玉龙雪山冰川稳定同位素分馏冬夏对比

doi:10.11821/xb200605006

地理学报 ›› 2006, Vol. 61 ›› Issue (5): 501-509.doi: 10.11821/xb200605006

玉龙雪山冰川稳定同位素分馏冬夏对比

庞洪喜¹, 何元庆^1,2, 卢爱刚¹, 赵井东¹, 宁宝英¹, 院玲玲¹, 宋波¹, 张宁宁¹

1. 中国科学院寒区旱区环境与工程研究所冰冻圈与环境联合重点实验室,兰州 730000;
2. 中国科学院青藏高原研究所,北京 100029

收稿日期:2005-11-30 修回日期:2006-03-07 出版日期:2006-05-25 发布日期:2006-05-25
作者简介:庞洪喜 (1978-), 男, 安徽阜南人, 博士, 助理研究员,主要从事稳定同位素与气候变化研究。 E-mail: hx.pang@lzb.ac.cn
基金资助:
国家自然科学基金项目 (40501014; 90511007); 冰川冻土特殊学科人才培养项目 (J0130084)

Comparisons of Stable Isotopic Fractionation in Winter and Summer at Baishui Glacier No. 1, Mt. Yulong

PANG Hongxi¹, HE Yuanqing^1,2, LU Aigang¹, ZHAO Jingdong¹, NING Baoying¹, YUAN Lingling¹, SONG Bo¹, ZHANG Ningning¹

1. Key Laboratory of Cryosphere and Environment, Cold and Arid Regions Environmental and Engineering Research Institute, CAS, Lanzhou 730000, China;
2. Institute of Tibetan Plateau Research, CAS, Beijing 100029, China

Received:2005-11-30 Revised:2006-03-07 Online:2006-05-25 Published:2006-05-25
Supported by:
National Natural Science Foundation of China, No.40501014; No.90511007; Talent Culture Project for Special Subject of Glaciology and Geocryology, No.J0130084

摘要/Abstract

摘要：

利用玉龙雪山白水1号冰川区冬季和夏季表面积雪、雪坑、融水以及白水河河水中δ¹⁸O资料,对比分析了冬季和夏季我国典型季风温冰川系统内稳定同位素分馏行为的差异。分析结果表明,夏季冰川系统内各水体相变过程中稳定同位素分馏程度均比冬季强烈,指示出夏季季风海洋型冰川强烈消融的特点。另外,不论是冬季还是夏季,从表面积雪到融水再到由融水补给的河流,δ¹⁸O垂直变化梯度依次增大,反映了从固态降雪向冰川融水补给的河流河水转换过程中,稳定同位素分馏程度逐渐增强,体现了沉积后过程对海洋型冰川区同位素记录的影响具有空间差异性。

关键词: 云南, 玉龙雪山, 季风海洋型冰川, δ¹⁸O

Abstract:

Based on the data of δ¹⁸O in surface snow, snow pits, meltwater and the glacier-fed river water at Baishui glacier No. 1, Mt. Yulong, the isotopic fractionation behaviors in the typical monsoonal temperate glacier system in winter and summer were compared. The results indicate that the isotopic fractionation degree in summer is larger than that in winter, suggesting that the snow/ice melting is more intense in summer. Moreover, whenever it is in winter or summer, from surface snow to meltwater, and to glacier-fed river water, the gradient of δ¹⁸O with altitude gradually increases. It shows that the degree of isotopic fractionation gradually strengthens when surface snow being converted into meltwater and finally into glacial river water, which suggests that the influence of post-depositional processes on δ¹⁸O gradient in the monsoonal temperate glacier region differs spatially.

Key words: Yunnan, Yulong Mountain, monsoonal temperate-glacier, δ¹⁸O

庞洪喜, 何元庆, 卢爱刚, 赵井东, 宁宝英, 院玲玲, 宋波, 张宁宁. 玉龙雪山冰川稳定同位素分馏冬夏对比[J]. 地理学报, 2006, 61(5): 501-509.

PANG Hongxi, HE Yuanqing, LU Aigang, ZHAO Jingdong, NING Baoying, YUAN Lingling, SONG Bo, ZHANG Ningning. Comparisons of Stable Isotopic Fractionation in Winter and Summer at Baishui Glacier No. 1, Mt. Yulong[J]. Acta Geographica Sinica, 2006, 61(5): 501-509.

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玉龙雪山冰川稳定同位素分馏冬夏对比

Comparisons of Stable Isotopic Fractionation in Winter and Summer at Baishui Glacier No. 1, Mt. Yulong

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