浑善达克沙地沙尘气溶胶的辐射强迫  

Radiation Forcing of Dust Aerosol from Hunshan Dake Sandland in China

作　　者：成天涛[1] 吕达仁[2] 徐永福[3] 

机构地区：[1]复旦大学环境科学与工程系,上海200433 [2]中国科学院大气物理研究所LAGEO,北京100029 [3]中国科学院大气物理研究所大气边界层物理与大气化学国家重点实验室室,北京100029

出　　处：《高原气象》2005年第6期920-926,共7页Plateau Meteorology

基　　金：国家自然科学基金项目(49790020);大气边界层物理和大气化学国家重点实验室开放课题(LAPC-KF-2004-15)共同资助

摘　　要：利用2001年春季浑善达克沙地外场观测的辐射资料及大气辐射模式,对沙尘气溶胶的局地辐射强迫进行了分析和模拟估算。计算结果表明,浑善达克沙地大气透过率日变化显著,晴天可达0.80以上,沙尘天气最低在0.01以下;白天沙尘的辐射强迫对地表有冷却作用,夜间起保温作用。观测期间,平均大气透过率为0.6,白天沙尘对地面向下长波辐射的平均强迫增加量为16.76 W.m-2,对地面净辐射能收支的平均强迫减少量为62.76 W.m-2;夜间地表长波辐射净损失量因沙尘作用减少,平均为67.84 W.m-2。The observation data of radiation on surface in spring 2001 and atmospheric radiative transferring model were employed to estimate the radiation forcing of dust aerosol over Hunshan Kake Sandland in China. The results showed that the daily change of atmospheric transmissivity was great, it was above 0. 80 in fair day and below 0.01 in dusty day. Comparing with fair day, the radiation forcing of dust aerosol in dusty day caused atmospheric temperature decreasing in day time and increasing at night. In spring of 2001, the mean atmospheric transmissivity was 0.6, the mean long-wave radiation forcing by dust aerosol on surface was 16.76 W · m^-2 , the mean long-wave radiation balance forcing by dust aerosol on surface was 62.76 W·m^-2.

关 键 词：浑善达克沙地 沙尘气溶胶 辐射强迫 大气辐射 

分 类 号：P445.4[天文地球—大气科学及气象学]