DOI: 10.1002/jgrd.50462
论文题名: Impact of the dominant large-scale teleconnections on winter temperature variability over East Asia
作者: Lim Y.-K. ; Kim H.-D.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 14 起始页码: 7835
结束页码: 7848
语种: 英语
英文关键词: East Asia
; teleconnection
; temperature
; winter
Scopus关键词: Atmospheric pressure
; Fluxes
; Temperature
; Temperature distribution
; East Asia
; Interannual variability
; Large-scale circulation
; Research and application
; Teleconnection patterns
; Teleconnections
; Temperature variability
; winter
; Climate change
; Arctic Oscillation
; El Nino-Southern Oscillation
; standing wave
; teleconnection
; temperature effect
; water temperature
; Far East
; Pacific Ocean
英文摘要: Monthly mean geopotential height for the past 33 DJF seasons archived in Modern Era Retrospective analysis for Research and Applications reanalysis is decomposed into the large-scale teleconnection patterns to explain their impacts on winter temperature variability over East Asia. Following Arctic Oscillation (AO) that explains the largest variance, East Atlantic/West Russia (EA/WR), West Pacific (WP) and El Niño-Southern Oscillation (ENSO) are identified as the first four leading modes that significantly explain East Asian winter temperature variation. While the northern part of East Asia north of 50°N is prevailed by AO and EA/WR impacts, temperature in the midlatitudes (30°N-50°N), which include Mongolia, northeastern China, Shandong area, Korea, and Japan, is influenced by combined effect of the four leading teleconnections. ENSO impact on average over 33 winters is relatively weaker than the impact of the other three teleconnections. WP impact, which has received less attention than ENSO in earlier studies, characterizes winter temperatures over Korea, Japan, and central to southern China region south of 30°N mainly by advective process from the Pacific. Upper level wave activity fluxes reveal that, for the AO case, the height and circulation anomalies affecting midlatitude East Asian winter temperature is mainly located at higher latitudes north of East Asia. Distribution of the fluxes also explains that the stationary wave train associated with EA/WR propagates southeastward from the western Russia, affecting the East Asian winter temperature. Investigation on the impact of each teleconnection for the selected years reveals that the most dominant teleconnection over East Asia is not the same at all years, indicating a great deal of interannual variability. Comparison in temperature anomaly distributions between observation and temperature anomaly constructed using the combined effect of four leading teleconnections clearly show a reasonable consistency between them, demonstrating that the seasonal winter temperature distributions over East Asia are substantially explained by these four large-scale circulation impacts. Key Points Identification of the dominant teleconnections Physical mechanism associated with the dominant teleconnections Interannual variability of the teleconnection impacts ©2013. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/63524
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: NASA Goddard Space Flight Center, Goddard Earth Sciences Technology and Research (GESTAR), I. M. System Group, Columbia MD, United States; College of Environment, Keimyung University, Daegu, South Korea
Recommended Citation:
Lim Y.-K.,Kim H.-D.. Impact of the dominant large-scale teleconnections on winter temperature variability over East Asia[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(14)