摘要
采用温室气体观测卫星(GOSAT)傅里叶变换光谱仪(FTS)发布的CO_(2)柱浓度L_(3)级别数据集产品,利用TCCON地基站点的CO_(2)柱浓度数据对卫星遥感数据进行验证,分析中国CO_(2)柱浓度时空变化特征及其影响因素。研究结果表明,GOSAT卫星的CO_(2)柱浓度产品精度较高,线性回归的r^(2)为0.99,线性方程斜率为0.98,平均偏差为0.11 mg/L。中国CO_(2)柱浓度呈现逐年增长的趋势,存在12个月的周期性季节性变化。2010、2020年区域年平均CO_(2)柱浓度分别约为389.30、412.62 mg/L,增长了23.32 mg/L,年平均增长率大约为0.58%。中国区域大气CO_(2)柱浓度的月变化存在明显的时空差异,最大值和最小值分别出现在4月和8月,2020年4月和8月的区域平均值分别为415.09、409.13 mg/L。中国区域CO_(2)柱浓度从东部沿海向西部逐级递减,且呈现明显的季节性变化,夏季高值主要集中在东南部沿海地区,冬季高值主要集中在华北地区。
The CO_(2) column concentration L_(3) data set product released by the Fourier Transform Spectrometer(FTS)of the greenhouse gas observation satellite(GOSAT)was used.The satellite remote sensing data were verified by using the CO_(2) column concentration data observed by the ground-based observation of TCCON.The temporal and spatial variation characteristics of CO_(2) column concentration in China and the influencing factors were analyzed.The results showed that the CO_(2) column concentration data set of GOSAT satellite had high accuracy.The r^(2) of linear regression was 0.99,and the slope of linear equation was 0.98,and the average deviation was 0.11 mg/L.The CO_(2) column concentration in China was increasing year by year with a periodic seasonal variation of 12 months.The regional average annual CO_(2) column concentration in 2010 and 2020 was about 389.30 and 412.62 mg/L,respectively.During this period,the CO_(2) column concentration increased by 23.32 mg/L and the average annual growth rate was about 0.58%.The monthly variation of atmospheric CO_(2) column concentration in China had obvious temporal and spatial differences.The maximum and minimum appeared in April and August respectively.The multi-yearly regional average in April and August were 415.09 and 409.13 mg/L in 2020.The spatial distribution of CO_(2) column concentration decreased gradually from the eastern coast to the western China with obvious seasonal variation.The summer high value was mainly concentrated in the southeast coast,and the winter high value was mainly concentrated in northern China.
作者
葛钰洁
肖钟湧
GE Yujie;XIAO Zhongyong(College of Harbour and Coastal Engineering,Jimei University,Xiamen 361021,China;College of Earth and Environmental Sciences,Lanzhou University,Lanzhou 730000,China)
出处
《中国环境监测》
CAS
CSCD
北大核心
2022年第5期96-108,共13页
Environmental Monitoring in China
基金
集美大学国家基金培育计划项目资助项目(ZP2021019)
福建省自然科学基金计划资助项目(2021J01839)。
