气候变化领域集成服务门户(CCPortal): Asymmetry and pathways of inter-hemispheric transport in the upper troposphere and lower stratosphere

CCPortal

DOI	10.5194/acp-21-6627-2021
	Asymmetry and pathways of inter-hemispheric transport in the upper troposphere and lower stratosphere
	Yan X.; Konopka P.; Hauck M.; Aurelien P.; Ploeger F.
发表日期	2021
ISSN	1680-7316
起始页码	6627
结束页码	6645
卷号	21 期号:9
英文摘要	Inter-hemispheric transport may strongly affect the trace gas composition of the atmosphere, especially in relation to anthropogenic emissions, which originate mainly in the Northern Hemisphere. This study investigates the transport from the boundary surface layer of the northern hemispheric (NH) extratropics (30-90span classCombining double low line"inline-formula"g/span N), southern hemispheric (SH) extratropics (30-90span classCombining double low line"inline-formula"g/span S), and tropics (30span classCombining double low line"inline-formula"g/span S-30span classCombining double low line"inline-formula"g/span N) into the global upper troposphere and lower stratosphere (UTLS) using simulations with the Chemical Lagrangian Model of the Stratosphere (CLaMS). In particular, we diagnose inter-hemispheric transport in terms of the air mass fractions (AMFs), age spectra, and the mean age of air (AoA) calculated for these three source regions. We find that the AMFs from the NH extratropics to the UTLS are about 5 times larger than the corresponding contributions from the SH extratropics and almost 20 times smaller than those from the tropics. The amplitude of the AMF seasonal variability originating from the NH extratropics is comparable to that from the tropics. The NH and SH extratropical age spectra show much stronger seasonality compared to the seasonality of the tropical age spectra. The transit time of NH-extratropical-origin air to the SH extratropics is longer than vice versa. The asymmetry of the inter-hemispheric transport is mainly driven by the Asian summer monsoon (ASM). We confirm the important role of ASM and westerly ducts in the inter-hemispheric transport from the NH extratropics to the SH. Furthermore, we find that it is an interplay between the ASM and westerly ducts which triggers such cross-Equator transport from boreal summer to fall in the UTLS between 350 and 370 K./p. © 2021 Copernicus GmbH. All rights reserved.
语种	英语
scopus关键词	boundary layer; Northern Hemisphere; seasonal variation; seasonality; Southern Hemisphere; stratosphere; troposphere
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/246930
作者单位	State Key Laboratory of Severe Weatherg€andg€CMA Key Laboratory of Atmospheric Chemistry, Chinese Academy of Meteorological Sciences, Beijing, China; Institute for Energy and Climate Research: Stratosphere (IEK-7), Forschungszentrum Jülich, Jülich, Germany; Institute for Atmospheric and Environmental Research, University of Wuppertal, Wuppertal, Germany; Institute for Atmospheric and Environmental Sciences, Goethe University Frankfurt Am Main, Frankfurt am Main, Germany; Laboratoire de Météorologie Dynamique (LMD/IPSL), Institut Polytechnique de Paris, École Normale Supérieure, Paris, France; Institute for Energy and Climate Research: Stratosphere (IEK-7), Forschungszentrum Jülich, Jülich, Germany
推荐引用方式 GB/T 7714	Yan X.,Konopka P.,Hauck M.,et al. Asymmetry and pathways of inter-hemispheric transport in the upper troposphere and lower stratosphere[J],2021,21(9).
APA	Yan X.,Konopka P.,Hauck M.,Aurelien P.,&Ploeger F..(2021).Asymmetry and pathways of inter-hemispheric transport in the upper troposphere and lower stratosphere.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(9).
MLA	Yan X.,et al."Asymmetry and pathways of inter-hemispheric transport in the upper troposphere and lower stratosphere".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.9(2021).