DOI: 10.1175/JCLI-D-14-00404.1
Scopus记录号: 2-s2.0-84922805667
论文题名: A further study of ENSO rectification: Results from an OGCM with a seasonal cycle
作者: Hua L. ; Yu Y. ; Sun D.-Z.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2015
卷: 28, 期: 4 起始页码: 1362
结束页码: 1382
语种: 英语
Scopus关键词: Oceanography
; Wind stress
; Climate anomalies
; Eastern equatorial Pacific
; Rectification effects
; Seasonal cycle
; Spatial patterns
; Western Pacific Warm Pool
; Wind anomalies
; Wind forcing
; Climatology
; air-sea interaction
; El Nino-Southern Oscillation
; oceanic general circulation model
; seasonal variation
; warm pool
; wind forcing
; wind stress
; Pacific Ocean
; Pacific Ocean (Equatorial)
; Pacific Ocean (West)
英文摘要: The potential role that rectification of ENSO plays as a viable mechanism to generate climate anomalies on the decadal and longer time scales demands a thorough study of this process. In this paper, rectification of ENSO was studied using an ocean GCM that has a realistic seasonal cycle. In addition to conducting a pair of forced ocean GCM experiments with and without ENSO fluctuations, as done in a previous study, a forced experiment was also conducted with the sign of wind anomalies reversed, with the goal of clarifying the role of the asymmetry in the wind forcing and more generally to better understand the nonlinear dynamics responsible for the rectification. It is found that the rectification effect of ENSO is to cool the western Pacific warm pool and warm the eastern equatorial Pacific. Further, it is found that when the sign of the wind stress anomalies is reversed the impact of the rectification on the mean state remains almost unchanged. This lack of change is further explained by noting that the upper-ocean temperature and velocity anomalies (T', u', y', and w') are found to respond to the wind stress anomalies linearly, except for the strongest El Niño years. Thus, the correlation between T' and (u', y', w') [and thus the nonlinear dynamical heating (NDH)] remains the same when the sign of the wind stress anomalies is reversed. Indeed, the spatial patterns of NDH in all four seasons are found to resemble the rectified effect of ENSO in the mean temperature field in the respective seasons, indicating the critical role of NDH in the rectification. © 2015 American Meteorological Society. 资助项目: NOAA, National Oceanic and Atmospheric Administration
; NSF, National Oceanic and Atmospheric Administration
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/50699
Appears in Collections: 气候变化事实与影响
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作者单位: State Key Laboratory of Numerical Modeling for Atmospheric Sciences, Geophysical Fluid Dynamics (LASG), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China; College of Earth Science, University of Chinese Academy of Sciences, Beijing, China; Cooperative Institute for Research in Environmental Sciences, University of Colorado and NOAA/ESRL, Boulder, CO, United States
Recommended Citation:
Hua L.,Yu Y.,Sun D.-Z.. A further study of ENSO rectification: Results from an OGCM with a seasonal cycle[J]. Journal of Climate,2015-01-01,28(4)