气候变化领域集成服务门户(CCPortal): Summertime Transport Pathways From Different Northern Hemisphere Regions Into the Arctic

CCPortal

DOI	10.1029/2020JD033811
	Summertime Transport Pathways From Different Northern Hemisphere Regions Into the Arctic
	Zheng C.; Wu Y.; Ting M.; Orbe C.; Wang X.; Tilmes S.
发表日期	2021
ISSN	2169897X
卷号	126 期号:4
英文摘要	Trace gases and aerosols play an important role in Arctic chemistry and climate. As most Arctic tracers and aerosols are transported from midlatitude source regions, long-range transport into the Arctic is one of the key factors to understand the current and future states of Arctic climate. While previous studies have investigated the airmass fraction and transit time distribution in the Arctic, the actual transport pathways and their underlying dynamics and efficiencies are yet to be understood. In this study, we implement a large ensemble of idealized tagged pulse passive tracers in the Whole Atmosphere Community Climate Model version 5 to identify and analyze summertime transport pathways from different Northern Hemisphere surface regions into the Arctic. Three different transport pathways are identified as those associated with fast, intermediate and slow time scales. Midlatitude tracers can be transported into the Arctic in the troposphere via the fast transport pathway (∼8 days), which moves tracers northward from the source region mainly through transient eddies. For the intermediate transport pathway, which happens on 1–3 weeks’ time scales, midlatitude tracers are first zonally transported by the jet stream, and then advected northward into the Arctic over Alaska and northern North Atlantic. Tropical and subtropical tracers are transported into the Arctic lower stratosphere via the slow transport pathway (1–3 months), as the tracers are lifted upward into the tropical and subtropical lower stratosphere, and then transported into the Arctic following the isentropic surfaces. © 2021. American Geophysical Union. All Rights Reserved.
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/185474
作者单位	Lamont-Doherty Earth Observatory, Columbia University, Palisades, NY, United States; NASA Goddard Institute for Space Studies, New York, NY, United States; National Center for Atmospheric Research, Atmospheric Chemistry Observations and Modeling Laboratory, Boulder, CO, United States
推荐引用方式 GB/T 7714	Zheng C.,Wu Y.,Ting M.,et al. Summertime Transport Pathways From Different Northern Hemisphere Regions Into the Arctic[J],2021,126(4).
APA	Zheng C.,Wu Y.,Ting M.,Orbe C.,Wang X.,&Tilmes S..(2021).Summertime Transport Pathways From Different Northern Hemisphere Regions Into the Arctic.Journal of Geophysical Research: Atmospheres,126(4).
MLA	Zheng C.,et al."Summertime Transport Pathways From Different Northern Hemisphere Regions Into the Arctic".Journal of Geophysical Research: Atmospheres 126.4(2021).