DOI: 10.1175/JCLI-D-11-00378.1
Scopus记录号: 2-s2.0-84862528070
论文题名: Impact of tropical SST on stratospheric planetary waves in the southern hemisphere
作者: Lin P. ; Fu Q. ; Hartmann D.L.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2012
卷: 25, 期: 14 起始页码: 5030
结束页码: 5046
语种: 英语
Scopus关键词: Austral spring
; Chemistry-climate models
; Circulation anomalies
; Eliassen-Palm flux
; Extratropical
; Interannual variability
; Maximum covariance analysis
; Planetary wave activity
; Planetary Waves
; Positive polarity
; Reanalysis
; Sea surface temperature (SST)
; Southern Hemisphere
; SST anomalies
; Stationary waves
; Stratospheric circulations
; Tropospheric circulation
; Wave activity
; Climate change
; Nickel compounds
; Regression analysis
; Troposphere
; Tropics
; air-sea interaction
; annual variation
; atmospheric circulation
; El Nino-Southern Oscillation
; La Nina
; planetary wave
; regression analysis
; sea surface temperature
; Southern Hemisphere
; standing wave
; stratosphere
; stratosphere-troposphere interaction
; troposphere
; Pacific Ocean
; Pacific Ocean (Central)
英文摘要: The impact of tropical sea surface temperature (SST) on stratospheric planetary waves in the Southern Hemisphere (SH) is investigated in austral spring using observed SST and reanalysis data for the past three decades. Maximum covariance analysis indicates that the tropical SST and the SH stratospheric planetary wave activity are primarily coupled through two modes. The leading two modes show the La Niña-like and the central-Pacific El Niño-like SST anomalies in their positive polarities, respectively, which each are related to enhanced stratospheric planetary wave activity. These two modes also introduce phase shifts to the stratospheric stationary planetary waves: a westward shift is seen for La Niña and an eastward shift for warm SST anomalies is seen in the central Pacific. The Eliassen-Palm fluxes associated with the two modes indicate that the anomalous stratospheric wave activity originates in the troposphere and propagates upward over the mid-high latitudes, so that the linkages between tropical SST and extratropical tropospheric circulation appear to play a key role. Furthermore, the observed circulation anomaly patterns for the two modes change rapidly from spring to summer, consistent with a sharp seasonal transition in the SH basic state. Similar SST and circulation anomaly patterns associated with the two modes are simulated in chemistry-climate models. © 2012 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/52309
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Atmospheric Sciences, University of Washington, Seattle, WA, United States
Recommended Citation:
Lin P.,Fu Q.,Hartmann D.L.. Impact of tropical SST on stratospheric planetary waves in the southern hemisphere[J]. Journal of Climate,2012-01-01,25(14)