气候变化领域集成服务门户(CCPortal): Maintenance mechanism for the teleconnection pattern over the high latitudes of the Eurasian continent in summer

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DOI	10.1175/JCLI-D-19-0362.1
	Maintenance mechanism for the teleconnection pattern over the high latitudes of the Eurasian continent in summer
	Xinyu L.I.; Riyu L.U.; Greatbatch R.J.; Gen L.I.; Hong X.
发表日期	2020
ISSN	0894-8755
起始页码	1017
结束页码	1030
卷号	33 期号:3
英文摘要	There is a zonally oriented teleconnection pattern over the high-latitude Eurasian continent, which is maintained through baroclinic energy conversion. In this study, we investigate the unique features of the maintenance mechanism of this teleconnection. It is found that the baroclinic energy conversion is most efficient in both the midtroposphere and the lower troposphere, and that the baroclinic energy conversion in the lower troposphere is comparable to that in the midtroposphere. Further results indicate that the basic state plays a crucial role in the baroclinic energy conversion. For both the middle and lower troposphere, the atmospheric stability is low and the Coriolis parameter is large over high-latitude Eurasia, favoring strong baroclinic energy conversion. Particularly, in the lower troposphere, the atmospheric stability exhibits a clear land-sea contrast, favoring baroclinic energy conversion over the continents rather than the oceans. Furthermore, in the lower troposphere, the in-phase configuration of the meridional wind and temperature anomalies, which results from the strong meridional gradient of mean temperature around the north edge of the Eurasian continent, also significantly contributes to baroclinic energy conversion. This study highlights the role of the basic state of temperature rather than zonal wind in maintaining the high-latitude teleconnection through baroclinic energy conversion. © 2020 American Meteorological Society. For information regarding reuse of this content and general copyright information, consult the AMS Copyright Policy (www.ametsoc.org/PUBSReuseLicenses).
英文关键词	Troposphere; Atmospheric stability; Coriolis parameter; Lower troposphere; Mean temperature; Meridional gradients; Meridional winds; Teleconnection patterns; Temperature anomaly; Energy conversion; baroclinic mode; climate effect; climate modeling; latitude; summer; teleconnection; troposphere
语种	英语
来源期刊	Journal of Climate
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/171471
作者单位	College of Oceanography, Hohai University, Nanjing, China; State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics, Chinese Academy of Sciences, College of Earth and Planetary Sciences, University of the Chinese Academy of Sciences, Beijing, China; Ocean Circulation and Climate Dynamics, GEOMAR Helmholtz Centre for Ocean Research Kiel, Faculty of Mathematics and Natural Sciences, University of Kiel, Kiel, Germany; College of Earth and Planetary Sciences, University of the Chinese Academy of Sciences, Climate Change Research Center, Nansen-Zhu International Research Centre, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China
推荐引用方式 GB/T 7714	Xinyu L.I.,Riyu L.U.,Greatbatch R.J.,et al. Maintenance mechanism for the teleconnection pattern over the high latitudes of the Eurasian continent in summer[J],2020,33(3).
APA	Xinyu L.I.,Riyu L.U.,Greatbatch R.J.,Gen L.I.,&Hong X..(2020).Maintenance mechanism for the teleconnection pattern over the high latitudes of the Eurasian continent in summer.Journal of Climate,33(3).
MLA	Xinyu L.I.,et al."Maintenance mechanism for the teleconnection pattern over the high latitudes of the Eurasian continent in summer".Journal of Climate 33.3(2020).