DOI: 10.1002/2014GL059987
论文题名: Tropical influence independent of ENSO on the austral summer Southern Annular Mode
作者: Ding H. ; Greatbatch R.J. ; Gollan G.
刊名: Geophysical Research Letters
ISSN: 0094-10052
EISSN: 1944-9783
出版年: 2014
卷: 41, 期: 10 起始页码: 3643
结束页码: 3648
语种: 英语
英文关键词: Southern Annular Mode
Scopus关键词: Atmospheric pressure
; Global warming
; Atmospheric variability
; Geo-potential heights
; Interannual variability
; Long-term trend
; Positive/negative
; Sea surface temperature variability
; Southern Annular Mode
; Southern oscillation
; Tropics
; annual variation
; data set
; El Nino-Southern Oscillation
; global warming
; summer
; westerly
英文摘要: A link between atmospheric variability in the tropics independent of ENSO and the Southern Annular Mode (SAM) is found based on seasonal mean data for austral summer. Variations associated with El Niño Southern Oscillation (ENSO) are removed using a linear method, and a Tropics Index (TI) is defined as the zonal average of the ENSO-removed 500 hPa geopotential height between 10°S and 10°N. Since the detrended TI shows no link to sea surface temperature variability in the tropics, it appears to be related to internal atmospheric variability. We find that the TI can explain about 40% variance of the SAM interannual variability and about 75% of the SAM long-term trend between 1957/1958 and 2001/2002, where here the SAM includes the ENSO signal. Positive/negative values of the TI are associated with the positive/negative SAM. A possible link between the TI and global warming is noted. © 2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84902245171&doi=10.1002%2f2014GL059987&partnerID=40&md5=56a09c13c69192ca08287d62711ee262
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7316
Appears in Collections: 气候减缓与适应
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作者单位: GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany
Recommended Citation:
Ding H.,Greatbatch R.J.,Gollan G.. Tropical influence independent of ENSO on the austral summer Southern Annular Mode[J]. Geophysical Research Letters,2014-01-01,41(10).