DOI: 10.1175/JCLI-D-14-00296.1
Scopus记录号: 2-s2.0-84919663654
论文题名: El niño flavors and their simulated impacts on atmospheric circulation in the high Southern latitudes
作者: Wilson A.B. ; Bromwich D.H. ; Hines K.M. ; Wang S.-H.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2014
卷: 27, 期: 23 起始页码: 8934
结束页码: 8955
语种: 英语
Scopus关键词: Atmospheric temperature
; Cams
; Climatology
; Computer simulation
; Mechanical waves
; Nickel
; Surface waters
; Tropics
; Anticyclonic flow
; Atmospheric circulation
; Eastern tropical pacific
; National center for atmospheric researches
; South pacific convergence zones
; Southern Hemisphere
; Southern latitudes
; Stationary wave patterns
; Oceanography
; air-sea interaction
; anticyclone
; atmospheric circulation
; convergence
; El Nino
; El Nino-Southern Oscillation
; jet stream
; numerical model
; Rossby wave
; sea surface temperature
; Southern Hemisphere
; temperature anomaly
; Atlantic Ocean
; Atlantic Ocean (South)
; Pacific Ocean
; Pacific Ocean (Central)
; Pacific Ocean (East)
; Pacific Ocean (South)
; Pacific Ocean (Tropical)
英文摘要: Two El Niño flavors have been defined based on whether warm sea surface temperature (SST) anomalies are located in the central or eastern tropical Pacific (CP or EP). This study further characterizes the impacts on atmospheric circulation in the high latitudes of the Southern Hemisphere associated with these types of El Niño events though a series of numerical simulations using the National Center for Atmospheric Research Community Atmosphere Model (CAM). Comparing results with the Interim ECMWF Re-Analysis (ERAInterim), CAM simulates well the known changes to blocking over Australia and a southward shift in the subtropical jet stream across the eastern Pacific basin during CP events. More importantly for the high southern latitudes, CAM simulates a westward shift in upper-level divergence in the tropical Pacific, which causes the Pacific-South American stationary wave pattern to shift toward the west across the entire South Pacific. These changes to the Rossby wave source region impact the South Pacific convergence zone and jet streams and weaken the high-latitude blocking that is typically present in the Amundsen-Bellingshausen Seas during EP events. Anticyclonic flow becomes established farther west in the south central Pacific, modifying high-latitude heat and momentum fluxes across the South Pacific and South Atlantic associated with the ENSO-Antarctic dipole. © 2014 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/51407
Appears in Collections: 气候变化事实与影响
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作者单位: Polar Meteorology Group, Byrd Polar Research Center, The Ohio State University, Columbus, OH, United States; Atmospheric Sciences Program, Department of Geography, The Ohio State University, Columbus, OH, United States
Recommended Citation:
Wilson A.B.,Bromwich D.H.,Hines K.M.,et al. El niño flavors and their simulated impacts on atmospheric circulation in the high Southern latitudes[J]. Journal of Climate,2014-01-01,27(23)