, Wang, Dongyu, additional, Wang, Mingyi, additional, Thornton, Joel A., additional, Caudillo, Lucía, additional, Rörup, Birte, additional, Marten, Ruby, additional, Scholz, Wiebke, additional, Finkenzeller, Henning, additional, Marie, Guillaume, additional, Baltensperger, Urs, additional, Bell, David M., additional, Brasseur, Zoé, additional, Curtius, Joachim, additional, Dada, Lubna, additional, Duplissy, Jonathan, additional, Gong, Xianda, additional, Hansel, Armin, additional, He, Xu-Cheng, additional, Hofbauer, Victoria, additional, Junninen, Heikki, additional, Krechmer, Jordan E., additional, Kürten, Andreas, additional, Lamkaddam, Houssni, additional, Lehtipalo, Katrianne, additional, Lopez, Brandon, additional, Ma, Yingge, additional, Mahfouz, Naser G. A., additional, Manninen, Hanna E., additional, Mentler, Bernhard, additional, Perrier, Sebastien, additional, Petäjä, Tuukka, additional, Pfeifer, Joschka, additional, Philippov, Maxim, additional, Schervish, Meredith, additional, Schobesberger, Siegfried, additional, Shen, Jiali, additional, Surdu, Mihnea, additional, Tomaz, Sophie, additional, Volkamer, Rainer, additional, Wang, Xinke, additional, Weber, Stefan K., additional, Welti, André, additional, Worsnop, Douglas R., additional, Wu, Yusheng, additional, Yan, Chao, additional, Zauner-Wieczorek, Marcel, additional, Kulmala, Markku, additional, Kirkby, Jasper, additional, Donahue, Neil M., additional, George, Christian, additional, El-Haddad, Imad, additional, Bianchi, Federico, additional, and Riva, Matthieu, additional

Published
2024
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11. Assessing the importance of nitric acid and ammonia for particle growth in the polluted boundary layer

Author

Marten, Ruby, primary, Xiao, Mao, additional, Wang, Mingyi, additional, Kong, Weimeng, additional, He, Xu-Cheng, additional, Stolzenburg, Dominik, additional, Pfeifer, Joschka, additional, Marie, Guillaume, additional, Wang, Dongyu S., additional, Elser, Miriam, additional, Baccarini, Andrea, additional, Lee, Chuan Ping, additional, Amorim, Antonio, additional, Baalbaki, Rima, additional, Bell, David M., additional, Bertozzi, Barbara, additional, Caudillo, Lucía, additional, Dada, Lubna, additional, Duplissy, Jonathan, additional, Finkenzeller, Henning, additional, Heinritzi, Martin, additional, Lampimäki, Markus, additional, Lehtipalo, Katrianne, additional, Manninen, Hanna E., additional, Mentler, Bernhard, additional, Onnela, Antti, additional, Petäjä, Tuukka, additional, Philippov, Maxim, additional, Rörup, Birte, additional, Scholz, Wiebke, additional, Shen, Jiali, additional, Tham, Yee Jun, additional, Tomé, António, additional, Wagner, Andrea C., additional, Weber, Stefan K., additional, Zauner-Wieczorek, Marcel, additional, Curtius, Joachim, additional, Kulmala, Markku, additional, Volkamer, Rainer, additional, Worsnop, Douglas R., additional, Dommen, Josef, additional, Flagan, Richard C., additional, Kirkby, Jasper, additional, McPherson Donahue, Neil, additional, Lamkaddam, Houssni, additional, Baltensperger, Urs, additional, and El Haddad, Imad, additional

Published
2024
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12. The role of low-volatility organic compounds in initial particle growth in the atmosphere

Author

Tröstl, Jasmin, Chuang, Wayne K, Gordon, Hamish, Heinritzi, Martin, Yan, Chao, Molteni, Ugo, Ahlm, Lars, Frege, Carla, Bianchi, Federico, Wagner, Robert, Simon, Mario, Lehtipalo, Katrianne, Williamson, Christina, Craven, Jill S, Duplissy, Jonathan, Adamov, Alexey, Almeida, Joao, Bernhammer, Anne-Kathrin, Breitenlechner, Martin, Brilke, Sophia, Dias, Antònio, Ehrhart, Sebastian, Flagan, Richard C, Franchin, Alessandro, Fuchs, Claudia, Guida, Roberto, Gysel, Martin, Hansel, Armin, Hoyle, Christopher R, Jokinen, Tuija, Junninen, Heikki, Kangasluoma, Juha, Keskinen, Helmi, Kim, Jaeseok, Krapf, Manuel, Kürten, Andreas, Laaksonen, Ari, Lawler, Michael, Leiminger, Markus, Mathot, Serge, Möhler, Ottmar, Nieminen, Tuomo, Onnela, Antti, Petäjä, Tuukka, Piel, Felix M, Miettinen, Pasi, Rissanen, Matti P, Rondo, Linda, Sarnela, Nina, Schobesberger, Siegfried, Sengupta, Kamalika, Sipilä, Mikko, Smith, James N, Steiner, Gerhard, Tomè, Antònio, Virtanen, Annele, Wagner, Andrea C, Weingartner, Ernest, Wimmer, Daniela, Winkler, Paul M, Ye, Penglin, Carslaw, Kenneth S, Curtius, Joachim, Dommen, Josef, Kirkby, Jasper, Kulmala, Markku, Riipinen, Ilona, Worsnop, Douglas R, Donahue, Neil M, and Baltensperger, Urs

Subjects
General Science & Technology
Abstract

About half of present-day cloud condensation nuclei originate from atmospheric nucleation, frequently appearing as a burst of new particles near midday. Atmospheric observations show that the growth rate of new particles often accelerates when the diameter of the particles is between one and ten nanometres. In this critical size range, new particles are most likely to be lost by coagulation with pre-existing particles, thereby failing to form new cloud condensation nuclei that are typically 50 to 100 nanometres across. Sulfuric acid vapour is often involved in nucleation but is too scarce to explain most subsequent growth, leaving organic vapours as the most plausible alternative, at least in the planetary boundary layer. Although recent studies predict that low-volatility organic vapours contribute during initial growth, direct evidence has been lacking. The accelerating growth may result from increased photolytic production of condensable organic species in the afternoon, and the presence of a possible Kelvin (curvature) effect, which inhibits organic vapour condensation on the smallest particles (the nano-Köhler theory), has so far remained ambiguous. Here we present experiments performed in a large chamber under atmospheric conditions that investigate the role of organic vapours in the initial growth of nucleated organic particles in the absence of inorganic acids and bases such as sulfuric acid or ammonia and amines, respectively. Using data from the same set of experiments, it has been shown that organic vapours alone can drive nucleation. We focus on the growth of nucleated particles and find that the organic vapours that drive initial growth have extremely low volatilities (saturation concentration less than 10(-4.5) micrograms per cubic metre). As the particles increase in size and the Kelvin barrier falls, subsequent growth is primarily due to more abundant organic vapours of slightly higher volatility (saturation concentrations of 10(-4.5) to 10(-0.5) micrograms per cubic metre). We present a particle growth model that quantitatively reproduces our measurements. Furthermore, we implement a parameterization of the first steps of growth in a global aerosol model and find that concentrations of atmospheric cloud concentration nuclei can change substantially in response, that is, by up to 50 per cent in comparison with previously assumed growth rate parameterizations.

Published
2016

13. The effect of acid-base clustering and ions on the growth of atmospheric nano-particles.

Author

Lehtipalo, Katrianne, Rondo, Linda, Kontkanen, Jenni, Schobesberger, Siegfried, Jokinen, Tuija, Sarnela, Nina, Kürten, Andreas, Ehrhart, Sebastian, Franchin, Alessandro, Nieminen, Tuomo, Riccobono, Francesco, Sipilä, Mikko, Yli-Juuti, Taina, Duplissy, Jonathan, Adamov, Alexey, Ahlm, Lars, Almeida, João, Amorim, Antonio, Bianchi, Federico, Breitenlechner, Martin, Dommen, Josef, Downard, Andrew J, Dunne, Eimear M, Flagan, Richard C, Guida, Roberto, Hakala, Jani, Hansel, Armin, Jud, Werner, Kangasluoma, Juha, Kerminen, Veli-Matti, Keskinen, Helmi, Kim, Jaeseok, Kirkby, Jasper, Kupc, Agnieszka, Kupiainen-Määttä, Oona, Laaksonen, Ari, Lawler, Michael J, Leiminger, Markus, Mathot, Serge, Olenius, Tinja, Ortega, Ismael K, Onnela, Antti, Petäjä, Tuukka, Praplan, Arnaud, Rissanen, Matti P, Ruuskanen, Taina, Santos, Filipe D, Schallhart, Simon, Schnitzhofer, Ralf, Simon, Mario, Smith, James N, Tröstl, Jasmin, Tsagkogeorgas, Georgios, Tomé, António, Vaattovaara, Petri, Vehkamäki, Hanna, Vrtala, Aron E, Wagner, Paul E, Williamson, Christina, Wimmer, Daniela, Winkler, Paul M, Virtanen, Annele, Donahue, Neil M, Carslaw, Kenneth S, Baltensperger, Urs, Riipinen, Ilona, Curtius, Joachim, Worsnop, Douglas R, and Kulmala, Markku

Abstract

The growth of freshly formed aerosol particles can be the bottleneck in their survival to cloud condensation nuclei. It is therefore crucial to understand how particles grow in the atmosphere. Insufficient experimental data has impeded a profound understanding of nano-particle growth under atmospheric conditions. Here we study nano-particle growth in the CLOUD (Cosmics Leaving OUtdoors Droplets) chamber, starting from the formation of molecular clusters. We present measured growth rates at sub-3 nm sizes with different atmospherically relevant concentrations of sulphuric acid, water, ammonia and dimethylamine. We find that atmospheric ions and small acid-base clusters, which are not generally accounted for in the measurement of sulphuric acid vapour, can participate in the growth process, leading to enhanced growth rates. The availability of compounds capable of stabilizing sulphuric acid clusters governs the magnitude of these effects and thus the exact growth mechanism. We bring these observations into a coherent framework and discuss their significance in the atmosphere.

Published
2016

14. Rapid growth of new atmospheric particles by nitric acid and ammonia condensation

Author

Wang, Mingyi, Kong, Weimeng, Marten, Ruby, He, Xu-Cheng, Chen, Dexian, Pfeifer, Joschka, Heitto, Arto, Kontkanen, Jenni, Dada, Lubna, Kürten, Andreas, Yli-Juuti, Taina, Manninen, Hanna E., Amanatidis, Stavros, Amorim, António, Baalbaki, Rima, Baccarini, Andrea, Bell, David M., Bertozzi, Barbara, Bräkling, Steffen, Brilke, Sophia, Murillo, Lucía Caudillo, Chiu, Randall, Chu, Biwu, De Menezes, Louis-Philippe, Duplissy, Jonathan, Finkenzeller, Henning, Carracedo, Loic Gonzalez, Granzin, Manuel, Guida, Roberto, Hansel, Armin, Hofbauer, Victoria, Krechmer, Jordan, Lehtipalo, Katrianne, Lamkaddam, Houssni, Lampimäki, Markus, Lee, Chuan Ping, Makhmutov, Vladimir, Marie, Guillaume, Mathot, Serge, Mauldin, Roy L., Mentler, Bernhard, Müller, Tatjana, Onnela, Antti, Partoll, Eva, Petäjä, Tuukka, Philippov, Maxim, Pospisilova, Veronika, Ranjithkumar, Ananth, Rissanen, Matti, Rörup, Birte, Scholz, Wiebke, Shen, Jiali, Simon, Mario, Sipilä, Mikko, Steiner, Gerhard, Stolzenburg, Dominik, Tham, Yee Jun, Tomé, António, Wagner, Andrea C., Wang, Dongyu S., Wang, Yonghong, Weber, Stefan K., Winkler, Paul M., Wlasits, Peter J., Wu, Yusheng, Xiao, Mao, Ye, Qing, Zauner-Wieczorek, Marcel, Zhou, Xueqin, Volkamer, Rainer, Riipinen, Ilona, Dommen, Josef, Curtius, Joachim, Baltensperger, Urs, Kulmala, Markku, Worsnop, Douglas R., Kirkby, Jasper, Seinfeld, John H., El-Haddad, Imad, Flagan, Richard C., and Donahue, Neil M.

Published
2020
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15. Role of sesquiterpenes in biogenic new particle formation

Author

Dada, Lubna, primary, Stolzenburg, Dominik, additional, Simon, Mario, additional, Fischer, Lukas, additional, Heinritzi, Martin, additional, Wang, Mingyi, additional, Xiao, Mao, additional, Vogel, Alexander L., additional, Ahonen, Lauri, additional, Amorim, Antonio, additional, Baalbaki, Rima, additional, Baccarini, Andrea, additional, Baltensperger, Urs, additional, Bianchi, Federico, additional, Daellenbach, Kaspar R., additional, DeVivo, Jenna, additional, Dias, Antonio, additional, Dommen, Josef, additional, Duplissy, Jonathan, additional, Finkenzeller, Henning, additional, Hansel, Armin, additional, He, Xu-Cheng, additional, Hofbauer, Victoria, additional, Hoyle, Christopher R., additional, Kangasluoma, Juha, additional, Kim, Changhyuk, additional, Kürten, Andreas, additional, Kvashnin, Aleksander, additional, Mauldin, Roy, additional, Makhmutov, Vladimir, additional, Marten, Ruby, additional, Mentler, Bernhard, additional, Nie, Wei, additional, Petäjä, Tuukka, additional, Quéléver, Lauriane L. J., additional, Saathoff, Harald, additional, Tauber, Christian, additional, Tome, Antonio, additional, Molteni, Ugo, additional, Volkamer, Rainer, additional, Wagner, Robert, additional, Wagner, Andrea C., additional, Wimmer, Daniela, additional, Winkler, Paul M., additional, Yan, Chao, additional, Zha, Qiaozhi, additional, Rissanen, Matti, additional, Gordon, Hamish, additional, Curtius, Joachim, additional, Worsnop, Douglas R., additional, Lehtipalo, Katrianne, additional, Donahue, Neil M., additional, Kirkby, Jasper, additional, El Haddad, Imad, additional, and Kulmala, Markku, additional

Published
2023
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16. Ammonium CI-Orbitrap: a tool for characterizing the reactivity of oxygenated organic molecules

Author

Li, Dandan, primary, Wang, Dongyu, additional, Caudillo, Lucia, additional, Scholz, Wiebke, additional, Wang, Mingyi, additional, Tomaz, Sophie, additional, Marie, Guillaume, additional, Surdu, Mihnea, additional, Eccli, Elias, additional, Gong, Xianda, additional, Gonzalez-Carracedo, Loic, additional, Granzin, Manuel, additional, Pfeifer, Joschka, additional, Rörup, Birte, additional, Schulze, Benjamin, additional, Rantala, Pekka, additional, Perrier, Sébastien, additional, Hansel, Armin, additional, Curtius, Joachim, additional, Kirkby, Jasper, additional, Donahue, Neil M., additional, George, Christian, additional, El-Haddad, Imad, additional, and Riva, Matthieu, additional

Published
2023
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17. Supplementary material to "Ammonium CI-Orbitrap: a tool for characterizing the reactivity of oxygenated organic molecules"

Author

Li, Dandan, primary, Wang, Dongyu, additional, Caudillo, Lucia, additional, Scholz, Wiebke, additional, Wang, Mingyi, additional, Tomaz, Sophie, additional, Marie, Guillaume, additional, Surdu, Mihnea, additional, Eccli, Elias, additional, Gong, Xianda, additional, Gonzalez-Carracedo, Loic, additional, Granzin, Manuel, additional, Pfeifer, Joschka, additional, Rörup, Birte, additional, Schulze, Benjamin, additional, Rantala, Pekka, additional, Perrier, Sébastien, additional, Hansel, Armin, additional, Curtius, Joachim, additional, Kirkby, Jasper, additional, Donahue, Neil M., additional, George, Christian, additional, El-Haddad, Imad, additional, and Riva, Matthieu, additional

Published
2023
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18. ML-CIRRUS : THE AIRBORNE EXPERIMENT ON NATURAL CIRRUS AND CONTRAIL CIRRUS WITH THE HIGH-ALTITUDE LONG-RANGE RESEARCH AIRCRAFT HALO

Author

Voigt, Christiane, Schumann, Ulrich, Minikin, Andreas, Abdelmonem, Ahmed, Afchine, Armin, Borrmann, Stephan, Boettcher, Maxi, Buchholz, Bernhard, Bugliaro, Luca, Costa, Anja, Curtius, Joachim, Dollner, Maximilian, Dörnbrack, Andreas, Dreiling, Volker, Ebert, Volker, Ehrlich, Andre, Fix, Andreas, Forster, Linda, Frank, Fabian, Fütterer, Daniel, Giez, Andreas, Graf, Kaspar, Grooß, Jens-Uwe, Groß, Silke, Heimerl, Katharina, Heinold, Bernd, Hüneke, Tilman, Järvinen, Emma, Jurkat, Tina, Kaufmann, Stefan, Kenntner, Mareike, Klingebiel, Marcus, Klimach, Thomas, Kohl, Rebecca, Krämer, Martina, Krisna, Trismono Candra, Luebke, Anna, Mayer, Bernhard, Mertes, Stephan, Molleker, Sergej, Petzold, Andreas, Pfeilsticker, Klaus, Port, Max, Rapp, Markus, Reutter, Philipp, Rolf, Christian, Rose, Diana, Sauer, Daniel, Schäfler, Andreas, Schlage, Romy, Schnaiter, Martin, Schneider, Johannes, Spelten, Nicole, Spichtinger, Peter, Stock, Paul, Walser, Adrian, Weigel, Ralf, Weinzierl, Bernadett, Wendisch, Manfred, Werner, Frank, Wernli, Heini, Wirth, Martin, Zahn, Andreas, Ziereis, Helmut, and Zöger, Martin

Published
2017

19. An intercomparison study of four different techniques for measuring the chemical composition of nanoparticles

Author

Caudillo, Lucía, primary, Surdu, Mihnea, additional, Lopez, Brandon, additional, Wang, Mingyi, additional, Thoma, Markus, additional, Bräkling, Steffen, additional, Buchholz, Angela, additional, Simon, Mario, additional, Wagner, Andrea C., additional, Müller, Tatjana, additional, Granzin, Manuel, additional, Heinritzi, Martin, additional, Amorim, Antonio, additional, Bell, David M., additional, Brasseur, Zoé, additional, Dada, Lubna, additional, Duplissy, Jonathan, additional, Finkenzeller, Henning, additional, He, Xu-Cheng, additional, Lamkaddam, Houssni, additional, Mahfouz, Naser G. A., additional, Makhmutov, Vladimir, additional, Manninen, Hanna E., additional, Marie, Guillaume, additional, Marten, Ruby, additional, Mauldin, Roy L., additional, Mentler, Bernhard, additional, Onnela, Antti, additional, Petäjä, Tuukka, additional, Pfeifer, Joschka, additional, Philippov, Maxim, additional, Piedehierro, Ana A., additional, Rörup, Birte, additional, Scholz, Wiebke, additional, Shen, Jiali, additional, Stolzenburg, Dominik, additional, Tauber, Christian, additional, Tian, Ping, additional, Tomé, António, additional, Umo, Nsikanabasi Silas, additional, Wang, Dongyu S., additional, Wang, Yonghong, additional, Weber, Stefan K., additional, Welti, André, additional, Zauner-Wieczorek, Marcel, additional, Baltensperger, Urs, additional, Flagan, Richard C., additional, Hansel, Armin, additional, Kirkby, Jasper, additional, Kulmala, Markku, additional, Lehtipalo, Katrianne, additional, Worsnop, Douglas R., additional, Haddad, Imad El, additional, Donahue, Neil M., additional, Vogel, Alexander L., additional, Kürten, Andreas, additional, and Curtius, Joachim, additional

Published
2023
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20. NO at low concentration can enhance the formation of highly oxygenated biogenic molecules in the atmosphere

Author

Nie, Wei, primary, Yan, Chao, additional, Yang, Liwen, additional, Roldin, Pontus, additional, Liu, Yuliang, additional, Vogel, Alexander L., additional, Molteni, Ugo, additional, Stolzenburg, Dominik, additional, Finkenzeller, Henning, additional, Amorim, Antonio, additional, Bianchi, Federico, additional, Curtius, Joachim, additional, Dada, Lubna, additional, Draper, Danielle C., additional, Duplissy, Jonathan, additional, Hansel, Armin, additional, He, Xu-Cheng, additional, Hofbauer, Victoria, additional, Jokinen, Tuija, additional, Kim, Changhyuk, additional, Lehtipalo, Katrianne, additional, Nichman, Leonid, additional, Mauldin, Roy L., additional, Makhmutov, Vladimir, additional, Mentler, Bernhard, additional, Mizelli-Ojdanic, Andrea, additional, Petäjä, Tuukka, additional, Quéléver, Lauriane L. J., additional, Schallhart, Simon, additional, Simon, Mario, additional, Tauber, Christian, additional, Tomé, António, additional, Volkamer, Rainer, additional, Wagner, Andrea C., additional, Wagner, Robert, additional, Wang, Mingyi, additional, Ye, Penglin, additional, Li, Haiyan, additional, Huang, Wei, additional, Qi, Ximeng, additional, Lou, Sijia, additional, Liu, Tengyu, additional, Chi, Xuguang, additional, Dommen, Josef, additional, Baltensperger, Urs, additional, El Haddad, Imad, additional, Kirkby, Jasper, additional, Worsnop, Douglas, additional, Kulmala, Markku, additional, Donahue, Neil M., additional, Ehn, Mikael, additional, and Ding, Aijun, additional

Published
2023
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21. Global atmospheric particle formation from CERN CLOUD measurements

Author

Dunne, Eimear M., Gordon, Hamish, Kürten, Andreas, Almeida, João, Duplissy, Jonathan, Williamson, Christina, Ortega, Ismael K., Pringle, Kirsty J., Adamov, Alexey, Baltensperger, Urs, Barmet, Peter, Benduhn, Francois, Bianchi, Federico, Breitenlechner, Martin, Clarke, Antony, Curtius, Joachim, Dommen, Josef, Donahue, Neil M., Ehrhart, Sebastian, Flagan, Richard C., Franchin, Alessandro, Guida, Roberto, Hakala, Jani, Hansel, Armin, Heinritzi, Martin, Jokinen, Tuija, Kangasluoma, Juha, Kirkby, Jasper, Kulmala, Markku, Kupc, Agnieszka, Lawler, Michael J., Lehtipalo, Katrianne, Makhmutov, Vladimir, Mann, Graham, Mathot, Serge, Merikanto, Joonas, Miettinen, Pasi, Nenes, Athanasios, Onnela, Antti, Rap, Alexandra, Reddington, Carly L. S., Riccobono, Francesco, Richards, Nigel A. D., Rissanen, Matti P., Rondo, Linda, Sarnela, Nina, Schobesberger, Siegfried, Sengupta, Kamalika, Simon, Mario, Sipilä, Mikko, Smith, James N., Stozkhov, Yuri, Tomé, Antonio, Tröstl, Jasmin, Wagner, Paul E., Wimmer, Daniela, Winkler, Paul M., Worsnop, Douglas R., and Carslaw, Kenneth S.

Published
2016

23. Measurement of the collision rate coefficients between atmospheric ions and multiply charged aerosol particles in the CERN CLOUD chamber

Author

Pfeifer, Joschka, Mahfouz, Naser G. A., Schulze, Benjamin C., Mathot, Serge, Stolzenburg, Dominik, Baalbaki, Rima, Brasseur, Zoé, Caudillo, Lucia, Dada, Lubna, Granzin, Manuel, He, Xu-Cheng, Lamkaddam, Houssni, Lopez, Brandon, Makhmutov, Vladimir, Marten, Ruby, Mentler, Bernhard, Müller, Tatjana, Onnela, Antti, Philippov, Maxim, Piedehierro, Ana A., Rörup, Birte, Schervish, Meredith, Tian, Ping, Umo, Nsikanabasi S., Wang, Dongyu S., Wang, Mingyi, Weber, Stefan K., Welti, André, Wu, Yusheng, Zauner-Wieczorek, Marcel, Amorim, Antonio, Haddad, Imad, Kulmala, Markku, Lehtipalo, Katrianne, Petäjä, Tuukka, Tomé, António, Mirme, Sander, Manninen, Hanna E., Donahue, Neil M., Flagan, Richard C., Kürten, Andreas, Curtius, Joachim, and Kirkby, Jasper

Abstract

Aerosol particles have an important role in Earth's radiation balance and climate, both directly and indirectly through aerosol–cloud interactions. Most aerosol particles in the atmosphere are weakly charged, affecting both their collision rates with ions and neutral molecules, as well as the rates by which they are scavenged by other aerosol particles and cloud droplets. The rate coefficients between ions and aerosol particles are important since they determine the growth rates and lifetimes of ions and charged aerosol particles, and so they may influence cloud microphysics, dynamics, and aerosol processing. However, despite their importance, very few experimental measurements exist of charged aerosol collision rates under atmospheric conditions, where galactic cosmic rays in the lower troposphere give rise to ion pair concentrations of around 1000 cm−3. Here we present measurements in the CERN CLOUD chamber of the rate coefficients between ions and small ( nm) aerosol particles containing up to 9 elementary charges, e. We find the rate coefficient of a singly charged ion with an oppositely charged particle increases from 2.0 (0.4–4.4) × 10−6 cm3 s−1 to 30.6 (24.9–45.1) × 10−6 cm3 s−1 for particles with charges of 1 to 9 e, respectively, where the parentheses indicate the ±1σ uncertainty interval. Our measurements are compatible with theoretical predictions and show excellent agreement with the model of Gatti and Kortshagen (2008).

Published
2023

24. NO at low concentration can enhance the formation of highly oxygenated biogenic molecules in the atmosphere

Author

Nie, Wei, Yan, Chao, Yang, Liwen, Roldin, Pontus, Liu, Yuliang, Vogel, Alexander L, Molteni, Ugo, Stolzenburg, Dominik, Finkenzeller, Henning, Amorim, Antonio, Bianchi, Federico, Curtius, Joachim, Dada, Lubna, Draper, Danielle C, Duplissy, Jonathan, Hansel, Armin, He, Xu-Cheng, Hofbauer, Victoria, Jokinen, Tuija, Kim, Changhyuk, Lehtipalo, Katrianne, Nichman, Leonid, Mauldin, Roy L, Makhmutov, Vladimir, Mentler, Bernhard, Mizelli-Ojdanic, Andrea, Petäjä, Tuukka, Quéléver, Lauriane L J, Schallhart, Simon, Simon, Mario, Tauber, Christian, Tomé, António, Volkamer, Rainer, Wagner, Andrea C, Wagner, Robert, Wang, Mingyi, Ye, Penglin, Li, Haiyan, Huang, Wei, Qi, Ximeng, Lou, Sijia, Liu, Tengyu, Chi, Xuguang, Dommen, Josef, Baltensperger, Urs, Haddad, Imad El, Kirkby, Jasper, Worsnop, Douglas, Kulmala, Markku, Donahue, Neil M, Ehn, Mikael, and Ding, Aijun

Subjects
Physics in General
Abstract

The interaction between nitrogen monoxide (NO) and organic peroxy radicals (RO$_{2}$) greatly impacts the formation of highly oxygenated organic molecules (HOM), the key precursors of secondary organic aerosols. It has been thought that HOM production can be significantly suppressed by NO even at low concentrations. Here, we perform dedicated experiments focusing on HOM formation from monoterpenes at low NO concentrations (0 – 82 pptv). We demonstrate that such low NO can enhance HOM production by modulating the RO$_{2}$ loss and favoring the formation of alkoxy radicals that can continue to autoxidize through isomerization. These insights suggest that HOM yields from typical boreal forest emissions can vary between 2.5%-6.5%, and HOM formation will not be completely inhibited even at high NO concentrations. Our findings challenge the notion that NO monotonically reduces HOM yields by extending the knowledge of RO$_{2}$-NO interactions to the low-NO regime. This represents a major advance towards an accurate assessment of HOM budgets, especially in low-NO environments, which prevails in the pre-industrial atmosphere, pristine areas, and the upper boundary layer.

Published
2023

25. Nitrate radicals suppress biogenic new particle formation from monoterpene oxidation

Author

Li, Dandan, primary, Huang, Wei, additional, Wang, Dongyu, additional, Wang, Mingyi, additional, Thornton, Joel, additional, Caudillo, Lucía, additional, Rörup, Birte, additional, Marten, Ruby, additional, Scholz, Wiebke, additional, Finkenzeller, Henning, additional, Marie, Guillaume, additional, Bell, David, additional, Brasseur, Zoé, additional, Curtius, Joachim, additional, Dada, Lubna, additional, Duplissy, Jonathan, additional, Gong, Xianda, additional, Hansel, Armin, additional, He, Xu-cheng, additional, Hofbauer, Victoria, additional, Junninen, Heikki, additional, Krechmer, Jordan E., additional, Kurten, Andreas, additional, Lamkaddam, Houssni, additional, LEHTIPALO, Katrianne, additional, Lopez, Brandon, additional, Ma, Yingge, additional, Mahfouz, Naser, additional, Manninen, Hanna E., additional, Mentler, Bernhard, additional, Perrier, Sebastien, additional, Petäjä, Tuukka, additional, Pfeifer, Joschka, additional, Philippov, Maxim, additional, Schervish, Meredith, additional, Schobesberger, Siegfried, additional, Shen, Jiali, additional, Surdu, Mihnea, additional, Tomaz, Sophie, additional, Volkamer, Rainer, additional, Wang, Xinke, additional, Weber, Stefan, additional, Welti, André, additional, Worsnop, Douglas, additional, wu, yusheng, additional, Yan, Chao, additional, Zauner-Wieczorek, Marcel, additional, Kulmala, Markku, additional, Kirkby, Jasper, additional, Donahue, Neil, additional, George, Christian, additional, El-Haddad, Imad, additional, Bianchi, Federico, additional, and Riva, Matthieu, additional

Published
2023
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26. Hydroxyl radicals in the Amazon tropical troposphere measured during the CAFE-Brazil field campaign with HORUS

Author

Holzbeck, Philip, primary, Sreekumar, Sreedev, additional, Tsokankunku, Anywhere, additional, Marno, Daniel, additional, Rohloff, Roland, additional, Martinez, Monica, additional, Nussbaumer, Clara, additional, Fischer, Horst, additional, Curtius, Joachim, additional, Pöhlker, Mira, additional, Lelieveld, Jos, additional, and Harder, Hartwig, additional

Published
2023
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27. Impact of reduced aircraft emission on HOx Chemistry in the upper troposphere during BLUESKY Campaign 2020.

Author

Sreekumar, Sreedev, primary, Tsokankunku, Anywhere, additional, Marno, Daniel, additional, Rohloff, Roland, additional, Martinez, Monica, additional, Tadic, Ivan, additional, Hamryszczak, Zaneta, additional, Pozzer, Andrea, additional, Curtius, Joachim, additional, Fischer, Horst, additional, Bohn, Birger, additional, Obersteiner, Florian, additional, Lelieveld, Jos, additional, and Harder, Hartwig, additional

Published
2023
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28. Iodine oxoacids enhance nucleation of sulfuric acid particles in the atmosphere

Author

He, Xu-Cheng, Simon, Mario, Iyer, Siddharth, Xie, Hong-Bin, Rörup, Birte, Shen, Jiali, Finkenzeller, Henning, Stolzenburg, Dominik, Zhang, Rongjie, Baccarini, Andrea, Tham, Yee Jun, Wang, Mingyi, Amanatidis, Stavros, Piedehierro, Ana A., Amorim, Antonio, Baalbaki, Rima, Brasseur, Zoé, Caudillo, Lucía, Chu, Biwu, Dada, Lubna, Duplissy, Jonathan, El Haddad, Imad, Flagan, Richard C., Granzin, Manuel, Hansel, Armin, Heinritzi, Martin, Hofbauer, Victoria, Jokinen, Tuija, Kemppainen, Deniz, Kong, Weimeng, Krechmer, Jordan, Kürten, Andreas, Lamkaddam, Houssni, Lopez, Brandon, Ma, Fangfang, Mahfouz, Naser G. A., Makhmutov, Vladimir, Manninen, Hanna E., Marie, Guillaume, Marten, Ruby, Massabò, Dario, Mauldin, Roy L., Mentler, Bernhard, Onnela, Antti, Petäjä, Tuukka, Pfeifer, Joschka, Philippov, Maxim, Ranjithkumar, Ananth, Rissanen, Matti P., Schobesberger, Siegfried, Scholz, Wiebke, Schulze, Benjamin, Surdu, Mihnea, Thakur, Roseline C., Tomé, António, Wagner, Andrea C., Wang, Dongyu, Wang, Yonghong, Weber, Stefan K., Welti, André, Winkler, Paul M., Zauner-Wieczorek, Marcel, Baltensperger, Urs, Curtius, Joachim, Kurtén, Theo, Worsnop, Douglas R., Volkamer, Rainer, Lehtipalo, Katrianne, Kirkby, Jasper, Donahue, Neil M., Sipilä, Mikko, Kulmala, Markku, He, Xu-Cheng, Simon, Mario, Iyer, Siddharth, Xie, Hong-Bin, Rörup, Birte, Shen, Jiali, Finkenzeller, Henning, Stolzenburg, Dominik, Zhang, Rongjie, Baccarini, Andrea, Tham, Yee Jun, Wang, Mingyi, Amanatidis, Stavros, Piedehierro, Ana A., Amorim, Antonio, Baalbaki, Rima, Brasseur, Zoé, Caudillo, Lucía, Chu, Biwu, Dada, Lubna, Duplissy, Jonathan, El Haddad, Imad, Flagan, Richard C., Granzin, Manuel, Hansel, Armin, Heinritzi, Martin, Hofbauer, Victoria, Jokinen, Tuija, Kemppainen, Deniz, Kong, Weimeng, Krechmer, Jordan, Kürten, Andreas, Lamkaddam, Houssni, Lopez, Brandon, Ma, Fangfang, Mahfouz, Naser G. A., Makhmutov, Vladimir, Manninen, Hanna E., Marie, Guillaume, Marten, Ruby, Massabò, Dario, Mauldin, Roy L., Mentler, Bernhard, Onnela, Antti, Petäjä, Tuukka, Pfeifer, Joschka, Philippov, Maxim, Ranjithkumar, Ananth, Rissanen, Matti P., Schobesberger, Siegfried, Scholz, Wiebke, Schulze, Benjamin, Surdu, Mihnea, Thakur, Roseline C., Tomé, António, Wagner, Andrea C., Wang, Dongyu, Wang, Yonghong, Weber, Stefan K., Welti, André, Winkler, Paul M., Zauner-Wieczorek, Marcel, Baltensperger, Urs, Curtius, Joachim, Kurtén, Theo, Worsnop, Douglas R., Volkamer, Rainer, Lehtipalo, Katrianne, Kirkby, Jasper, Donahue, Neil M., Sipilä, Mikko, and Kulmala, Markku

Abstract

The main nucleating vapor in the atmosphere is thought to be sulfuric acid (H2SO4), stabilized by ammonia (NH3). However, in marine and polar regions, NH3 is generally low, and H2SO4 is frequently found together with iodine oxoacids [HIOx, i.e., iodic acid (HIO3) and iodous acid (HIO2)]. In experiments performed with the CERN CLOUD (Cosmics Leaving OUtdoor Droplets) chamber, we investigated the interplay of H2SO4 and HIOx during atmospheric particle nucleation. We found that HIOx greatly enhances H2SO4(-NH3) nucleation through two different interactions. First, HIO3 strongly binds with H2SO4 in charged clusters so they drive particle nucleation synergistically. Second, HIO2 substitutes for NH3, forming strongly bound H2SO4-HIO2 acid-base pairs in molecular clusters. Global observations imply that HIOx is enhancing H2SO4(-NH3) nucleation rates 10- to 10,000-fold in marine and polar regions.

Published
2023

29. Reduced anthropogenic aerosol radiative forcing caused by biogenic new particle formation

Author

Gordon, Hamish, Sengupta, Kamalika, Rap, Alexandru, Duplissy, Jonathan, Frege, Carla, Williamson, Christina, Heinritzi, Martin, Simon, Mario, Yan, Chao, Almeida, João, Tröstl, Jasmin, Nieminen, Tuomo, Ortega, Ismael K., Wagner, Robert, Dunne, Eimear M., Adamov, Alexey, Amorim, Antonio, Bernhammer, Anne-Kathrin, Bianchi, Federico, Breitenlechner, Martin, Brilke, Sophia, Chen, Xuemeng, Craven, Jill S., Dias, Antonio, Ehrhart, Sebastian, Fischer, Lukas, Flagan, Richard C., Franchin, Alessandro, Fuchs, Claudia, Guida, Roberto, Hakala, Jani, Hoyle, Christopher R., Jokinen, Tuija, Junninen, Heikki, Kangasluoma, Juha, Kim, Jaeseok, Kirkby, Jasper, Krapf, Manuel, Kürten, Andreas, Laaksonen, Ari, Lehtipalo, Katrianne, Makhmutov, Vladimir, Mathot, Serge, Molteni, Ugo, Monks, Sarah A., Onnela, Antti, Peräkylä, Otso, Piel, Felix, Petäjä, Tuukka, Praplan, Arnaud P., Pringle, Kirsty J., Richards, Nigel A. D., Rissanen, Matti P., Rondo, Linda, Sarnela, Nina, Schobesberger, Siegfried, Scott, Catherine E., Seinfeld, John H., Sharma, Sangeeta, Sipilä, Mikko, Steiner, Gerhard, Stozhkov, Yuri, Stratmann, Frank, Tomé, Antonio, Virtanen, Annele, Vogel, Alexander Lucas, Wagner, Andrea C., Wagner, Paul E., Weingartner, Ernest, Wimmer, Daniela, Winkler, Paul M., Ye, Penglin, Zhang, Xuan, Hansel, Armin, Dommen, Josef, Donahue, Neil M., Worsnop, Douglas R., Baltensperger, Urs, Kulmala, Markku, Curtius, Joachim, and Carslaw, Kenneth S.

Published
2016

30. ACRIDICON–CHUVA CAMPAIGN : Studying Tropical Deep Convective Clouds and Precipitation over Amazonia Using the New German Research Aircraft HALO

Author

Wendisch, Manfred, Pöschl, Ulrich, Andreae, Meinrat O., Machado, Luiz A. T., Albrecht, Rachel, Schlager, Hans, Rosenfeld, Daniel, Martin, Scot T., Abdelmonem, Ahmed, Afchine, Armin, Araùjo, Alessandro C., Artaxo, Paulo, Aufmhoff, Heinfried, Barbosa, Henrique M. J., Borrmann, Stephan, Braga, Ramon, Buchholz, Bernhard, Cecchini, Micael Amore, Costa, Anja, Curtius, Joachim, Dollner, Maximilian, Dorf, Marcel, Dreiling, Volker, Ebert, Volker, Ehrlich, André, Ewald, Florian, Fisch, Gilberto, Fix, Andreas, Frank, Fabian, Fütterer, Daniel, Heckl, Christopher, Heidelberg, Fabian, Hüneke, Tilman, Jäkel, Evelyn, Järvinen, Emma, Jurkat, Tina, Kanter, Sandra, Kästner, Udo, Kenntner, Mareike, Kesselmeier, Jürgen, Klimach, Thomas, Knecht, Matthias, Kohl, Rebecca, Kölling, Tobias, Krämer, Martina, Krüger, Mira, Krisna, Trismono Candra, Lavric, Jost V., Longo, Karla, Mahnke, Christoph, Manzi, Antonio O., Mayer, Bernhard, Mertes, Stephan, Minikin, Andreas, Molleker, Sergej, Münch, Steffen, Nillius, Björn, Pfeilsticker, Klaus, Pöhlker, Christopher, Roiger, Anke, Rose, Diana, Rosenow, Dagmar, Sauer, Daniel, Schnaiter, Martin, Schneider, Johannes, Schulz, Christiane, de Souza, Rodrigo A. F., Spanu, Antonio, Stock, Paul, Vila, Daniel, Voigt, Christiane, Walser, Adrian, Walter, David, Weigel, Ralf, Weinzierl, Bernadett, Werner, Frank, Yamasoe, Marcia A., Ziereis, Helmut, Zinner, Tobias, and Zöger, Martin

Published
2016

31. Temperature, humidity, and ionisation effect of iodine oxoacid nucleation

Author

Rörup, Birte, He, Xu-Cheng, Shen, Jiali, Baalbaki, Rima, Dada, Lubna, Sipilä, Mikko, Kirkby, Jasper, Kulmala, Markku, Amorim, Antonio, Baccarini, Andrea, Bell, David M., Caudillo-Plath, Lucía, Duplissy, Jonathan, Finkenzeller, Henning, Kürten, Andreas, Lamkaddam, Houssni, Lee, Chuan Ping, Makhmutov, Vladimir, Manninen, Hanna E., Marie, Guillaume, Marten, Ruby, Mentler, Bernhard, Onnela, Antti, Philippov, Maxim, Scholz, Carolin Wiebke, Simon, Mario, Stolzenburg, Dominik, Tham, Yee Jun, Tomé, António, Wagner, Andrea C., Wang, Mingyi, Wang, Dongyu, Wang, Yonghong, Weber, Stefan K., Zauner-Wieczorek, Marcel, Baltensperger, Urs, Curtius, Joachim, Donahue, Neil M., El Haddad, Imad, Flagan, Richard C., Hansel, Armin, Möhler, Ottmar, Petäjä, Tuukka, Volkamer, Rainer, Worsnop, Douglas, and Lehtipalo, Katrianne

Abstract

Iodine oxoacids are recognised for their significant contribution to the formation of new particles in marine and polar atmospheres. Nevertheless, to incorporate the iodine oxoacid nucleation mechanism into global simulations, it is essential to comprehend how this mechanism varies under various atmospheric conditions. In this study, we combined measurements from the CLOUD (Cosmic Leaving OUtdoor Droplets) chamber at CERN and simulations with a kinetic model to investigate the impact of temperature, ionisation, and humidity on iodine oxoacid nucleation. Our findings reveal that ion-induced particle formation rates remain largely unaffected by changes in temperature. However, neutral particle formation rates experience a significant increase when the temperature drops from +10 °C to −10 °C. Running the kinetic model with varying ionisation rates demonstrates that the particle formation rate only increases with a higher ionisation rate when the iodic acid concentration exceeds 1.5 × 107cm−3, a concentration rarely reached in pristine marine atmospheres. Consequently, our simulations suggest that, despite higher ionisation rates, the charged cluster nucleation pathway of iodic acid is unlikely to be enhanced in the upper troposphere by higher ionisation rates. Instead, the neutral nucleation channel is likely to be the dominant channel in that region. Notably, the iodine oxoacid nucleation mechanism remains unaffected by changes in relative humidity from 2% to 80%. However, under unrealistically dry conditions (below 0.008% RH at +10 °C), iodine oxides (I2O4and I2O5) significantly enhance formation rates. Therefore, we conclude that iodine oxoacid nucleation is the dominant nucleation mechanism for iodine nucleation in the marine and polar boundary layer atmosphere.

Published
2024
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32. Ammonium CI-Orbitrap: a tool for characterizing the reactivity of oxygenated organic molecules.

Author

Dandan Li, Dongyu Wang, Caudillo, Lucia, Scholz, Wiebke, Mingyi Wang, Tomaz, Sophie, Marie, Guillaume, Surdu, Mihnea, Eccli, Elias, Xianda Gong, Gonzalez-Carracedo, Loic, Granzin, Manuel, Pfeifer, Joschka, Rörup, Birte, Schulze, Benjamin, Rantala, Pekka, Perrier, Sébastien, Hansel, Armin, Curtius, Joachim, and Kirkby, Jasper

Subjects
CHEMICAL ionization mass spectrometry, MASS spectrometry, TIME-of-flight mass spectrometers, MASS spectrometers, ATMOSPHERIC aerosols, PINENE, NUCLEAR research
Abstract

Oxygenated organic molecules (OOMs) play an important role in the formation of atmospheric aerosols. Due to various analytical challenges in measuring organic vapors, uncertainties remain in the formation and fate of OOMs. The chemical ionization Orbitrap mass spectrometer (CI-Orbitrap) has recently been shown to be a powerful technique able to accurately identify gaseous organic compounds due to its great mass resolving power. Here we present the ammonium ion (NH4+) based CI-Orbitrap as a technique capable of measuring a wide range of gaseous OOMs. The performance of the CI-(NH4+)-Orbitrap was compared with that of state-of-the-art mass spectrometers, including a nitrate ion (NO3-) based CI coupled to an atmospheric pressure interfaced to long time-of-flight mass spectrometer (APi-LTOF), a new generation of proton transfer reaction-TOF mass spectrometer (PTR3-TOF), and an iodide (I-) based CI-TOF mass spectrometer equipped with a Filter Inlet for Gases and AEROsols (FIGAERO-CIMS). The instruments were deployed simultaneously in the Cosmic Leaving OUtdoors Droplets (CLOUD) chamber at the European Organization for Nuclear Research (CERN) during the CLOUD14 campaign in 2019. Products generated from α-pinene ozonolysis across multiple experimental conditions were simultaneously measured by the mass spectrometers. NH4+-Orbitrap was able to identify the widest range of OOMs (i.e., O = 2), from low oxidized species to highly oxygenated volatile organic compounds (HOM). Excellent agreements were found between the NH4+-Orbitrap and the NO3--LTOF for characterizing HOMs and with the PTR3- TOF for the less oxidized monomeric species. A semi-quantitative information was retrieved for OOMs measured by NH4+-Orbitrap using calibration factors derived from this side-by-side comparison. As other mass spectrometry techniques used during this campaign, the detection sensitivity of NH4+-Orbitrap to OOMs is greatly affected by relative humidity, which may be related to changes in ionization efficiency and/or multiphase chemistry. Overall, this study shows that NH4+ ion46 based chemistry associated with the high mass resolving power of the Orbitrap mass analyzer can measure almost all-inclusive compounds. As a result, it is now possible to cover the entire range of compounds, which can lead to a better understanding of the oxidation processes. [ABSTRACT FROM AUTHOR]

Published
2023
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33. Molecular Understanding of the Enhancement in Organic Aerosol Mass at High Relative Humidity

Author

Surdu, Mihnea, primary, Lamkaddam, Houssni, additional, Wang, Dongyu S., additional, Bell, David M., additional, Xiao, Mao, additional, Lee, Chuan Ping, additional, Li, Dandan, additional, Caudillo, Lucía, additional, Marie, Guillaume, additional, Scholz, Wiebke, additional, Wang, Mingyi, additional, Lopez, Brandon, additional, Piedehierro, Ana A., additional, Ataei, Farnoush, additional, Baalbaki, Rima, additional, Bertozzi, Barbara, additional, Bogert, Pia, additional, Brasseur, Zoé, additional, Dada, Lubna, additional, Duplissy, Jonathan, additional, Finkenzeller, Henning, additional, He, Xu-Cheng, additional, Höhler, Kristina, additional, Korhonen, Kimmo, additional, Krechmer, Jordan E., additional, Lehtipalo, Katrianne, additional, Mahfouz, Naser G. A., additional, Manninen, Hanna E., additional, Marten, Ruby, additional, Massabò, Dario, additional, Mauldin, Roy, additional, Petäjä, Tuukka, additional, Pfeifer, Joschka, additional, Philippov, Maxim, additional, Rörup, Birte, additional, Simon, Mario, additional, Shen, Jiali, additional, Umo, Nsikanabasi Silas, additional, Vogel, Franziska, additional, Weber, Stefan K., additional, Zauner-Wieczorek, Marcel, additional, Volkamer, Rainer, additional, Saathoff, Harald, additional, Möhler, Ottmar, additional, Kirkby, Jasper, additional, Worsnop, Douglas R., additional, Kulmala, Markku, additional, Stratmann, Frank, additional, Hansel, Armin, additional, Curtius, Joachim, additional, Welti, André, additional, Riva, Matthieu, additional, Donahue, Neil M., additional, Baltensperger, Urs, additional, and El Haddad, Imad, additional

Published
2023
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35. Supplementary material to "Measurement of the rate coefficients between atmospheric ions and multiply charged aerosol particles in the CERN CLOUD chamber"

Author

Pfeifer, Joschka, primary, Mahfouz, Naser G., additional, Schulze, Ben, additional, Mathot, Serge, additional, Stolzenburg, Dominik, additional, Baalbaki, Rima, additional, Brasseur, Zoé, additional, Caudillo, Lucia, additional, Dada, Lubna, additional, Granzin, Manuel, additional, He, Xu-Cheng, additional, Lamkaddam, Houssni, additional, Lopez, Brandon, additional, Makhmutov, Vladimir, additional, Marten, Ruby, additional, Mentler, Bernhard, additional, Müller, Tatjana, additional, Onnela, Antti, additional, Philippov, Maxim, additional, Piedehierro, Ana A., additional, Rörup, Birte, additional, Schervish, Meredith, additional, Tian, Ping, additional, Umo, Nsikanabasi S., additional, Wang, Dongyu S., additional, Wang, Mingyi, additional, Weber, Stefan K., additional, Welti, André, additional, Wu, Yusheng, additional, Zauner-Wieczorek, Marcel, additional, Amorim, Antonio, additional, El Haddad, Imad, additional, Kulmala, Markku, additional, Lehtipalo, Katrianne, additional, Petäjä, Tuukka, additional, Tomé, António, additional, Mirme, Sander, additional, Manninen, Hanna E., additional, Donahue, Neil M., additional, Flagan, Richard C., additional, Kürten, Andreas, additional, Curtius, Joachim, additional, and Kirkby, Jasper, additional

Published
2022
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36. Measurement of the rate coefficients between atmospheric ions and multiply charged aerosol particles in the CERN CLOUD chamber

Author

Pfeifer, Joschka, primary, Mahfouz, Naser G., additional, Schulze, Ben, additional, Mathot, Serge, additional, Stolzenburg, Dominik, additional, Baalbaki, Rima, additional, Brasseur, Zoé, additional, Caudillo, Lucia, additional, Dada, Lubna, additional, Granzin, Manuel, additional, He, Xu-Cheng, additional, Lamkaddam, Houssni, additional, Lopez, Brandon, additional, Makhmutov, Vladimir, additional, Marten, Ruby, additional, Mentler, Bernhard, additional, Müller, Tatjana, additional, Onnela, Antti, additional, Philippov, Maxim, additional, Piedehierro, Ana A., additional, Rörup, Birte, additional, Schervish, Meredith, additional, Tian, Ping, additional, Umo, Nsikanabasi S., additional, Wang, Dongyu S., additional, Wang, Mingyi, additional, Weber, Stefan K., additional, Welti, André, additional, Wu, Yusheng, additional, Zauner-Wieczorek, Marcel, additional, Amorim, Antonio, additional, El Haddad, Imad, additional, Kulmala, Markku, additional, Lehtipalo, Katrianne, additional, Petäjä, Tuukka, additional, Tomé, António, additional, Mirme, Sander, additional, Manninen, Hanna E., additional, Donahue, Neil M., additional, Flagan, Richard C., additional, Kürten, Andreas, additional, Curtius, Joachim, additional, and Kirkby, Jasper, additional

Published
2022
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37. The gas-phase formation mechanism of iodic acid as an atmospheric aerosol source

Author

Finkenzeller, Henning, primary, Iyer, Siddharth, additional, He, Xu-Cheng, additional, Simon, Mario, additional, Koenig, Theodore K., additional, Lee, Christopher F., additional, Valiev, Rashid, additional, Hofbauer, Victoria, additional, Amorim, Antonio, additional, Baalbaki, Rima, additional, Baccarini, Andrea, additional, Beck, Lisa, additional, Bell, David M., additional, Caudillo, Lucía, additional, Chen, Dexian, additional, Chiu, Randall, additional, Chu, Biwu, additional, Dada, Lubna, additional, Duplissy, Jonathan, additional, Heinritzi, Martin, additional, Kemppainen, Deniz, additional, Kim, Changhyuk, additional, Krechmer, Jordan, additional, Kürten, Andreas, additional, Kvashnin, Alexandr, additional, Lamkaddam, Houssni, additional, Lee, Chuan Ping, additional, Lehtipalo, Katrianne, additional, Li, Zijun, additional, Makhmutov, Vladimir, additional, Manninen, Hanna E., additional, Marie, Guillaume, additional, Marten, Ruby, additional, Mauldin, Roy L., additional, Mentler, Bernhard, additional, Müller, Tatjana, additional, Petäjä, Tuukka, additional, Philippov, Maxim, additional, Ranjithkumar, Ananth, additional, Rörup, Birte, additional, Shen, Jiali, additional, Stolzenburg, Dominik, additional, Tauber, Christian, additional, Tham, Yee Jun, additional, Tomé, António, additional, Vazquez-Pufleau, Miguel, additional, Wagner, Andrea C., additional, Wang, Dongyu S., additional, Wang, Mingyi, additional, Wang, Yonghong, additional, Weber, Stefan K., additional, Nie, Wei, additional, Wu, Yusheng, additional, Xiao, Mao, additional, Ye, Qing, additional, Zauner-Wieczorek, Marcel, additional, Hansel, Armin, additional, Baltensperger, Urs, additional, Brioude, Jérome, additional, Curtius, Joachim, additional, Donahue, Neil M., additional, Haddad, Imad El, additional, Flagan, Richard C., additional, Kulmala, Markku, additional, Kirkby, Jasper, additional, Sipilä, Mikko, additional, Worsnop, Douglas R., additional, Kurten, Theo, additional, Rissanen, Matti, additional, and Volkamer, Rainer, additional

Published
2022
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38. Long-term filter efficiency of mobile air purifiers in schools

Author

Granzin, Manuel, Richter, Sarah, Schrod, Jann, Schubert, Natalie, and Curtius, Joachim

Abstract

The SARS-CoV-2 pandemic forced many restrictions upon the public, such as the closing of schools, affecting social development and education of children. Here we tested air purifiers with HEPA filters as a measure to reduce the infection risk via airborne transmission during classes. We evaluated the efficiency and long-term performance of three devices over six month of operation at two schools by monitoring the particle decay from 0.003 µm to 10 µm. We found that the particle concentration was reduced reliably and spatially homogenously by 85 – 95% throughout the whole observed particle spectrum within ∼20 minutes for air exchange rates between 4.8 h−1 and 6.7 h−1. During the study we did not observe a clear decline in efficiency or performance of the air purifiers. We complemented our particle measurements with model calculations to estimate the virus concentration and inhaled dose of a susceptible person, assuming one infectious person was present. We calculated that the additional use of air purifiers reduced the number of potentially inhaled viruses at the end of the day by a factor of 2.65 relative to the case without air purifiers. Further, school-wide surveys indicated that the disturbance by the noise level of the air purifiers is to be considered and that the acceptance of air purifiers can be improved when the noise level is reduced. Overall, our study suggests that a combination of air purifiers and venting is a well-suited measure to reduce the potential indoor viral-load while still introducing fresh air into the room.

Published
2023
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39. The ion–ion recombination coefficient α: comparison of temperature- and pressure-dependent parameterisations for the troposphere and stratosphere

Author

Zauner-Wieczorek, Marcel, Curtius, Joachim, and Kürten, Andreas

Abstract

Many different atmospheric, physical, and chemical processes are affected by ions. An important sink for atmospheric ions is the reaction and mutual neutralisation of a positive and negative ion, also called ion–ion recombination. While the value for the ion–ion recombination coefficient α is well-known for standard conditions (namely 1.7 × 10−6 cm3 s−1), it needs to be calculated for deviating temperature and pressure conditions, especially for applications at higher altitudes of the atmosphere. In this work, we review the history of theories and parameterisations of the ion–ion recombination coefficient, focussing on the temperature and pressure dependencies as well as the altitude range between 0 and 50 km. Commencing with theories based on J. J. Thomson's work, we describe important semi-empirical adjustments as well as field, model, and laboratory data sets, followed by short reviews of binary recombination theories, model simulations, and the application of ion–aerosol theories to ion–ion recombination. We present a comparison between theories, parameterisations, and field, model, and laboratory data sets to conclude favourable parameterisations. While many theories agree well with field data above an altitude of approximately 10 km, the nature of the recombination coefficient is still widely unknown between Earth's surface and an altitude of 10 km. According to the current state of knowledge, it appears reasonable to assume an almost constant value for the recombination coefficient for this region, while it is necessary to use values that are adjusted for pressure and temperature for altitudes above 10 km. Suitable parameterisations for different altitude ranges are presented and the need for future research, be it in the laboratory or by means of modelling, is identified.

Published
2022

40. Wissenschaftliche Bewertung des Entwurfs zum HKlimaG

Author

Linow, Sven, Basse, Alexander, Curtius, Joachim, Helbling, Angela Herta, Kuzu, Istemi, Urdze, Sigita, and Wolfermann, Axel

Subjects
Klimaanpassung, Klimaschutz, Hessisches Klimagesetz, HKlimaG
Abstract

Das hessische Kabinett hat in seiner Sitzung am 26.07.2022 den Entwurf eines Gesetzes zur Förderung des Klimaschutzes und zur Anpassung an die Folgen des Klimawandels (Klimagesetz) vorgelegt. Auf diesen Entwurf nehmen wir in dieser Stellungnahme Bezug. Mit dem Klimagesetz soll der Beitrag des Landes Hessen zur Erreichung des 2°C-Ziels sichergestellt und die Folgen der Klimaerwärmung abgemildert werden. Wir begrüßen ausdrücklich, dass die Verantwortlichkeiten und Prozesse für Klimaschutz und Klimaanpassung gesetzlich geregelt werden sollen. Unsere wissenschaftliche Bewertung zeigt leider, dass der Gesetzesentwurf entscheidende Schwachstellen hat, die verhindern, dass die im Gesetz formulierten Ziele erreicht werden können. Die wichtigsten Schwachstellen sind: Klimaschutz und Klimaanpassung müssen als kommunale Pflichtaufgabe verankert werden, denn erst dann besteht die Notwendigkeit für die Kommunen, diese Aufgaben zu bearbeiten, und erst dann werden die Kommunen mit den dafür benötigten Ressourcen ausgestattet. Mit dem jetzt vorgesehenen Finanzierungsvorbehalt und dem Fokus auf freiwillige kurzfristige Förderprogramme sind die Ziele des Gesetzes nicht sicher finanziert. Wir schlagen stattdessen vor, einen Betrag von mindestens 10 % des Landeshaushaltes für Klimaschutz und Klimaanpassung im Gesetz verbindlich zu verankern. Der Gesetzesentwurf ist unzureichend bei der Einbeziehung von Emissionen: Alle Emissionen, die mit Produkten und Dienstleistungen für Hessen verbunden sind, aber außerhalb der Landesgrenze stattfinden, müssen berücksichtigt werden, wenn echte Klimaneutralität erreicht werden soll. Dies ist in der derzeitigen Entwurfsfassung nicht der Fall. Auch sehen wir eine zu großzügige Behandlung der vorgesehenenZertifikate. Hier sollte das Gesetz konsistent alle Emissionen einbeziehen (Scope 1 bis 3, siehe unten).

Published
2022
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41. A multi‐layered strategy for COVID ‐19 infection prophylaxis in schools: A review of the evidence for masks, distancing, and ventilation

Author

McLeod, Robert S., primary, Hopfe, Christina J., additional, Bodenschatz, Eberhard, additional, Moriske, Heinz‐Jörn, additional, Pöschl, Ulrich, additional, Salthammer, Tunga, additional, Curtius, Joachim, additional, Helleis, Frank, additional, Niessner, Jennifer, additional, Herr, Caroline, additional, Klimach, Thomas, additional, Seipp, Martin, additional, Steffens, Thomas, additional, Witt, Christian, additional, and Willich, Stefan N., additional

Published
2022
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43. High Gas-Phase Methanesulfonic Acid Production in the OH-Initiated Oxidation of Dimethyl Sulfide at Low Temperatures

Author

Shen, Jiali, primary, Scholz, Wiebke, additional, He, Xu-Cheng, additional, Zhou, Putian, additional, Marie, Guillaume, additional, Wang, Mingyi, additional, Marten, Ruby, additional, Surdu, Mihnea, additional, Rörup, Birte, additional, Baalbaki, Rima, additional, Amorim, Antonio, additional, Ataei, Farnoush, additional, Bell, David M., additional, Bertozzi, Barbara, additional, Brasseur, Zoé, additional, Caudillo, Lucía, additional, Chen, Dexian, additional, Chu, Biwu, additional, Dada, Lubna, additional, Duplissy, Jonathan, additional, Finkenzeller, Henning, additional, Granzin, Manuel, additional, Guida, Roberto, additional, Heinritzi, Martin, additional, Hofbauer, Victoria, additional, Iyer, Siddharth, additional, Kemppainen, Deniz, additional, Kong, Weimeng, additional, Krechmer, Jordan E., additional, Kürten, Andreas, additional, Lamkaddam, Houssni, additional, Lee, Chuan Ping, additional, Lopez, Brandon, additional, Mahfouz, Naser G. A., additional, Manninen, Hanna E., additional, Massabò, Dario, additional, Mauldin, Roy L., additional, Mentler, Bernhard, additional, Müller, Tatjana, additional, Pfeifer, Joschka, additional, Philippov, Maxim, additional, Piedehierro, Ana A., additional, Roldin, Pontus, additional, Schobesberger, Siegfried, additional, Simon, Mario, additional, Stolzenburg, Dominik, additional, Tham, Yee Jun, additional, Tomé, António, additional, Umo, Nsikanabasi Silas, additional, Wang, Dongyu, additional, Wang, Yonghong, additional, Weber, Stefan K., additional, Welti, André, additional, Wollesen de Jonge, Robin, additional, Wu, Yusheng, additional, Zauner-Wieczorek, Marcel, additional, Zust, Felix, additional, Baltensperger, Urs, additional, Curtius, Joachim, additional, Flagan, Richard C., additional, Hansel, Armin, additional, Möhler, Ottmar, additional, Petäjä, Tuukka, additional, Volkamer, Rainer, additional, Kulmala, Markku, additional, Lehtipalo, Katrianne, additional, Rissanen, Matti, additional, Kirkby, Jasper, additional, El-Haddad, Imad, additional, Bianchi, Federico, additional, Sipilä, Mikko, additional, Donahue, Neil M., additional, and Worsnop, Douglas R., additional

Published
2022
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44. Critical Role of Iodous Acid in Neutral Iodine Oxoacid Nucleation

Author

Zhang, Rongjie, primary, Xie, Hong-Bin, additional, Ma, Fangfang, additional, Chen, Jingwen, additional, Iyer, Siddharth, additional, Simon, Mario, additional, Heinritzi, Martin, additional, Shen, Jiali, additional, Tham, Yee Jun, additional, Kurtén, Theo, additional, Worsnop, Douglas R., additional, Kirkby, Jasper, additional, Curtius, Joachim, additional, Sipilä, Mikko, additional, Kulmala, Markku, additional, and He, Xu-Cheng, additional

Published
2022
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46. An intercomparison study of four different techniques for measuring the chemical composition of nanoparticles

Author

Caudillo, Lucía, primary, Surdu, Mihnea, additional, Lopez, Brandon, additional, Wang, Mingyi, additional, Thoma, Markus, additional, Bräkling, Steffen, additional, Buchholz, Angela, additional, Simon, Mario, additional, Wagner, Andrea C., additional, Müller, Tatjana, additional, Granzin, Manuel, additional, Heinritzi, Martin, additional, Amorim, Antonio, additional, Bell, David M., additional, Brasseur, Zoé, additional, Dada, Lubna, additional, Duplissy, Jonathan, additional, Finkenzeller, Henning, additional, He, Xu-Cheng, additional, Lamkaddam, Houssni, additional, Mahfouz, Naser G. A., additional, Makhmutov, Vladimir, additional, Manninen, Hanna E., additional, Marie, Guillaume, additional, Marten, Ruby, additional, Mauldin, Roy L., additional, Mentler, Bernhard, additional, Onnela, Antti, additional, Petäjä, Tuukka, additional, Pfeifer, Joschka, additional, Philippov, Maxim, additional, Piedehierro, Ana A., additional, Rörup, Birte, additional, Scholz, Wiebke, additional, Shen, Jiali, additional, Stolzenburg, Dominik, additional, Tauber, Christian, additional, Tian, Ping, additional, Tomé, António, additional, Umo, Nsikanabasi Silas, additional, Wang, Dongyu S., additional, Wang, Yonghong, additional, Weber, Stefan K., additional, Welti, André, additional, Zauner-Wieczorek, Marcel, additional, Baltensperger, Urs, additional, Flagan, Richard C., additional, Hansel, Armin, additional, Kirkby, Jasper, additional, Kulmala, Markku, additional, Lehtipalo, Katrianne, additional, Worsnop, Douglas R., additional, Haddad, Imad El, additional, Donahue, Neil M., additional, Vogel, Alexander L., additional, Kürten, Andreas, additional, and Curtius, Joachim, additional

Published
2022
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47. Supplementary material to "An intercomparison study of four different techniques for measuring the chemical composition of nanoparticles"

Author

Caudillo, Lucía, primary, Surdu, Mihnea, additional, Lopez, Brandon, additional, Wang, Mingyi, additional, Thoma, Markus, additional, Bräkling, Steffen, additional, Buchholz, Angela, additional, Simon, Mario, additional, Wagner, Andrea C., additional, Müller, Tatjana, additional, Granzin, Manuel, additional, Heinritzi, Martin, additional, Amorim, Antonio, additional, Bell, David M., additional, Brasseur, Zoé, additional, Dada, Lubna, additional, Duplissy, Jonathan, additional, Finkenzeller, Henning, additional, He, Xu-Cheng, additional, Lamkaddam, Houssni, additional, Mahfouz, Naser G. A., additional, Makhmutov, Vladimir, additional, Manninen, Hanna E., additional, Marie, Guillaume, additional, Marten, Ruby, additional, Mauldin, Roy L., additional, Mentler, Bernhard, additional, Onnela, Antti, additional, Petäjä, Tuukka, additional, Pfeifer, Joschka, additional, Philippov, Maxim, additional, Piedehierro, Ana A., additional, Rörup, Birte, additional, Scholz, Wiebke, additional, Shen, Jiali, additional, Stolzenburg, Dominik, additional, Tauber, Christian, additional, Tian, Ping, additional, Tomé, António, additional, Umo, Nsikanabasi Silas, additional, Wang, Dongyu S., additional, Wang, Yonghong, additional, Weber, Stefan K., additional, Welti, André, additional, Zauner-Wieczorek, Marcel, additional, Baltensperger, Urs, additional, Flagan, Richard C., additional, Hansel, Armin, additional, Kirkby, Jasper, additional, Kulmala, Markku, additional, Lehtipalo, Katrianne, additional, Worsnop, Douglas R., additional, Haddad, Imad El, additional, Donahue, Neil M., additional, Vogel, Alexander L., additional, Kürten, Andreas, additional, and Curtius, Joachim, additional

Published
2022
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48. Numerical simulation of the impact of COVID-19 lockdown on tropospheric composition and aerosol radiative forcing in Europe

Author

Reifenberg, Simon F., primary, Martin, Anna, additional, Kohl, Matthias, additional, Bacer, Sara, additional, Hamryszczak, Zaneta, additional, Tadic, Ivan, additional, Röder, Lenard, additional, Crowley, Daniel J., additional, Fischer, Horst, additional, Kaiser, Katharina, additional, Schneider, Johannes, additional, Dörich, Raphael, additional, Crowley, John N., additional, Tomsche, Laura, additional, Marsing, Andreas, additional, Voigt, Christiane, additional, Zahn, Andreas, additional, Pöhlker, Christopher, additional, Holanda, Bruna A., additional, Krüger, Ovid, additional, Pöschl, Ulrich, additional, Pöhlker, Mira, additional, Jöckel, Patrick, additional, Dorf, Marcel, additional, Schumann, Ulrich, additional, Williams, Jonathan, additional, Bohn, Birger, additional, Curtius, Joachim, additional, Harder, Hardwig, additional, Schlager, Hans, additional, Lelieveld, Jos, additional, and Pozzer, Andrea, additional

Published
2022
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49. Cleaner Skies during the COVID-19 Lockdown

Author

Voigt, Christiane, primary, Lelieveld, Jos, additional, Schlager, Hans, additional, Schneider, Johannes, additional, Curtius, Joachim, additional, Meerkötter, Ralf, additional, Sauer, Daniel, additional, Bugliaro, Luca, additional, Bohn, Birger, additional, Crowley, John N., additional, Erbertseder, Thilo, additional, Groß, Silke, additional, Hahn, Valerian, additional, Li, Qiang, additional, Mertens, Mariano, additional, Pöhlker, Mira L., additional, Pozzer, Andrea, additional, Schumann, Ulrich, additional, Tomsche, Laura, additional, Williams, Jonathan, additional, Zahn, Andreas, additional, Andreae, Meinrat, additional, Borrmann, Stephan, additional, Bräuer, Tiziana, additional, Dörich, Raphael, additional, Dörnbrack, Andreas, additional, Edtbauer, Achim, additional, Ernle, Lisa, additional, Fischer, Horst, additional, Giez, Andreas, additional, Granzin, Manuel, additional, Grewe, Volker, additional, Harder, Hartwig, additional, Heinritzi, Martin, additional, Holanda, Bruna A., additional, Jöckel, Patrick, additional, Kaiser, Katharina, additional, Krüger, Ovid O., additional, Lucke, Johannes, additional, Marsing, Andreas, additional, Martin, Anna, additional, Matthes, Sigrun, additional, Pöhlker, Christopher, additional, Pöschl, Ulrich, additional, Reifenberg, Simon, additional, Ringsdorf, Akima, additional, Scheibe, Monika, additional, Tadic, Ivan, additional, Zauner-Wieczorek, Marcel, additional, Henke, Rolf, additional, and Rapp, Markus, additional

Published
2022
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50. Neutral molecular cluster formation of sulfuric acid-dimethylamine observed in real time under atmospheric conditions

Author

Kürten, Andreas, Jokinen, Tuija, Simon, Mario, Sipilä, Mikko, Sarnela, Nina, Junninen, Heikki, Adamov, Alexey, Almeida, João, Amorim, Antonio, Bianchi, Federico, Breitenlechner, Martin, Dommen, Josef, Donahue, Neil M., Duplissy, Jonathan, Ehrhart, Sebastian, Flagan, Richard C., Franchin, Alessandro, Hakala, Jani, Hansel, Armin, Heinritzi, Martin, Hutterli, Manuel, Kangasluoma, Juha, Kirkby, Jasper, Laaksonen, Ari, Lehtipalo, Katrianne, Leiminger, Markus, Makhmutov, Vladimir, Mathot, Serge, Onnela, Antti, Petäjä, Tuukka, Praplan, Arnaud P., Riccobono, Francesco, Rissanen, Matti P., Rondo, Linda, Schobesberger, Siegfried, Seinfeld, John H., Steiner, Gerhard, Tomé, António, Tröstl, Jasmin, Winkler, Paul M., Williamson, Christina, Wimmer, Daniela, Ye, Penglin, Baltensperger, Urs, Carslaw, Kenneth S., Kulmala, Markku, Worsnop, Douglas R., and Curtius, Joachim

Published
2014

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