Exploring the impact of cirrus clouds in São Paulo
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2024
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WORKSHOP ON LIDAR MEASUREMENTS IN LATIN AMERICA, 12th
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Cirrus clouds play a role in the greenhouse effect by interacting with the outgoing thermal radiation
released by the Earth's surface. There has been a growing interest in studying these clouds in recent
decades, and scientists globally have been gathering data on their physical and optical characteristics.
Understanding their impact on climate is crucial for improvements in atmospheric models. The positive
impact of cirrus clouds on the radiative budget is attributed to their thickness and their ability to allow
shortwave solar radiation while blocking longwave radiation emitted from the surface. These clouds
have extensive coverage across the globe, particularly in tropical regions, significantly influencing the
climate. This study presents an extensive analysis of cirrus cloud characteristics in the São Paulo state
region using data collected by the CALIPSO satellite over eleven years (2007-2017). The investigation
covers various aspects of cirrus clouds, including their distribution, altitude, thickness, temperature,
and optical properties. Yearly distributions reveal prevalent cirrus clouds occurring between 10 and
15 km, with little variations over the years. Monthly distributions highlight seasonal dynamics in base
and top altitudes, while cirrus thickness remains relatively consistent. This study explores cirrus
cloud optical depth (COD), showing variations across different thicknesses. This research aims to
contribute to a deeper understanding of cirrus cloud behavior in South America and its implications
for atmospheric processes.
Como referenciar
SOUZA, GIOVANNI; BARJA, BORIS; LOPES, FABIO J.S.; LANDULFO, EDUARDO; BECA, TOMAS; VAUGHAN, MARK A. Exploring the impact of cirrus clouds in São Paulo: long-term analysis using CALIPSO level 2 data. In: BARJA, BORIS (ed.); LANDULFO, EDUARDO (ed.); LOPES, FABIO J. da S. (ed.). In: WORKSHOP ON LIDAR MEASUREMENTS IN LATIN AMERICA, 12th, April 7-12, 2024, São Paulo, SP. Abstract... p. 44-44. Disponível em: https://repositorio.ipen.br/handle/123456789/48894. Acesso em: 24 Mar 2026.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.