| 1980 - 2015年南迦巴瓦峰地区冰川变化及其对气候变化的响应 |
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| 引用本文： | 吴坤鹏,刘时银,郭万钦.1980 - 2015年南迦巴瓦峰地区冰川变化及其对气候变化的响应[J].冰川冻土,2020,42(4):1115-1125. |
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| 作者姓名： | 吴坤鹏 刘时银 郭万钦 |
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| 作者单位： | 1.云南大学 国际河流与生态安全研究院, 云南 昆明 650091;2.云南大学 国际河流与跨境生态安全重点实验室, 云南 昆明 650091;3.中国科学院 西北生态环境资源研究院 冰冻圈科学国家重点实验室, 甘肃 兰州 730000 |
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| 基金项目： | 国家自然科学基金项目(41801031);云南大学人才引进项目(YJRC3201702);中国科学院冰冻圈科学国家重点实验室开放基金项目(SKLCS-OP-2019-07) |
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| 摘 要： | 基于地形图和Landsat TM/OLI遥感影像等数据， 利用目视解译和波段比值法提取1980年、 2000年和2015年南迦巴瓦峰地区冰川空间分布数据， 分析研究区近35年冰川变化， 探讨冰川对气候变化的响应。结果表明： 1980 - 2015年， 南迦巴瓦峰地区冰川面积持续减小并呈加速退缩的趋势， 近35年共减少了（75.23±4.67） km2， 占1980年冰川总面积的（25.2±1.6）%， 年平均面积减小率为（0.73±0.05）%。研究区东南坡冰川面积变化速率大于西北坡， 在不同流域、 海拔及朝向上， 冰川变化差异较大。南迦巴瓦峰地区冰川表碛十分发育， 表碛覆盖冰川面积变化率小于裸露冰川， 表碛覆盖对冰川消融具有抑制作用。南迦巴瓦峰地区在气温显著升高的背景下， 虽然降水量有所增加， 但冰川对气温更加敏感， 因气温升高引起冰川消融所带来的物质损失超过降水增加对冰川的补给， 导致南迦巴瓦峰地区冰川普遍萎缩。
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| 关 键 词： | 南迦巴瓦峰 冰川变化 气候响应 表碛覆盖 |
| 收稿时间： | 2018-10-07 |
| 修稿时间： | 2019-11-10 |
Glacier variation and its response to climate change in the Mount Namjagbarwa from 1980 to 2015 |
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| Kunpeng WU,Shiyin LIU,Wanqin GUO.Glacier variation and its response to climate change in the Mount Namjagbarwa from 1980 to 2015[J].Journal of Glaciology and Geocryology,2020,42(4):1115-1125. |
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| Authors: | Kunpeng WU Shiyin LIU Wanqin GUO |
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| Institution: | 1.Institute of International Rivers and Eco-Security，Yunnan University，Kunming 650091，China;2.Yunnan Key Laboratory of International Rivers and Transboundary Eco-Security，Yunnan University，Kunming 650091，China;3.State Key Laboratory of Cryospheric Science，Northwest Institute of Eco-Environment and Resources，Chinese Academy of Sciences，Lanzhou 730000，China |
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| Abstract: | Based on topographic maps and Landsat TM/OLI remote sensing images and other data， visual interpretation and band ratio method were used to extract the spatial distribution data of glaciers in the Mount Namjagbarwa in 1980， 2000 and 2015， to analyze the glacier variation in the study area from 1980 to 2015， and to discuss the response of glaciers to climate change. The results show that from 1980 to 2015， the glacierized area in the Mount Namjagbarwa had continued to decrease and showed a trend of accelerated retreat. From 1980 to 2015 the total glacierized area had decreased by （75.23±4.67） km2， accounting for （25.2±1.6）% of the total glacierized area in 1980， with the annual mean decreasing rate of （0.73±0.05）%. The glacierized area changing rate on the southeast slopes of the study area was higher than that on the northwest slopes， with a glacierized area variation varying greatly in between different river basins， elevations and orientations. Debris was well developed in the Mount Namjagbarwa， and the change rate of debris covered glacierized area was less than that of non-debris covered glacierized area. Debris cover has an inhibitory effect on glacier ablation. Under the background of significantly rising temperature， although precipitation had increased also， the glacier was still more sensitive to the climate warming. The mass loss caused by the glacier ablation due to rising temperature exceeded the mass accumulation due to precipitation increase， leading to the general shrinking of the glaciers in the mount. |
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| Keywords: | Mount Namjagbarwa glacier variation climate response debris cover |
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