华东地区气溶胶分布和变化特征研究  

A Study of the Characteristics of Aerosol Distribution and Variation in Eastern China

作　　者：刘璇[1,2] 朱彬[3] 关学锋[1,2] 刘慧敏[4] 袁亮[3] LIU Xuan;ZHU Bin;GUAN Xuefeng;LIU Huimin;YUAN Liang(Institute of Desert Meteorology,China Meteorological Administration,Urumqi 830002,China;Center for Central Asian Atmosphere Science Research,Urumqi 830002,China;Key Laboratory of Meteorological Disaster,Ministry of Education,Joint International Research Laboratory of Climate and Environment Change,Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters,Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological A;Baiyin Meteorological Bureau,Baiyin 730900,China)

机构地区：[1]中国气象局乌鲁木齐沙漠气象研究所,新疆乌鲁木齐830002 [2]中亚大气科学研究中心,新疆乌鲁木齐830002 [3]南京信息工程大学气象灾害教育部重点实验室,气候与环境变化国际合作联合实验室,气象灾害预报预警与评估协同创新中心,中国气象局气溶胶与云降水重点开放实验室,江苏南京210044 [4]白银市气象局,甘肃白银730900

出　　处：《沙漠与绿洲气象》2017年第1期11-21,共11页Desert and Oasis Meteorology

基　　金：中亚大气科学研究基金项目(CASS201708);自治区区域协同创新项目(2016e02104);国家自然科学基金项目(91544229)资助

摘　　要：利用中分辨率光谱仪(MODIS)获得的气溶胶光学厚度(AOD)、细粒子比例(FMF)和臭氧检测仪(OMI)获得的气溶胶指数(AI)统计分析了2005—2014年我国华东地区气溶胶光学性质的时空分布特征,同时利用潜在源分析(PSCF)模型对我国华东地区AOD和AI的潜在源区进行分析。研究结果表明:华东地区的AOD、FMF和AI时空分布存在较大的差异,2005—2014年AOD和AI的平均值高值主要分布在华东地区北部,FMF的高值区则分布在华东南部地区;10 a间华东地区AOD呈现出先升高后降低的趋势,FMF波动幅度不明显,AI值有所上升;整个华东地区AOD的季节变化较为明显,春夏两季AOD明显高于秋冬两季。华东北部和中部地区夏季由于较高的相对湿度,AOD最大可达0.8以上。而在华东南部地区,夏季受到降水的影响,AOD维持在0.2~0.4之间。FMF季节变化趋势与AOD不同,夏季最大达到0.58,春季最小仅为0.26。AI平均值在冬季最大高达0.63,夏季最小,为0.27。PSCF分析显示华东地区AOD主要源区以局地排放为主,同时也存在由河南、湖北和湖南等周边省市近距离输送影响;AI以局地和北方远距离输送为主,同时也受到河南、湖北等周边省市近距离输送的影响。The characteristics of spatial and temporal distributions of aerosol optical depth(AOD),fine mode fraction(FMF)and aerosol index(AI)during2005-2014in Eastern China wereanalyzed based on the aerosol products of Moderate Resolution Imaging Spectroradiometer(MODIS)and Ozone Monitoring Instrument(OMI).The method of potential source contribution function(PSCF)was applied to find the possible sources of AOD and AI in this region under different airmass conditions.The results showed that there was a relative large discrepancy existing in thespatial and temporal distributions of AOD,FMF and AI.The high value of the average AOD and AIduring2005-2014distributed in the northern area of Eastern China.However,the high value of theaverage FMF spread across the southern part of Eastern China.AOD in this period firstly increasedand then decreased,and the fluctuation of FMF was not obvious while AI presented a rising trend.There was a significant seasonal variation in AOD in eastern China.The average values of AOD inspring and summer were obviously higher than that in autumn and winter.In the northern andcentral regions of Eastern China,AOD reached the maximum of above0.8in summer due to the high relative humidity.However,AOD value of the southern region of Eastern China was between0.2and0.4because of the high-frequency precipitation in summer.Different from AOD seasonalvariation,FMF of0.58was highest in summer,and its lowest value of0.26appeared in spring.While the average value of AI(0.63)was the largest in winter,and the lowest value of0.27appeared in summer.The result of PSCF showed that local emission was the dominate source ofAOD,and the short distance transport of aerosols from Henan,Hubei,Hunan and so on could alsoaffect AOD in Eastern China.Local emission and long-range transport from the north were the mainsources of AI,and there was also influence coming from short distance transport of aerosols fromHenan,Hubei and the surrounding provinces and cities.

关 键 词：气溶胶光学厚度(AOD) 细粒子比例(FMF) 气溶胶指数(AI) 潜在源分析(PSCF) 

分 类 号：P402[天文地球—大气物理学与大气环境]