DOI: 10.1175/JCLI-D-16-0868.1
Scopus记录号: 2-s2.0-85040933902
论文题名: ENSO effects on annual variations of summer precipitation stable isotopes in Lhasa, southern Tibetan Plateau
作者: Gao J. ; He Y. ; Masson-Delmotte V. ; Yao T.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2018
卷: 31, 期: 3 起始页码: 1173
结束页码: 1182
语种: 英语
英文关键词: Annual variations
; Atmospheric circulation
; ENSO
; General circulation models
; Indian Ocean
; Teleconnections
Scopus关键词: Atmospheric pressure
; Atmospheric temperature
; Climate change
; Earth atmosphere
; Isotopes
; Moisture
; Nickel
; Nickel compounds
; Oceanography
; Surface waters
; Annual variations
; Atmospheric circulation
; ENSO
; General circulation model
; Indian ocean
; Teleconnections
; Climatology
; annual variation
; atmospheric circulation
; El Nino-Southern Oscillation
; general circulation model
; isotopic composition
; oxygen isotope
; precipitation (climatology)
; stable isotope
; summer
; teleconnection
; Arabian Sea
; Bay of Bengal
; China
; Indian Ocean
; Lhasa
; Qinghai-Xizang Plateau
; Xizang
英文摘要: Although El Niño-Southern Oscillation (ENSO) influences the Indian summer monsoon, its impact on moisture transport toward the southern Tibetan Plateau (TP) remains poorly understood. Precipitation stable isotopes are useful indices for climate change in the TP. Classical interpretations of variations of precipitation stable isotopes focus on the local surface air temperature or precipitation amount. However, several of the latest studies suggested they may correlate with large-scale modes of variability, such as ENSO. This paper presents a detailed study of ENSO's effect on annual variations of the oxygen stable isotopic composition of precipitation (δ18Op) at Lhasa in the southern TP for up to 10 years. The stable isotopic composition of water vapor from satellite data [Tropospheric Emission Spectrometer (TES)] and simulations from an isotopically enabled atmospheric general circulation model (zoomed LMDZiso) are used to explore the mechanism that leads to variations of d18Op at Lhasa. Statistically significant correlations between δ18Op and ENSO indices [Southern Oscillation index (SOI) and Niño-3.4 sea surface temperature index (Niño-3.4)] are observed. This paper shows that ENSO's effects on the location and intensity of convection over the Arabian Sea, the Bay of Bengal, and the tropical Indian Ocean, along moisture transport paths toward Lhasa, further impact convection from the northern Tibetan Plateau. The changing of this convection results in lower δ18Op at Lhasa in 2007, a La Niña year, and higher d18Op in 2006, an El Niño year. The study presented here confirms that the regional upstream convection related to ENSO teleconnections plays an important role in variations of d18Op at the interannual scale and that the more depleted oxygen stable isotopic composition of vapor (δ18Oν) from the northwestern region of India during a La Niña year intensifies the lower d18Op at Lhasa in a La Niña year. The study's results have implications for the interpretation of past variations of archives with precipitation stable isotopes, such as ice cores, tree rings, lake sediments, and speleothems, in this region. © 2018 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/111690
Appears in Collections: 气候减缓与适应
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作者单位: Key Laboratory of Tibetan Environment Changes and Land Surface Processes, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing, China; Center for Excellence in Tibetan Plateau Earth Sciences, Chinese Academy of Sciences, Beijing, China; LSCE, UMR 8212 CEA/CNRS/UVSQ-IPSL, Gif-sur-Yvette, France
Recommended Citation:
Gao J.,He Y.,Masson-Delmotte V.,et al. ENSO effects on annual variations of summer precipitation stable isotopes in Lhasa, southern Tibetan Plateau[J]. Journal of Climate,2018-01-01,31(3)