气候变化领域集成服务门户(CCPortal): 3-D tomographic observations of Rossby wave breaking over the North Atlantic during the WISE aircraft campaign in 2017

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DOI	10.5194/acp-21-10249-2021
	3-D tomographic observations of Rossby wave breaking over the North Atlantic during the WISE aircraft campaign in 2017
	Krasauskas L.; Ungermann J.; Preusse P.; Friedl-Vallon F.; Zahn A.; Ziereis H.; Rolf C.; Plöger F.; Konopka P.; Vogel B.; Riese M.
发表日期	2021
ISSN	1680-7316
起始页码	10249
结束页码	10272
卷号	21 期号:13
英文摘要	This paper presents measurements of ozone, water vapour and nitric acid (HNO3) in the upper troposphere/lower stratosphere (UTLS) over North Atlantic and Europe. The measurements were acquired with the Gimballed Limb Observer for Radiance Imaging of the Atmosphere (GLORIA) during the Wave Driven Isentropic Exchange (WISE) campaign in October 2017. GLORIA is an airborne limb imager capable of acquiring both 2-D data sets (curtains along the flight path) and, when the carrier aircraft is flying around the observed air mass, spatially highly resolved 3-D tomographic data. Here, we present a case study of a Rossby wave (RW) breaking event observed during two subsequent flights 2d apart. RW breaking is known to steepen tracer gradients and facilitate stratosphere-troposphere exchange (STE). Our measurements reveal complex spatial structures in stratospheric tracers (ozone and nitric acid) with multiple vertically stacked filaments. Backward-trajectory analysis is used to demonstrate that these features are related to several previous Rossby wave breaking events and that the small-scale structure of the UTLS in the Rossby wave breaking region, which is otherwise very hard to observe, can be understood as stirring and mixing of air masses of tropospheric and stratospheric origin. It is also shown that a strong nitric acid enhancement observed just above the tropopause is likely a result of NOx production by lightning activity. The measurements showed signatures of enhanced mixing between stratospheric and tropospheric air near the polar jet with some transport of water vapour into the stratosphere. Some of the air masses seen in 3-D data were encountered again 2d later, stretched to very thin filament (horizontal thickness down to 30km at some altitudes) rich in stratospheric tracers. This repeated measurement allowed us to directly observe and analyse the progress of mixing processes in a thin filament over 2d. Our results provide direct insight into small-scale dynamics of the UTLS in the Rossby wave breaking region, which is of great importance to understanding STE and poleward transport in the UTLS. © 2021 Copernicus GmbH. All rights reserved.
语种	英语
scopus关键词	air mass; aircraft; mixing; Rossby wave; stratosphere; three-dimensional modeling; tomography; troposphere; water vapor; wave breaking; Atlantic Ocean; Atlantic Ocean (North)
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/246750
作者单位	Institute of Energy and Climate Research-Stratosphere (IEK-7), Forschungszentrum Jülich, Jülich, Germany; Jülich Aachen Research Alliance (JARA), Forschungszentrum Jülich, Jülich, Germany; The Institute of Meteorology and Climate Research (IMK), Karlsruhe Institute of Technology, Karlsruhe, Germany; The German Aerospace Center (Deutsches Zentrum für Luft-und Raumfahrt; DLR), Institute for Atmospheric Physics, Oberpfaffenhofen, Germany
推荐引用方式 GB/T 7714	Krasauskas L.,Ungermann J.,Preusse P.,et al. 3-D tomographic observations of Rossby wave breaking over the North Atlantic during the WISE aircraft campaign in 2017[J],2021,21(13).
APA	Krasauskas L..,Ungermann J..,Preusse P..,Friedl-Vallon F..,Zahn A..,...&Riese M..(2021).3-D tomographic observations of Rossby wave breaking over the North Atlantic during the WISE aircraft campaign in 2017.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(13).
MLA	Krasauskas L.,et al."3-D tomographic observations of Rossby wave breaking over the North Atlantic during the WISE aircraft campaign in 2017".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.13(2021).