华北地区秋冬季气溶胶污染与不同类型降水的关系  

The relationship between aerosol pollution and different precipitation types in autumn and winter in North China

作　　者：肖之盛 缪育聪[2] 朱少斌 于扬 杜晓惠[4] 车慧正[2] XIAO Zhisheng;MIAO Yucong;Zhu Shaobin;YU Yang;DU Xiaohui;CHE Huizheng(School of Atmospheric Physics,Nanjing University of Information Science&Technology,Nanjing 210044,China;State Key Laboratory of Severe Weather,Key Laboratory of Atmospheric Chemistry,Chinese Academy of Meteorological Sciences,Beijing 100081,China;College of Atmospheric Science,Chengdu University of Information Technology,Chengdu 610225,China;Research Institute of Atmospheric Environment,Chinese Research Academy of Environmental Sciences,Beijing 100012,China)

机构地区：[1]南京信息工程大学大气物理学院,南京210044 [2]中国气象科学研究院灾害天气国家重点实验室,中国气象局大气化学重点开放实验室,北京100081 [3]成都信息工程大学大气科学学院,成都610225 [4]中国环境科学研究院大气环境研究所,北京100012

出　　处：《气象学报》2022年第6期986-998,共13页Acta Meteorologica Sinica

基　　金：国家自然科学基金项目(42030608);国家重点研发计划项目(2017YFA0603501)。

摘　　要：气溶胶对降水的影响具有很大的不确定性,正确理解和认识气溶胶对不同类型降水的影响对提高天气预报的准确度和全球气候变化具有重要意义。利用GPM-DPR观测资料和MERRA-2再分析资料分析了气溶胶污染与华北地区2014—2020年秋、冬季对流云降水和层状云降水的关系。结果表明:与清洁状况相比,气溶胶污染状况下对流云降水的降水强度有所增强,雨顶高度更高。在污染状态下对流云降水具有粒径小但数浓度高的降水粒子,潜热加热率更高。气溶胶污染与层状云降水的降水强度、雨顶高度等宏观特征不存在明显相关。层状云降水相比对流云降水更容易受到大气水汽条件和垂直上升运动的影响。因此,在气象条件主导降水的情况下,气溶胶污染对华北地区层状云降水的影响很难通过GPM-DPR和MERRA-2数据观测到。The influence of aerosols on precipitation is largely uncertain, and a correct understanding of the influence of aerosols on different types of precipitation is important for improving the accuracy of weather forecasting and global climate change. The relationship between aerosol pollution and convective precipitation as well as stratiform precipitation in North China in autumn and winter 2014—2020 is analyzed using the GPM-DPR satellite data and MERRA-2 reanalysis data. The results indicate that convective precipitation in the aerosol-polluted condition shows an enhanced rain rate and a higher rain top height compared to that in the clean condition. Convective precipitation in the polluted condition has precipitation particles of smaller size but larger number and higher latent heating rate. There is no significant correlation between aerosol pollution and macroscopic characteristics of stratiform precipitation such as rain rate and rain top height. Stratiform precipitation is more susceptible to atmospheric water vapor condition and upward motion than convective precipitation. Therefore, the effects of aerosol pollution on stratiform precipitation in North China are difficult to be found by GPM-DPR data and MERRA-2 data when the meteorological condition dominates precipitation.

关 键 词：气溶胶 层状云和对流云降水 秋冬季 华北地区 

分 类 号：P426.6[天文地球—大气科学及气象学]