Sentinel‐2 images were used for mapping debris‐free glaciers for the first time in Cordillera Blanca. Landsat‐8 and Sentinel‐2 data were compared for glacier area estimation in 2016, obtaining comparable results. It was observed that normalized difference snow index method for glacier mapping using MSI data is less sensitive to cast shadows and steep terrain compared with Landsat data. Estimated total glacier areas in 1975, 1994, and 2016 were 726 ± 20.3 km², 576.9 ± 15.1 km² and 482.8 ± 7.4 km², respectively. Glacier area in 2016 using Landsat was slightly lower (475.7 ± 16.8 km²) compared to the area estimated using MSI data. Observed glacier shrinkage between 1975 and 2016 was 33.5 per cent, which is lower compared to observed glacier area loss in the eastern cordilleras of Peru. Glacier shrinkage was higher at northern and northeastern slopes (47.9 per cent and 48.1 per cent, respectively) compared to the south‐western slopes (11.1 per cent).

中文翻译：

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使用Sentinel-2和Landsat数据在秘鲁科迪勒拉·布兰卡，热带安第斯山脉进行冰川测绘

Sentinel-2图像首次在科迪勒拉·布兰卡山脉用于绘制无碎片冰川的地图。2016年对Landsat-8和Sentinel-2数据进行了冰川面积估算比较，获得了可比的结果。观察到，与Landsat数据相比，使用MSI数据进行冰川制图的归一化差异雪指数方法对投射阴影和陡峭地形的敏感性较低。在1975，1994，和2016年估计总冰川面积分别为726±20.3公里²，576.9±15.1公里²和482.8±7.4公里²分别。使用Landsat的2016年冰川面积略低（475.7±16.8 km ²）与使用MSI数据估算的面积进行比较。1975年至2016年之间观察到的冰川萎缩率为33.5％，与秘鲁东部山脉的冰川面积减少相比更低。与西南斜坡（11.1％）相比，北部斜坡和东北斜坡（分别为47.9％和48.1％）的冰川收缩较高。