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Possible ENSO Influences on the Northwestern Tibetan Plateau Revealed by Annually Resolved Ice Core Records
Yang, XX (Yang, Xiaoxin)1,2; Yao, TD (Yao, Tandong)1,2; Deji (Deji)1,3; Zhao, HB (Zhao, Huabiao)1; Xu, BQ (Xu, Baiqing)1,2
Source PublicationJOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
2018-04-27
Volume123Issue:8Pages:3857-3870
DOI10.1002/2017JD027755
Abstract

Two annually resolved ice core records, one drilled on Mutztagata (7,000m above sea level) on the western slope (dated 1952-2002) and the other drilled on Kuokuosele (5,600m 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 Nino-Southern Oscillation (ENSO) influences on the northwestern TP. O-18 at KKSL was more enriched, though both records varied in phase. Eight of the 10 noticeably strong El Nino events since 1955 corresponded to O-18 depletions in both ice core records, which were followed by O-18 enrichment. Atmospheric circulation indices, including water vapor flux and divergence, had a coincidence of a positive Indian Ocean Dipole mode with El Nino 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 O-18 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 O-18 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 O-18 on the TP.

Subject Area地理学
WOS IDWOS:000433071200002
Language英语
Indexed BySCIE
KeywordIndian-summer Monsoon Objective Definition Isotope Composition Air-temperature Asian Monsoon Precipitation Variability Sea Perspective Delta-o-18
WOS Research AreaMeteorology & Atmospheric Sciences
WOS SubjectMeteorology & Atmospheric Sciences
Cooperation Status国内
ISSN2169-897X
Department环境变化与地表过程重点实验室
PublisherAMER GEOPHYSICAL UNION
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.itpcas.ac.cn/handle/131C11/8672
Collection图书馆
Corresponding AuthorYang, XX (Yang, Xiaoxin)
Affiliation1.Chinese Acad Sci, Inst Tibetan Plateau Res, CAS Key Lab Tibetan Environm Changes & Land Surf, Beijing, Peoples R China;
2.CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing, Peoples R China;
3.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing, Peoples R China.
Recommended Citation
GB/T 7714
Yang, XX ,Yao, TD ,Deji ,et al. Possible ENSO Influences on the Northwestern Tibetan Plateau Revealed by Annually Resolved Ice Core Records[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2018,123(8):3857-3870.
APA Yang, XX ,Yao, TD ,Deji ,Zhao, HB ,&Xu, BQ .(2018).Possible ENSO Influences on the Northwestern Tibetan Plateau Revealed by Annually Resolved Ice Core Records.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,123(8),3857-3870.
MLA Yang, XX ,et al."Possible ENSO Influences on the Northwestern Tibetan Plateau Revealed by Annually Resolved Ice Core Records".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 123.8(2018):3857-3870.
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