DOI: 10.1002/2013JD020523
论文题名: On the effect of the East/Japan Sea SST variability on the North Pacific atmospheric circulation in a regional climate model
作者: Seo H. ; Kwon Y.-O. ; Park J.-J.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2014
卷: 119, 期: 2 起始页码: 418
结束页码: 444
语种: 英语
英文关键词: air-sea interaction
; atmospheric blocking
; East Asian marginal seas
; storm track
Scopus关键词: Climate change
; Coastal zones
; Sea level
; Storms
; Vorticity
; Wind
; Air sea interactions
; Atmospheric blocking
; Marginal seas
; Marine atmospheric boundary layer
; Regional climate modeling
; Sea surface temperature (SST)
; Storm track
; Weather Research and Forecast models
; Weather forecasting
; air-sea interaction
; atmospheric circulation
; atmospheric modeling
; boundary layer
; climate modeling
; forecasting method
; precipitation (climatology)
; regional climate
; sea surface temperature
; vorticity
; wind velocity
; Gulf of Alaska
; Pacific Ocean
; Sea of Japan
英文摘要: The East/Japan Sea (EJS) is a semi-enclosed marginal sea located in the upstream of the North Pacific storm track, where the leading modes of wintertime interannual variability in sea surface temperature (SST) are characterized by the basin-wide warming-cooling and the northeast-southwest dipole. Processes leading to local and remote atmospheric responses to these SST anomalies are investigated using the Weather Research and Forecast (WRF) model. The atmosphere in direct contact with anomalous diabatic forcing exhibits a linear and symmetric response with respect to the sign, pattern, and magnitude of SST anomalies, producing increased (decreased) wind speed and precipitation response over warm (cold) SSTs. This local response is due to modulation of both the vertical stability of the marine atmospheric boundary layer and the adjustment of sea level pressure, although the latter provides a better explanation of the quadrature relationship between SST and wind speed. The linearity in the local response suggests the importance of fine-scale EJS SSTs to predictability of the regional weather and climate variability. The remote circulation response, in contrast, is strongly nonlinear. An intraseasonal equivalent barotropic ridge emerges in the Gulf of Alaska as a common remote response independent of EJS SST anomalies. This downstream blocking response is reinforced by the enhanced storm track variability east of Japan via transient eddy vorticity flux convergence. Strong nonlinearity in remote response implies that detailed EJS SST patterns may not be critical to this downstream ridge response. Overall, results demonstrate a remarkably far-reaching impact of the EJS SSTs on the atmospheric circulation. Key Points Atmospheric response to EJS SST is studied with a hemispheric WRF model EJS SST anomalies lead to a downstream equivalent barotropic high Synoptic transient eddies play a crucial role via vorticity flux convergence ©2013. American Geophysical Union. All Rights Reserved. 资助项目: NNX13AM59G
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/63068
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: Woods Hole Oceanographic Institution, Woods Hole MA, United States; Department of Oceanography, Kyungpook National University, Sangju, South Korea
Recommended Citation:
Seo H.,Kwon Y.-O.,Park J.-J.. On the effect of the East/Japan Sea SST variability on the North Pacific atmospheric circulation in a regional climate model[J]. Journal of Geophysical Research Atmospheres,2014-01-01,119(2)