气候变化领域集成服务门户(CCPortal): Estimates of Regional Source Contributions to the Asian Tropopause Aerosol Layer Using a Chemical Transport Model

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DOI	10.1029/2019JD031506
	Estimates of Regional Source Contributions to the Asian Tropopause Aerosol Layer Using a Chemical Transport Model
	Fairlie T.D.; Liu H.; Vernier J.-P.; Campuzano-Jost P.; Jimenez J.L.; Jo D.S.; Zhang B.; Natarajan M.; Avery M.A.; Huey G.
发表日期	2020
ISSN	2169897X
卷号	125 期号:4
英文摘要	The Asian Tropopause Aerosol Layer (ATAL) represents an accumulation of aerosol in the upper troposphere and lower stratosphere associated with the Asian Summer Monsoon. Here we simulate the ATAL for summer 2013 with the GEOS-Chem chemical transport model and explore the likely composition of ATAL aerosols and the relative contributions of regional anthropogenic sources versus those from farther afield. The model indicates significant contributions from organic aerosol, nitrate, sulfate, and ammonium aerosol, with regional anthropogenic precursor sources dominant. The model underestimates aerosol backscatter in the ATAL during summer 2013, compared with Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations (CALIPSO) satellite instrument. Tests of a more physically based treatment of wet scavenging of SO2 in convective updrafts raise sulfate, eliminating the low bias with respect to CALIPSO backscatter in the ATAL, but lead to an unacceptable high bias of sulfate compared with in situ observations from aircraft over the United States. Source apportionment of the model results indicate the dominance of regional anthropogenic emissions from China and the Indian subcontinent to aerosol concentrations in the ATAL; ~60% of sulfate in the ATAL region in August 2013 is attributable to anthropogenic sources of SO2 from China (~30%) and from the Indian subcontinent (~30%), twice as much as in previously published estimates. Nitrate aerosol is found to be a dominant component of aerosol composition on the southern flank of the Asian Summer Monsoon anticyclone. Lightning sources of NOx are found to make a significant (10–15%) contribution to nitrate in the ATAL for the case studied. ©2020. The Authors.
英文关键词	aerosol; Asian Summer Monsoon; ATAL; CALIPSO; GEOS-Chem; SEAC4RS
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/186182
作者单位	NASA Langley Research Center, Hampton, VA, United States; National Institute of Aerospace, Hampton, VA, United States; Department of Chemistry and Cooperative Institute for Research in Environmental Sciences (CIRES), University of Colorado, Boulder, CO, United States; School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, GA, United States
推荐引用方式 GB/T 7714	Fairlie T.D.,Liu H.,Vernier J.-P.,et al. Estimates of Regional Source Contributions to the Asian Tropopause Aerosol Layer Using a Chemical Transport Model[J],2020,125(4).
APA	Fairlie T.D..,Liu H..,Vernier J.-P..,Campuzano-Jost P..,Jimenez J.L..,...&Huey G..(2020).Estimates of Regional Source Contributions to the Asian Tropopause Aerosol Layer Using a Chemical Transport Model.Journal of Geophysical Research: Atmospheres,125(4).
MLA	Fairlie T.D.,et al."Estimates of Regional Source Contributions to the Asian Tropopause Aerosol Layer Using a Chemical Transport Model".Journal of Geophysical Research: Atmospheres 125.4(2020).