DOI: 10.1002/grl.50200
论文题名: Triggering of El Niño onset through trade wind-induced charging of the equatorial Pacific
作者: Anderson B.T. ; Perez R.C. ; Karspeck A.
刊名: Geophysical Research Letters
ISSN: 0094-9228
EISSN: 1944-8959
出版年: 2013
卷: 40, 期: 6 起始页码: 1212
结束页码: 1216
语种: 英语
英文关键词: Atmospheric forcing
; ENSO
; Numerical modeling
Scopus关键词: Atmospheric forcing
; Charging mechanism
; ENSO
; Equatorial Pacific
; Historical observation
; Ocean heat content
; Sea level pressure
; Sea surface temperature (SST)
; Atmospheric temperature
; Electric charge
; Enthalpy
; Numerical models
; Sea level
; Commerce
; atmospheric forcing
; data set
; El Nino-Southern Oscillation
; heat balance
; numerical model
; resolution
; sea level pressure
; visualization
; wind velocity
; Pacific Ocean
英文摘要: Sea surface temperature variations over the equatorial Pacific associated with the El Niño/Southern Oscillation (ENSO) produce changes in climates across the globe. Here we report evidence from observationally constrained ocean data for the initiation of warm ENSO events (El Niños) resulting from subsurface equatorial Pacific heat content increases related to tropical/extratropical sea level pressure (SLP) changes over the North Pacific. We hypothesize that the increase in heat content is a response to SLP-generated variations in the North Pacific trade winds, which we term trade wind charging of the equatorial Pacific. Experiments using a high-resolution numerical ocean model verify that the charging of subsurface heat content along the equatorial Pacific can be induced by SLP-generated trade wind variations. Furthermore, analysis of the numerical model results and historical observations indicates that the trade wind-induced ocean heat content increases are sufficiently large to initiate the onset of El Niño events, which mature approximately 12 months after the trade wind forcing itself. Key Points Subtropical SLP-induced trade wind changes increase Eq. Pacific heat content Trade wind charging of equatorial Pacific can trigger El Niño onset Trade wind charging mechanism revealed through detailed animated visualizations. ©2013 American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84876938794&doi=10.1002%2fgrl.50200&partnerID=40&md5=2527deb602d73a632ecf57b2bb613765
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6492
Appears in Collections: 气候减缓与适应
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作者单位: Department of Earth and Environment, Boston University, 675 Commonwealth Ave., Boston, MA 02215, United States
Recommended Citation:
Anderson B.T.,Perez R.C.,Karspeck A.. Triggering of El Niño onset through trade wind-induced charging of the equatorial Pacific[J]. Geophysical Research Letters,2013-01-01,40(6).