%0 Journal Article
%T The Impacts of Dust Aerosol from Deserts of China on the Radiative Heating Rate over Desert Sources and the North Pacific Region<br>中国沙漠沙尘气溶胶对沙漠源区及北太平洋地区大气辐射加热的影响
%A WANG Hong
%A SHI Guang-Yu
%A WANG Biao and
%A <br>王宏
%A 石广玉
%A 王标
%A 等
%J 大气科学
%D 2007
%I 
%X Using the dust distribution data in spring 2001 the radiative heating(cooling) rates over deserts of China and the North Pacific Ocean are calculated and the impacts of low,middle and high clouds on the heating rate are discussed with a radiative transfer model.The studies show that the dust layer over deserts of China and the North Pacific region can heat the atmosphere evidently.The heating rate is 2.8 K/d over China's desert and 0.4 K/d over the Pacific region corresponding to the optical depth of dust aerosol of 1.0 and 0.3 with spring averaged solar altitude.The heating rate using WMO dust model is higher 1.5 K/d over desert and 0.2 K/d over the Pacific than those of East Asian dust model because of the strong absorption of WMO dust model.The heating rate strongly depends on the dust concentration in the atmosphere and this dependency is affected by solar altitude firstly and then by surface albedo.The impacts of clouds on the radiative heating rate depend on the height and thickness of clouds.Low cloud heats the dust atmosphere over desert and ocean while cool the surface of land and ocean.Middle and high cloud cools the dust atmosphere over desert.Over ocean area,middle cloud heats the dust layer over it and cools the dust layer below it.The impacts of high cloud on the radiative heating rate over ocean area highly depend on the thickness of cloud.Thin cloud may heat the dust layer while thick cloud may possibly cool it.
%K radiative transfer model
%K radiative heating rate
%K optical depth
%K dust model<br>辐射传输模式
%K 辐射加热率
%K 光学厚度
%K 沙尘模型
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=E62459D214FD64A3C8082E4ED1ABABED5711027BBBDDD35B&cid=28A2F569B2458C17&jid=46874A5A102033D774D00D819E91CD68&aid=8C43D427EAF7E3A3&yid=A732AF04DDA03BB3&vid=4AD960B5AD2D111A&iid=38B194292C032A66&sid=F204392B3B11C3BD&eid=E3D3D8D1B650AE1E&journal_id=1006-9895&journal_name=大气科学&referenced_num=3&reference_num=41