气候变化领域集成服务门户(CCPortal): Inter-model comparison of global hydroxyl radical (OH) distributions and their impact on atmospheric methane over the 2000-2016 period

CCPortal

DOI	10.5194/acp-19-13701-2019
	Inter-model comparison of global hydroxyl radical (OH) distributions and their impact on atmospheric methane over the 2000-2016 period
	Zhao Y.; Saunois M.; Bousquet P.; Lin X.; Berchet A.; Hegglin M.I.; Canadell J.G.; Jackson R.B.; Hauglustaine D.A.; Szopa S.; Stavert A.R.; Luke Abraham N.; Archibald A.T.; Bekki S.; Deushi M.; Jöckel P.; Josse B.; Kinnison D.; Kirner O.; Marécal V.; O'Connor F.M.; Plummer D.A.; Revell L.E.; Rozanov E.; Stenke A.; Strode S.; Tilmes S.; Dlugokencky E.J.; Zheng B.
发表日期	2019
ISSN	16807316
起始页码	13701
结束页码	13723
卷号	19 期号:21
英文摘要	The modeling study presented here aims to estimate how uncertainties in global hydroxyl radical (OH) distributions, variability, and trends may contribute to resolving discrepancies between simulated and observed methane (CH4) changes since 2000. A multi-model ensemble of 14 OH fields was analyzed and aggregated into 64 scenarios to force the offline atmospheric chemistry transport model LMDz (Laboratoire de Meteorologie Dynamique) with a standard CH4 emission scenario over the period 2000-2016. The multi-model simulated global volume-weighted tropospheric mean OH concentration ([OH]) averaged over 2000-2010 ranges between 8:7 × 105 and 12:8 × 105 molec cm-3. The inter-model differences in tropospheric OH burden and vertical distributions are mainly determined by the differences in the nitrogen oxide (NO) distributions, while the spatial discrepancies between OH fields are mostly due to differences in natural emissions and volatile organic compound (VOC) chemistry. From 2000 to 2010, most simulated OH fields show an increase of 0.1-0:3 × 105 molec cm-3 in the tropospheric mean [OH], with year-to-year variations much smaller than during the historical period 1960-2000. Once ingested into the LMDz model, these OH changes translated into a 5 to 15 ppbv reduction in the CH4 mixing ratio in 2010, which represents 7 %-20 % of the model-simulated CH4 increase due to surface emissions. Between 2010 and 2016, the ensemble of simulations showed that OH changes could lead to a CH4 mixing ratio uncertainty of > ±30 ppbv. Over the full 2000-2016 time period, using a common stateof-the-art but nonoptimized emission scenario, the impact of [OH] changes tested here can explain up to 54 % of the gap between model simulations and observations. This result emphasizes the importance of better representing OH abundance and variations in CH4 forward simulations and emission optimizations performed by atmospheric inversions. © 2019 BMJ Publishing Group. All rights reserved.
语种	英语
scopus关键词	annual variation; atmospheric chemistry; atmospheric modeling; comparative study; hydroxyl radical; methane; spatial distribution; uncertainty analysis
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/144752
作者单位	Laboratoire des Sciences du Climat et de l'Environnement, LSCE-IPSL (CEA-CNRS-UVSQ), Université Paris-Saclay, Gif-sur-Yvette, 91191, France; Department of Meteorology, University of Reading, Reading, United Kingdom; Global Carbon Project, CSIRO Oceans and Atmosphere, Canberra, ACT 2601, Australia; Earth System Science Department, Woods Institute for the Environment, Precourt Institute for Energy, Stanford University, Stanford, CA 94305, United States; CSIRO Oceans and Atmosphere, Aspendale, VIC 3195, Australia; Department of Chemistry, University of Cambridge, Cambridge, CB2 1EW, United Kingdom; NCAS-Climate, University of Cambridge, Cambridge, CB2 1EW, United Kingdom; LATMOS, Université Pierre et Marie Curie, 4 Place Jussieu Tour 45, couloir 45-46, 3e étage Boite 102, Paris CEDEX 05, 75252, France; Meteorological Research Institute, 1-1 Nagamine, Tsukuba, Ibaraki, 305-0052, Japan; Deutsches Zentrum für Luft-und Raumfahrt (DLR), Institut für Physik der Atmosphäre, Oberpfaffenhofen, Germany; Centre Nati...
推荐引用方式 GB/T 7714	Zhao Y.,Saunois M.,Bousquet P.,et al. Inter-model comparison of global hydroxyl radical (OH) distributions and their impact on atmospheric methane over the 2000-2016 period[J],2019,19(21).
APA	Zhao Y..,Saunois M..,Bousquet P..,Lin X..,Berchet A..,...&Zheng B..(2019).Inter-model comparison of global hydroxyl radical (OH) distributions and their impact on atmospheric methane over the 2000-2016 period.Atmospheric Chemistry and Physics,19(21).
MLA	Zhao Y.,et al."Inter-model comparison of global hydroxyl radical (OH) distributions and their impact on atmospheric methane over the 2000-2016 period".Atmospheric Chemistry and Physics 19.21(2019).