DOI: 10.1175/JCLI-D-15-0691.1
Scopus记录号: 2-s2.0-84964879375
论文题名: Response of the baiu rainband to northwest Pacific SST anomalies and its impact on atmospheric circulation
作者: Matsumura S. ; Horinouchi T. ; Sugimoto S. ; Sato T.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2016
卷: 29, 期: 8 起始页码: 3075
结束页码: 3093
语种: 英语
Scopus关键词: Atmospheric temperature
; Atmospheric thermodynamics
; Climate change
; Climate models
; Ocean currents
; Oceanography
; Orthogonal functions
; Precipitation (meteorology)
; Rain
; Surface waters
; Tropics
; Atmosphere-ocean interactions
; Geographic location
; Interannual variability
; Monsoons
; North Pacific Ocean
; Variability
; Fighter aircraft
; air-sea interaction
; annual variation
; atmospheric circulation
; monsoon
; rainband
; sea surface temperature
; Pacific Ocean
; Pacific Ocean (North)
; Sea of Okhotsk
英文摘要: The Pacific-Japan (PJ) teleconnection pattern leads to a meridional precipitation dipole between the subtropics and East Asia in the summer of El Niño decaying years. However, observational analysis and model experiments indicate that increased sea surface temperature (SST) in the Kuroshio-Oyashio Extension (KOE) region, where a strong northward-decreasing SST gradient occurs, induces a northward shift of baiu rainfall with the subtropical jet, forming a tripolar precipitation anomaly pattern over the northwest Pacific. In July, the leading empirical orthogonal function (EOF) mode for precipitation represents the meridional dipole between subtropical and baiu rainfalls, while EOF-2 features the northward-shifted baiu rainband. The PJ atmospheric forcing increases KOE SST, which enhances northward shifts in the subtropical jet and baiu rainband, resulting in oceanic forcing over the KOE. In experiments using a regional climate model the subtropical jet response to KOE SST forcing explains about 20% of the anomalies in the control experiment. The northward-shifted baiu condensational heating also enhances the northward shift of the subtropical jet with a northeastward extension. In August when the baiu rainband disappears, the northward shift of the subtropical jet is enhanced mainly by KOE SST variability. During the summer, as a result of increased KOE SST and the northward-shifted baiu heating, cyclonic anomalies intensify over the Sea of Okhotsk and anticyclonic anomalies intensify over the northwest Pacific, affecting the western Pacific subtropical high. The results suggest that air-sea interaction over the KOE must be considered to better understand the summer northwest Pacific climate. © 2016 American Meteorological Society. 资助项目: JSPS, Japan Society for the Promotion of Science
; MOE, Ministry of the Environment
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/49974
Appears in Collections: 气候变化事实与影响
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作者单位: Faculty of Environmental Earth Science, Hokkaido University, Sapporo, Japan; Japan Agency for Marine-Earth Science and Technology, Yokosuka, Japan
Recommended Citation:
Matsumura S.,Horinouchi T.,Sugimoto S.,et al. Response of the baiu rainband to northwest Pacific SST anomalies and its impact on atmospheric circulation[J]. Journal of Climate,2016-01-01,29(8)