DOI: 10.1175/JCLI-D-12-00842.1
Scopus记录号: 2-s2.0-84888032160
论文题名: Interannual variability of the East Asian winter monsoon and related modulations of the planetary waves
作者: Takaya K. ; Nakamura H.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2013
卷: 26, 期: 23 起始页码: 9445
结束页码: 9461
语种: 英语
Scopus关键词: Cold air
; Interannual variability
; Planetary Waves
; Rossby wave
; Teleconnections
; Atmospheric temperature
; Dynamics
; Modulation
; Troposphere
; Atmospheric thermodynamics
; air-sea interaction
; annual variation
; atmospheric dynamics
; geopotential
; monsoon
; planetary wave
; Rossby wave
; teleconnection
; temperature anomaly
; troposphere
; winter
; Atlantic Ocean
; Atlantic Ocean (North)
; Far East
; Pacific Ocean
; Pacific Ocean (West)
英文摘要: Interannual variability of the East Asian winter monsoon is investigated through composite analysis applied to observational data for 50 recent years. Although the monsoon activity itself is confined into the lower troposphere, its midwinter variability tends to accompany upper-tropospheric geopotential height anomalies similar to the Eurasian (EU) and western Pacific (WP) teleconnection patterns. The "EU-like" pattern is characterized by a wavy signature over the Eurasian continent and the North Atlantic, with surface temperature anomalies over the Far East and North America. In the "WP-like" pattern, a meridional dipole of upper-level height anomalies is evident over the Far East. These anomaly patterns related to the anomalous winter monsoon activity are found to accompany marked modulations of the climatological development of the upper-tropospheric planetary waves from late autumn to midwinter. Enhanced monsoon activity in January associated with the WP-like pattern involves anomalous seasonal development of a planetary wave ridge with enhanced positive height tendencies from November to January over eastern Siberia and Alaska, while the corresponding tendencies are anomalously negative under the weakened monsoon activity. The stronger monsoon also accompanies an enhanced seasonal decline of geopotential height over the midlatitude North Pacific, corresponding to the enhanced southeastward development of a planetary wave trough. Similar modulations of the planetary wave evolution are observed with the anomalous monsoon activity associated with the EU-like pattern. In addition, the anomalous midwinter activity of the monsoon is also accompanied by noticeable variability of the seasonal development of the planetary waves over the Euro-Atlantic sector. © 2013 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/51501
Appears in Collections: 气候变化事实与影响
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作者单位: Research Institute for Global Change, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), 3173-25, Showa-machi, Kanazawa-ku, Yokohama 236-0001, Japan; Research Center for Advanced Science and Technology, The University of Tokyo, Tokyo, Japan
Recommended Citation:
Takaya K.,Nakamura H.. Interannual variability of the East Asian winter monsoon and related modulations of the planetary waves[J]. Journal of Climate,2013-01-01,26(23)