DOI: 10.1175/JCLI-D-11-00111.1
Scopus记录号: 2-s2.0-84859344805
论文题名: Role of the Indian Ocean in the ENSO-Indian summer monsoon teleconnection in the NCEP climate forecast system
作者: Achuthavarier D. ; Krishnamurthy V. ; Kirtman B.P. ; Huang B.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2012
卷: 25, 期: 7 起始页码: 2490
结束页码: 2508
语种: 英语
Scopus关键词: Atmosphere-ocean interactions
; Atmospheric fluxes
; Climate forecasts
; Coupled models
; Dipole patterns
; ENSO
; ENSO signal
; Indian monsoon
; Indian ocean
; Indian summer monsoon
; Interannual variability
; Low-level winds
; Monsoon season
; National centers for environmental predictions
; Negative correlation
; Positive feedback loop
; Sea surface temperature (SST)
; SST anomalies
; Subsurface temperature
; Summer monsoon
; Surface pressures
; Teleconnections
; Atmospheric pressure
; Atmospheric thermodynamics
; Climate change
; Computer simulation
; Forecasting
; Nickel compounds
; Climate models
; air-sea interaction
; annual variation
; atmosphere-ocean coupling
; El Nino-Southern Oscillation
; feedback mechanism
; monsoon
; sea surface temperature
; summer
; teleconnection
; thermocline
; weather forecasting
; Indian Ocean
英文摘要: The observed negative correlation between El Niño-Southern Oscillation (ENSO) and the Indian summer monsoon is not simulated by the National Centers for Environmental Prediction (NCEP) Climate Forecast System (CFS) coupled model. The correlation is partially restored in the simulations where the Indian Ocean (IO) sea surface temperature (SST) is prescribed with the daily mean or climatology. Comparison among the simulations suggests that ENSO-induced SST anomalies form a strong dipole pattern oriented along the zonal direction in the IO in the coupled model, preventing the ENSO signals from reaching the Indian monsoon region. In the model, the dipole develops early in the monsoon season and extends to the central equatorial IO while it is formed at the end of the season in observations. The dipole modifies low-level winds and surface pressure, and grows in a positive feedback loop involving winds, surface pressure, and SST. Examination of themean state in themodel reveals that the thermocline is relatively shallow in the eastern IO. This preconditions the ocean such that the atmospheric fluxes can easily impart fluctuations in the subsurface temperature and thereby in the SST. These results suggest that biases in the IO can adversely affect the ENSO-monsoon teleconnection in a coupled model. © 2012 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/52475
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, Fairfax, VA, United States; Center for Ocean-Land-Atmosphere Studies, Institute of Global Environment and Society, Calverton, MD, United States; Rosenstiel School of Marine and Atmospheric Science, University of Miami, Miami, FL, United States; Universities Space Research Association, Columbia, MD, United States
Recommended Citation:
Achuthavarier D.,Krishnamurthy V.,Kirtman B.P.,et al. Role of the Indian Ocean in the ENSO-Indian summer monsoon teleconnection in the NCEP climate forecast system[J]. Journal of Climate,2012-01-01,25(7)