DOI: 10.1175/JCLI-D-11-00320.1
Scopus记录号: 2-s2.0-84861395620
论文题名: ENSO's impact on the gap wind regions of the Eastern Tropical Pacific Ocean
作者: Alexander M.A. ; Seo H. ; Xie S.P. ; Scott J.D.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2012
卷: 25, 期: 10 起始页码: 3549
结束页码: 3565
语种: 英语
Scopus关键词: Atmosphere-ocean interactions
; ENSO
; North Pacific Ocean
; Ocean model
; oceanic
; Thermocline circulation
; Boundary conditions
; Coastal zones
; Computer simulation
; Nickel compounds
; Ocean currents
; Surface measurement
; Waves
; Stream flow
; atmosphere-hydrosphere interaction
; Ekman pumping
; Ekman transport
; El Nino-Southern Oscillation
; heat transfer
; Kelvin wave
; modeling
; oceanic circulation
; Rossby wave
; sea surface temperature
; surface flux
; temperature anomaly
; thermocline
; wave propagation
; wind-wave interaction
; Pacific Ocean
; Pacific Ocean (North)
; Pacific Ocean (Tropical)
; Sesbania sericea
英文摘要: The recently released NCEP Climate Forecast System Reanalysis (CFSR) is used to examine the response to ENSO in the northeast tropical Pacific Ocean (NETP) during 1979-2009. The normally cool Pacific sea surface temperatures (SSTs) associated with wind jets through the gaps in the Central American mountains at Tehuantepec, Papagayo, and Panama are substantially warmer (colder) than the surrounding ocean during El Niño (La Niña) events. Ocean dynamics generate the ENSO-related SST anomalies in the gap wind regions as the surface fluxes damp the SSTs anomalies, while the Ekman heat transport is generally in quadrature with the anomalies. The ENSO-driven warming is associated with large-scale deepening of the thermocline; with the cold thermocline water at greater depths during El Niñ o in the NETP, it is less likely to be vertically mixed to the surface, particularly in the gap wind regions where the thermocline is normally very close to the surface. The thermocline deepening is enhanced to the south of the Costa Rica Dome in the Papagayo region, which contributes to the local ENSO-driven SST anomalies. The NETP thermocline changes are due to coastal Kelvin waves that initiate westward-propagating Rossby waves, and possibly ocean eddies, rather than by local Ekman pumping. These findings were confirmed with regional ocean model experiments: only integrations that included interannually varying ocean boundary conditions were able to simulate the thermocline deepening and localized warming in the NETP during El Niño events; the simulation with variable surface fluxes, but boundary conditions that repeated the seasonal cycle, did not. © 2012 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/52410
Appears in Collections: 气候变化事实与影响
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作者单位: NOAA/Earth System Research Laboratory, Boulder, CO, United States; Woods Hole Oceanographic Institution, Woods Hole, MA, United States; International Pacific Research Center, Department of Meteorology, University of Hawaii at Manoa, Honolulu, HI, United States; Cooperative Institute for Research in Environmental Sciences, University of Colorado, NOAA/Earth System Research Laboratory, Boulder, CO, United States
Recommended Citation:
Alexander M.A.,Seo H.,Xie S.P.,et al. ENSO's impact on the gap wind regions of the Eastern Tropical Pacific Ocean[J]. Journal of Climate,2012-01-01,25(10)