| 1973—2020年阿尔金山冰川面积变化及其对气温变化的响应 |
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| 引用本文： | 田洪阵,肖月,杨太保,刘沁萍,张开帆. 1973—2020年阿尔金山冰川面积变化及其对气温变化的响应[J]. 冰川冻土, 2021, 43(5): 1424-1434. DOI: 10.7522/j.issn.1000-0240.2021.0093 |
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| 作者姓名： | 田洪阵 肖月 杨太保 刘沁萍 张开帆 |
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| 作者单位： | 1.天津工业大学 经济与管理学院，天津 300387;2.天津工业大学 环境科学与工程学院，天津 300387;3.兰州大学 资源环境学院 冰川与生态地理研究所，甘肃 兰州 730000;4.兰州大学 资源环境学院，甘肃 兰州 730000 |
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| 基金项目： | 国家自然科学基金项目(40871057);天津市哲学社会科学研究规划项目(TJGL20-012) |
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| 摘 要： | 研究冰川面积变化对气温变化的响应模式，对于冰川资源的保护和利用具有重要意义。利用Landsat MSS、TM和OLI影像，采用比值阈值法结合目视修正，提取了阿尔金山地区1973—2020年8个时期的冰川边界信息，分析了冰川的时空变化特征，并结合距离阿尔金山较近的且末、若羌、茫崖和冷湖等四个气象站点的气象数据，分析了冰川变化对气温变化的响应规律。主要结论如下：1973—2020年阿尔金山地区冰川整体处于退缩状态，面积减少了（64.89±12.36） km2（19.21%±2.90%）；1973—1990年冰川退缩较快，年均退缩率为（0.49±0.07）%·a-1；1990—1995年和1995—2000年这两个时期冰川退缩最快，年均退缩率分别为（1.07±0.08）%·a-1和（1.08±0.08）%·a-1；2000年后，冰川退缩速率较慢，比较稳定，年均退缩率均低于0.2%·a-1。气温是影响阿尔金山地区1973—2020年冰川变化的主要气候因子。阿尔金山地区冰川对不同气温变化阶段的响应模式为：气温升高阶段，冰川消融，冰川面积减少；气温稳定阶段，冰川逐渐进入新的动态均衡状态，冰川面积也相对稳定；气温降低阶段，因冰川运动的滞后性，冰川面积在短时间内无明显变化。
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| 关 键 词： | 阿尔金山 冰川面积变化 气温变化 响应 遥感 |
| 收稿时间： | 2021-07-08 |
| 修稿时间： | 2021-10-08 |
Glacier area changes and their responses to air temperature changes in the Altun Mountains from 1973 to 2020 |
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| TIAN Hongzhen,XIAO Yue,YANG Taibao,LIU Qinping,ZHANG Kaifan. Glacier area changes and their responses to air temperature changes in the Altun Mountains from 1973 to 2020[J]. Journal of Glaciology and Geocryology, 2021, 43(5): 1424-1434. DOI: 10.7522/j.issn.1000-0240.2021.0093 |
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| Authors: | TIAN Hongzhen XIAO Yue YANG Taibao LIU Qinping ZHANG Kaifan |
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| Affiliation: | 1.School of Economics and Management，Tiangong University，Tianjin 300387，China;2.School of Environmental Science and Engineering，Tiangong University，Tianjin 300387，China;3.Institute of Glaciology and Ecogeography，College of Earth and Environmental Sciences，Lanzhou University，Lanzhou 730000，China;4.College of Earth and Environmental Sciences，Lanzhou University，Lanzhou 730000，China |
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| Abstract: | Studying the response mode of glacier area changes to temperature changes is of great significance to the protection and utilization of glacier resources. Glacier outlines of eight periods from 1973 to 2020 in the Altun Mountains were delineated in a semi-automated manner using band ratio images of Landsat MSS， TM and OLI scenes. The spatial-temporal characteristics of glacier changes were analyzed. The meteorological data from four meteorological stations， namely， Qiemo， Ruoqiang， Mangya and Lenghu， around the study area were utilized to investigate the responses of glacier to air temperature changes. We found that in general， the glaciers were shrinking in the Altun Mountains from 1973 to 2020 and the glacier area decreased （64.89±12.36） km2（19.21%±2.90%）. The glaciers retreated faster from 1973 to 1990 with an annual shrinking rate of （0.49±0.07）%·a-1 and the fastest in two periods of 1990—1995 and 1995—2000 than other time periods with annual shrinking rates of （1.07±0.08）%·a-1 and （1.08±0.08）%·a-1， respectively. After 2000， the glaciers shrank slowly and were relatively stable， with an annual shrinking rate under 0.2%·a-1. Air temperature was the main climatic factor affecting glacier changes in the Altun Mountains from 1973 to 2020. The response mode of the glaciers in the Altun Mountains to air temperature changes was： during the air temperature rising stage， the glaciers were melting， and the area of glaciers was decreasing； during the air temperature stable stage， the glaciers gradually reached a new dynamic equilibrium state， and the area of glaciers was relatively stable； during the air temperature decreasing stage， due to hysteresis of glacier movement， the area of glaciers would not change significantly in a short period of time. |
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| Keywords: | Altun Mountains glacier area change air temperature change response remote sensing |
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