气候变化领域集成服务门户(CCPortal): Regional and Urban Column CO Trends and Anomalies as Observed by MOPITT Over 16 Years

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DOI	10.1029/2020JD033967
	Regional and Urban Column CO Trends and Anomalies as Observed by MOPITT Over 16 Years
	Hedelius J.K.; Toon G.C.; Buchholz R.R.; Iraci L.T.; Podolske J.R.; Roehl C.M.; Wennberg P.O.; Worden H.M.; Wunch D.
发表日期	2021
ISSN	2169897X
卷号	126 期号:5
英文摘要	Atmospheric carbon monoxide (CO) concentrations have decreased since the beginning of the century, and the rate of decrease depends on the region. Depending on how regions are chosen, their boundaries may not always align with where there are differences in trends. To address this, we calculate trends within 0.4° × 0.4° grid cells independently throughout the globe using satellite CO retrievals from the Measurements Of Pollution In The Troposphere (MOPITT) satellite instrument from 2002 to 2017. These trends are found with the caveat that there are large singular biomass burning events somewhere nearly every year, and we include examples of large column CO anomalies during sporadic but large burning events in the North American and Eurasian boreal forests, the Amazon, Africa, and Indonesia. CO trends behave similarly within regions that span about a few thousand kilometers. Using TransCom region definitions, we find average trends between −0.9 and 0.1 ppb year−1 (about −0.9 to 0.1% year−1) for 2002–2017. Over 5-year subsets, trends in TransCom regions vary between −3.6 and 1.8 ppb year−1. This substantial spatial and temporal variability in trends is in agreement with other studies. With an understanding of regional trends, we compare with trends from urban areas. Generally, CO trends within urban areas are indistinguishable from regional trends. This may be because of a combination of noise in the data, the large footprint for MOPITT, or because anthropogenic CO reduction measures were implemented before the MOPITT record began. We provide case studies for a few cities, such as Los Angeles, and find long-term variation in the rate of change of column CO. © 2021. American Geophysical Union. All Rights Reserved.
英文关键词	anthropogenic emissions; biomass burning; carbon monoxide; MOPITT; regional atmospheric trends; TCCON
语种	英语
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/185420
作者单位	Department of Physics, University of Toronto, Toronto, ON, Canada; Space Dynamics Laboratory, Utah State University, North Logan, UT, United States; Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States; Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA, United States; Atmospheric Chemistry Observations and Modeling, National Center for Atmospheric Research, Boulder, CO, United States; NASA Ames Research Center, Mountain View, CA, United States; Division of Engineering and Applied Science, California Institute of Technology, Pasadena, CA, United States
推荐引用方式 GB/T 7714	Hedelius J.K.,Toon G.C.,Buchholz R.R.,et al. Regional and Urban Column CO Trends and Anomalies as Observed by MOPITT Over 16 Years[J],2021,126(5).
APA	Hedelius J.K..,Toon G.C..,Buchholz R.R..,Iraci L.T..,Podolske J.R..,...&Wunch D..(2021).Regional and Urban Column CO Trends and Anomalies as Observed by MOPITT Over 16 Years.Journal of Geophysical Research: Atmospheres,126(5).
MLA	Hedelius J.K.,et al."Regional and Urban Column CO Trends and Anomalies as Observed by MOPITT Over 16 Years".Journal of Geophysical Research: Atmospheres 126.5(2021).