| 祁连山区雪冰反照率变化及其对冰川物质平衡的影响 |
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| 引用本文： | 张太刚,高坛光,刁文钦,张玉兰. 祁连山区雪冰反照率变化及其对冰川物质平衡的影响[J]. 冰川冻土, 2021, 43(1): 145-157. DOI: 10.7522/j.issn.1000-0240.2021.0038 |
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| 作者姓名： | 张太刚 高坛光 刁文钦 张玉兰 |
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| 作者单位： | 1.兰州大学 资源环境学院 西部环境教育部重点实验室，甘肃 兰州 730000;2.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;3.中国科学院 青藏高原地球科学卓越创新中心，北京 100101 |
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| 基金项目： | 第二次青藏高原综合科学考察研究项目(2019QZKK0605);国家自然科学基金项目(41671067);中国科学院“西部之光”人才培养计划项目（张玉兰）;冰冻圈科学国家重点实验室自主课题(SKLCS-ZZ-2020) |
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| 摘 要： | 雪冰反照率能够改变冰川表面能量收支平衡，是影响冰川消融的重要因素之一。利用祁连山地区冰川面积矢量数据、MODIS逐日积雪反照率、气温和降水以及冰川物质平衡等数据，探讨了祁连山典型冰川区雪冰反照率特征及其对冰川物质平衡的影响。结果表明：祁连山地区冰川多年平均反照率为0.532，冰川区面积大小与其多年平均反照率之间呈显著正相关（R2=0.16，P<0.05，N=91），即冰川面积缩减1 km2，对应的平均反照率下降0.0025。祁连山老虎沟12号冰川反照率在夏季有明显的海拔效应，且强于其他时段，达到0.047?（100m）-1。典型冰川年均物质平衡量与冰川表面夏季（6—8月）平均反照率之间存在显著的正相关关系，老虎沟12号冰川和七一冰川决定系数R2分别达到了0.48（P<0.05）和0.66（P <0.05）。冰川表面夏季平均反照率这一指标能够较好地衡量青藏高原北部祁连山地区冰川物质平衡的变化。
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| 关 键 词： | 雪冰反照率 冰川变化 冰川物质平衡 祁连山 |
| 收稿时间： | 2019-12-14 |
| 修稿时间： | 2020-08-28 |
Snow/ice albedo variation and its impact on glacier mass balance in the Qilian Mountains |
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| ZHANG Taigang,GAO Tanguang,DIAO Wenqin,ZHANG Yulan. Snow/ice albedo variation and its impact on glacier mass balance in the Qilian Mountains[J]. Journal of Glaciology and Geocryology, 2021, 43(1): 145-157. DOI: 10.7522/j.issn.1000-0240.2021.0038 |
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| Authors: | ZHANG Taigang GAO Tanguang DIAO Wenqin ZHANG Yulan |
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| Affiliation: | 1.Key Laboratory of Western China’s Environmental Systems （Ministry of Education），College of Earth and Environmental Sciences，Lanzhou University，Lanzhou 730000，China;2.State Key Laboratory of Cryospheric Science，Northwest Institute of Eco-Environment and Resources，Chinese Academy of Sciences，Lanzhou 730000，China;3.CAS Center for Excellence in Tibetan Plateau Earth Sciences，Beijing 100101，China |
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| Abstract: | Snow/ice albedo can affect the glacier surface energy budget， making it an important factor to impact glacier melt. Based on vector data of glacierized areas， MODIS daily snow albedo， air temperature and precipitation， and glacier mass balance in the Qilian Mountains， this study addressed the spatial-temporal characteristics of snow/ice albedo， and the relationship between glacier mass balance and snow/ice albedos. The results indicated an average albedo in the study area was 0.532. A positive correlation existed between glacierized area and annual averaged albedo， namely the glacierized area decreased by 1 km2 will cause a reduction of albedo by 0.0025. For the typical glaciers of Laohugou Glacier No.12 and Qiyi Glacier， average albedo during summer （June to August） was significantly positive correlated with annual glacier mass balance， coefficient of determination reaching 0.48 （P<0.05） and 0.66 （P<0.05）， respectively. Such result indicated that variation of albedo played a great impact on smaller glaciers， which will further enhance the retreat of smaller glaciers. The average albedo during summer can be considered as an effective proxy for changes of glacier mass balance. |
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| Keywords: | snow/ice albedo glacier change glacier mass balance Qilian Mountains |
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