摘要
利用耦合了起沙模型(MEDM)的区域气候模式RegCM3,模拟研究了2000年春季中国地区沙尘气溶胶短波辐射气候效应。结果表明,春季中国沙尘气溶胶垂直负荷的大值区主要位于南疆盆地和阿拉善高原。引入沙尘气溶胶后,中国地区地表均出现负的辐射强迫,地面气温普遍降低,中低层(400 hPa层以下)大气温度则呈上升趋势。沙尘源区及其下游地区总云量及降水主要呈减少趋势,云量与降水的分布特征与空中流场的变化趋势一致性较好。
The regional climate model（RegCM3） coupled with the modified dust emission scheme（MDEM） is used to simulate the radiative forcing effect in spring of China.The preliminary simulation results show that large vertical burden regions of dust aerosol in spring are located in the Tarim basin and the plateau of ALxa.Due to the introduction of dust aerosol,the ground radiative forcing present negative,and the ground temperature generally decreases,but the air temperature below 400 hPa level presents ascent tendency.The total cloud fraction and precipitation of soil-derived region and the downstream areas present decrease tendency,and their spatial characteristics are consistent with the stream field.
出处
《气象与减灾研究》
2010年第4期23-30,共8页
Meteorology and Disaster Reduction Research
基金
国家重点基础研究发展规划(编号:2006CB400505)
国家自然科学基金项目(编号:40675040)
关键词
区域气候模式
沙尘气溶胶
辐射强迫
Regional climate model
Dust aerosol
Radiative forcing.
