气候变化领域集成服务门户(CCPortal): The middle atmospheric meridional circulation for 2002-2012 derived from MIPAS observations

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DOI	10.5194/acp-21-8823-2021
	The middle atmospheric meridional circulation for 2002-2012 derived from MIPAS observations
	Von Clarmann T.; Grabowski U.; Stiller G.P.; Monge-Sanz B.M.; Glatthor N.; Kellmann S.
发表日期	2021
ISSN	1680-7316
起始页码	8823
结束页码	8843
卷号	21 期号:11
英文摘要	Measurements of long-lived trace gases (SF6, CFC-11, CFC-12, HCFC-22, CCl4, N2O, CH4, H2O, and CO) performed with the Michelson Interferometer for Passive Atmospheric Sounding (MIPAS) have been used to infer the stratospheric and mesospheric meridional circulation. The MIPAS data set covers the time period from July 2002 to April 2012. The method used for this purpose was the direct inversion of the two-dimensional continuity equation for the concentrations of trace gases and air density. This inversion predicts an "effective velocity"that gives the best fit for the evolution of the concentrations on the assumption that an explicit treatment of Fickian diffusion can be neglected. These effective velocity fields are used to characterize the mean meridional circulation. Multiannual monthly mean effective velocity fields are presented, along with their variabilities. According to this measure, the stratospheric circulation is found to be highly variable over the year, with a quite robust annual cycle. The new method allows us to track the evolution of various circulation patterns over the year in more detail than before. According to the effective velocity characterization of the circulation, the deep branch of the Brewer-Dobson circulation and the mesospheric overturning pole-to-pole circulation are not separate but intertwined phenomena. The latitude of stratospheric uplift in the middle and upper stratosphere is found to be quite variable and is not always found at equatorial latitudes. The usual schematic of stratospheric circulation with the deep and the shallow branch of the Brewer-Dobson circulation and the mesospheric overturning circulation is an idealization which best describes the observed atmosphere around equinox. Sudden stratospheric warmings and the quasi-biennial oscillation cause a pronounced year-to-year variability of the meridional circulation. © Copyright:
语种	英语
scopus关键词	concentration (composition); data set; equation; meridional circulation; mesosphere; MIPAS; stratosphere; trace gas
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/246816
作者单位	Karlsruhe Institute of Technology, Institute of Meteorology and Climate Research, Karlsruhe, Germany; University of Reading, Department of Meteorology, Reading, United Kingdom; Physics Department, University of Oxford, Oxford, United Kingdom
推荐引用方式 GB/T 7714	Von Clarmann T.,Grabowski U.,Stiller G.P.,et al. The middle atmospheric meridional circulation for 2002-2012 derived from MIPAS observations[J],2021,21(11).
APA	Von Clarmann T.,Grabowski U.,Stiller G.P.,Monge-Sanz B.M.,Glatthor N.,&Kellmann S..(2021).The middle atmospheric meridional circulation for 2002-2012 derived from MIPAS observations.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(11).
MLA	Von Clarmann T.,et al."The middle atmospheric meridional circulation for 2002-2012 derived from MIPAS observations".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.11(2021).