冀中南平原区近地面PM_(2.5)遥感反演  

Remote Sensing Retrieval of Ground-level PM_(2.5) Concentration in Southern-central Hebei Plain

作　　者：王诗瑶 李夫星[1,2] 王晨 赵旭雅[1] 玛伊热·买买提 WANG Shiyao;LI Fuxing;WANG Chen;ZHAO Xuya;MAYIRE Maimaiti(School of Geographical Sciences,Hebei Normal University,Hebei Shijiazhuang 050024,China;Hebei Remote Sensing Technology Identification Innovation Center for Environmental Change,Hebei Shijiazhuang 050024,China)

机构地区：[1]河北师范大学地理科学学院,河北石家庄050024 [2]河北省环境变化遥感技术识别创新中心,河北石家庄050024

出　　处：《河北师范大学学报（自然科学版）》2023年第6期638-648,共11页Journal of Hebei Normal University：Natural Science

基　　金：河北省自然科学基金(D2019205027);河北省教育厅科技项目(QN2018035);河北师范大学博士基金(L2018B20)。

摘　　要：为揭示冀中南平原区近地面PM_(2.5)质量浓度时空变化规律,以空间分辨率为1 km的MAIAC AOD数据为主要估算因子,经AOD补值、垂直校正及湿度校正后,对近地面PM_(2.5)质量浓度进行估算分析.结果表明:MAIAC AOD经缺值修复、垂直校正和湿度校正后,能够显著提升近地面PM_(2.5)质量浓度估算精度及时空覆盖度;冀中南平原区PM_(2.5)年均质量浓度空间分布差异性显著,其中高值区主要分布在以石家庄、定州及保定为中心的太行山山前平原区,低值区主要分布在东部平原区;研究区PM_(2.5)质量浓度存在显著季节性差异,冬季最高,其次为秋季和春季,夏季最低.该研究能得出冀中南平原区时空全覆盖的近地面PM_(2.5)质量浓度估算结果,为该区域与PM_(2.5)污染相关的健康风险及空气质量评价提供了科学依据.To reveal the spatio-temporal variation of ground-level PM_(2.5)concentration in southerncentral Hebei plain(SCHP),MAIAC AOD data with 1km×1km spatial resolution are used as the major estimation factor.A PM_(2.5)estimation model is developed by vertical correction and humidity correction after restoring the missing MAIAC AOD data to estimate and analyze ground-level PM_(2.5)concentration.Results indicate that MAIAC AOD after missing data restoration,vertical correction and humidity correction can significantly improve the accuracy of PM_(2.5)concentration estimation and its spatio-temporal coverage.The spatial distribution of annual mean PM_(2.5)concentration is significantly different in SCHP.The high values are mainly located in the piedmont plain of Taihang mountain centered by Shijiazhuang,Dingzhou and Baoding,while the low values are mainly located in the eastern plain.The PM_(2.5)concentrations indicate significant seasonal variation with the highest concentration in winter,followed by autumn and spring,and the lowest in summer.This study can provide spatio-temporal coverage of ground-level PM_(2.5)concentration estimations for SCHP,and provide scientific basis for PM_(2.5)pollution-related health risks and air quality evaluation in this region.

关 键 词：PM2.5质量浓度 遥感反演 冀中南平原 时空变化规律 

分 类 号：P951[天文地球—自然地理学]