2nd Symposium on Aerosol-Cloud-Climate Interactions
12th Conference on Atmospheric Chemistry


Impact of Asian dust on the surface radiative balance and photosynthetic active radiation: implications for dryland ecosystem functioning

Xin Xi, Georgia Institute of Technology, Atlanta, GA; and I. N. Sokolik

It is well recognized that atmospheric aerosols such as sulfate and black carbon can affect the surface radiative balance and photosynthetic active radiation (PAR), and consequently influence the biogeochemical and water cycles in terrestrial ecosystems. However, very few studies have addressed the impact of dust aerosol on the functioning of dryland ecosystems. The goal of this study is to quantify the extent to which mineral dust can influence the surface energy balance and PAR in the dryland ecosystems in Central and East Asia, considering the regional specifics of the dust properties, vegetation cover, and spectral surface albedo. Modeling assessments were performed in conjunction with satellite multi-sensor data, including aerosol products from the CALIPSO space lidar, and aerosol and land products from MODIS (Moderate Resolution Imaging Spectroradiometer). In addition using data from CERES (Clouds and Earth Radiant Energy System) and MODIS, a statistical correlation analysis was performed to constrain the impact of dust on the regional scale. The results of the study will be presented with the focus on implications for dryland ecosystems.

Joint Poster Session , Aerosol, Cloud, and Climate
Wednesday, 20 January 2010, 2:30 PM-4:00 PM, Exhibit Hall B2

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