一次沙尘暴过程中沙尘气溶胶对云物理量和辐射强迫的影响

The Influences of Dust Aerosols on Cloud Properties and Radiative Forcing in a Sandstorm Weather Process

利用MODIS Aqua卫星反演和装载在Aqua上的CERES仪器观测资料，讨论了我国北方地区2004年3月26～28日沙尘暴过程中沙尘气溶胶对云物理特性和辐射强迫的影响。初步结果表明，沙尘气溶胶明显改变了云的物理特性，使云滴变小，含水量及光学厚度减少，减弱了云的净辐射强迫，云的冷却效应受到了抑制，相当于大气层顶沙尘气溶胶的增温作用。

This paper analyzed the influences of dust aerosols on cloud properties and TOA radiative forcing in the process of the dust storm for the period of March 26 to 28 ,2004 over Northwest China,using data collected by MODIS（ Moderate Resolution Imaging Speetromdiometer） and CERES（ Clouds and the Earthg Radiant Energy Budget Scanner） instruments on the Aqua satellite. These dust aerosols decrease the ice diameter,optical depth and ice water path of clouds. Thus, the TOA net radiative forcing of clouds is reduced. This means that the cooling effect of clouds is restrained.