| 玉龙雪山冰川稳定同位素分馏冬夏对比 |
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| 引用本文： | 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. |
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| 作者姓名： | 庞洪喜 何元庆 卢爱刚 赵井东 宁宝英 院玲玲 宋波 张宁宁 |
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| 作者单位： | 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 |
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| 基金项目： | 中国科学院资助项目;冰川冻土特殊学科人才培养项目 |
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| 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。
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| 关 键 词： | 云南 玉龙雪山 季风海洋型冰川 δ18O |
| 收稿时间： | 2005-11-30 |
| 修稿时间： | 3/7/2006 12:00:00 AM |
Comparisons of Stable Isotopic Fractionation in Winter and Summer at Baishui Glacier No. 1, Mt. Yulong |
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| 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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| Authors: | PANG Hongxi HE Yuanqing LU Aigang ZHAO Jingdong NING Baoying YUAN Lingling SONG Bo ZHANG Ningning |
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| Institution: | 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 |
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| 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. |
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| Keywords: | Yunnan Yulong Mountain monsoonal temperate-glacier δ18O |
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