气候变化领域集成服务门户(CCPortal): Transport of Nitric Oxide Via Lagrangian Coherent Structures Into the Top of the Polar Vortex

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DOI	10.1029/2020JD034523
	Transport of Nitric Oxide Via Lagrangian Coherent Structures Into the Top of the Polar Vortex
	Harvey V.L.; Datta-Barua S.; Pedatella N.M.; Wang N.; Randall C.E.; Siskind D.E.; van Caspel W.E.
发表日期	2021
ISSN	2169897X
卷号	126 期号:11
英文摘要	The energetic particle precipitation (EPP) indirect effect (IE) refers to the downward transport of reactive odd nitrogen (NOx = NO + NO2) produced by EPP (EPP-NOx) from the polar winter mesosphere and lower thermosphere to the stratosphere where it can destroy ozone. Previous studies of the EPP IE examined NOx descent averaged over the polar region, but the work presented here considers longitudinal variations. We report that the January 2009 split Arctic vortex in the stratosphere left an imprint on the distribution of NO near the mesopause, and that the magnitude of EPP-NOx descent in the upper mesosphere depends strongly on the planetary wave (PW) phase. We focus on an 11-day case study in late January immediately following the 2009 sudden stratospheric warming during which regional-scale Lagrangian coherent structures (LCSs) formed atop the strengthening mesospheric vortex. The LCSs emerged over the north Atlantic in the vicinity of the trough of a 10-day westward traveling planetary wave. Over the next week, the LCSs acted to confine NO-rich air to polar latitudes, effectively prolonging its lifetime as it descended into the top of the polar vortex. Both a whole atmosphere data assimilation model and satellite observations show that the PW trough remained coincident in space and time with the NO-rich air as both migrated westward over the Canadian Arctic. Estimates of descent rates indicate five times stronger descent inside the PW trough compared to other longitudes. This case serves to set the stage for future climatological analysis of NO transport via LCSs. © 2021. The Authors.
英文关键词	coupling; mesosphere; middle atmosphere; planetary wave; polar vortex; transport
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/185149
作者单位	Laboratory for Atmospheric and Space Physics, University of Colorado, Boulder, CO, United States; Department of Atmospheric and Oceanic Sciences, University of Colorado, Boulder, CO, United States; Department of Mechanical, Materials, and Aerospace Engineering, Illinois Institute of Technology, Chicago, IL, United States; High Altitude Observatory, National Center for Atmospheric Research, Boulder, CO, United States; Department of Atmospheric Sciences, Hampton University, Hampton, VA, United States; Space Science Division, Naval Research Laboratory, Washington, DC, United States; Department of Physics, Norwegian University of Science and Technology, Norway; Birkeland Centre for Space Science, University of Bergen, Bergen, Norway
推荐引用方式 GB/T 7714	Harvey V.L.,Datta-Barua S.,Pedatella N.M.,et al. Transport of Nitric Oxide Via Lagrangian Coherent Structures Into the Top of the Polar Vortex[J],2021,126(11).
APA	Harvey V.L..,Datta-Barua S..,Pedatella N.M..,Wang N..,Randall C.E..,...&van Caspel W.E..(2021).Transport of Nitric Oxide Via Lagrangian Coherent Structures Into the Top of the Polar Vortex.Journal of Geophysical Research: Atmospheres,126(11).
MLA	Harvey V.L.,et al."Transport of Nitric Oxide Via Lagrangian Coherent Structures Into the Top of the Polar Vortex".Journal of Geophysical Research: Atmospheres 126.11(2021).