Study of 40-year glacier retreat in the northern region of the Cordillera Vilcanota, Peru, using satellite images: preliminary results
Study of 40-year glacier retreat in the northern region of the Cordillera Vilcanota, Peru, using satellite images: preliminary results
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利用卫星图像对秘鲁维尔卡诺塔山脉北部地区 40 年冰川退缩进行的研究：初步结果
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
S. Souza
中科院分区：
文献类型：
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作者：
Bijeesh KV;S. Souza
摘要本文探讨了利用Landsat影像序列计算秘鲁东部科迪勒拉山地冰川面积年代际变化的可能性。在试验点，通过计算不同高程冰川面积变化，了解1975-2015年冰川退缩的高度梯度和方向性特征。这种方法可用于整个热带安第斯山脉，特别是在外热带地区，这取决于旱季无云图像的可用性。与热带安第斯山脉的其他地区类似，海拔5000米以下的冰川已经失去了近81%的初始面积。据观察，朝向东北和东部的冰川退缩幅度较大，这可能影响到亚马逊流域的冰川供水河流。未来的研究将估算整个东部科迪勒拉冰川的变化，以及相应的亚马逊流域水量的变化。
ABSTRACTIn this article, the possibility of using a Landsat image series to calculate the decadal changes in the area of mountain glaciers in the eastern cordillera of Peru is explored. In the pilot study site, changes in the glacier area at different elevation ranges to understand the altitudinal gradients and the directional properties of glacier retreat during the period 1975–2015 were calculated. This approach can be used in the entire tropical Andes, particularly in the outer tropics, depending on the availability of cloud-free images during the dry season. Similar to other regions in the tropical Andes, glaciers situated below 5000 m a.s.l. have lost nearly 81% of the initial area. It is observed that those glaciers directed towards north-east and east shows higher retreat and this may influence the glacier-fed rivers in the Amazon Basin. Future research will estimate the glacier variations in the entire eastern cordilleras and the corresponding changes in the water discharge volume in the Amazon Basin.