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116 results on '"Cecchini, Micael A."'

1. Isoprene nitrates drive new particle formation in Amazon’s upper troposphere

Author

Curtius, Joachim, Heinritzi, Martin, Beck, Lisa J., Pöhlker, Mira L., Tripathi, Nidhi, Krumm, Bianca E., Holzbeck, Philip, Nussbaumer, Clara M., Hernández Pardo, Lianet, Klimach, Thomas, Barmpounis, Konstantinos, Andersen, Simone T., Bardakov, Roman, Bohn, Birger, Cecchini, Micael A., Chaboureau, Jean-Pierre, Dauhut, Thibaut, Dienhart, Dirk, Dörich, Raphael, Edtbauer, Achim, Giez, Andreas, Hartmann, Antonia, Holanda, Bruna A., Joppe, Philipp, Kaiser, Katharina, Keber, Timo, Klebach, Hannah, Krüger, Ovid O., Kürten, Andreas, Mallaun, Christian, Marno, Daniel, Martinez, Monica, Monteiro, Carolina, Nelson, Carolina, Ort, Linda, Raj, Subha S., Richter, Sarah, Ringsdorf, Akima, Rocha, Fabio, Simon, Mario, Sreekumar, Sreedev, Tsokankunku, Anywhere, Unfer, Gabriela R., Valenti, Isabella D., Wang, Nijing, Zahn, Andreas, Zauner-Wieczorek, Marcel, Albrecht, Rachel I., Andreae, Meinrat O., Artaxo, Paulo, Crowley, John N., Fischer, Horst, Harder, Hartwig, Herdies, Dirceu L., Machado, Luiz A. T., Pöhlker, Christopher, Pöschl, Ulrich, Possner, Anna, Pozzer, Andrea, Schneider, Johannes, Williams, Jonathan, and Lelieveld, Jos

Published
2024
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2. Frequent rainfall-induced new particle formation within the canopy in the Amazon rainforest

Author

Machado, Luiz A. T., Unfer, Gabriela R., Brill, Sebastian, Hildmann, Stefanie, Pöhlker, Christopher, Cheng, Yafang, Williams, Jonathan, Hartwig, Harder, Andreae, Meinrat O., Artaxo, Paulo, Curtius, Joachim, Franco, Marco A., Cecchini, Micael A., Edtbauer, Achim, Hoffmann, Thorsten, Holanda, Bruna, Khadir, Théodore, Krejci, Radovan, Kremper, Leslie A., Liu, Yunfan, Meller, Bruno B., Pöhlker, Mira L., Quesada, Carlos A., Ringsdorf, Akima, Riipinen, Ilona, Trumbore, Susan, Wolff, Stefan, Lelieveld, Jos, and Pöschl, Ulrich

Published
2024
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3. Vertically resolved aerosol variability at the Amazon Tall Tower Observatory under wet-season conditions

Author

Franco, Marco A, Valiati, Rafael, Holanda, Bruna A, Meller, Bruno B, Kremper, Leslie A, Rizzo, Luciana V, Carbone, Samara, Morais, Fernando G, Nascimento, Janaína P, Andreae, Meinrat O, Cecchini, Micael A, Machado, Luiz AT, Ponczek, Milena, Pöschl, Ulrich, Walter, David, Pöhlker, Christopher, and Artaxo, Paulo

Subjects
Earth Sciences, Atmospheric Sciences, Astronomical and Space Sciences, Meteorology & Atmospheric Sciences, Atmospheric sciences, Climate change science
Abstract

Abstract. The wet-season atmosphere in the central Amazon resembles natural conditions with minimal anthropogenic influence, making it one of the rare preindustrial-like continental areas worldwide. Previous long-term studies have analyzed the properties and sources of the natural Amazonian background aerosol. However, the vertical profile of the planetary boundary layer (PBL) has not been assessed systematically. Since 2017, such a profile assessment has been possible with the 325 m high tower at the Amazon Tall Tower Observatory (ATTO), located in a largely untouched primary forest in the central Amazon. This study investigates the variability of submicrometer aerosol concentration, size distribution, and optical properties at 60 and 325 m in the Amazonian PBL. The results show significant differences in aerosol volumes and scattering coefficients in the vertical gradient. The aerosol population was well-mixed throughout the boundary layer during the daytime but became separated upon stratification during the nighttime. We also found a significant difference in the spectral dependence of the scattering coefficients between the two heights. The analysis of downdrafts and the related rainfall revealed changes in the aerosol populations before and after rain events, with absorption and scattering coefficients decreasing as optically active particles are removed by wet deposition. The recovery of absorption and scattering coefficients is faster at 325 m than at 60 m. Convective events were concomitant with rapid increases in the concentrations of sub-50 nm particles, which were likely associated with downdrafts. We found that the aerosol population near the canopy had a significantly higher mass scattering efficiency than at 325 m. There was also a clear spectral dependence, with values for λ=450, 525, and 635 nm of 7.74±0.12, 5.49±0.11, and 4.15±0.11 m2 g−1, respectively, at 60 m, while at 325 m the values were 5.26±0.06, 3.76±0.05, and 2.46±0.04 m2 g−1, respectively. The equivalent aerosol refractive index results, which were obtained for the first time for the wet season in the central Amazon, show slightly higher scattering (real) components at 60 m compared to 325 m of 1.33 and 1.27, respectively. In contrast, the refractive index's absorptive (imaginary) component was identical for both heights, at 0.006. This study shows that the aerosol physical properties at 60 and 325 m are different, likely due to aging processes, and strongly depend on the photochemistry, PBL dynamics, and aerosol sources. These findings provide valuable insights into the impact of aerosols on climate and radiative balance and can be used to improve the representation of aerosols in global climate models.

Published
2024

5. List of contributors

Author

Adirosi, Elisa, primary, Alberoni, Pier Paolo, additional, Anagnostou, Emmanouil N., additional, Anagnostou, Marios, additional, Anagnostou, Marios N., additional, Battaglia, Alessandro, additional, Beauchamp, James, additional, Biscaro, Thiago Souza, additional, Bochenek, Bogdan, additional, Borg, Erik, additional, Borrmann, Stephan, additional, Bringi, V.N., additional, Brocca, Luca, additional, Camplani, Andrea, additional, Casella, Daniele, additional, Cauteruccio, Arianna, additional, Cecchini, Micael Amore, additional, Cecil, Daniel, additional, Chen, Ying-Wen, additional, D’Adderio, Leo Pio, additional, Diehl, Karoline, additional, Dietrich, Peter, additional, Dietrich, Stefano, additional, Federico, Stefano, additional, Gastaldo, Thomas, additional, Gatlin, Patrick N., additional, Ikuta, Yasutaka, additional, Jurczyk, Anna, additional, Kalnay, Eugenia, additional, Kalogiros, John, additional, Kanemaru, Kaya, additional, Katsafados, Petros, additional, Katsanos, Dimitrios, additional, Kidd, Chris, additional, Klepp, Christian, additional, Kondo, Keiichi, additional, Kotsuki, Shunji, additional, Kucera, Paul A., additional, Lanza, Luca G., additional, Lien, Guo-Yuan, additional, Linkowska, Joanna, additional, Lombardo, Federico, additional, Maggioni, Viviana, additional, Manzato, Agostino, additional, Massari, Christian, additional, Matsui, Toshihisa, additional, Mattos, Enrique Vieira, additional, Mazzoglio, Paola, additional, Mentzafou, Angeliki, additional, Merino, Andrés, additional, Michaelides, Silas, additional, Mitra, Subir Kumar, additional, Miyoshi, Takemasa, additional, Morsy, Mona, additional, Mroz, Kamil, additional, Navarro, Andrés, additional, Nystuen, Jeffrey A., additional, Okamoto, Kozo, additional, Oliveira, Rômulo Augusto Jucá, additional, Otop, Irena, additional, Otsuka, Shigenori, additional, Ośródka, Katarzyna, additional, Paccagnella, Tiziana, additional, Panegrossi, Giulia, additional, Papadopoulos, Anastasios, additional, Pappa, Aikaterini, additional, Pasierb, Magdalena, additional, Poli, Virginia, additional, Porcù, Federico, additional, Rahman, Khalil Ur, additional, Retalis, Adrianos, additional, Ringerud, Sarah, additional, Sanò, Paolo, additional, Sapiano, Mathew Raymond Paul, additional, Satoh, Masaki, additional, Scholten, Thomas, additional, Shang, Songhao, additional, Sharifi, Ehsan, additional, Sherief, Youssef, additional, Spyrou, Christos, additional, Szakáll, Miklós, additional, Szturc, Jan, additional, Terasaki, Koji, additional, Theis, Alexander, additional, Thurai, Merhala, additional, Tokay, Ali, additional, Tomita, Hirofumi, additional, Torcasio, Rosa Claudia, additional, Tymvios, Filippos, additional, Varlas, George, additional, Vila, Daniel Alejandro, additional, Vulpiani, Gianfranco, additional, Wang, Nai-Yu, additional, Yano, Jun-Ichi, additional, and Yashiro, Hisashi, additional

Published
2022
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7. Supplementary material to "Vertically resolved aerosol variability at the Amazon Tall Tower Observatory under wet season conditions"

Author

Franco, Marco A., primary, Valiati, Rafael, additional, Holanda, Bruna A., additional, Meller, Bruno B., additional, Kremper, Leslie A., additional, Rizzo, Luciana V., additional, Carbone, Samara, additional, Morais, Fernando G., additional, Nascimento, Janaína P., additional, Andreae, Meinrat O., additional, Cecchini, Micael A., additional, Machado, Luiz A. T., additional, Ponczek, Milena, additional, Pöschl, Ulrich, additional, Walter, David, additional, Pöhlker, Christopher, additional, and Artaxo, Paulo, additional

Published
2024
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8. Vertically resolved aerosol variability at the Amazon Tall Tower Observatory under wet season conditions

Author

Franco, Marco A., primary, Valiati, Rafael, additional, Holanda, Bruna A., additional, Meller, Bruno B., additional, Kremper, Leslie A., additional, Rizzo, Luciana V., additional, Carbone, Samara, additional, Morais, Fernando G., additional, Nascimento, Janaína P., additional, Andreae, Meinrat O., additional, Cecchini, Micael A., additional, Machado, Luiz A. T., additional, Ponczek, Milena, additional, Pöschl, Ulrich, additional, Walter, David, additional, Pöhlker, Christopher, additional, and Artaxo, Paulo, additional

Published
2024
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10. 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

11. Advancing understanding of land-atmosphere interactions by breaking discipline and scale barriers

Author

Vilà-Guerau de Arellano, Jordi, Hartogensis, Oscar, Benedict, Imme, de Boer, Hugo, Bosman, Peter J M, Botía, Santiago, Cecchini, Micael Amore, Faassen, Kim A P, González-Armas, Raquel, van Diepen, Kevin, Heusinkveld, Bert G, Janssens, Martin, Lobos-Roco, Felipe, Luijkx, Ingrid T, Machado, Luiz A T, Mangan, Mary Rose, Moene, Arnold F, Mol, Wouter B, van der Molen, Michiel, Moonen, Robbert, Ouwersloot, H G, Park, So-Won, Pedruzo-Bagazgoitia, Xabier, Röckmann, Thomas, Adnew, Getachew Agmuas, Ronda, Reinder, Sikma, Martin, Schulte, Ruben, van Stratum, Bart J H, Veerman, Menno A, van Zanten, Margreet C, van Heerwaarden, Chiel C, Vilà-Guerau de Arellano, Jordi, Hartogensis, Oscar, Benedict, Imme, de Boer, Hugo, Bosman, Peter J M, Botía, Santiago, Cecchini, Micael Amore, Faassen, Kim A P, González-Armas, Raquel, van Diepen, Kevin, Heusinkveld, Bert G, Janssens, Martin, Lobos-Roco, Felipe, Luijkx, Ingrid T, Machado, Luiz A T, Mangan, Mary Rose, Moene, Arnold F, Mol, Wouter B, van der Molen, Michiel, Moonen, Robbert, Ouwersloot, H G, Park, So-Won, Pedruzo-Bagazgoitia, Xabier, Röckmann, Thomas, Adnew, Getachew Agmuas, Ronda, Reinder, Sikma, Martin, Schulte, Ruben, van Stratum, Bart J H, Veerman, Menno A, van Zanten, Margreet C, and van Heerwaarden, Chiel C

Abstract

Vegetation and atmosphere processes are coupled through a myriad of interactions linking plant transpiration, carbon dioxide assimilation, turbulent transport of moisture, heat and atmospheric constituents, aerosol formation, moist convection, and precipitation. Advances in our understanding are hampered by discipline barriers and challenges in understanding the role of small spatiotemporal scales. In this perspective, we propose to study the atmosphere-ecosystem interaction as a continuum by integrating leaf to regional scales (multiscale) and integrating biochemical and physical processes (multiprocesses). The challenges ahead are (1) How do clouds and canopies affect the transferring and in-canopy penetration of radiation, thereby impacting photosynthesis and biogenic chemical transformations? (2) How is the radiative energy spatially distributed and converted into turbulent fluxes of heat, moisture, carbon, and reactive compounds? (3) How do local (leaf-canopy-clouds, 1 m to kilometers) biochemical and physical processes interact with regional meteorology and atmospheric composition (kilometers to 100 km)? (4) How can we integrate the feedbacks between cloud radiative effects and plant physiology to reduce uncertainties in our climate projections driven by regional warming and enhanced carbon dioxide levels? Our methodology integrates fine-scale explicit simulations with new observational techniques to determine the role of unresolved small-scale spatiotemporal processes in weather and climate models.

Published
2023

12. Advancing understanding of land-atmosphere interactions by breaking discipline and scale barriers

Author

Global Ecohydrology and Sustainability, Sub Atmospheric physics and chemistry, Environmental Sciences, Afd Marine and Atmospheric Research, Vilà-Guerau de Arellano, Jordi, Hartogensis, Oscar, Benedict, Imme, de Boer, Hugo, Bosman, Peter J M, Botía, Santiago, Cecchini, Micael Amore, Faassen, Kim A P, González-Armas, Raquel, van Diepen, Kevin, Heusinkveld, Bert G, Janssens, Martin, Lobos-Roco, Felipe, Luijkx, Ingrid T, Machado, Luiz A T, Mangan, Mary Rose, Moene, Arnold F, Mol, Wouter B, van der Molen, Michiel, Moonen, Robbert, Ouwersloot, H G, Park, So-Won, Pedruzo-Bagazgoitia, Xabier, Röckmann, Thomas, Adnew, Getachew Agmuas, Ronda, Reinder, Sikma, Martin, Schulte, Ruben, van Stratum, Bart J H, Veerman, Menno A, van Zanten, Margreet C, van Heerwaarden, Chiel C, Global Ecohydrology and Sustainability, Sub Atmospheric physics and chemistry, Environmental Sciences, Afd Marine and Atmospheric Research, Vilà-Guerau de Arellano, Jordi, Hartogensis, Oscar, Benedict, Imme, de Boer, Hugo, Bosman, Peter J M, Botía, Santiago, Cecchini, Micael Amore, Faassen, Kim A P, González-Armas, Raquel, van Diepen, Kevin, Heusinkveld, Bert G, Janssens, Martin, Lobos-Roco, Felipe, Luijkx, Ingrid T, Machado, Luiz A T, Mangan, Mary Rose, Moene, Arnold F, Mol, Wouter B, van der Molen, Michiel, Moonen, Robbert, Ouwersloot, H G, Park, So-Won, Pedruzo-Bagazgoitia, Xabier, Röckmann, Thomas, Adnew, Getachew Agmuas, Ronda, Reinder, Sikma, Martin, Schulte, Ruben, van Stratum, Bart J H, Veerman, Menno A, van Zanten, Margreet C, and van Heerwaarden, Chiel C

Published
2023

13. Advancing understanding of land–atmosphere interactions by breaking discipline and scale barriers

Author

Vilà‐Guerau de Arellano, Jordi, Hartogensis, Oscar, Benedict, Imme, De Boer, Hugo, Bosman, Peter J.M., Botía, Santiago, Cecchini, Micael Amore, Faassen, Kim A.P., González‐Armas, Raquel, Van Diepen, Kevin, Heusinkveld, Bert G., Janssens, Martin, Lobos‐Roco, Felipe, Luijkx, Ingrid T., Machado, Luiz A.T., Mangan, Mary Rose, Moene, Arnold F., Mol, Wouter B., van der Molen, Michiel, Moonen, Robbert, Ouwersloot, H.G., Park, So-Won, Pedruzo‐Bagazgoitia, Xabier, Röckmann, Thomas, Adnew, Getachew Agmuas, Ronda, Reinder, Sikma, Martin, Schulte, Ruben, Van Stratum, Bart J.H., Veerman, Menno A., Van Zanten, Margreet C., Van Heerwaarden, Chiel C., Vilà‐Guerau de Arellano, Jordi, Hartogensis, Oscar, Benedict, Imme, De Boer, Hugo, Bosman, Peter J.M., Botía, Santiago, Cecchini, Micael Amore, Faassen, Kim A.P., González‐Armas, Raquel, Van Diepen, Kevin, Heusinkveld, Bert G., Janssens, Martin, Lobos‐Roco, Felipe, Luijkx, Ingrid T., Machado, Luiz A.T., Mangan, Mary Rose, Moene, Arnold F., Mol, Wouter B., van der Molen, Michiel, Moonen, Robbert, Ouwersloot, H.G., Park, So-Won, Pedruzo‐Bagazgoitia, Xabier, Röckmann, Thomas, Adnew, Getachew Agmuas, Ronda, Reinder, Sikma, Martin, Schulte, Ruben, Van Stratum, Bart J.H., Veerman, Menno A., Van Zanten, Margreet C., and Van Heerwaarden, Chiel C.

Abstract

Vegetation and atmosphere processes are coupled through a myriad of interactions linking plant transpiration, carbon dioxide assimilation, turbulent transport of moisture, heat and atmospheric constituents, aerosol formation, moist convection, and precipitation. Advances in our understanding are hampered by discipline barriers and challenges in understanding the role of small spatiotemporal scales. In this perspective, we propose to study the atmosphere–ecosystem interaction as a continuum by integrating leaf to regional scales (multiscale) and integrating biochemical and physical processes (multiprocesses). The challenges ahead are (1) How do clouds and canopies affect the transferring and in-canopy penetration of radiation, thereby impacting photosynthesis and biogenic chemical transformations? (2) How is the radiative energy spatially distributed and converted into turbulent fluxes of heat, moisture, carbon, and reactive compounds? (3) How do local (leaf-canopy-clouds, 1 m to kilometers) biochemical and physical processes interact with regional meteorology and atmospheric composition (kilometers to 100 km)? (4) How can we integrate the feedbacks between cloud radiative effects and plant physiology to reduce uncertainties in our climate projections driven by regional warming and enhanced carbon dioxide levels? Our methodology integrates fine-scale explicit simulations with new observational techniques to determine the role of unresolved small-scale spatiotemporal processes in weather and climate models.

Published
2023

14. Dataset: 'The Role of the Atmospheric Electric Field and Downdrafts in the Surface Ozone Concentration in the Amazon'

Author

Unfer, Gabriela R., Machado, Luiz A.T., Albrecht, Rachel, Cecchini, Micael, Harder, Hartwig, Kremper, Leslie Ann, Magina, Flavio C., Pöhlker, Mira, Vila-Guerau de Arellano, Jordi, Williams, Earle, Wolff, Stefan, Pöhlker, Christopher, Unfer, Gabriela R., Machado, Luiz A.T., Albrecht, Rachel, Cecchini, Micael, Harder, Hartwig, Kremper, Leslie Ann, Magina, Flavio C., Pöhlker, Mira, Vila-Guerau de Arellano, Jordi, Williams, Earle, Wolff, Stefan, and Pöhlker, Christopher

Abstract

The dataset used to generate plots for the manuscript "The Role of the Atmospheric Electric Field and Downdrafts in the Surface Ozone Concentration in the Amazon." It contains data of the electric field, downdrafts, ozone, GLM events, and ultrafine particle concentration. All files are in CSV format.

Published
2023

15. Vertically resolved aerosol variability at the Amazon Tall Tower Observatory under wet season conditions.

Author

Franco, Marco A., Valiati, Rafael, Holanda, Bruna A., Meller, Bruno B., Kremper, Leslie A., Rizzo, Luciana V., Carbone, Samara, Morais, Fernando G., Nascimento, Janaína P., Andreae, Meinrat O., Cecchini, Micael A., Machado, Luiz A. T., Ponczek, Milena, Pöschl, Ulrich, Walter, David, Pöhlker, Christopher, and Artaxo, Paulo

Subjects
ATMOSPHERIC boundary layer, CLIMATE change models, AEROSOLS, OBSERVATORIES, REFRACTIVE index
Abstract

The wet season atmosphere in the central Amazon resembles natural conditions with minimal anthropogenic influence, making it one of the rare pre-industrial-like continental areas worldwide. Previous long-term studies have analyzed the properties and sources of the natural Amazonian background aerosol. However, the vertical profile of the planetary boundary layer (PBL) has not been assessed systematically. Since 2017, such a profile assessment has been possible with the 325 m high tower at the Amazon Tall Tower Observatory (ATTO), located in a largely untouched primary forest in central Amazonia. This study investigates the variability of submicrometer aerosol concentration, size distribution, and optical properties at 60 and 325 m height in the Amazon PBL. The results show significant differences in aerosol volumes and scattering coefficients in the vertical gradient. The aerosol population was well-mixed throughout the boundary layer during the daytime but became separated upon stratification during nighttime. We also found a significant difference in the spectral dependence of the scattering coefficients between the two heights. The analysis of rainfall and related downdrafts revealed changes in the aerosol populations before and after rain events, with absorption and scattering coefficients decreasing as optically active particles are removed by wet deposition. The recovery of absorption and scattering coefficients is faster at 325 m than at 60 m. Convective events were concomitant with rapid increases in the concentration of sub-50 nm particles, likely associated with downdrafts. We found that the aerosol population near the canopy had a significantly higher mass scattering efficiency than at 325 m. It was also observed a clear spectral dependence, with values for λ = 450, 525 and 635 nm of 7.74±0.12, 5.49±0.11and 4.15±0.11 m2 g−1, respectively, at 60 m, while at 325 m, the values were 5.26±0.06, 3.76±0.05 and 2.46±0.04 m2 g−1, respectively. The equivalent aerosol refractive index results, which were obtained for the first time for the wet season in central Amazon, show a slightly higher scattering (real) component at 60 m compared to 325 m, of 1.33 and 1.27, respectively. In contrast, the refractive index's absorptive (imaginary) component was identical for both heights, at 0.006. This study shows that the aerosol physical properties at 60 and 325 m height are different, likely due to aging processes, and strongly depend on the photochemistry, PBL dynamics, and aerosol sources. These findings provide valuable insights into the impact of aerosols on climate and radiative balance and can be used to improve the representation of aerosols in global climate models. [ABSTRACT FROM AUTHOR]

Published
2024
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16. Advancing understanding of land–atmosphere interactions by breaking discipline and scale barriers

Author

Vilà‐Guerau de Arellano, Jordi, primary, Hartogensis, Oscar, additional, Benedict, Imme, additional, de Boer, Hugo, additional, Bosman, Peter J. M., additional, Botía, Santiago, additional, Cecchini, Micael Amore, additional, Faassen, Kim A. P., additional, González‐Armas, Raquel, additional, van Diepen, Kevin, additional, Heusinkveld, Bert G., additional, Janssens, Martin, additional, Lobos‐Roco, Felipe, additional, Luijkx, Ingrid T., additional, Machado, Luiz A. T., additional, Mangan, Mary Rose, additional, Moene, Arnold F., additional, Mol, Wouter B., additional, van der Molen, Michiel, additional, Moonen, Robbert, additional, Ouwersloot, H. G., additional, Park, So‐Won, additional, Pedruzo‐Bagazgoitia, Xabier, additional, Röckmann, Thomas, additional, Adnew, Getachew Agmuas, additional, Ronda, Reinder, additional, Sikma, Martin, additional, Schulte, Ruben, additional, van Stratum, Bart J. H., additional, Veerman, Menno A., additional, van Zanten, Margreet C., additional, and van Heerwaarden, Chiel C., additional

Published
2023
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21. Quantifying vertical wind shear effects in shallow cumulus clouds over Amazonia

Author

Cecchini, Micael Amore, De Bruine, Marco, Vilà-Guerau De Arellano, Jordi, Artaxo, Paulo, Cecchini, Micael Amore, De Bruine, Marco, Vilà-Guerau De Arellano, Jordi, and Artaxo, Paulo

Abstract

This study analyses and quantifies the effects of vertical wind shear (VWS) on the properties of shallow cumulus cloud fields over Central Amazonia. We perform idealised simulations with high resolution (50 m horizontally and 20 m vertically) using the Dutch Atmospheric Large-Eddy Simulation (DALES) model, changing the initial conditions and large-scale forcing of VWS. The resulting cloud field is analysed by applying a cloud tracking algorithm to generate Lagrangian datasets of the life cycle of individual clouds as well as their time-varying core and margin dimensions. The reference run has no wind speed or directional shear and represents a typical day in the local dry season. Numerical experiments with moderate and high wind speed shear are simulated by adding linear increases in the wind speed of 1.2 and 2.4 m s−1 km−1, respectively. Three additional runs are made by adding 90∘ of wind rotation between the surface and the top of the domain (5 km) on top of the three wind speed shear conditions. We find that clouds developing in a sheared environment have horizontal equivalent diameter increased by up to 100 m on average, but the cloud depth is reduced. Our quantification shows that VWS tends to increase the size of the cloud cores but reduces their relative area, volume, and mass fractions compared to the overall cloud dimensions. The addition of 2.4 m s−1 km−1 of VWS decreases the relative core area by about 0.03 (about 10 % of the overall average) and its volume and mass ratios by about 0.05 (10 %–25 % in relative terms). Relevant for the cloud transport properties is that the updraught speed and the liquid water content are lower within the cores, and consequently so is the upward mass flux. All quantifications of mean cloud properties point to the inhibition of convective strength by VWS, therefore hampering the shallow-to-deep transition. However, open questions still remain given that the individually deepest clouds were simulated under high environmental

Published
2022

25. How weather events modify aerosol particle size distributions in the Amazon boundary layer

Author

Machado, Luiz A. T., primary, Franco, Marco A., additional, Kremper, Leslie A., additional, Ditas, Florian, additional, Andreae, Meinrat O., additional, Artaxo, Paulo, additional, Cecchini, Micael A., additional, Holanda, Bruna A., additional, Pöhlker, Mira L., additional, Saraiva, Ivan, additional, Wolff, Stefan, additional, Pöschl, Ulrich, additional, and Pöhlker, Christopher, additional

Published
2021
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26. Observed and Simulated Variability of Droplet Spectral Dispersion in Convective Clouds Over the Amazon

Author

Hernández Pardo, Lianet, primary, Machado, Luiz A. T., additional, Morrison, Hugh, additional, Cecchini, Micael A., additional, Andreae, Meinrat O., additional, Pöhlker, Christopher, additional, Pöschl, Ulrich, additional, Rosenfeld, Daniel, additional, Vendrasco, Eder P., additional, Voigt, Christiane, additional, Wendisch, Manfred, additional, and Pöhlker, Mira L., additional

Published
2021
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27. Cloud processes of the main precipitating systems over continental tropical regions

Author

Vila, Daniel Alejandro, Oliveira, Rômulo Augusto Jucá, Biscaro, Thiago Souza, Mattos, Enrique Vieira, Cecchini, Micael A., Vila, Daniel Alejandro, Oliveira, Rômulo Augusto Jucá, Biscaro, Thiago Souza, Mattos, Enrique Vieira, and Cecchini, Micael A.

Abstract

Precipitation is a critical component of Earths hydrological cycle since the latent heat energy contained in the clouds cannot be seen or measured directly. Rainfall, however, is the product of the release of this energy, and rainfall can be measured. Due to the rapid variability and high intermittence, in space and time, of the water and energy cycle elements (rainfall, clouds, and water vapor), the satellite-based retrievals (especially those from low-inclination orbit missions) are the best way to monitor and quantify the water and energy exchanges over the tropics, since the number of available meteorological stations are not enough to cover adequately all continental tropical regions. The aim of this chapter is to summarize the most recent studies on the cloud physical process involved in rainfall occurrence in tropical continental regions, including the main results of CHUVA projectCHUVA, meaning rain in Portugueseand some ground validation activities over Brazil. Some improvement on cloud microphysical description over tropical regions by using polarimetric radars and associated electrification processes will be also presented. Finally, the contribution of the aerosol in the process of formation of precipitation over tropical regions will be showcased in the last section of the chapter., isbn: 9780128229736, Pages: 561-614

Published
2021

28. How weather events modify aerosol particle size distributions in the Amazon boundary layer

Author

Toledo Machado, Luiz Augusto, primary, Franco, Marco A., additional, Kremper, Leslie A., additional, Ditas, Florian, additional, Andreae, Meinrat O., additional, Artaxo, Paulo, additional, Cecchini, Micael A., additional, Holanda, Bruna A., additional, Pöhlker, Mira L., additional, Saraiva, Ivan, additional, Wolff, Stefan, additional, Pöschl, Ulrich, additional, and Pöhlker, Christopher, additional

Published
2021
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31. Comparison of aircraft measurements during GoAmazon2014/5 and ACRIDICON-CHUVA

Author

Mei, Fan, primary, Wang, Jian, additional, Comstock, Jennifer M., additional, Weigel, Ralf, additional, Krämer, Martina, additional, Mahnke, Christoph, additional, Shilling, John E., additional, Schneider, Johannes, additional, Schulz, Christiane, additional, Long, Charles N., additional, Wendisch, Manfred, additional, Machado, Luiz A. T., additional, Schmid, Beat, additional, Krisna, Trismono, additional, Pekour, Mikhail, additional, Hubbe, John, additional, Giez, Andreas, additional, Weinzierl, Bernadett, additional, Zoeger, Martin, additional, Pöhlker, Mira L., additional, Schlager, Hans, additional, Cecchini, Micael A., additional, Andreae, Meinrat O., additional, Martin, Scot T., additional, de Sá, Suzane S., additional, Fan, Jiwen, additional, Tomlinson, Jason, additional, Springston, Stephen, additional, Pöschl, Ulrich, additional, Artaxo, Paulo, additional, Pöhlker, Christopher, additional, Klimach, Thomas, additional, Minikin, Andreas, additional, Afchine, Armin, additional, and Borrmann, Stephan, additional

Published
2020
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33. Supplementary material to "Comparison of Aircraft Measurements during GoAmazon2014/5 and ACRIDICON-CHUVA"

Author

Mei, Fan, primary, Wang, Jian, additional, Comstock, Jennifer M., additional, Weigel, Ralf, additional, Krämer, Martina, additional, Mahnke, Christoph, additional, Shilling, John E., additional, Schneider, Johannes, additional, Long, Charles N., additional, Wendisch, Manfred, additional, Machado, Luiz A. T., additional, Schmid, Beat, additional, Krisna, Trismono, additional, Pekour, Mikhail, additional, Hubbe, John, additional, Giez, Andreas, additional, Weinzierl, Bernadett, additional, Zoeger, Martin, additional, Schulz, Christiane, additional, Pöhlker, Mira L., additional, Schlager, Hans, additional, Cecchini, Micael A., additional, Andreae, Meinrat O., additional, Martin, Scot T., additional, de Sa, Suzane S., additional, Fan, Jiwen, additional, Tomlinson, Jason, additional, Springston, Stephen, additional, Pöschl, Ulrich, additional, Artaxo, Paulo, additional, Pöhlker, Christopher, additional, Klimach, Thomas, additional, Minikin, Andreas, additional, Afchine, Armin, additional, and Borrmann, Stephan, additional

Published
2019
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34. Comparison of Aircraft Measurements during GoAmazon2014/5 and ACRIDICON-CHUVA

Author

Mei, Fan, primary, Wang, Jian, additional, Comstock, Jennifer M., additional, Weigel, Ralf, additional, Krämer, Martina, additional, Mahnke, Christoph, additional, Shilling, John E., additional, Schneider, Johannes, additional, Long, Charles N., additional, Wendisch, Manfred, additional, Machado, Luiz A. T., additional, Schmid, Beat, additional, Krisna, Trismono, additional, Pekour, Mikhail, additional, Hubbe, John, additional, Giez, Andreas, additional, Weinzierl, Bernadett, additional, Zoeger, Martin, additional, Schulz, Christiane, additional, Pöhlker, Mira L., additional, Schlager, Hans, additional, Cecchini, Micael A., additional, Andreae, Meinrat O., additional, Martin, Scot T., additional, de Sa, Suzane S., additional, Fan, Jiwen, additional, Tomlinson, Jason, additional, Springston, Stephen, additional, Pöschl, Ulrich, additional, Artaxo, Paulo, additional, Pöhlker, Christopher, additional, Klimach, Thomas, additional, Minikin, Andreas, additional, Afchine, Armin, additional, and Borrmann, Stephan, additional

Published
2019
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36. Overview: Precipitation characteristics and sensitivities to environmental conditions during GoAmazon2014/5 and ACRIDICON-CHUVA

Author

Machado, Luiz A. T., primary, Calheiros, Alan J. P., additional, Biscaro, Thiago, additional, Giangrande, Scott, additional, Silva Dias, Maria A. F., additional, Cecchini, Micael A., additional, Albrecht, Rachel, additional, Andreae, Meinrat O., additional, Araujo, Wagner F., additional, Artaxo, Paulo, additional, Borrmann, Stephan, additional, Braga, Ramon, additional, Burleyson, Casey, additional, Eichholz, Cristiano W., additional, Fan, Jiwen, additional, Feng, Zhe, additional, Fisch, Gilberto F., additional, Jensen, Michael P., additional, Martin, Scot T., additional, Pöschl, Ulrich, additional, Pöhlker, Christopher, additional, Pöhlker, Mira L., additional, Ribaud, Jean-François, additional, Rosenfeld, Daniel, additional, Saraiva, Jaci M. B., additional, Schumacher, Courtney, additional, Thalman, Ryan, additional, Walter, David, additional, and Wendisch, Manfred, additional

Published
2018
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39. Aerosol characteristics and particle production in the upper troposphere over the Amazon Basin

Author

Andreae, Meinrat O., primary, Afchine, Armin, additional, Albrecht, Rachel, additional, Holanda, Bruna Amorim, additional, Artaxo, Paulo, additional, Barbosa, Henrique M. J., additional, Borrmann, Stephan, additional, Cecchini, Micael A., additional, Costa, Anja, additional, Dollner, Maximilian, additional, Fütterer, Daniel, additional, Järvinen, Emma, additional, Jurkat, Tina, additional, Klimach, Thomas, additional, Konemann, Tobias, additional, Knote, Christoph, additional, Krämer, Martina, additional, Krisna, Trismono, additional, Machado, Luiz A. T., additional, Mertes, Stephan, additional, Minikin, Andreas, additional, Pöhlker, Christopher, additional, Pöhlker, Mira L., additional, Pöschl, Ulrich, additional, Rosenfeld, Daniel, additional, Sauer, Daniel, additional, Schlager, Hans, additional, Schnaiter, Martin, additional, Schneider, Johannes, additional, Schulz, Christiane, additional, Spanu, Antonio, additional, Sperling, Vinicius B., additional, Voigt, Christiane, additional, Walser, Adrian, additional, Wang, Jian, additional, Weinzierl, Bernadett, additional, Wendisch, Manfred, additional, and Ziereis, Helmut, additional

Published
2018
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40. Illustration of microphysical processes in Amazonian deep convective clouds in the gamma phase space: introduction and potential applications

Author

Cecchini, Micael A., primary, Machado, Luiz A. T., additional, Wendisch, Manfred, additional, Costa, Anja, additional, Krämer, Martina, additional, Andreae, Meinrat O., additional, Afchine, Armin, additional, Albrecht, Rachel I., additional, Artaxo, Paulo, additional, Borrmann, Stephan, additional, Fütterer, Daniel, additional, Klimach, Thomas, additional, Mahnke, Christoph, additional, Martin, Scot T., additional, Minikin, Andreas, additional, Molleker, Sergej, additional, Pardo, Lianet H., additional, Pöhlker, Christopher, additional, Pöhlker, Mira L., additional, Pöschl, Ulrich, additional, Rosenfeld, Daniel, additional, and Weinzierl, Bernadett, additional

Published
2017
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41. Overview: Precipitation Characteristics and Sensitivities to the Environmental Conditions during GoAmazon2014/5 and ACRIDICON-CHUVA

Author

Machado, Luiz A. T., primary, Calheiros, Alan J. P., additional, Biscaro, Thiago, additional, Giangrande, Scott, additional, Silva Dias, Maria A. F., additional, Cecchini, Micael A., additional, Albrecht, Rachel, additional, Andreae, Meinrat O., additional, Araujo, Wagner F., additional, Arttaxo, Paulo, additional, Borrmann, Stephan, additional, Braga, Ramon, additional, Burleyson, Casey, additional, Eichholz, Cristiano W., additional, Fan, Jiwen, additional, Feng, Zheng, additional, Fisch, Gilberto F., additional, Jensen, Michael P., additional, Martin, Scot T., additional, Pöschl, Ulrich, additional, Pöhlker, Christopher, additional, Pöhlker, Mira L., additional, Ribaud, Jean-François, additional, Rosenfeld, Daniel, additional, Saraiva, Jaci M. B., additional, Schumacher, Courtney, additional, Thalman, Ryan, additional, Walter, David, additional, and Wendisch, Manfred, additional

Published
2017
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47. Sensitivities of Amazonian clouds to aerosols and updraft speed

Author

Cecchini, Micael A., primary, Machado, Luiz A. T., additional, Andreae, Meinrat O., additional, Martin, Scot T., additional, Albrecht, Rachel I., additional, Artaxo, Paulo, additional, Barbosa, Henrique M. J., additional, Borrmann, Stephan, additional, Fütterer, Daniel, additional, Jurkat, Tina, additional, Mahnke, Christoph, additional, Minikin, Andreas, additional, Molleker, Sergej, additional, Pöhlker, Mira L., additional, Pöschl, Ulrich, additional, Rosenfeld, Daniel, additional, Voigt, Christiane, additional, Weinzierl, Bernadett, additional, and Wendisch, Manfred, additional

Published
2017
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48. Aerosol characteristics and particle production in the upper troposphere over the Amazon Basin

Author

Andreae, Meinrat O., primary, Afchine, Armin, additional, Albrecht, Rachel, additional, Holanda, Bruna Amorim, additional, Artaxo, Paulo, additional, Barbosa, Henrique M. J., additional, Bormann, Stephan, additional, Cecchini, Micael A., additional, Costa, Anja, additional, Dollner, Maximilian, additional, Fütterer, Daniel, additional, Järvinen, Emma, additional, Jurkat, Tina, additional, Klimach, Thomas, additional, Konemann, Tobias, additional, Knote, Christoph, additional, Krämer, Martina, additional, Krisna, Trismono, additional, Machado, Luiz A. T., additional, Mertes, Stephan, additional, Minikin, Andreas, additional, Pöhlker, Christopher, additional, Pöhlker, Mira L., additional, Pöschl, Ulrich, additional, Rosenfeld, Daniel, additional, Sauer, Daniel, additional, Schlager, Hans, additional, Schnaiter, Martin, additional, Schneider, Johannes, additional, Schulz, Christiane, additional, Spanu, Antonio, additional, Sperling, Vinicius B., additional, Voigt, Christiane, additional, Walser, Adrian, additional, Wang, Jian, additional, Weinzierl, Bernadett, additional, Wendisch, Manfred, additional, and Ziereis, Helmut, additional

Published
2017
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49. Supplementary material to "Aerosol characteristics and particle production in the upper troposphere over the Amazon Basin"

Author

Andreae, Meinrat O., primary, Afchine, Armin, additional, Albrecht, Rachel, additional, Holanda, Bruna Amorim, additional, Artaxo, Paulo, additional, Barbosa, Henrique M. J., additional, Bormann, Stephan, additional, Cecchini, Micael A., additional, Costa, Anja, additional, Dollner, Maximilian, additional, Fütterer, Daniel, additional, Järvinen, Emma, additional, Jurkat, Tina, additional, Klimach, Thomas, additional, Konemann, Tobias, additional, Knote, Christoph, additional, Krämer, Martina, additional, Krisna, Trismono, additional, Machado, Luiz A. T., additional, Mertes, Stephan, additional, Minikin, Andreas, additional, Pöhlker, Christopher, additional, Pöhlker, Mira L., additional, Pöschl, Ulrich, additional, Rosenfeld, Daniel, additional, Sauer, Daniel, additional, Schlager, Hans, additional, Schnaiter, Martin, additional, Schneider, Johannes, additional, Schulz, Christiane, additional, Spanu, Antonio, additional, Sperling, Vinicius B., additional, Voigt, Christiane, additional, Walser, Adrian, additional, Wang, Jian, additional, Weinzierl, Bernadett, additional, Wendisch, Manfred, additional, and Ziereis, Helmut, additional

Published
2017
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50. Vertical distribution of the particle phase in tropical deep convective clouds as derived from cloud-side reflected solar radiation measurements

Author

Jäkel, Evelyn, primary, Wendisch, Manfred, additional, Krisna, Trismono C., additional, Ewald, Florian, additional, Kölling, Tobias, additional, Jurkat, Tina, additional, Voigt, Christiane, additional, Cecchini, Micael A., additional, Machado, Luiz A. T., additional, Afchine, Armin, additional, Costa, Anja, additional, Krämer, Martina, additional, Andreae, Meinrat O., additional, Pöschl, Ulrich, additional, Rosenfeld, Daniel, additional, and Yuan, Tianle, additional

Published
2017
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