气候变化领域集成服务门户(CCPortal): Mapping hydroxyl variability throughout the global remote troposphere via synthesis of airborne and satellite formaldehyde observations

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DOI	10.1073/pnas.1821661116
	Mapping hydroxyl variability throughout the global remote troposphere via synthesis of airborne and satellite formaldehyde observations
	Wolfe G.M.; Nicely J.M.; Clair J.M.S.; Hanisco T.F.; Liao J.; Oman L.D.; Brune W.B.; Miller D.; Thames A.; Abad G.G.; Ryerson T.B.; Thompson C.R.; Peischl J.; McCain K.; Sweeney C.; Wennberg P.O.; Kim M.; Crounse J.D.; Hall S.R.; Ullmann K.; Diskin G.; Bui P.; Chang C.; Dean-Day J.
发表日期	2019
ISSN	0027-8424
起始页码	11171
结束页码	11180
卷号	166 期号:23
英文摘要	The hydroxyl radical (OH) fuels tropospheric ozone production and governs the lifetime of methane and many other gases. Existing methods to quantify global OH are limited to annual and global-to-hemispheric averages. Finer resolution is essential for isolating model deficiencies and building process-level understanding. In situ observations from the Atmospheric Tomography (ATom) mission demonstrate that remote tropospheric OH is tightly coupled to the production and loss of formaldehyde (HCHO), a major hydrocarbon oxidation product. Synthesis of this relationship with satellite-based HCHO retrievals and model-derived HCHO loss frequencies yields a map of total-column OH abundance throughout the remote troposphere (up to 70% of tropospheric mass) over the first two ATom missions (August 2016 and February 2017). This dataset offers unique insights on near-global oxidizing capacity. OH exhibits significant seasonality within individual hemispheres, but the domain mean concentration is nearly identical for both seasons (1.03 ± 0.25 × 106 cm−3), and the biseasonal average North/South Hemisphere ratio is 0.89 ± 0.06, consistent with a balance of OH sources and sinks across the remote troposphere. Regional phenomena are also highlighted, such as a 10-fold OH depression in the Tropical West Pacific and enhancements in the East Pacific and South Atlantic. This method is complementary to budget-based global OH constraints and can help elucidate the spatial and temporal variability of OH production and methane loss. © 2019 National Academy of Sciences. All rights reserved.
英文关键词	ATom; Formaldehyde; Hydroxyl; OMI; Troposphere
语种	英语
scopus关键词	formaldehyde; hydroxyl group; methane; Article; atmosphere; chemical analysis; chemical parameters; concentration (parameter); data base; environmental parameters; oxidation; phenomenology; priority journal; satellite imagery; synthesis; troposphere
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/160365
作者单位	Wolfe, G.M., Joint Center for Earth Systems Technology, University of Maryland, Baltimore County, Baltimore, MD 21228, United States, Atmospheric Chemistry and Dynamics Laboratory, NASA Goddard Space Flight Center, Greenbelt, MD 20771, United States; Nicely, J.M., Atmospheric Chemistry and Dynamics Laboratory, NASA Goddard Space Flight Center, Greenbelt, MD 20771, United States, Earth System Science Interdisciplinary Center, University of Maryland, College Park, MD 20740, United States; Clair, J.M.S., Joint Center for Earth Systems Technology, University of Maryland, Baltimore County, Baltimore, MD 21228, United States, Atmospheric Chemistry and Dynamics Laboratory, NASA Goddard Space Flight Center, Greenbelt, MD 20771, United States; Hanisco, T.F., Atmospheric Chemistry and Dynamics Laboratory, NASA Goddard Space Flight Center, Greenbelt, MD 20771, United States; Liao, J., Atmospheric Chemistry and Dynamics Laboratory, NASA Goddard Space Flight Center, Greenbelt, MD 20771, United States, Universi...
推荐引用方式 GB/T 7714	Wolfe G.M.,Nicely J.M.,Clair J.M.S.,et al. Mapping hydroxyl variability throughout the global remote troposphere via synthesis of airborne and satellite formaldehyde observations[J],2019,166(23).
APA	Wolfe G.M..,Nicely J.M..,Clair J.M.S..,Hanisco T.F..,Liao J..,...&Dean-Day J..(2019).Mapping hydroxyl variability throughout the global remote troposphere via synthesis of airborne and satellite formaldehyde observations.Proceedings of the National Academy of Sciences of the United States of America,166(23).
MLA	Wolfe G.M.,et al."Mapping hydroxyl variability throughout the global remote troposphere via synthesis of airborne and satellite formaldehyde observations".Proceedings of the National Academy of Sciences of the United States of America 166.23(2019).