气候变化领域集成服务门户(CCPortal): Transport From the Asian Summer Monsoon Anticyclone Over the Western Pacific

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DOI	10.1029/2019JD032094
	Transport From the Asian Summer Monsoon Anticyclone Over the Western Pacific
	Honomichl S.B.; Pan L.L.
发表日期	2020
ISSN	2169897X
卷号	125 期号:13
英文摘要	The subseasonal scale dynamics of the Asian summer monsoon (ASM) upper troposphere (UT) anticyclone has been identified as a primary mechanism for convectively lofted Asian boundary layer air to leave the confinement of the anticyclone and impact the global UT and lower stratosphere (UTLS). This work quantifies eastward eddy shedding associated with the subseasonal scale oscillation of the anticyclone and associated chemical transport. Using reanalysis data together with satellite trace gas data, we examine the correlation between enhanced tropospheric trace gas species and the presence of a secondary anticyclone over the western Pacific Ocean. To diagnose the role of the western Pacific anticyclone (WPA) in the transport of ASM air into the global UTLS, transport pathways and transit times of air found within the WPA are analyzed using Lagrangian kinematic trajectories. Results show that about two thirds of the air within the WPA originates from, or is influenced by, the greater region of the Tibetan anticyclone. After leaving the WPA, air favors two pathways forward: eastward following the subtropical jet and southwestward following UTLS anticyclonic flow. Approximately 60% of the air parcels cross the tropopause into the lower stratosphere within 30 days, though most cross within a few days. These results highlight opportunities for investigating the impact of the ASM on global UTLS chemical and aerosol composition over the western Pacific via research aircraft. © 2020. American Geophysical Union. All Rights Reserved.
英文关键词	Asian Monsoon Transport; Trajectory Modeling; Upper Tropospheric Chemical Composition
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/185931
作者单位	Atmospheric Chemistry Observations and Modeling Lab, National Center for Atmospheric Research, Boulder, CO, United States
推荐引用方式 GB/T 7714	Honomichl S.B.,Pan L.L.. Transport From the Asian Summer Monsoon Anticyclone Over the Western Pacific[J],2020,125(13).
APA	Honomichl S.B.,&Pan L.L..(2020).Transport From the Asian Summer Monsoon Anticyclone Over the Western Pacific.Journal of Geophysical Research: Atmospheres,125(13).
MLA	Honomichl S.B.,et al."Transport From the Asian Summer Monsoon Anticyclone Over the Western Pacific".Journal of Geophysical Research: Atmospheres 125.13(2020).