气候变化领域集成服务门户(CCPortal): Discrepancy in assimilated atmospheric CO over East Asia in 2015-2020 by assimilating satellite and surface CO measurements

CCPortal

DOI	10.5194/acp-22-7815-2022
	Discrepancy in assimilated atmospheric CO over East Asia in 2015-2020 by assimilating satellite and surface CO measurements
	Tang, Zhaojun; Chen, Jiaqi; Jiang, Zhe
发表日期	2022
ISSN	1680-7316
EISSN	1680-7324
起始页码	7815
结束页码	7826
卷号	22 期号:11 页码:12
英文摘要	Satellite and surface carbon monoxide (CO) observations have been widely used to investigate the sources and variabilities of atmospheric CO. However, comparative analyses to explore the effects of satellite and surface measurements on atmospheric CO assimilations are still lacking. Here we investigate the assimilated atmospheric CO over East Asia in 2015-2020, via assimilating CO measurements from the Measurement of Pollution in the Troposphere (MOPITT) instrument and Ministry of Ecology and Environment of China (MEE) monitoring network. We find noticeable inconsistencies in the assimilations: the adjusted CO columns (Xco) are about 162, 173 and 172 ppb by assimilating surface CO measurements, in contrast to 138-144, 149-155 and 144-151 ppb by assimilating MOPITT CO observations over East China, the North China Plain (NCP), and the Yangtze River Delta (YRD), respectively. These inconsistencies could be associated with possible representation errors due to differences between urban and regional CO backgrounds. Furthermore, the adjusted surface CO concentrations are about 631, 806, and 657 ppb by assimilating surface CO measurements, in contrast to 418-427, 627-639 and 500-509 ppb by assimilating MOPITT CO observations over East China, NCP, and YRD, respectively; assimilations of normalized surface CO measurements (to mitigate the influences of representation errors) indicate declines of CO columns by about 2.2, 2.1, and 1.8 ppb yr(-1), in contrast to 0.63-0.86, 0.97-1.29, and 1.0-1.27 ppb yr(-1) by assimilating MOPITT CO measurements over East China, South Korea, and Japan, respectively. These discrepancies reflect the different vertical sensitivities of satellite and surface observations in the lower and free troposphere. This work demonstrates the importance of integrating information from satellite and surface measurements to provide a more accurate evaluation of atmospheric CO changes.
学科领域	Environmental Sciences; Meteorology & Atmospheric Sciences
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000811532600001
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/272994
作者单位	Chinese Academy of Sciences; University of Science & Technology of China, CAS
推荐引用方式 GB/T 7714	Tang, Zhaojun,Chen, Jiaqi,Jiang, Zhe. Discrepancy in assimilated atmospheric CO over East Asia in 2015-2020 by assimilating satellite and surface CO measurements[J],2022,22(11):12.
APA	Tang, Zhaojun,Chen, Jiaqi,&Jiang, Zhe.(2022).Discrepancy in assimilated atmospheric CO over East Asia in 2015-2020 by assimilating satellite and surface CO measurements.ATMOSPHERIC CHEMISTRY AND PHYSICS,22(11),12.
MLA	Tang, Zhaojun,et al."Discrepancy in assimilated atmospheric CO over East Asia in 2015-2020 by assimilating satellite and surface CO measurements".ATMOSPHERIC CHEMISTRY AND PHYSICS 22.11(2022):12.