2010-2019年中国CH_(4)时空变化及影响因素分析  

Study on the Temporal and Spatial Variation of CH_(4)and Its Driving Factors over China from 2010 to 2019

作　　者：肖钟湧 林晓凤 高翔 陈颖锋 王翠平 施益强[1,2,3,4] 陈坰烽 刘珊红 谢静晗[1,2,3] XIAO Zhongyong;LIN Xiaofeng;GAO Xiang;CHEN Yingfeng;WANG Cuiping;SHI Yiqiang;CHEN Jiongfeng;LIU Shanhong;XIE Jinghan(College of Harbour and Coastal Engineering,Jimei University,Xiamen 361021,China;Xiamen Key Laboratory of Green and Smart Coastal Engineering,Xiamen 361021,China;National Geographic Conditions Monitoring Research Center,Jimei University,Xiamen 361021,China;Research Center for Coastal Zone Ecological and Environmental Science and Engineering,Jimei University,Xiamen 361021,China)

机构地区：[1]集美大学港口与海岸工程学院,福建厦门361021 [2]厦门市绿色与智慧海岸工程重点实验室,福建厦门361021 [3]集美大学地理国情监测研究中心,福建厦门361021 [4]集美大学海岸带生态环境科学与工程研究中心,福建厦门361021

出　　处：《环境科学与技术》2023年第10期147-155,共9页Environmental Science & Technology

基　　金：集美大学国家基金培育计划项目资助(ZP2021019);福建省自然科学基金计划资助项目(2022J01817);福建省自然科学基金计划资助项目(2021J01839);福建省中青年教师教育科研项目(JAT200282);集美大学科研基金(ZQ2019025)。

摘　　要：该研究利用温室气体观测卫星上的傅里叶变换光谱仪反演的CH_(4)产品,结合瓦里关地面站点观测的CH_(4)浓度数据对遥感产品进行验证和校正,并基于校正后的数据分析了2010-2019年中国CH_(4)时空变化特征及其影响因素。结果表明中国区域CH_(4)柱浓度呈现明显的增长趋势,2010和2019年CH_(4)柱浓度年均值分别为5.43和5.71 mg/m^(3),10年间增长了0.28 mg/m^(3),年均增长率为0.51%。同时,CH_(4)柱浓度呈现12个月的周期变化,且存在明显的时空差异,月均最小和最大值分别出现在2月和9月,多年平均值分别约为(5.50±0.10)和(5.62±0.11)mg/m^(3),差值约为0.12 mg/m^(3),其中2019年2月和9月分别为5.64和5.78 mg/m^(3)。多年平均CH_(4)柱浓度值在5.47~5.68 mg/m^(3)之间变化,高值区主要分布在东部和南部的亚热带地区,2019年年平均最大CH_(4)柱浓度可达5.84 mg/m^(3);最低值区域出现在青海、西藏和新疆交界处,2019年年平均CH_(4)柱浓度约为5.63 mg/m^(3)。从省级行政区尺度来看,江西CH_(4)柱浓度均值最高,2019年约为5.84 mg/m^(3),这主要是水稻种植排放引起的;青海CH_(4)柱浓度均值最低,2019年约为5.64 mg/m^(3)。广西CH_(4)柱浓度的增长量最大,约为0.31 mg/m^(3),增长率为5.6%;黑龙江CH_(4)柱浓度的增长量最小,约为0.27 mg/m^(3),增长率为5.0%。This paper used CH_(4)concentration data observed by the Waliguan station to validate and calibrate CH_(4)products inversed from GOSAT FTS.Based on the validated and corrected remote sensing data,the spatio-temporal variations of CH_(4)column concentration over China and its driving factors from 2009 to 2019 were analyzed.The results showed that the monthly mean value of CH_(4)column concentration appeared gradually increasing and 12 months cyclical variation.The annual regional average CH_(4)column concentration in 2010 and 2019 were 5.43 and 5.71 mg/m^(3),respectively.The CH_(4)increased 0.28 mg/m^(3)(about 5.23%)from 2010 to 2019,and the average annual growth rate was 0.51%.The CH_(4)column concentration appeared obvious temporal and spatial differences.The monthly variation showed a sinusoidal characteristic,the minimum and maximum values appeared in February and September with 5.64 and 5.78 mg/m^(3)in 2019,respectively.The spatial distri⁃bution of CH_(4)column concentration is high in the southeast and low in the northwest.The multi-year(2010-2019)average CH_(4)column concentration value between 5.47 and 5.68 mg/m^(3)in space.The high values of CH_(4)column concentration mainly appeared in the subtropical and temperate regions in the eastern China.The annual average CH_(4)column concentration in 2019 was up to 5.84 mg/m^(3).The lowest value was at the junction of Qinghai,Tibet and Xinjiang with about 5.63 mg/m^(3)in 2019.From the provincial administrative scale,the average CH_(4)column concentration in Jiangxi was the highest,about 5.84 mg/m^(3)in 2019,which was mainly caused by rice planting emissions,and the lowest value was in Qinghai,at about 5.64 mg/m^(3)in 2019.In terms of provincial administrative regions,Guangxi Province has the largest increase in CH_(4)column concentration,which was about 0.31 mg/m^(3),and about 5.6%;Heilongjiang has the smallest increase at about 0.27 mg/m^(3),and the growth rate was about 5.0%.

关 键 词：温室气体观测卫星 CH_(4)柱浓度 卫星遥感 变异系数 

分 类 号：X16[环境科学与工程—环境科学]