A. A. Costa's scientific contributions
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Publications (2)
Recent observational studies have shown that biomass burning aerosol can modify the microstructure of convective clouds in tropical regions such as Indonesia and the Amazon. In such regions warm rain development is evidently suppressed during the burning season 5 relative to the wet season, as numerous condensation nuclei produce more numerous but...
Over tropical regions, such as the Amazon, biomass burning is a major source of aerosols that serve as cloud condensation nuclei (CCN). Changes in the cloud microphysics in association with smoke aerosols were first assessed as a possibility via modeling studies or satellite retrievals, and later verified by means of in-situ measurements. In partic...
Citations
... Frequency of occurrence of AOD in wet days show higher dominance (0.4-0.7) (Figures 12b and 12d) and the CER of ice water content (35-40 µm in Figures 13b and 13d) suggest the presence of giant cloud condensation nuclei leading to the occurrence of rainfall with higher intensity. Studies have also shown that giant cloud condensation nuclei and ultra-giant cloud condensation nuclei are responsible for the formation of raindrop embryos, in the development of warm rain in air masses with higher aerosol concentrations under certain conditions (Blyth et al., 2003;Costa & Sherwood, 2005;Johnson, 1982). The CER of liquid is found higher in post-monsoon at coastal site in coherence with northeast monsoon rainfall while pre-monsoon is registered with liquid effective radius more at HACPO. ...
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