DOI: 10.1002/2017JD027755
Scopus记录号: 2-s2.0-85046128910
论文题名: Possible ENSO Influences on the Northwestern Tibetan Plateau Revealed by Annually Resolved Ice Core Records
作者: Yang X. ; Yao T. ; Deji ; Zhao H. ; Xu B.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2018
卷: 123, 期: 8 起始页码: 3857
结束页码: 3870
语种: 英语
英文关键词: ENSO
; ice core δ18O
; northwestern Tibetan Plateau
; teleconnection
; tropical oceans
Scopus关键词: atmospheric circulation
; El Nino-Southern Oscillation
; enrichment
; ice core
; Indian Ocean Dipole
; meridional circulation
; oxygen isotope
; precipitation (climatology)
; sea surface temperature
; teleconnection
; tropical meteorology
; China
; Indian Ocean
; Indian Ocean (West)
; Pacific Ocean
; Pacific Ocean (Northwest)
; Pacific Rim
; Pamirs
; Qinghai-Xizang Plateau
英文摘要: Two annually resolved ice core records, one drilled on Mutztagata (7,000 m above sea level) on the western slope (dated 1952–2002) and the other drilled on Kuokuosele (5,600 m above sea level) on the southwestern slope (dated 1900–2010) of the Pamir Plateau of the northwestern Tibetan Plateau (TP), were selected to study possible El Niño–Southern Oscillation (ENSO) influences on the northwestern TP. δ18O at KKSL was more enriched, though both records varied in phase. Eight of the 10 noticeably strong El Niño events since 1955 corresponded to δ18O depletions in both ice core records, which were followed by δ18O enrichment. Atmospheric circulation indices, including water vapor flux and divergence, had a coincidence of a positive Indian Ocean Dipole mode with El Niño events, which contributed to the northward transport of southerly flows from the western Indian Ocean; its convergence with midlatitude wind flows at high levels depleted δ18O levels. The meridional shift in the Asian-Pacific subtropical high induced by latent heat release due to precipitation in the northwestern Pacific was found to play an important role in initiating convergence. A statistical analysis confirmed the significant correlations in δ18O with the ENSO index and tropical and subtropical summer monsoon circulations. We noted that the dominant circulation pattern over the northwestern TP was characterized by a midlatitude flow regime that had a teleconnection with tropical sea surface temperatures. Therefore, ENSO is one of a variety of influences on ice core δ18O on the TP. ©2018. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/114061
Appears in Collections: 气候减缓与适应
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作者单位: CAS Key Laboratory of Tibetan Environmental Changes and Land Surface Processes, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing, China; CAS Center for Excellence in Tibetan Plateau Earth Sciences, Beijing, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, China
Recommended Citation:
Yang X.,Yao T.,Deji,et al. Possible ENSO Influences on the Northwestern Tibetan Plateau Revealed by Annually Resolved Ice Core Records[J]. Journal of Geophysical Research: Atmospheres,2018-01-01,123(8)