| Texto completo | |
| Autor(es): Mostrar menos - |
Cecchini, Micael A.
;
Machado, Luiz A. T.
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Andreae, Meinrat O.
;
Martin, Scot T.
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Albrecht, Rachel I.
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Artaxo, Paulo
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Barbosa, Henrique M. J.
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Borrmann, Stephan
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Fuetterer, Daniel
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Jurkat, Tina
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Mahnke, Christoph
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Minikin, Andreas
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Molleker, Sergej
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Poehlker, Mira L.
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Poeschl, Ulrich
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Rosenfeld, Daniel
;
Voigt, Christiane
;
Weinzierl, Bernadett
;
Wendisch, Manfred
Número total de Autores: 19
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| Tipo de documento: | Artigo Científico |
| Fonte: | Atmospheric Chemistry and Physics; v. 17, n. 16, p. 10037-10050, AUG 28 2017. |
| Citações Web of Science: | 11 |
| Resumo | |
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. (AU) | |
| Processo FAPESP: | 14/21189-7 - Ciclo de vida das propriedades microfísicas das nuvens amazônicas e sua interação com os aerossóis |
| Beneficiário: | Micael Amore Cecchini |
| Modalidade de apoio: | Bolsas no Exterior - Estágio de Pesquisa - Doutorado |
| Processo FAPESP: | 13/05014-0 - GoAmazon: interação da pluma urbana de Manaus com emissões biogênicas da Floresta Amazônica |
| Beneficiário: | Paulo Eduardo Artaxo Netto |
| Modalidade de apoio: | Auxílio à Pesquisa - Programa de Pesquisa sobre Mudanças Climáticas Globais - Temático |
| Processo FAPESP: | 14/08615-7 - Processos de formação da precipitação: um estudo sobre a microfísica, a interação com aerossóis e o ciclo de vida da nuvem a partir de medidas de radares e aeronaves |
| Beneficiário: | Micael Amore Cecchini |
| Modalidade de apoio: | Bolsas no Brasil - Doutorado |
| Processo FAPESP: | 09/15235-8 - Processos de nuvens associados aos principais sistemas precipitantes no Brasil: uma contribuição à modelagem da escala de nuvens e ao GPM (Medida Global de Precipitação) |
| Beneficiário: | Luiz Augusto Toledo Machado |
| Modalidade de apoio: | Auxílio à Pesquisa - Temático |