卫星遥感的山西HCHO柱浓度长期变化趋势  

Long-term trends of HCHO columns in Shanxi Province based on satellite remote sensing

作　　者：杨爱琴 于小红 陈玲 闫世明 朱凌云 郭伟[1,2] 李明明 李雁宇 李莹 贺洁颖 YANG Ai-qin;YU Xiao-hong;CHEN Ling;YAN Shi-ming;ZHU Ling-yun;GUO Wei;LI Ming-ming;LI Yan-yu;LI Ying;HE Jie-ying(Monitoring&Assessment Center For GHG&Carbon Neutrality,Shanxi Branch,Shanxi Institute of Meteorological Science,Taiyuan 030002,China;Wutaishan Cloud Physics Field Experiment Base,China Meteorological Administration,Taiyuan 030002,China;School of Earth and Planetary Sciences,University of Chinese Academy of Sciences,Beijing 100049,China;Institute of Atmospheric Physics,Chinese Academy of Sciences,Beijing 100029,China;Faculty of Geographical Science,Beijing Normal University,Beijing 100875,China)

机构地区：[1]山西省气象科学研究所,中国气象局温室气体及碳中和监测评估中心山西分中心,山西太原030002 [2]中国气象局五台山云物理野外科学试验基地,山西太原030002 [3]中国科学院大学地球与行星学院,北京100049 [4]中国科学院大气物理研究所,北京100029 [5]北京师范大学地理科学学部,北京100875

出　　处：《中国环境科学》2024年第12期6608-6616,共9页China Environmental Science

基　　金：中国气象局创新发展专项(CXFZ2024P003);山西省基础研究计划青年科学研究项目(20210302124202,202203021222423);山西省气象局项目(SXKMSDW20226309,SXKMSDW20226325,SXKZDDW20246759)。

摘　　要：利用臭氧检测仪(OMI)HCHO柱浓度数据及其他辅助数据,研究了2013~2022年5~8月去除气温影响的山西HCHO柱浓度长期变化趋势,以及天然源VOCs(BVOCs)和人为源VOCs(AVOCs)排放的变化在HCHO柱浓度变化中的作用.结果表明,研究时段山西HCHO柱浓度均值介于4.1×10^(15)~53.6×10^(15)molecule/cm^(2)之间,年均14.3×10^(15)molecule/cm^(2),2013~2018年呈上升趋势,2019~2022年波动下降,HCHO柱浓度乡村普遍高于城市.去除气温影响后,相较于2013~2017年,2018~2022年HCHO柱浓度下降区多位于人类活动密集的城镇,上升区多分布于受人为活动影响较小的乡村.在HCHO柱浓度受气温显著影响区域中,大同北部HCHO柱浓度上升与农用地的BVOCs排放增加有关;忻州西部-吕梁北部HCHO柱浓度上升与农用地、稠密灌木、混交林、稀树草原的BVOCs排放增加有关;晋中中部和临汾南部-运城北部HCHO柱浓度的下降,是AVOCs和BVOCs排放共同下降的结果,并且AVOCs减排有重要作用.The long-term trends of formaldehyde(HCHO) column in Shanxi Province from May to August over the period 2013~2022 were analyzed,using satellite measurements from Ozone Monitoring Instrument(OMI) and auxiliary data.The research examines the influence of biogenic volatile organic compounds(BVOCs) and anthropogenic volatile organic compounds(AVOCs)emissions on the observed variations in HCHO levels.Results indicate that the average HCHO column ranged from 4.1×1015 to 53.6×1015 molecules/cm^(2),with an annual mean of 14.3 × 1015 molecules/cm^(2).From 2013 to 2018,HCHO column exhibited an increasing trend,followed by a fluctuating decline from 2019 to 2022.Rural areas consistently showed higher HCHO concentrations compared to urban regions.After removing temperature effects,decreases in HCHO concentrations were observed mostly in urban areas with intense human activities,while increases were observed in rural villages with minimal anthropogenic influence.In temperature-sensitive regions,the rise in HCHO concentrations in northern Datong was attributed to increased BVOCs emissions from croplands.Similarly,in western Xinzhou to northern Lüliang,elevated HCHO concentrations were linked to higher BVOCs emissions from croplands,dense shrublands,mixed forests,and savannas.Conversely,central Jinzhong and southern Linfen to northern Yuncheng experienced reductions in HCHO concentrations due to simultaneous decreases in both AVOCs and BVOCs emissions,with reductions in AVOCs playing a particularly significant role.

关 键 词：甲醛(HCHO)柱浓度 挥发性有机物(VOCs) 卫星遥感 山西 气温 土地覆盖 

分 类 号：X511[环境科学与工程—环境工程]