| 1990-2020年间念青唐古拉山中段北坡边坝地区冰川变化及气候响应 |
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| 引用本文： | 张威,李亚鹏,柴乐,唐倩玉,葛润泽,麻浩男.1990-2020年间念青唐古拉山中段北坡边坝地区冰川变化及气候响应[J].地理科学进展,2021,40(12):2073-2085. |
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| 作者姓名： | 张威 李亚鹏 柴乐 唐倩玉 葛润泽 麻浩男 |
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| 作者单位： | 辽宁师范大学地理科学学院,辽宁大连116029;东华理工大学地球科学学院,南昌330127 |
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| 基金项目： | 国家自然科学基金项目(42071013);国家自然科学基金项目(41671005) |
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| 摘 要： | 念青唐古拉山作为青藏高原东南缘重要山古冰川分布区,受季风影响,各区域冰川变化特征差异明显。论文通过Landsat TM/ETM+/OLI资料、ASRTMGDEM与气象数据,采用比值—阈值法、目视解译和VOLTA模型,结合实地考察,对1990—2020年间念青唐古拉山中段北坡边坝地区现代冰川进退状况、面积变化、冰储量变化以及冰川变化对气候变化响应特征进行研究。结果表明：① 1990—2020年5条冰川(玉贡拉冰川、玛拉波冰川、祥格拉冰川、孔嘎冰川、贡日—庚东冰川)末端高程逐渐升高,面积和冰储量分别减少30.38 km2和4.64 km3,总体缩减并呈现加速趋势。② 冰川冰储量减少0.14~1.92 km3,总体变化率为0.40%·a-1。2020年上述5条冰川储量占1990年冰川储量的比例分别为0.70、0.99、0.98、0.91和0.82,显示出冰川规模越大,在短时间尺度的变化量越小。③ 气象数据分析显示,1990—2020年研究区冰川变化受气温升高主导,平均气温变化率为0.51 ℃。水热组合呈现温度升高—降水减少,且在最后10 a日益显著,预测未来冰川变化仍受气温控制并呈加速退缩趋势。④ 区域对比研究表明,念青唐古拉山冰川面积变化总体呈退缩状态,但各区域冰川变化特征差异明显。同时,不同研究方法对同一冰川区冰储量模拟结果相差较大,相对误差范围为34.45%~115.49%,精确的冰储量可对比研究方法仍有待进一步研究。
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| 关 键 词： | 遥感解译 冰川变化 VOLTA模型 气候响应 念青唐古拉山中段 |
| 收稿时间： | 2021-01-18 |
| 修稿时间： | 2021-06-30 |
Glacier change and response to climate in the northern slope of the middle Nyainqêntanglha Mountains during 1990-2020 |
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| ZHANG Wei,LI Yapeng,CHAI Le,TANG Qianyu,GE Runze,MA Haonan.Glacier change and response to climate in the northern slope of the middle Nyainqêntanglha Mountains during 1990-2020[J].Progress in Geography,2021,40(12):2073-2085. |
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| Authors: | ZHANG Wei LI Yapeng CHAI Le TANG Qianyu GE Runze MA Haonan |
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| Institution: | 1. School of Geography, Liaoning Normal University, Dalian 116029, Liaoning, China
2. School of Earth Sciences, East China University of Technology, Nanchang 330127, China |
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| Abstract: | Located on the southeast edge of the Qinghai-Tibet Plateau, the Nyainqêntanglha Mountains are an important area of mountain paleoglaciers. Affected by the monsoon, the glacier change characteristics in each region are obviously different. Based on Landsat TM/ETM+/OLI data, ASRTMGDEM and meteorological data, using the method of threshold ratio, visual interpretation, VOLTA model and combined with field investigations, this study analyzed the advance and retreat conditions, area changes, ice reserves changes, and glacier changes deal with climate change of modern glaciers in the middle Nyainqêntanglha Mountains from 1990 to 2020. The results show that: 1) During the period 1990-2020, the elevation of the five studied glaciers (G094383E30581N, G094574E30563, G094637E30633N, G094770E30626N and G094928E30607N) gradually increased. The glacier area and ice reserves decreased by 30.38 km2 and 64 km3 respectively. 2) The ice reserve of each glacier decreased by 0.14-1.92 km3, with an overall change rate of 0.40%·a-1. By 2020, the reserves of the above glaciers will account for 0.70, 0.99, 0.98, 0.91 and 0.82 in 1990 respectively, which shows that the larger the scale of the glacier, the smaller the change is in a short time. 3) Through the analysis of meteorological data, during 1990-2020, the average temperature change rate of the study area was 0.51 ℃, which shows that the overall glacier change was dominated by the temperature rise. It is predicted that the glacier change in the future will be controlled by the temperature and show a trend of accelerated retreat. 4) The regional comparative study showed that the glacier area change in the Nyainqêntanglha Mountains is generally in a state of retreat, but the characteristics of glacier change in different regions are obviously different. The research on glacier ice reserves in the region is relatively weak, and the simulation results of different research methods for the same glacier ice reserves have large errors, with the relative error range of 34.45%-115.49%. |
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| Keywords: | remote sensing image interpretation glacier change VOLTA model response to climate middle Nyainqêntanglha Mountains |
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