基于地基遥感和地表原位测量技术研究合肥地区大气温室气体变化特征  

Variation characteristics of atmospheric greenhouse gases in Hefei region based on ground-based remote sensing and in-situ surface measurement

作　　者：查玲玲 谢宇 单昌功 曾祥昱 王薇 ZHA Lingling;XIE Yu;SHAN Changgong;ZENG Xiangyu;WANG Wei(School of Biology,Food and Environment,Hefei University,Hefei 230061,China;Department of Automation,Hefei University,Hefei 230061,China;Key Laboratory of Environment Optics and Technology,Anhui Institute of Optics and Fine Mechanics,HFIPS,Chinese Academy of Sciences,Hefei 230031,China)

机构地区：[1]合肥学院生物食品与环境学院,安徽合肥230061 [2]合肥学院自动化系,安徽合肥230061 [3]中国科学院合肥物质科学研究院安徽光学精密机械研究所,中国科学院环境光学与技术重点实验室,安徽合肥230031

出　　处：《大气与环境光学学报》2024年第4期489-502,共14页Journal of Atmospheric and Environmental Optics

基　　金：国家重点研发计划项目(2022YFB3904805);安徽省教育厅科学研究项目(2022AH051794)。

摘　　要：基于地基傅里叶变换红外遥感和地表原位测量两种观测技术研究了合肥市2016—2017年两年间大气CO_(2)和CH_(4)浓度的变化。观测结果表明:合肥地区大气中CO_(2)和CH_(4)浓度都有着明显的季节变化,其中CO_(2)浓度在2016年8月呈现一个极小值,然后随着时间的推移开始逐渐增加,到2017年4月达到最大值,之后逐渐下降,在2017年9月初又达到另一个极小值;而CH_(4)在夏季和初秋浓度较高,冬季和初春浓度较低。2016年地基遥感测量XCO_(2)和XCH_(4)月均值的季节幅值分别为5.96×10^(-6)和0.047×10^(-6),而原位测量的CO_(2)和CH_(4)浓度月均值的季节幅值分别为31.46×10^(-6)和0.26×10^(-6),约为地基遥感测量对应值的5倍。对合肥站点大气CO_(2)与CO、CH_(4)与CO_(2)分别进行了相关性分析,得到地基遥感测量的秋季XCO_(2)与XCO的相关系数R为0.75,XCO_(2)/XCO的值为79.5,强的相关性说明合肥地区秋季CO_(2)和CO多来自于同一个排放源。另一方面,地表原位测量的冬季CO,与CO、CH_(4)和CO_(2)的相关系数R均为0.80,CO_(2)/CO的值为52.2,CH_(4)/CO_(2)的值为0.0036,气体之间强的相关性说明合肥站点冬季人为排放是CO_(2)的主要来源,并且CH_(4)与CO_(2)部分来源于生物质燃烧。Based on ground-based Fourier transform infrared remote sensing and in-situ surface measurement,the variation of atmospheric CH_(4) and CO_(2) concentrations in Hefei City,China,from January2016 to December 2017 were investigated.The observation results show that there were obvious seasonal variations in CO_(2) and CH_(4) over Hefei.CO_(2) showed a minimum value in August 2016,and then gradually increased over time,reaching the maximum in April 2017.After that,it declined gradually,reaching another minimum value in early September 2017.In contrast,CH_(4) showed high level in summer and early autumn,and low concentrations in winter and early spring.In 2016,the seasonal amplitudes of the monthly mean concentrations of XCO_(2) and XCH_(4) measured by ground-based remote sensing were 5.96 × 10~(-6) and 0.047 ×10~(-6) respectively,while those of CO_(2) and CH_(4) measured in-situ were 31.46 × 10~(-6) and 0.26 × 10~(-6)respectively,about 5 times of the corresponding values measured by ground-based remote sensing.The correlation between atmospheric CO_(2) and CO,as well as CH_(4) and CO_2,at Hefei Station was analyzed.It is shown that the correlation coefficient R between XCO_(2) and XCO measured by ground-based remote sensing in autumn is 0.75,and the ratio of XCO_(2) and XCO is 79.5.The strong correlation between XCO_(2and) XCO indicates that most of CO_(2) and CO in Hefei area in autumn originate from the same sources.On the other hand,the correlation coefficient R of CO_(2) and CO,CH_(4) and CO_(2) measured by in-situ surface measurement in winter is 0.80,the ratio of CO_(2) and CO is 52.2,and the ratio of CH_(4) and CO_(2) is 0.0036.The strong correlations between gases indicate that anthropogenic sources are main sources of CO_(2) at Hefei Station in winter,and CH_(4) and CO_(2) partially originate from biomass burning.

关 键 词：温室气体 地基遥感 原位测量 季节变化 浓度比值 

分 类 号：O436[机械工程—光学工程]