Scopus记录号: 2-s2.0-85062718526
论文题名: An empirical adjusted ENSO ocean energetics framework based on observational wind power in the tropical Pacific
作者: Kodama K. ; Burls N.J.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2019
语种: 英语
英文关键词: ENSO
; ENSO energetics
; Ocean energetics
; Wind power
; Wind work
英文摘要: According to El Niño–Southern Oscillation (ENSO) energetics theory, the work done by the wind on the ocean, known as wind power, has a strong forcing relationship with ENSO sea surface temperature (SST) changes, wherein negative (positive) tropical Pacific wind power anomalies contribute to warm (cold) ENSO events. The ENSO energetics framework assumes a mean state characterized by easterly winds, westward currents and a thermocline shoaling from west to east such that positive zonal wind power anomalies will induce a La Niña state and negative anomalies will induce an El Niño state. In this study, tropical Pacific wind power is computed using satellite data and its correlations with Niño 3.4 SST anomalies evaluated and compared to the conventional dynamical predictors, namely warm water volume and wind stress. Analysis of the spatial and temporal structure of climatological wind power and its variability during individual ENSO events reveals sign inconsistencies in which certain wind power anomalies (e.g. those associated with westerly wind events in the far west) are positive despite forcing the system towards an El Niño state. These results show that the conventional ENSO energetics framework makes assumptions about the climatological state that are not always consistent with observations. We apply sign adjustments to the computation of a tropical Pacific wind power index that include the directional aspect of the wind power perturbations and find that these adjustments greatly enhance the lead correlations between wind power and Niño3.4 SST anomalies, which are now comparable to conventional dynamical predictors. © 2019, Springer-Verlag GmbH Germany, part of Springer Nature. 资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/122507
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Atmospheric, Oceanic, and Earth Sciences, George Mason University, Virginia 4400 University Dr., MS 2B3, Fairfax, VA 22030, United States
Recommended Citation:
Kodama K.,Burls N.J.. An empirical adjusted ENSO ocean energetics framework based on observational wind power in the tropical Pacific[J]. Climate Dynamics,2019-01-01