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DOI	10.5194/tc-8-289-2014
	Influence of regional precipitation patterns on stable isotopes in ice cores from the central Himalayas
	Pang H.; Hou S.; Kaspari S.; Mayewski P.A.
发表日期	2014
ISSN	19940416
卷号	8 期号:1
英文摘要	Several ice cores have been recovered from the Dasuopu (DSP) Glacier and the East Rongbuk (ER) Glacier in the central Himalayas since the 1990s. Although the distance between the DSP and the ER ice core drilling sites is only ∼ 125 km, the stable isotopic record (δ18O or δD) of the DSP core is interpreted in previous studies as a temperature proxy, while the ER core is interpreted as a precipitation proxy. Thus, the climatological significance of the stable isotopic records of these Himalayan ice cores remains a subject of debate. Based on analysis of regional precipitation patterns over the region, we find that remarkable discrepancy in precipitation seasonality between the two sites may account for their disparate isotopic interpretations. At the ER core site, the Indian summer monsoon (ISM) precipitation is dominating due to topographic blocking of the moisture from westerlies by the high ridges of Mt. Qomolangma (Everest), which results in a negative correlation between the ER Δ18O or δD record and precipitation amount along the southern slope of the central Himalayas in response to the "amount effect". At the DSP core site, in comparison with the ISM precipitation, the wintertime precipitation associated with the westerlies is likely more important owing to its local favorable topographic conditions for interacting with the western disturbances. Therefore, the DSP stable isotopic record may be primarily controlled by the westerlies. Our results have important implications for interpreting the stable isotopic ice core records recovered from different climatological regimes of the Himalayas.
学科领域	ice core; precipitation (climatology); proxy climate record; regional climate; stable isotope; China; Dasuopu Glacier; Himalayas; Rongbuk Glacier; Xizang
语种	英语
scopus关键词	ice core; precipitation (climatology); proxy climate record; regional climate; stable isotope; China; Dasuopu Glacier; Himalayas; Rongbuk Glacier; Xizang
来源期刊	Cryosphere
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/120152
作者单位	Key Laboratory of Coast and Island Development of Ministry of Education, School of Geographic and Oceanographic Sciences, Nanjing University, Nanjing 210093, China; Department of Geological Sciences, Central Washington University, Ellensburg, WA 98926, United States; Climate Change Institute and Department of Earth Sciences, University of Maine, Orono, ME 04469, United States
推荐引用方式 GB/T 7714	Pang H.,Hou S.,Kaspari S.,et al. Influence of regional precipitation patterns on stable isotopes in ice cores from the central Himalayas[J],2014,8(1).
APA	Pang H.,Hou S.,Kaspari S.,&Mayewski P.A..(2014).Influence of regional precipitation patterns on stable isotopes in ice cores from the central Himalayas.Cryosphere,8(1).
MLA	Pang H.,et al."Influence of regional precipitation patterns on stable isotopes in ice cores from the central Himalayas".Cryosphere 8.1(2014).