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169 results on '"Mazzoleni, Lynn"'

1. Particle phase-state variability in the North Atlantic free troposphere during summertime is determined by atmospheric transport patterns and sources

Author

Cheng, Zezhen, Morgenstern, Megan, Zhang, Bo, Fraund, Matthew, Lata, Nurun Nahar, Brimberry, Rhenton, Marcus, Matthew A, Mazzoleni, Lynn, Fialho, Paulo, Henning, Silvia, Wehner, Birgit, Mazzoleni, Claudio, and China, Swarup

Subjects
Climate Action, Astronomical and Space Sciences, Atmospheric Sciences, Meteorology & Atmospheric Sciences
Abstract

Free tropospheric aerosol particles have important but poorly constrained climate effects due to transformations of their physicochemical properties during long-range transport. In this study, we investigate the chemical composition and provide an overview of the phase states of individual particles that have undergone long-range transport over the North Atlantic Ocean in June and July 2014, 2015, and 2017 to the Observatory of Mount Pico (OMP) in the Azores. The OMP is an ideal site for studying long-range-transported free tropospheric particles because local emissions have a negligible influence and contributions from the boundary layer are rare. We used the FLEXible PARTicle Lagrangian particle dispersion model (FLEXPART) to determine the origins and transport trajectories of sampled air masses and found that most of them originated from North America and recirculated over the North Atlantic Ocean. The FLEXPART analysis showed that the sampled air masses were highly aged (average plume age >10 d). Size-resolved chemical compositions of individual particles were probed using computer-controlled scanning electron microscopy with an energy-dispersive X-ray spectrometer (CCSEM-EDX) and scanning transmission X-ray microscopy with near-edge X-ray absorption fine structure spectroscopy (STXM-NEXAFS). CCSEM-EDX results showed that the most abundant particle types were carbonaceous (∼ 29.9 % to 82.0 %), sea salt (∼ 0.3 % to 31.6 %), and sea salt with sulfate (∼ 2.4 % to 31.5 %). We used a tilted stage interfaced within an environmental scanning electron microscope (ESEM) to determine the phase states of individual submicron particles. We found that most particles (∼ 47 % to 99 %) were in the liquid state at the time of collection due to inorganic inclusions. Moreover, we also observed substantial fractions of solid and semisolid particles (∼ 0 % to 30 % and ∼ 1 % to 42 %, respectively) during different transport patterns and events, reflecting the particles' phase-state variability for different atmospheric transport events and sources. Combining phase state measurements with FLEXPART CO tracer analysis, we found that wildfire-influenced plumes can result in particles with a wide range of viscosities after long-range transport in the free troposphere. We also used temperature and RH values extracted from the Global Forecast System (GFS) along the FLEXPART-simulated path to predict the phase state of the particles during transport and found that neglecting internal mixing with inorganics would lead to an overestimation of the viscosity of free tropospheric particles. Our findings warrant future investigation aiming at the quantitative assessment of the influence of internal mixing on the phase states of the individual particles. This study also provides insights into the chemical composition and phase state of free tropospheric particles, which can help models to reduce uncertainties about the effects of ambient aerosol particles on climate.

Published
2022

6. Observations of Aerosol, Cloud, Turbulence, and Radiation Properties at the Top of the Marine Boundary Layer over the Eastern North Atlantic Ocean : The ACORES Campaign

Author

Siebert, Holger, Szodry, Kai-Erik, Egerer, Ulrike, Wehner, Birgit, Henning, Silvia, Chevalier, Karine, Lückerath, Janine, Welz, Oliver, Weinhold, Kay, Lauermann, Felix, Gottschalk, Matthias, Ehrlich, André, Wendisch, Manfred, Fialho, Paulo, Roberts, Greg, Allwayin, Nithin, Schum, Simeon, Shaw, Raymond A., Mazzoleni, Claudio, Mazzoleni, Lynn, Nowak, Jakub L., Malinowski, Szymon P., Karpinska, Katarzyna, Kumala, Wojciech, Czyzewska, Dominika, Luke, Edward P., Kollias, Pavlos, Wood, Robert, and Mellado, Juan Pedro

Published
2021

10. Case study evaluation of size-resolved molecular composition and phase state of carbonaceous particles in wildfire influenced smoke from the Pacific Northwest

Author

Vandergrift, Gregory W., primary, Lata, Nurun Nahar, additional, Mathai, Susan, additional, Ijaz, Amna, additional, Cheng, Zezhen, additional, Shrivastava, Manish, additional, Zhang, Jie, additional, Md Shawon, Abu Sayeed, additional, Kulkarni, Gourihar, additional, Mazzoleni, Lynn R., additional, Kew, William, additional, and China, Swarup, additional

Published
2023
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13. Photochemical Mobilization of Dissolved Hydrocarbon Oxidation Products from Petroleum Contaminated Soil into a Shallow Aquifer Activate Human Nuclear Receptors

Author

Zito, Phoebe, primary, Bekins, Barbara A., additional, Martinović-Weigelt, Dalma, additional, Harsha, Maxwell L., additional, Humpal, Katherine E., additional, Trost, Jared, additional, Cozzarelli, Isabelle, additional, Mazzoleni, Lynn Rebecca, additional, Schum, Simeon K., additional, and Podgorski, David C., additional

Published
2023
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17. Particles' phase state variability in the North Atlantic free troposphere during summertime determined by different atmospheric transport patterns and sources

Author

Cheng, Zezhen, primary, Morgenstern, Megan, additional, Zhang, Bo, additional, Fraund, Matthew, additional, Lata, Nurun Nahar, additional, Brimberry, Rhenton, additional, Marcus, Matthew A., additional, Mazzoleni, Lynn, additional, Fialho, Paulo, additional, Henning, Silvia, additional, Wehner, Birgit, additional, Mazzoleni, Claudio, additional, and China, Swarup, additional

Published
2022
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18. Supplementary material to "Particles' phase state variability in the North Atlantic free troposphere during summertime determined by different atmospheric transport patterns and sources"

Author

Cheng, Zezhen, primary, Morgenstern, Megan, additional, Zhang, Bo, additional, Fraund, Matthew, additional, Lata, Nurun Nahar, additional, Brimberry, Rhenton, additional, Marcus, Matthew A., additional, Mazzoleni, Lynn, additional, Fialho, Paulo, additional, Henning, Silvia, additional, Wehner, Birgit, additional, Mazzoleni, Claudio, additional, and China, Swarup, additional

Published
2022
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21. Analytical determination of the Aerosol organic mass-to-organic carbon ratio

Author

Ei-Zanan, Hazem S., Zielinska, Barbara, Mazzoleni, Lynn R., and Hansen, D. Alan

Subjects
Extraction (Chemistry) -- Methods -- Environmental aspects, Organic compounds -- Composition -- Environmental aspects -- Methods, Air quality management -- Methods -- Environmental aspects, Particles -- Composition -- Environmental aspects -- Methods, Environmental services industry, Environmental issues, Science and technology
Abstract

ABSTRACT Particulate matter (PM) with an aerodynamic diameter ≤ 2.5 µm ([PM.sub.2.5]) was collected daily (mid-July 1998 to the end of December 1999) over a 24-hr sampling period in a [...]

Published
2009

22. Variations in speciated emissions from spark-ignition and compression-ignition motor vehicles in California's South Coast Air Basin

Author

Zielinska, Barbara, Arnott, W. Patrick, Mazzoleni, Lynn, Gabele, Peter A., Crews, William, Snow, Richard, Clark, Nigel N., Wayne, W. Scott, and Lawson, Douglas R.

Subjects
Southern California -- Environmental aspects, Air quality management -- Research -- Environmental aspects, Automotive emissions -- Environmental aspects -- Research, Environmental services industry, Environmental issues, Science and technology
Abstract

ABSTRACT The U.S. Department of Energy Gasoline/Diesel PM Split Study examined the sources of uncertainties in using an organic compound-based chemical mass balance receptor model to quantify the contributions of [...]

Published
2007

23. An international laboratory comparison of dissolved organic matter composition by high resolution mass spectrometry : Are we getting the same answer?

Author

Hawkes, Jeffrey A., D'Andrilli, Juliana, Agar, Jeffrey N., Barrow, Mark P., Berg, Stephanie M., Catalan, Nuria, Chen, Hongmei, Chu, Rosalie K., Cole, Richard B., Dittmar, Thorsten, Gavard, Remy, Gleixner, Gerd, Hatcher, Patrick G., He, Chen, Hess, Nancy J., Hutchins, Ryan H. S., Ijaz, Amna, Jones, Hugh E., Kew, William, Khaksari, Maryam, Lozano, Diana Catalina Palacio, Lv, Jitao, Mazzoleni, Lynn R., Noriega-Ortega, Beatriz E., Osterholz, Helena, Radoman, Nikola, Remucal, Christina K., Schmitt, Nicholas D., Schum, Simeon K., Shi, Quan, Simon, Carsten, Singer, Gabriel, Sleighter, Rachel L., Stubbins, Aron, Thomas, Mary J., Tolic, Nikola, Zhang, Shuzhen, Zito, Phoebe, Podgorski, David C., Hawkes, Jeffrey A., D'Andrilli, Juliana, Agar, Jeffrey N., Barrow, Mark P., Berg, Stephanie M., Catalan, Nuria, Chen, Hongmei, Chu, Rosalie K., Cole, Richard B., Dittmar, Thorsten, Gavard, Remy, Gleixner, Gerd, Hatcher, Patrick G., He, Chen, Hess, Nancy J., Hutchins, Ryan H. S., Ijaz, Amna, Jones, Hugh E., Kew, William, Khaksari, Maryam, Lozano, Diana Catalina Palacio, Lv, Jitao, Mazzoleni, Lynn R., Noriega-Ortega, Beatriz E., Osterholz, Helena, Radoman, Nikola, Remucal, Christina K., Schmitt, Nicholas D., Schum, Simeon K., Shi, Quan, Simon, Carsten, Singer, Gabriel, Sleighter, Rachel L., Stubbins, Aron, Thomas, Mary J., Tolic, Nikola, Zhang, Shuzhen, Zito, Phoebe, and Podgorski, David C.

Abstract

High-resolution mass spectrometry (HRMS) has become a vital tool for dissolved organic matter (DOM) characterization. The upward trend in HRMS analysis of DOM presents challenges in data comparison and interpretation among laboratories operating instruments with differing performance and user operating conditions. It is therefore essential that the community establishes metric ranges and compositional trends for data comparison with reference samples so that data can be robustly compared among research groups. To this end, four identically prepared DOM samples were each measured by 16 laboratories, using 17 commercially purchased instruments, using positive-ion and negative-ion mode electrospray ionization (ESI) HRMS analyses. The instruments identified similar to 1000 common ions in both negative- and positive-ion modes over a wide range of m/z values and chemical space, as determined by van Krevelen diagrams. Calculated metrics of abundance-weighted average indices (H/C, O/C, aromaticity and m/z) of the commonly detected ions showed that hydrogen saturation and aromaticity were consistent for each reference sample across the instruments, while average mass and oxygenation were more affected by differences in instrument type and settings. In this paper we present 32 metric values for future benchmarking. The metric values were obtained for the four different parameters from four samples in two ionization modes and can be used in future work to evaluate the performance of HRMS instruments.

Published
2020
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26. An international laboratory comparison of dissolved organic matter composition by high resolution mass spectrometry: Are we getting the same answer?

Author

Hawkes, Jeffrey A., primary, D'Andrilli, Juliana, additional, Agar, Jeffrey N., additional, Barrow, Mark P., additional, Berg, Stephanie M., additional, Catalán, Núria, additional, Chen, Hongmei, additional, Chu, Rosalie K., additional, Cole, Richard B., additional, Dittmar, Thorsten, additional, Gavard, Rémy, additional, Gleixner, Gerd, additional, Hatcher, Patrick G., additional, He, Chen, additional, Hess, Nancy J., additional, Hutchins, Ryan H. S., additional, Ijaz, Amna, additional, Jones, Hugh E., additional, Kew, William, additional, Khaksari, Maryam, additional, Palacio Lozano, Diana Catalina, additional, Lv, Jitao, additional, Mazzoleni, Lynn R, additional, Noriega‐Ortega, Beatriz E., additional, Osterholz, Helena, additional, Radoman, Nikola, additional, Remucal, Christina K., additional, Schmitt, Nicholas D., additional, Schum, Simeon K, additional, Shi, Quan, additional, Simon, Carsten, additional, Singer, Gabriel, additional, Sleighter, Rachel L., additional, Stubbins, Aron, additional, Thomas, Mary J., additional, Tolic, Nikola, additional, Zhang, Shuzhen, additional, Zito, Phoebe, additional, and Podgorski, David C., additional

Published
2020
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27. Particles' phase state variability in the North Atlantic free troposphere during summertime determined by different atmospheric transport patterns and sources.

Author

Zezhen Cheng, Morgenstern, Megan, Bo Zhang, Fraund, Matthew, Lata, Nurun Nahar, Brimberry, Rhenton, Marcus, Matthew A., Mazzoleni, Lynn, Fialho, Paulo, Henning, Silvia, Wehner, Birgit, Mazzoleni, Claudio, and China, Swarup

Abstract

Free tropospheric aerosol particles have important but poorly constrained climate effects due to transformations of their physicochemical properties during long-range transport. In this study, we investigated the chemical composition and provided an overview of the phase state of individual particles that have been long-range transported over the North Atlantic Ocean in June and July 2014, 2015, and 2017 to the Observatory of Mount Pico (OMP), in the Azores. OMP is an ideal site for studying long-range transported free tropospheric particles with negligible influence from local emissions and rare contributions from the boundary layer. We used the FLEXible PARTicle Lagrangian particle dispersion model (FLEXPART) to determine the origin and transport trajectories of sampled air masses and found that most originated from North America and recirculated over the North Atlantic Ocean. The FLEXPART analysis show that the sampled air masses were highly aged (average plume age >10 days). Size-resolved chemical compositions of individual particles were probed using computer-controlled scanning electron microscopy with an energy dispersive X-ray spectrometer (CCSEM-EDX) and scanning transmission X-ray microscopy with near-edge X-ray absorption fine structure spectroscopy (STXM-NEXAFS). CCSEMEDX results show that the most abundant particle types were carbonaceous (~29.9 to 82.0 %), sea salt (~0.3 to 31.6 %), and sea salt with sulfate (~2.4 to 31.5 %). We used a tilted stage interfaced within an Environmental Scanning Electron Microscope (ESEM) to determine the phase state of individual submicron particles. We found that most particles (~47 to 99 %) were in the liquid state at the time of collection due to inorganic inclusions. Moreover, we also observed a substantial fraction of solid and semisolid particles (~0 to 30 % and ~1 to 42 %, respectively) during different transport patterns/events, reflecting the particles' phase state variability for different atmospheric transport events and sources. Combining phase state measurements with FLEXPART CO tracer analysis, we found that wildfire-influenced plumes can result in particles with a wide range of viscosities after long-range transport in the free troposphere. We also used temperature and RH values extracted from the Global Forecast System (GFS) along the FLEXPART simulated path to predict the phase state of the particles during transport and found that neglecting internal mixing with inorganics would overestimate the viscosity of free tropospheric particles. Our findings warrant future investigation on the quantitative assessment of the influence of internal mixing on the phase state of the individual particles. This study also provides insights into the chemical composition and phase state of free tropospheric particles, which can benefit models to reduce uncertainties in ambient aerosol particles' effects on climate. Short summary. We observed a high abundance of liquid and internally mixed particles in samples collected in the North Atlantic free troposphere during summer. We also found several solid and semisolid particles for different emission sources and transport patterns. Our results suggest that considering the mixing state, emission source, and transport patterns of particles is necessary to estimate their phase state in the free troposphere, which is critical for predicting their effects on climate. [ABSTRACT FROM AUTHOR]

Published
2022
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29. Extensive Soot Compaction by Cloud Processing from Laboratory and Field Observations

Author

Bhandari, Janarjan, primary, China, Swarup, additional, Chandrakar, Kamal Kant, additional, Kinney, Greg, additional, Cantrell, Will, additional, Shaw, Raymond A., additional, Mazzoleni, Lynn R., additional, Girotto, Giulia, additional, Sharma, Noopur, additional, Gorkowski, Kyle, additional, Gilardoni, Stefania, additional, Decesari, Stefano, additional, Facchini, Maria Cristina, additional, Zanca, Nicola, additional, Pavese, Giulia, additional, Esposito, Francesco, additional, Dubey, Manvendra K., additional, Aiken, Allison C., additional, Chakrabarty, Rajan K., additional, Moosmüller, Hans, additional, Onasch, Timothy B., additional, Zaveri, Rahul A., additional, Scarnato, Barbara V., additional, Fialho, Paulo, additional, and Mazzoleni, Claudio, additional

Published
2019
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30. Tropospheric Ozone Assessment Report: Database and Metrics Data of Global Surface Ozone Observations

Author

Schultz, Martin G., Schröder, Sabine, Lyapina, Olga, Cooper, Owen, Galbally, Ian, Petropavlovskikh, Irina, von Schneidemesser, Erika, Tanimoto, Hiroshi, Elshorbany, Yasin, Naja, Ma, Seguel, Rodrigo, Dauert, Ute, Eckhardt, Paul, Feigenspahn, Stefan, Fiebig, Ma, Hjellbrekke, Anne-Gunn, Hong, You-Deog, Christian Kjeld, Peter, Koide, Hiroshi, Lear, Gary, Tarasick, David, Ueno, Mikio, Wallasch, Ma, Baumgardner, Darrel, Chuang, Ming-Tung, Gillett, Robert, Lee, Meehye, Molloy, Suzie, Moolla, Raeesa, Wang, Tao, Sharps, Katrina, Adame, Jose A., Ancellet, Gérard, Apadula, Francesco, Artaxo, Paul, Barlasina, Ma, Bogucka, Ma, Bonasoni, Paolo, Chang, Limseok, Colomb, Aurélie, Cuevas, Emilio, Cupeiro, Ma, Degorska, Anna, Ding, Aijun, Fröhlich, Ma, Frolova, Ma, Gadhavi, Harish, GHEUSI, François, Gilge, Stefan, Gonzalez, Ma, Gros, Valérie, Hamad, Samera H., Helmig, Detlev, Henriques, Diamantino, Hermansen, Ove, Holla, Robert, Huber, Jacques, Im, Ulas, Jaffe, Daniel A., Komala, Ninong, Kubistin, Dagmar, Lam, Ka-Se, Laurila, Tuomas, Lee, Haeyoung, Levy, Ilan, Mazzoleni, Claudio, Mazzoleni, Lynn, McClure-Begley, Audra, Mohamad, Maznorizan, Murovic, Marijana, Navarro-Comas, M., Nicodim, Florin, Parrish, David, Read, Katie A., Reid, Nick, Ries, Ludwig, Saxena, Pallavi, Schwab, James J., Scorgie, Yvonne, Senik, Irina, Simmonds, Peter, Sinha, Vinayak, Skorokhod, Andrey, Spain, Gerard, Spangl, Wolfgang, Spoor, Ronald, Springston, Stephen R., Steer, Kelvyn, Steinbacher, Martin, Suharguniyawan, Eka, Torre, Paul, Trickl, Thomas, Weili, Lin, Weller, Rolf, Xu, Xiaobin, Xue, Likun, Zhiqiang, Ma, Institut für Energie- und Klimaforschung - Troposphäre (IEK-8), Forschungszentrum Jülich GmbH | Centre de recherche de Juliers, Helmholtz-Gemeinschaft = Helmholtz Association-Helmholtz-Gemeinschaft = Helmholtz Association, Cooperative Institute for Research in Environmental Sciences (CIRES), University of Colorado [Boulder]-National Oceanic and Atmospheric Administration (NOAA), CSIRO Climate Science Centre, Commonwealth Scientific and Industrial Research Organisation [Canberra] (CSIRO), NOAA Earth System Research Laboratory (ESRL), National Oceanic and Atmospheric Administration (NOAA), Institute for Advanced Sustainability Studies [Potsdam] (IASS), National Institute for Environmental Studies (NIES), NASA Goddard Space Flight Center (GSFC), Aryabhatta Research Institute of Observational Sciences (ARIES), Centro Nacional de Medio Ambiente (CENMA), German Federal Environmental Agency / Umweltbundesamt (UBA), Norwegian Institute for Air Research (NILU), National Institute of Environmental Research [South Korea] (NIER), European Environmental Agency (EEA), Japan Meteorological Agency (JMA), Office of Air and Radiation (OAR), US Environmental Protection Agency (EPA), Environment and Climate Change Canada, Centro de Ciencias de la Atmosfera [Mexico], Universidad Nacional Autónoma de México = National Autonomous University of Mexico (UNAM), National Central University [Taiwan] (NCU), Department of Earth and Environmental Sciences [Korea], Korea University [Seoul], School of Geography, Archaeology and Environmental Studies [Johannesburg] (GAES), University of the Witwatersrand [Johannesburg] (WITS), Department of Civil and Environmental Engineering [Hong Kong] (CEE), The Hong Kong Polytechnic University [Hong Kong] (POLYU), Centre for Ecology and Hydrology [Bangor] (CEH), Natural Environment Research Council (NERC), Instituto Nacional de Técnica Aeroespacial (INTA), TROPO - LATMOS, Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Ricerca sul Sistema Energetico (RSE), Instituto de Fisica da Universidade de São Paulo (IFUSP), Universidade de São Paulo = University of São Paulo (USP), Servicio Meteorológico Nacional [Buenos Aires], Institute of Meteorology and Water Management - National Research Institute (IMGW - PIB), CNR Institute of Atmospheric Sciences and Climate (ISAC), National Research Council of Italy | Consiglio Nazionale delle Ricerche (CNR), Laboratoire de Météorologie Physique (LaMP), Institut national des sciences de l'Univers (INSU - CNRS)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020])-Centre National de la Recherche Scientifique (CNRS), Izaña Atmospheric Research Center (IARC), Agencia Estatal de Meteorología (AEMet), Iinstitute of Environmental Protection - National Research Institute (IOS-PIB), School of Atmospheric Sciences [Nanjing], Nanjing University (NJU), Umweltbundesamt GmbH = Environment Agency Austria, Latvian Environment Geology and Meteorology Centre (LEGMC), National Atmospheric Research Laboratory [Tirupati] (NARL), Indian Space Research Organisation (ISRO), Centre national de recherches météorologiques (CNRM), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS), Zentrum für Medizin-Meteorologische Forschung (ZMMF), Deutscher Wetterdienst [Offenbach] (DWD), Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] (LSCE), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Chimie Atmosphérique Expérimentale (CAE), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), UMD School of Public Health, University of Maryland [College Park], University of Maryland System-University of Maryland System, Institute of Arctic Alpine Research [University of Colorado Boulder] (INSTAAR), University of Colorado [Boulder], Portuguese Institute for Sea and Atmosphere (IMPA), Norsk Institutt for Luftforskning (NILU), Meteorologisches Observatorium Hohenpeißenberg (MOHp), Department of Environmental Science [Roskilde] (ENVS), Aarhus University [Aarhus], School of Science, Technology, Engineering and Mathematics [Bothell] (STEM), University of Washington-Bothell, Indonesian National Institute of Aeronautics and Space (LAPAN), Finnish Meteorological Institute (FMI), National Institute of Meteorological Sciences (NIMS), Air Quality and Climate Change Division [Jerusalem], Israël Ministry of Environmental Protection, Michigan Technological University (MTU), Malaysian Meteorological Department (MetMalaysia), Ministry of Science, Technology and Innovation [Malaysia] (MOSTI), Slovenian Environment Agency, Administratia Nationala de Meteorologie, Department of Chemistry [York, UK], University of York [York, UK], Auckland Council, Jawaharlal Nehru University (JNU), Atmospheric Sciences Research Center (ASRC), University at Albany [SUNY], State University of New York (SUNY)-State University of New York (SUNY), New South Wales Office of Environment and Heritage, A.M.Obukhov Institute of Atmospheric Physics (IAP), Russian Academy of Sciences [Moscow] (RAS), School of Chemistry [Bristol], University of Bristol [Bristol], Indian Institute of Science Education and Research Mohali (IISER Mohali), National University of Ireland [Galway] (NUI Galway), National Institute for Public Health and the Environment [Bilthoven] (RIVM), Brookhaven National Laboratory [Upton, NY] (BNL), UT-Battelle, LLC-Stony Brook University [SUNY] (SBU), State University of New York (SUNY)-State University of New York (SUNY)-U.S. Department of Energy [Washington] (DOE), South Australia Environment Protection Authority (EPA), Swiss Federal Laboratories for Materials Science and Technology [Thun] (EMPA), Indonesian Meteorological, Climatologicall and Geophysical Agency (BMKG), Environment Protection Authority Victoria (EPA ), Institut für Meteorologie und Klimaforschung - Atmosphärische Umweltforschung (IMK-IFU), Karlsruher Institut für Technologie (KIT), China Meteorological Administration (CMA), Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung (AWI), Shandong University, Universidad Nacional Autónoma de México (UNAM), Instituto de Fisica [Sao Paulo], Universidade de São Paulo (USP), Consiglio Nazionale delle Ricerche (CNR), Université Clermont Auvergne [2017-2020] (UCA [2017-2020])-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Umweltbundesamt GmbH/Environment Agency Austria, National Atmospheric Research Laboratory [Tirupathi] (NARL), Météo France-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ), Institute of Arctic and Alpine Research (INSTAAR), U.S. Department of Energy [Washington] (DOE)-UT-Battelle, LLC-Stony Brook University [SUNY] (SBU), and Institut national des sciences de l'Univers (INSU - CNRS)-Météo France-Centre National de la Recherche Scientifique (CNRS)

Subjects
lcsh:GE1-350, tropospheric ozone, [PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph], Monitoring, ground-level ozone, monitoring, database, Tropospheric ozone, Ecology and Environment, Atmospheric Sciences, Database, Earth sciences, ddc:550, Data and Information, Ground-level ozone, lcsh:Environmental sciences
Abstract

In support of the first Tropospheric Ozone Assessment Report (TOAR) a relational database of global surface ozone observations has been developed and populated with hourly measurement data and enhanced metadata. A comprehensive suite of ozone data products including standard statistics, health and vegetation impact metrics, and trend information, are made available through a common data portal and a web interface. These data form the basis of the TOAR analyses focusing on human health, vegetation, and climate relevant ozone issues, which are part of this special feature. Cooperation among many data centers and individual researchers worldwide made it possible to build the world’s largest collection of in-situ hourly surface ozone data covering the period from 1970 to 2015. By combining the data from almost 10,000 measurement sites around the world with global metadata information, new analyses of surface ozone have become possible, such as the first globally consistent characterisations of measurement sites as either urban or rural/remote. Exploitation of these global metadata allows for new insights into the global distribution, and seasonal and long-term changes of tropospheric ozone and they enable TOAR to perform the first, globally consistent analysis of present-day ozone concentrations and recent ozone changes with relevance to health, agriculture, and climate. Considerable effort was made to harmonize and synthesize data formats and metadata information from various networks and individual data submissions. Extensive quality control was applied to identify questionable and erroneous data, including changes in apparent instrument offsets or calibrations. Such data were excluded from TOAR data products. Limitations of a posteriori data quality assurance are discussed. As a result of the work presented here, global coverage of surface ozone data for scientific analysis has been significantly extended. Yet, large gaps remain in the surface observation network both in terms of regions without monitoring, and in terms of regions that have monitoring programs but no public access to the data archive. Therefore future improvements to the database will require not only improved data harmonization, but also expanded data sharing and increased monitoring in data-sparse regions. This work is part of the Tropospheric Ozone Assessment Report (TOAR) which was supported by the International Global Atmospheric Chemistry (IGAC) project, the National Oceanic and Atmospheric Administration (NOAA), Forschungszentrum Jülich, and the World Meteorological Organisation (WMO). Many institutions and agencies sup¬ported the implementation of the measurements, and the processing, quality assurance, and submission of the data contained in the TOAR database.

Published
2017

47. Supplementary material to "Hygroscopic growth of water soluble organic carbon isolated from atmospheric aerosol collected at U.S. national parks and Storm Peak Laboratory"

Author

Taylor, Nathan F., primary, Collins, Don R., additional, Lowenthal, Douglas H., additional, Zielinska, Barbara, additional, Samburova, Vera, additional, Kumar, Naresh, additional, Hallar, A. Gannet, additional, Mazzoleni, Lynn R., additional, and McCubbin, Ian B., additional

Published
2016
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49. Morphology and mixing state of aged soot particles at a remote marine free troposphere site: Implications for optical properties

Author

Naval Postgraduate School (U.S.), Meteorology, China, Swarup, Scarnato, Barbara, Owen, Robert C., Zhang, Bo, Ampadu, Marian T., Kumar, Sumit, Dzepina, Katja, Dziobak, Michael P., Fialho, Paulo, Perlinger, Judith A., Hueber, Jacques, Helmig, Detlev, Mazzoleni, Lynn R., Mazzoleni, Claudio, Naval Postgraduate School (U.S.), Meteorology, China, Swarup, Scarnato, Barbara, Owen, Robert C., Zhang, Bo, Ampadu, Marian T., Kumar, Sumit, Dzepina, Katja, Dziobak, Michael P., Fialho, Paulo, Perlinger, Judith A., Hueber, Jacques, Helmig, Detlev, Mazzoleni, Lynn R., and Mazzoleni, Claudio

Abstract

The radiative properties of soot particles depend on their morphology and mixing state, but their evolution during transport is still elusive. Here we report observations from an electron microscopy analysis of individual particles transported in the free troposphere over long distances to the remote Pico Mountain Observatory in the Azores in the North Atlantic. Approximately 70% of the soot particles were highly compact and of those 26% were thinly coated. Discrete dipole approximation simulations indicate that this compaction results in an increase in soot single scattering albedo by a factor of ≤2.17. The top of the atmosphere direct radiative forcing is typically smaller for highly compact than mass-equivalent lacy soot. The forcing estimated using Mie theory is within 12% of the forcing estimated using the discrete dipole approximation for a high surface albedo, implying that Mie calculations may provide a reasonable approximation for compact soot above remote marine clouds.

Published
2015

50. Measurement of Aerosols and Trace Gases in the Free Troposphere at the Pico Mountain Observatory in the Azores

Author

Kramer, Louisa, Mazzoleni, Claudio, Mazzoleni, Lynn R., Fialho, Paulo, Helmig, Detlev, Olsen, Seth C., Owen, R. Chris, Dziobak, Michael P., Hueber, Jacques, Dzepina, Katja, and Kumar, Sumit

Subjects
Aerossol Atmosférico, Atmospheric Aerosol, Tropospheric Aerosol, Black Carbon, Azores, Pico Island (Azores)
Abstract

European Geosciences Union (EGU), General Assembly. Viena, Austria, 07 - 12 April 2013. Here, we present an overview of gas and aerosol data measured at the Pico Mountain Station. The primary objective of these measurements are to enhance our knowledge of anthropogenic and biomass burning emissions from North America and their relative impact on atmospheric composition and radiative forcing in the free troposphere of the North Atlantic.

Published
2013

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