气候变化领域集成服务门户(CCPortal): Investigating stratospheric changes between 2009 and 2018 with halogenated trace gas data from aircraft; AirCores; and a global model focusing on CFC-11

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DOI	10.5194/acp-20-9771-2020
	Investigating stratospheric changes between 2009 and 2018 with halogenated trace gas data from aircraft; AirCores; and a global model focusing on CFC-11
	Laube J.C.; Elvidge E.C.L.; Adcock K.E.; Baier B.; Brenninkmeijer C.A.M.; Chen H.; Droste E.S.; Grooß J.-U.; Heikkinen P.; Hind A.J.; Kivi R.; Lojko A.; Montzka S.A.; Oram D.E.; Randall S.; Röckmann T.; Sturges W.T.; Sweeney C.; Thomas M.; Tuffnell E.; Ploeger F.
发表日期	2020
ISSN	1680-7316
起始页码	9771
结束页码	9782
卷号	20 期号:16
英文摘要	We present new observations of trace gases in the stratosphere based on a cost-effective sampling technique that can access much higher altitudes than aircraft. The further development of this method now provides detection of species with abundances in the parts per trillion (ppt) range and below. We obtain mixing ratios for six gases (CFC-11, CFC-12, HCFC-22, H-1211, H-1301, and SF6), all of which are important for understanding stratospheric ozone depletion and circulation. After demonstrating the quality of the data through comparisons with ground-based records and aircraft-based observations, we combine them with the latter to demonstrate its potential. We first compare the data with results from a global model driven by three widely used meteorological reanalyses. Secondly, we focus on CFC-11 as recent evidence has indicated renewed atmospheric emissions of that species relevant on a global scale. Because the stratosphere represents the main sink region for CFC-11, potential changes in stratospheric circulation and troposphere-stratosphere exchange fluxes have been identified as the largest source of uncertainty for the accurate quantification of such emissions. Our observations span over a decade (up until 2018) and therefore cover the period of the slowdown of CFC-11 global mixing ratio decreases measured at the Earth's surface. The spatial and temporal coverage of the observations is insufficient for a global quantitative analysis, but we do find some trends that are in contrast with expectations, indicating that the stratosphere may have contributed to the slower concentration decline in recent years. Further investigating the reanalysis-driven model data, we find that the dynamical changes in the stratosphere required to explain the apparent change in tropospheric CFC-11 emissions after 2013 are possible but with a very high uncertainty range. This is partly caused by the high variability of mass flux from the stratosphere to the troposphere, especially at timescales of a few years, and partly by large differences between runs driven by different reanalysis products, none of which agree with our observations well enough for such a quantitative analysis. © 2020 Author(s).
语种	英语
scopus关键词	airborne survey; altitude; atmospheric chemistry; atmospheric modeling; data processing; halogen; mixing ratio; sampling; stratosphere; trace gas
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/141149
作者单位	Institute of Energy and Climate Research: Stratosphere, Jülich Research Centre, Jülich, 52428, Germany; School of Environmental Sciences, University of East Anglia, Norwich, NR4 7TJ, United Kingdom; Faculty of Science, University of East Anglia, Norwich Research Park, Norwich, NR4 7TJ, United Kingdom; Cooperative Institute for Research in Environmental Sciences, University of Colorado Boulder, Boulder, CO 80309, United States; Global Monitoring Division, National Oceanic and Atmospheric Administration, Boulder, CO 80305-3337, United States; Air Chemistry Division, Max Planck Institute for Chemistry, Mainz, 55128, Germany; Centre for Isotope Research, University of Groningen, Groningen, 9747 AG, Netherlands; Space and Earth Observation Centre, Finnish Meteorological Institute, Sodankylä, 99600, Finland; Department of Climate and Space Sciences and Engineering, University of Michigan, Ann Arbor, MI 48109-2143, United States; Random Engineering Ltd., Felixstowe, IP11 9SL, United Kingdom; Institute for Mar...
推荐引用方式 GB/T 7714	Laube J.C.,Elvidge E.C.L.,Adcock K.E.,et al. Investigating stratospheric changes between 2009 and 2018 with halogenated trace gas data from aircraft; AirCores; and a global model focusing on CFC-11[J],2020,20(16).
APA	Laube J.C..,Elvidge E.C.L..,Adcock K.E..,Baier B..,Brenninkmeijer C.A.M..,...&Ploeger F..(2020).Investigating stratospheric changes between 2009 and 2018 with halogenated trace gas data from aircraft; AirCores; and a global model focusing on CFC-11.Atmospheric Chemistry and Physics,20(16).
MLA	Laube J.C.,et al."Investigating stratospheric changes between 2009 and 2018 with halogenated trace gas data from aircraft; AirCores; and a global model focusing on CFC-11".Atmospheric Chemistry and Physics 20.16(2020).