Aerosol relationships to warm season clouds and rainfall at monthly scales over east China: Urban land versus ocean

DOI Web Site Web Site 被引用文献3件
  • Menglin Jin
    Department of Meteorology San José State University San José California USA
  • J. Marshall Shepherd
    Atmospheric Sciences Program, Department of Geography University of Georgia Athens Georgia USA

書誌事項

公開日
2008-12-27
権利情報
  • http://onlinelibrary.wiley.com/termsAndConditions#vor
DOI
  • 10.1029/2008jd010276
公開者
American Geophysical Union (AGU)

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説明

<jats:p>This paper provides a prototype study on combining the advanced satellite observations of rainfall, clouds, and aerosols to examine their interrelationships. Monthly satellite observations from the Tropical Rainfall Measuring Mission (TRMM) and Moderate Resolution Imaging Spectroradiometer (MODIS) for July (2000–2005) were analyzed to assess how urban aerosols affect cloud droplet size and cumulative rainfall over the eastern China mainland and the China Sea, respectively. It seems that aerosol effects may be more evident on clouds than on convective rainfall: high correlation coefficients between aerosol optical thickness (AOT) and water cloud droplet size are observed, while only a weak aerosol‐rainfall relationship is detectable during light rainfall cases (i.e., rainfall rate < 2.5 mm/d) and that is most likely for warm rain clouds only. In addition, aerosols affect clouds more significantly over ocean than over land. Over the ocean, at the monthly scale, the aerosol‐cloud relationship is evident: the cloud effective radius decreases as aerosol optical thickness (AOT) increases. However, over land, cloud effective radius does not show an apparent relationship with aerosol processes, which indicates that aerosols are not the only physical process affecting clouds. Dynamic processes related to factors like urban land cover may play at least an equally critical role in cloud formation.</jats:p>

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