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The NATO Advanced Research Workshop focused on understanding the role of clouds in climate and chemistry. Topics included cloud modeling in GCMs, observations of microphysical properties, the water vapor cycle, troposphere-stratosphere exchange, in-cloud transport's impact on tropospheric ozone, and the influence of anthropogenic sulfate aerosols on cloud properties. Discussions highlighted significant progress and new insights into clouds' roles in the global system. Notably, tropical convective-cirrus cloud systems were identified as major climate influencers. Microphysical processes, such as precipitation rates and ice particle re-evaporation, regulate the vertical distribution of water vapor, the primary greenhouse gas. Data from the Central Equatorial Pacific Experiment (CEPEX) revealed a substantial moistening effect from deep convection over thousands of kilometers. Additionally, a significant chemical finding was the detection of extremely low ozone volume mixing ratios, less than 10- in the central equatorial Pacific troposphere, extending over approximately 2000 km. This establishes the Pacific as a crucial chemical sink for tropospheric ozone. The workshop's findings underscore the complex interactions between clouds and climate, emphasizing the need for continued research in this area.
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Clouds, chemistry and climate, Paul J. Crutzen
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- Pubblicato
- 1995
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