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Geospatially analysing the dynamics of the Khurdopin Glacier surge using multispectral and temporal remote sensing and ground observations
Natural Hazards ( IF 3.7 ) Pub Date : 2021-03-25 , DOI: 10.1007/s11069-021-04708-7
Muhammad Imran , Umair Ahmad

Karakorum glaciers are well known for the advancement and the formation of new glacial lakes due to accelerated climate warming. Its Shimshal valley is profoundly affected by glacier surges in the last couple of decades. Khurdopin glacier is one of the highly surging glaciers in the Karakorum region. Its continuous surge since the nineteenth century is blocking the Shimshal River and creating new lakes. Our objective is to investigate the Khurdopin glacier surge from 1999 to 2017. With this, we aim to identify possible climate and topographic controls on the glacier surge behaviour. We used Landsat 4–5, 7 and 8 satellite bands and ground observations to estimate the glacier retreat and new land cover types from the glacier surge. Our results show that the Khurdopin glacier surges every 20 years. We observed the first surge of 0.69 Km\(^2\) in 2000 and the second surge of 0.63 Km\(^2\) in 2017. Both events blocked the Shimshal River. We observed an increase of 1–4 °C in the glacier minimum and maximum winter temperatures. Moreover, we observed snowfall variations in the accumulation zone in the steep glacier slope with a north slope-aspect. The 64% of the glacier aspect is north that causes an increase in ice mass in the accumulation zone by receiving more snowfall in the winter season. The study output, combined with earlier findings, can further predict a surge event in the future.



中文翻译:

使用多光谱和时间遥感以及地面观测对库尔多平冰川潮动进行地理空间分析

喀喇昆仑冰川因气候变暖加快而形成的新冰川湖而闻名。在过去的几十年中,其Shimshal山谷受到冰川激增的深刻影响。Khurdopin冰川是喀喇昆仑地区风起云涌的冰川之一。自19世纪以来,它的持续增长阻塞了Shimshal河并创造了新的湖泊。我们的目标是调查1999年至2017年Khurdopin冰川潮汐。以此,我们旨在确定可能的气候和地形控制措施对冰川潮汐的影响。我们使用Landsat 4-5、7和8卫星频段和地面观测来估计冰川的退缩和来自冰川涌动的新的土地覆盖类型。我们的结果表明,库尔多平冰川每20年激增一次。我们观察到第一次浪涌为0.69公里\(^ 2 \)在2000年和0.63公里的第二次激增\(^ 2 \)在2017年。这两个事件均阻塞了Shimshal河。我们观察到冰川的最低和最高冬季温度升高了1-4°C。此外,我们观察到在陡峭的冰川斜坡上积雪带北坡的降雪变化。冰川面积的64%位于北部,冬季时降雪量增加,导致积聚区的冰块增加。研究结果与早期发现相结合,可以进一步预测未来的电涌事件。

更新日期:2021-03-25
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