气候变化领域集成服务门户(CCPortal): Classification of wintertime atmospheric teleconnection patterns in the northern hemisphere

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DOI	10.1175/JCLI-D-20-0339.1
	Classification of wintertime atmospheric teleconnection patterns in the northern hemisphere
	Kim M.; Yoo C.; Sung M.-K.; Lee S.
发表日期	2021
ISSN	08948755
起始页码	1847
结束页码	1861
卷号	34 期号:5
英文摘要	Energetics of the major atmospheric teleconnection patterns of the Northern Hemisphere winter are examined to investigate the role of baroclinic and barotropic energy conversions in their growth. Based on characteristics of the energetics and the horizontal structures, the patterns are classified into three general types: meridional dipole (D-type), wave (W-type), and hybrid (H-type). The primary energy conversion term that differentiates these patterns is the baroclinic energy conversion of the available potential energy from the climatology to the eddy field associated with the teleconnections. For this conversion term, D-type patterns exhibit the comparable conversion of potential energy via the eddy heat flux across the climatological thermal gradient in both the zonal and meridional directions. In contrast, baroclinic conversion for W-type patterns occurs primarily in the meridional direction, while H-type patterns exhibit a structure that combines the characteristics of the other two pattern types. An important secondary factor is barotropic conversion from the climatology to the eddy field, which takes place mainly in the regions where the climatological shear is strong. For the D-type patterns, conversion occurs on the flank of the climatological jet exit, while it occurs at the center of the jet exit for the W-type patterns. Last, for all the patterns, synoptic-time-scale eddies make a negative contribution via the baroclinic process, but a positive contribution via the barotropic process. Damping by diabatic heating weakens the temperature anomalies associated with the patterns. © 2021 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	Dynamics; Large-scale motions; Teleconnections
语种	英语
scopus关键词	Climatology; Energy conversion; Molecular physics; Potential energy; Atmospheric teleconnection patterns; Barotropic process; Diabatic heating; Eddy heat fluxes; Meridional dipole; Northern Hemispheres; Teleconnections; Temperature anomaly; Heat flux; baroclinic motion; climatology; diabatic process; eddy; heat flux; meridional circulation; Northern Hemisphere; teleconnection; temperature anomaly; temperature gradient; winter
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/178704
作者单位	Department of Climate and Energy Systems Engineering, Ewha Womans University, Seoul, South Korea; Irreversible Climate Change Research Center, Yonsei University, Seoul, South Korea; Department of Meteorology and Atmospheric Science, Pennsylvania State University, University Park, PA, United States
推荐引用方式 GB/T 7714	Kim M.,Yoo C.,Sung M.-K.,et al. Classification of wintertime atmospheric teleconnection patterns in the northern hemisphere[J],2021,34(5).
APA	Kim M.,Yoo C.,Sung M.-K.,&Lee S..(2021).Classification of wintertime atmospheric teleconnection patterns in the northern hemisphere.Journal of Climate,34(5).
MLA	Kim M.,et al."Classification of wintertime atmospheric teleconnection patterns in the northern hemisphere".Journal of Climate 34.5(2021).