基于MODIS产品的中国陆地冰云季节变化特征  

Ice Cloud Distribution and Seasonal Migration over Land Area of China Based on MODIS Data

作　　者：李特 郑有飞[1,2,3] 王立稳 林彤 

机构地区：[1]南京信息工程大学大气物理学院,南京210044 [2]江苏省大气环境监测与污染控制高技术研究重点实验室,南京210044 [3]南京信息工程大学江苏省大气环境与装备技术协同创新中心,南京210044

出　　处：《应用气象学报》2017年第6期724-736,共13页Journal of Applied Meteorological Science

基　　金：国家科学自然基金项目(41590873)

摘　　要：利用2011年11月-2016年10月Terra卫星MODIS(moderate-resolution imaging spectroradiometer)3级大气产品数据(MOD08_M3)对中国陆地区域冰云发生概率、有效粒子半径、光学厚度和冰水路径的水平分布与季节变化进行分析。结果表明:冰云特性的水平分布和季节变化特征与东亚季风和强对流天气的发生存在一定联系。近5年冰云发生概率呈上升趋势,季节性变化规律明显,高值区出现在青藏高原东北部;冰云有效粒子水平分布呈现由西南向东北逐渐增加的趋势,总体季节性变化特点不明显,但在纬度较高地区出现随季节变化特征;冰云光学厚度与冰水路径水平分布和季节变化趋势大致相同,呈东南向西北递减趋势,总体季节性变化明显。Ice clouds have an important impact on the global climate, and ice cloud features vary with convection and weather system. Mid-latitude ice clouds originate from the convective cloud system and the atmospheric circulation in the atmosphere, but the understanding on the formation of ice crystals in clouds is still lacking. Non-spherical ice crystal particles have also posed a great challenge to the accurate calculation of the ice cloud in the climate model. Due to limitations of aircraft observation and remote sensing, the observation of ice clouds depends mainly on satellite remote sensing. Based on moderate resolution imaging spectrometer（MODIS） cloud product level-3 data（MOD08M3）, the probability distribution of ice cloud, ice cloud optical thickness, ice cloud effective radius and ice water path over China from November 2011 to October 2016 are analyzed, and the distribution and seasonal migration are discussed. The horizontal distribution and trend of ice cloud attributes in different seasons are studied emphatically. Main conclusions are as follows. The occurrence probability of ice clouds is higher in the northeastern part of the Qinghai-Tibet Plateau during winter, spring and autumn, mainly due to the warm and humid air raised by the northeast slope of the Qinghai-Tibet Plateau. The occurrence probability of ice clouds in low latitudes in summer is related to monsoon and the intertropical convergence zone. The overall occurrence probability of ice clouds is on the rise, especially in the summer of 2016. The horizontal distribution of effective radius of ice cloud is increasing from southwest to northeast, mainly due to the difference of temperature distribution.Through the year, the effective low radius of the ice particles appears in the southwest region, and the high value appears in the northeastern region during the winter, spring and autumn, and appears in Xinjiang area during summer. The ice cloud effective particle radius is larger in high latitudes than in low latitudes, and the overall sea

关 键 词：冰云 发生概率 有效粒子半径 冰水路径 光学厚度 

分 类 号：P426.5[天文地球—大气科学及气象学]