基于激光雷达资料的气溶胶辐射效应研究  

Study on Aerosol Radiative Effect Based on Lidar Data

作　　者：胡向军[1,2] 张镭[2] 郑飞[3] 王腾蛟[2] 

机构地区：[1]兰州中心气象台,甘肃兰州730020 [2]兰州大学大气科学学院,甘肃兰州730000 [3]中国科学院大气物理研究所国际气候与环境科学中心,北京100029

出　　处：《干旱气象》2014年第2期248-255,共8页Journal of Arid Meteorology

基　　金：国家自然科学基金项目(41075104)资助

摘　　要：利用新型激光雷达气溶胶探测资料及综合数值模式,以地形复杂的兰州市及周边地区冬季典型天气形势下的大气边界层为研究对象,通过理想试验模拟研究了城市气溶胶辐射效应与大气边界层的相互作用.结果表明：夜间,低空（50 ～600 m）气溶胶所在气层冷却效应明显,温度降低0. 13 ～0. 18 ℃,600 m 高度以上,气溶胶浓度较低,其冷却效应较小,温度降低不足0. 1 ℃;白天,受气溶胶短波辐射效应影响,边界层内增温明显,增温最大值位于低层脱地逆温层顶300 m 高度附近,600 m 以上由于气溶胶浓度减小,加热率亦降低,增温由〉 0. 2 ℃减至0. 1 ℃.此外,气溶胶的存在使得所在层的风速降低.可见,激光雷达探测资料在边界层模式中有很好的应用价值,对于研究气溶胶辐射效应的大气边界层响应有重要意义.Based on lidar data and a comprehensive numerical model system, the interaction between urban aerosol radiative effect and atmospheric boundatry layer （ABL） under the typical winter weather condition in Lanzhou and surrounding areas with complicated ter- rain was investigated by ideal numerical experiments. The results showed that cooling effect of lower altitude air layer （50 - 600 m） with aerosol was obvious during the night and the temperature reduced 0.13 to 0.18 ℃, but that of atmosphere layer above 600 m height was small because of the lower aerosol concentration and the temperature decreasing was less than 0.1 ℃. The temperature of atmospheric boundatry layer increased obviously due to the aerosol shortwave radiation effects during the day, and there was a peak val- ue above the top of the inversion temperature layer around 300 m near to the surface. Above 600 m height, the increasing temperature was reduced from more than 0.2 to 0.1 ℃ during the day because the aerosol concentration decreased and heating rate correspondingly reduced, in additional, the existence of aerosol reduced the wind speed in the same layer. This paper showed that the lidar data was vetry useful to understand aerosol radiative effect and atmospheric boundatry layer.

关 键 词：WRF模式 气溶胶辐射效应 激光雷达 大气边界层 数值模拟 

分 类 号：P427.1[天文地球—大气科学及气象学]