Sensitivities of Amazonian clouds to aerosols and updraft speed
The effects of aerosol particles and updraft speed on warm-phase cloud microphysical properties are studied in the Amazon region as part of the ACRIDICON-CHUVA experiment. Here we expand the sensitivity analysis usually found in the literature by concomitantly considering cloud evolution, puttin...
| Main Authors: | , , , , , , , , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2017-08-01
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| Series: | Atmospheric Chemistry and Physics |
| Online Access: | https://www.atmos-chem-phys.net/17/10037/2017/acp-17-10037-2017.pdf |
| _version_ | 1828884002502606848 |
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| author | M. A. Cecchini M. A. Cecchini L. A. T. Machado M. O. Andreae M. O. Andreae S. T. Martin R. I. Albrecht P. Artaxo H. M. J. Barbosa S. Borrmann S. Borrmann D. Fütterer T. Jurkat C. Mahnke C. Mahnke A. Minikin S. Molleker M. L. Pöhlker U. Pöschl D. Rosenfeld C. Voigt C. Voigt B. Weinzierl B. Weinzierl M. Wendisch |
| author_facet | M. A. Cecchini M. A. Cecchini L. A. T. Machado M. O. Andreae M. O. Andreae S. T. Martin R. I. Albrecht P. Artaxo H. M. J. Barbosa S. Borrmann S. Borrmann D. Fütterer T. Jurkat C. Mahnke C. Mahnke A. Minikin S. Molleker M. L. Pöhlker U. Pöschl D. Rosenfeld C. Voigt C. Voigt B. Weinzierl B. Weinzierl M. Wendisch |
| author_sort | M. A. Cecchini |
| collection | DOAJ |
| description | The effects of aerosol particles and updraft speed on
warm-phase cloud microphysical properties are studied in the Amazon region
as part of the ACRIDICON-CHUVA experiment. Here we expand the sensitivity
analysis usually found in the literature by concomitantly considering cloud
evolution, putting the sensitivity quantifications into perspective in
relation to in-cloud processing, and by considering the effects on droplet
size distribution (DSD) shape. Our in situ aircraft measurements over the
Amazon Basin cover a wide range of particle concentration and thermodynamic
conditions, from the pristine regions over coastal and forested areas to the
southern Amazon, which is highly polluted from biomass burning. The quantitative results
show that particle concentration is the primary driver for the vertical
profiles of effective diameter and droplet concentration in the warm phase
of Amazonian convective clouds, while updraft speeds have a modulating role
in the latter and in total condensed water. The cloud microphysical
properties were found to be highly variable with altitude above cloud base,
which we used as a proxy for cloud evolution since it is a measure of the
time droplets that were subject to cloud processing. We show that DSD shape is
crucial in understanding cloud sensitivities. The aerosol effect on DSD
shape was found to vary with altitude, which can help models to better
constrain the indirect aerosol effect on climate. |
| first_indexed | 2024-12-13T10:59:51Z |
| format | Article |
| id | doaj.art-a06cc8dd280a488496fec24461de81b3 |
| institution | Directory Open Access Journal |
| issn | 1680-7316 1680-7324 |
| language | English |
| last_indexed | 2024-12-13T10:59:51Z |
| publishDate | 2017-08-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Atmospheric Chemistry and Physics |
| spelling | doaj.art-a06cc8dd280a488496fec24461de81b32022-12-21T23:49:19ZengCopernicus PublicationsAtmospheric Chemistry and Physics1680-73161680-73242017-08-0117100371005010.5194/acp-17-10037-2017Sensitivities of Amazonian clouds to aerosols and updraft speedM. A. Cecchini0M. A. Cecchini1L. A. T. Machado2M. O. Andreae3M. O. Andreae4S. T. Martin5R. I. Albrecht6P. Artaxo7H. M. J. Barbosa8S. Borrmann9S. Borrmann10D. Fütterer11T. Jurkat12C. Mahnke13C. Mahnke14A. Minikin15S. Molleker16M. L. Pöhlker17U. Pöschl18D. Rosenfeld19C. Voigt20C. Voigt21B. Weinzierl22B. Weinzierl23M. Wendisch24Centro de Previsão de Tempo e Estudos Climáticos, Instituto Nacional de Pesquisas Espaciais, Cachoeira Paulista, BrazilDepartamento de Ciências Atmosféricas, Instituto de Astronomia, Geofísica e Ciências Atmosféricas (IAG), Universidade de São Paulo (USP), BrazilCentro de Previsão de Tempo e Estudos Climáticos, Instituto Nacional de Pesquisas Espaciais, Cachoeira Paulista, BrazilBiogeochemistry, Multiphase Chemistry, and Particle Chemistry Departments, Max Planck Institute for Chemistry, P.O. Box 3060, 55020, Mainz, GermanyScripps Institution of Oceanography, University of California San Diego, La Jolla, CA 92093, USASchool of Engineering and Applied Sciences and Department of Earth and Planetary Sciences, Harvard University, Cambridge, Massachusetts, USADepartamento de Ciências Atmosféricas, Instituto de Astronomia, Geofísica e Ciências Atmosféricas (IAG), Universidade de São Paulo (USP), BrazilInstituto de Física (IF), Universidade de São Paulo (USP), São Paulo, BrazilInstituto de Física (IF), Universidade de São Paulo (USP), São Paulo, BrazilBiogeochemistry, Multiphase Chemistry, and Particle Chemistry Departments, Max Planck Institute for Chemistry, P.O. Box 3060, 55020, Mainz, GermanyInstitut für Physik der Atmosphäre (IPA), Johannes Gutenberg-Universität, Mainz, GermanyInstitut für Physik der Atmosphäre, Deutsches Zentrum für Luft- und Raumfahrt (DLR), Oberpfaffenhofen, 82234 Wessling, GermanyInstitut für Physik der Atmosphäre, Deutsches Zentrum für Luft- und Raumfahrt (DLR), Oberpfaffenhofen, 82234 Wessling, GermanyBiogeochemistry, Multiphase Chemistry, and Particle Chemistry Departments, Max Planck Institute for Chemistry, P.O. Box 3060, 55020, Mainz, GermanyInstitut für Physik der Atmosphäre (IPA), Johannes Gutenberg-Universität, Mainz, GermanyFlugexperimente, Deutsches Zentrum für Luft- und Raumfahrt (DLR), Oberpfaffenhofen, GermanyInstitut für Physik der Atmosphäre (IPA), Johannes Gutenberg-Universität, Mainz, GermanyBiogeochemistry, Multiphase Chemistry, and Particle Chemistry Departments, Max Planck Institute for Chemistry, P.O. Box 3060, 55020, Mainz, GermanyBiogeochemistry, Multiphase Chemistry, and Particle Chemistry Departments, Max Planck Institute for Chemistry, P.O. Box 3060, 55020, Mainz, GermanyInstitute of Earth Sciences, The Hebrew University of Jerusalem, Jerusalem, IsraelInstitut für Physik der Atmosphäre (IPA), Johannes Gutenberg-Universität, Mainz, GermanyInstitut für Physik der Atmosphäre, Deutsches Zentrum für Luft- und Raumfahrt (DLR), Oberpfaffenhofen, 82234 Wessling, GermanyInstitut für Physik der Atmosphäre, Deutsches Zentrum für Luft- und Raumfahrt (DLR), Oberpfaffenhofen, 82234 Wessling, GermanyFaculty of Physics, University of Vienna, Boltzmanngasse 5, 1090 Vienna, AustriaLeipziger Institut für Meteorologie (LIM), Universität Leipzig, Stephanstr. 3, 04103 Leipzig, GermanyThe effects of aerosol particles and updraft speed on warm-phase cloud microphysical properties are studied in the Amazon region as part of the ACRIDICON-CHUVA experiment. Here we expand the sensitivity analysis usually found in the literature by concomitantly considering cloud evolution, putting the sensitivity quantifications into perspective in relation to in-cloud processing, and by considering the effects on droplet size distribution (DSD) shape. Our in situ aircraft measurements over the Amazon Basin cover a wide range of particle concentration and thermodynamic conditions, from the pristine regions over coastal and forested areas to the southern Amazon, which is highly polluted from biomass burning. The quantitative results show that particle concentration is the primary driver for the vertical profiles of effective diameter and droplet concentration in the warm phase of Amazonian convective clouds, while updraft speeds have a modulating role in the latter and in total condensed water. The cloud microphysical properties were found to be highly variable with altitude above cloud base, which we used as a proxy for cloud evolution since it is a measure of the time droplets that were subject to cloud processing. We show that DSD shape is crucial in understanding cloud sensitivities. The aerosol effect on DSD shape was found to vary with altitude, which can help models to better constrain the indirect aerosol effect on climate.https://www.atmos-chem-phys.net/17/10037/2017/acp-17-10037-2017.pdf |
| spellingShingle | M. A. Cecchini M. A. Cecchini L. A. T. Machado M. O. Andreae M. O. Andreae S. T. Martin R. I. Albrecht P. Artaxo H. M. J. Barbosa S. Borrmann S. Borrmann D. Fütterer T. Jurkat C. Mahnke C. Mahnke A. Minikin S. Molleker M. L. Pöhlker U. Pöschl D. Rosenfeld C. Voigt C. Voigt B. Weinzierl B. Weinzierl M. Wendisch Sensitivities of Amazonian clouds to aerosols and updraft speed Atmospheric Chemistry and Physics |
| title | Sensitivities of Amazonian clouds to aerosols and updraft speed |
| title_full | Sensitivities of Amazonian clouds to aerosols and updraft speed |
| title_fullStr | Sensitivities of Amazonian clouds to aerosols and updraft speed |
| title_full_unstemmed | Sensitivities of Amazonian clouds to aerosols and updraft speed |
| title_short | Sensitivities of Amazonian clouds to aerosols and updraft speed |
| title_sort | sensitivities of amazonian clouds to aerosols and updraft speed |
| url | https://www.atmos-chem-phys.net/17/10037/2017/acp-17-10037-2017.pdf |
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