摘要
以海西区沿海城市为研究对象,重点分析了厦门地区2017年春季大气颗粒物污染过程中边界层要素演变及颗粒物水平和垂直分布特征,并利用地面观测数据、气溶胶激光雷达、卫星遥感分析等多源观测资料,探讨了3月1—2日颗粒物污染过程.研究表明,海西区颗粒物污染过程中,暖区条件下静稳小风和高温高湿条件有利于局地细颗粒物的吸湿增长,细颗粒物占比较高,而在受冷锋南下影响下东北大风和高湿条件下,粗颗粒占比较高;海西区沿海各城市的细颗粒污染趋势基本一致,而粗颗粒污染峰值在沿海城市由北向南依次出现,表现出显著的向南传输的特征;海西区细颗粒污染主要集中在近地面层,受人为源排放累积影响,粗颗粒则是由外源输入,并沉降至近地面附近;冷空气南下过程中,在由锋前暖区的静稳条件向冷锋过境转变时,气溶胶污染由局地累积向区域传输转变,颗粒物尺度也从细颗粒物转变为粗颗粒物.海西区空气总体较为清洁,在污染相对较小条件下,颗粒物污染是通过多来源、多尺度的污染物造成的,是受细颗粒局地源产生和输送及外源粗颗粒物的输入和沉降共同影响的.
In this study focusing on the particular matter（ PM） pollution in spring 2017 over the West Bank of Taiwan Strait（ WBTS）,especially in Xiamen,we analyzed the horizontal and vertical distribution characterize of PM and other elements in boundary layer by using surface meteorological and environmental data,aerosol radar,aerosol models and satellite remote sensing data. The results indicated that fine particle showed relatively high proportion caused by weakly wind and relatively high temperature in warm period,which was advantaged for local hygroscopic growth,whereas the coarse pollution appeared under strong northern wind in period of cold front that moving southward during aerosol pollution in WBTS. The fine particle pollution showed same trend of variations over coastal cities in WBTS,but the coarse particle peak over cities of WBTS appeared in turns from north to south,indicated a long distance transport of PM over East China. Analyze vertical varying of extinction coefficient and depolarization by using aerosol radar data,the fine particle pollution was accumulated in lower boundary layer produced from local anthropogenic emission. External coarse particle was transported into WBTS from the Yangtze River Delta or the North China Plain before subsided to ground. In summary,the transformation processes from fine particle pollution to coarse particle pollution or from local accumulation to regional transport were due to the change of weather situation of the cold front and the warm period before cold front. As the WBTS＇s air quality was well over East China,PM pollution formatted by multi-source and multi-scale pollutants in this area that were influenced by both local accumulation and regional transport.
作者
蒋永成
郑辉
蒋宗孝
陈赛
陈德花
赵天良
王宏
黄艳艳
胡清华
赵丽娟
张玲
JIANG Yongcheng;ZHENG Hui;JIANG Zongxiao;CHEN SaiI;CHEN Dehua;ZHAO Tianliang;WANG Hong;HUANG Yanyan;HU Qinghua;ZHAO Lijuan;ZHANG Ling(Laboratory of Strait Meteorology, Xiamen Meteorological Observatory, Xiamen Meteorological Bureau, Xiamen 361012;Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Joint International Research Laboratory of Climate and Environment Change, Key Laboratory of Meteorological Disaster, Ministry of Education, Nanjing University of Information Science ＆ Technology, Nanjing 210044;Zhangzhou Meteorological Bureau, Zhangzhou 363000)
出处
《环境科学学报》
CAS
CSCD
北大核心
2018年第5期1739-1750,共12页
Acta Scientiae Circumstantiae
基金
国家自然科学基金(No.41705045)
福建省自然科学基金(No.2016J01182)
厦门市科技惠民项目(No.3502Z20164083)
中国气象局预报员专项(No.CMAYBY2017-036)
厦门市气象局科学研究基金(No.2017xmky06)~~
关键词
颗粒物污染
海峡西岸地区
气溶胶激光雷达
气象条件
区域传输
particle matter pollution
West Bank of Taiwan Strait
aerosol radar
meteorological condition
regional transport
