气象学报2025，Vol.83Issue(2)：403-417,15.DOI:10.11676/qxxb2025.20240067
中国中东部区域本底站气溶胶质量浓度观测空间代表性评估
Assessing the spatial representativeness of aerosol mass concentration observations at regional background stations in central and eastern China
摘要
Abstract
The spatial representativeness(SR)of aerosol mass concentration observations collected at regional background stations in central and eastern China is assessed using the PM2.5 product from 2010 to 2021,which is extracted from a series of high-resolution and high-quality datasets of ground-level air pollutants over China.The quality and reliability of the dataset are evaluated using observations at the background stations.Specifically,the SR of PM2.5 at Jinsha(JSA),Lin'an(LAN),Shangdianzi(SDZ)and Longfengshan(LFS)regional background stations in central and eastern China are assessed.The Concentration Similarity Function(CSF)is applied to calculate the average,the intersection/common and the persistence indexes of the SR area at the four stations and the 12-year study period is divided into three continuous stages(2010-2013,2014-2017,2018-2021).Main conclusions are as follows.(1)With the mass concentration relative difference threshold 20%,LFS station has the largest average SR area of 22378 km2,followed by JSA(14490 km2),and LAN(9841 km2)and SDZ(7998 km2)using daily average PM2.5 product.As for the intersection/common SR area,LFS station has the largest area(18378 km2),followed by JSA(11915 km2),while SDZ station(5687 km2)and LAN(5476 km2)have relatively small areas.The persistence index of the SR area at JSA and LFS is larger than that at LAN and SDZ.The SR area during 2018-2021 is larger than that during 2014-2017 at the four regional background stations.(2)For the average(intersection/common)area to satisfy the SR area for the air quality regional background stations specified by the Ministry of Ecology and Environment,the People's Republic of China(i.e.with the radius of 100 km),mass concentration relative difference threshold at the four stations should be≥40%adopting the daily PM2.5 product.(3)The average,the intersection/common,and the persistence indexes of the SR area assessed adopting annual average PM2.5 mass concentrations are all larger or better than those assessed adopting daily average PM2.5 mass concentrations.关键词
PM2.5/空间代表性/区域本底站Key words
PM2.5/Spatial representativeness/Regional background station分类
资源环境引用本文复制引用
王蒙,高丽娜,颜鹏,荆俊山,叶金印,李学行,韦晶..中国中东部区域本底站气溶胶质量浓度观测空间代表性评估[J].气象学报,2025,83(2):403-417,15.基金项目
重大自然灾害预警与防范专项项目(2017YFC1501702)、中国气象局创新发展专项(CXFZ2023J066)、国家自然科学基金青年项目(41705133). （2017YFC1501702）
