大气环境变化中大气颗粒物PM_1的重要作用——关中平原MODIS气溶胶产品的气候分析  

The important role of PM_1 in changes of atmospheric environment: climatic analysis of MODIS aerosol products in Guanzhong Plain

作　　者：彭玥[1] 赵天良[1] 郑小波 王宏[3] 银燕[1] 廖瑶 朱珊莹[1] PENG Yue;ZHAO Tian-liang;ZHENG Xiao-bo;WANG Hong;YIN Yan;LIAO Yao;ZHU Shan-ying(Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Nanjing University of Information Science and Technology, Nanjing 210044, China;Guizhou Institute of Mountainous Climate and Environment, Guiyang 550002, China;Institute of Atmospheric Composition, Chinese Academy of Meteorological Sciences, Beijing 100081, China)

机构地区：[1]南京信息工程大学中国气象局气溶胶-云-降水重点实验室,江苏南京210044 [2]贵州山地环境气候研究所,贵州贵阳550002 [3]中国气象科学研究院大气成分研究所,北京100081

出　　处：《中国环境科学》2017年第7期2443-2449,共7页China Environmental Science

基　　金：国家重点研发计划"大气污染成因与控制技术研究"试点专项项目(2016YFC0203304);国家自然科学基金培育项目(91544109);科技部973项目(2014CB441201)

摘　　要：利用MODIS 3km气溶胶产品中的气溶胶光学厚度(AOD)和细粒子比例(FMF),本文对关中平原气溶胶近15a的时空变化进行了气候分析,揭示了大气环境变化中大气颗粒物PM1的重要作用.结果表明,关中平原为AOD高值区和FMF低值区.其中,最大值AOD出现在西安及周边地区高达1.06,而FMF主要集中在0.3以下较低水平.伴随关中平原近几年大气气溶胶水平的降低,PM1比重却逐年上升.关中平原AOD年际变化在2001~2011年间为显著上升趋势,2011~2015年间则呈下降趋势;而2001~2015年之间FMF的年际变化呈现持续上升趋势,反映了逐年加重的人为气溶胶对大气环境的影响.近15a关中地区AOD与FMF区域变化的相互关系表明,大气气溶胶低水平(AOD<0.5)时,伴随FMF上升,AOD显著减小;气溶胶较高水平(AOD>0.5)时,AOD随FMF上升而增大.这表明大气颗粒物PM1对区域清洁和污染大气环境变化均具有显著作用.The temporal and spatial changes of aerosols over Guanzhong Plain in15years were climatologically analyzed in this paper,by using MODIS3km aerosol products including AOD(aerosol optical depth)and FMF(fine mode fraction).The results showed that Guanzhong Plain was an area with high AOD and low FMF.The highest value of AOD existed in Xi'an and the surrounding areas up to1.06while FMF was under0.3there.With the decreases in atmospheric aerosol levels over Guanzhong Plain in recent years,the proportion of the PM1increased year by year.During2001~2011,AOD values increased significantly and then became decreasing in most areas of Guanzhong Plain over recent5years.Meanwhile,FMF values showed a sustaining upward trend from2001to2015,reflecting the influence of increasing anthropogenic aerosols on atmospheric environment.The relationship between15-year averages of AOD and FMF over Guanzhong Plain presented that when atmospheric aerosol level was low(AOD<0.5),AOD decreased with the increasing FMF,and when atmospheric aerosol level was high(AOD>0.5),AOD increased with the increasing FMF,indicating that atmospheric particles PM1contributed greatly to atmospheric environment changes both in clean and polluted regions.

关 键 词：MODIS 气溶胶光学厚度 细粒子比例 关中平原 大气环境变化 

分 类 号：X513[环境科学与工程—环境工程] X87