Document Type

Article

Publication Title

Annals of Glaciology

Publisher

International Glaciology Society

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This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. In addition, no permission is required from the rights-holder(s) for educational uses. For other uses, you need to obtain permission from the rights-holder(s).

Publication Date

2000

First Page

153

Last Page

158

Issue Number

1

Volume Number

31

Abstract/ Summary

Comparison of the terminus locations of Rongbuk Glacier, Mount Everest, measured in 1966 and 1997 shows that in the past 30 years the glacier has retreated 170-270 m, equivalent to a retreat speed of 5.5-8.7 m a−1. During summer 1997, a 15 m firn core was recovered from Dasuopu glacier (28°23′N, 85°44′E; 7000 m a.s.l.) on the northwest margin of Xixabangma Feng, Xizang (Tibet). The seasonal variations of δ18O values in the core indicate that monsoon signals are clearly recorded in the glacier. δ18O values are controlled by the amount effect in the monsoon season; more negative δ18O is representative of the monsoon season in snow layers. Analysis of the relationship between ice-core δ18O, sampled from 6500 m a.s.l. on the north side of Mount Everest, and instrumental series representing regional-scale precipitation, atmospheric circulation and temperature suggests a change in the relative influence of these parameters on δ18O since the 1940s. The results of the comparison add to and lengthen the sparse array of instrument data available for the Tibetan (Qinghai-Xizang) Plateau and demonstrate a recent decline in moisture flux for at least the southern part of the plateau. Glacier retreat, associated with a recent increase in temperature in the region, is coincident with this period of decreased moisture flux.

Citation/Publisher Attribution

Dahe, Q., Mayewski, P. A., Wake, C. P., Shichang, K., Jiawen, R., Shugui, H., Tandong, Y., Qinzhao, Y., Zhefan, J., & Desheng, M. (2000). Evidence for recent climate change from ice cores in the central Himalayas, Annals of Glaciology 31(1), 153-158.

Publisher Statement

© Copyright 2000 International Glaciological Society

DOI

10.3189/172756400781819789

Version

publisher's version of the published document

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In Copyright - Educational Use Permitted.