干旱气象

• 论文 • 上一篇    下一篇

基于激光雷达资料的气溶胶辐射效应研究

胡向军1,2张镭2郑飞3王腾蛟2   

  1. 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
  • 出版日期:2014-04-18 发布日期:2014-04-18
  • 作者简介:胡向军(1978 - ),男,理学硕士,主要从事大气物理、天气预报研究. E - mail:xiangjunhu@126. com
  • 基金资助:

    国家自然科学基金项目(41075104)资助

Study on Aerosol Radiative Effect Based on Lidar Data

HU Xiangjun1,2ZHANG Lei2ZHENG Fei3WANG Tengjiao2   

  1. 1. Lanzhou Central Meteorological Observatory,Lanzhou 730020,China;
    2. College of Atmospheric Sciences,Lanzhou University,Lanzhou 730000,China;
    3. International Center for Climate and Environment Science (ICCES),Institute of Atmospheric Physics,Chinese Academy of Sciences,Beijing 100029,China
  • Online:2014-04-18 Published:2014-04-18

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。

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

Abstract:

Based on lidar data and a comprehensive numerical model system,the interaction between urban aerosol radiative effect and
atmospheric boundary 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 boundary 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
very useful to understand aerosol radiative effect and atmospheric boundary layer.

Key words: WRF model, aerosol radiative effect, lidar, ABL, numerical simulation

中图分类号: