Global Distribution of Dusty Cloud

Abstract:

The dusty cloud is defined as the hybrid system of dust plume and cloud. It can change the radiative forcing and further alter climate change，and it can also be used as an air pollution index to assess the quality of the atmospheric environment. Currently, the dusty cloud is not well understood. The research uses CALIPSO data through 2007 to 2009 to study the global distributions of dusty cloud. First, we investigate the vertical distribution of dust aerosols and clouds within the dusty clouds. Second, we analyze the global distribution of dusty cloud and the ratio in global distribution of dust cloud and total cloud. Lastly, we study the distributional characteristics of dusty cloud in China. The results show that dusty clouds mainly distributed around the desert region, and the annual variations are minor while the seasonal variations are evident, showing obvious characteristics of the moving north
and south. The Northern Hemisphere spring has a wide range and high strength, and the autumn shows the minimum. The Southern Hemisphere, on the other hand, shows the opposite. The Taklimakan Desert and the Tengger Desert dust have the greatest
influence on distribution of dusty cloud in China.