DOI: 10.1175/JCLI-D-14-00227.1
Scopus记录号: 2-s2.0-84921647236
论文题名: Equatorial pacific easterly wind surges and the onset of La Niña events
作者: Chiodi A.M. ; Harrison D.E.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2015
卷: 28, 期: 2 起始页码: 776
结束页码: 792
语种: 英语
Scopus关键词: Atmospheric pressure
; Atmospheric temperature
; Climatology
; Oceanography
; Surface waters
; Waveguides
; Wind stress
; Buoy measurements
; Equatorial Pacific
; Neutral conditions
; Ocean general circulation models
; Oceanic waveguide
; Sea surface temperature anomalies
; Southern oscillation
; Waveguide surfaces
; Nickel
; easterly wave
; El Nino-Southern Oscillation
; La Nina
; oceanic general circulation model
; synoptic meteorology
; westerly
; wind field
; wind stress
; zonal wind
; Pacific Ocean
; Pacific Ocean (Equatorial)
; Pacific Ocean (Tropical)
英文摘要: The processes responsible for the onset of La Niña events have not received the same attention as those responsible for the onset of El Niño events, for which westerly wind events (WWEs) in the tropical Pacific have been identified as important contributors. Results here show that synoptic-scale surface easterly wind surges (EWSs) play an important role in the onset of La Niña events, akin to the role ofWWEsin the onset of El Niño events. It is found that EWSs are a substantial component of zonal wind stress variance along the equatorial Pacific. Using reanalysis wind stress fields, validated against buoy measurements, 340 EWS events are identified between 1986 and 2012. Their distributions in space, time, and El Niño-Southern Oscillation (ENSO) state are described. About 150 EWSs occur during ENSO-neutral conditions, during the months associated with La Niña initiation and growth (April-December). Composites of changes in sea surface temperature anomaly (SSTA) following these ~150 events show statistically significant cooling (0.1°-0.4°C) along the oceanic waveguide that persists for 2-3 months following the EWSs. Experiments with EWS forcing of an ocean general circulation model show SSTA patterns like those in the observations. It is suggested that EWSs play an important role in the onset of La Niña waveguide surface cooling and deserve additional study. © 2015 American Meteorological Society. 资助项目: DOC, U.S. Department of Commerce
; NOAA, U.S. Department of Commerce
; NOAA, U.S. Department of Commerce
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/50513
Appears in Collections: 气候变化事实与影响
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作者单位: Joint Institute for the Study of the Atmosphere and Ocean, University of Washington, NOAA/Pacific Marine Environmental Laboratory, Seattle, WA, United States
Recommended Citation:
Chiodi A.M.,Harrison D.E.. Equatorial pacific easterly wind surges and the onset of La Niña events[J]. Journal of Climate,2015-01-01,28(2)