DOI: 10.1175/JCLI-D-14-00450.1
Scopus记录号: 2-s2.0-84961291446
论文题名: A Rossby wave bridge from the tropical Atlantic to West Antarctica
作者: Li X. ; Gerber E.P. ; Holland D.M. ; Yoo C.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2015
卷: 28, 期: 6 起始页码: 2256
结束页码: 2273
语种: 英语
Scopus关键词: Atmospheric temperature
; Atmospheric thermodynamics
; Ocean currents
; Oceanography
; Ray tracing
; Submarine geophysics
; Surface waters
; Tropics
; Annular mode
; Atmosphere-ocean interactions
; Multidecadal variability
; Rossby wave
; Teleconnections
; Trends
; Mechanical waves
; air-sea interaction
; Atlantic Multidecadal Oscillation
; jet
; Rossby wave
; sea surface temperature
; Southern Hemisphere
; trend analysis
; Amundsen Sea
; Antarctica
; Atlantic Ocean
; Atlantic Ocean (Tropical)
; Bellingshausen Sea
; Southern Ocean
; West Antarctica
英文摘要: Tropical Atlantic sea surface temperature changes have recently been linked to circulation anomalies around Antarctica during austral winter. Warming in the tropical Atlantic associated with the Atlantic multidecadal oscillation forces a positive response in the southern annular mode, strengthening the Amundsen- Bellingshausen Sea low in particular. In this study, observational and reanalysis datasets and a hierarchy of atmospheric models are used to assess the seasonality and dynamical mechanism of this teleconnection. Both the reanalyses and models reveal a robust link between tropical Atlantic SSTs and the Amundsen- Bellingshausen Sea low in all seasons except austral summer. A Rossby wave mechanism is then shown to both explain the teleconnection and its seasonality. Themechanisminvolves both changes in the excitation ofRossby wave activitywith season and the formation of aRossbywaveguide across the Pacific,which depends critically on the strength and extension of the subtropical jet over the west Pacific. Strong anticyclonic curvature on the poleward flank of the jet creates a reflecting surface, channeling quasi-stationary Rossby waves from the subtropical Atlantic to the Amundsen-Bellingshausen Sea region. In summer, however, the jet is weaker than in other seasons and no longer able to keep Rossby wave activity trapped in the Southern Hemisphere. The mechanism is supported by integrations with a comprehensive atmospheric model, initial-value calculations with a primitive equation model on the sphere, and Rossby wave ray tracing analysis. © 2015 American Meteorological Society. 资助项目: NSF, National Aeronautics and Space Administration
; NSF, National Aeronautics and Space Administration
; NASA, National Aeronautics and Space Administration
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/50677
Appears in Collections: 气候变化事实与影响
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作者单位: Center for Atmospheric and Oceanic Science, Courant Institute of Mathematical Sciences, New York University, New York, NY, United States; Scripps Institution of Oceanography, University of California, San Diego, La Jolla, CA, United States; Department of Atmospheric Science and Engineering, Ewha Womans University, Seoul, South Korea
Recommended Citation:
Li X.,Gerber E.P.,Holland D.M.,et al. A Rossby wave bridge from the tropical Atlantic to West Antarctica[J]. Journal of Climate,2015-01-01,28(6)