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首页> 外文期刊>Earth System Science Data >Glacier changes in the Chhombo Chhu Watershed of the Tista basin between 1975 and 2018, the Sikkim Himalaya, India
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Glacier changes in the Chhombo Chhu Watershed of the Tista basin between 1975 and 2018, the Sikkim Himalaya, India

机译：1975年至2018年间Tista盆地的Chhombo Chhu流域的冰川变化，印度锡金喜马拉雅省

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Glaciers of the Tista basin represent an important water source for mountain communities and a large population downstream. The article presents observable changes in the Chhombo Chhu Watershed (CCW) glacier area of the Tista basin, the Sikkim Himalaya. The CCW contains 74 glaciers ( ?0.02?km 2 ) with a mean glacier size of 0.61?km 2 . We determined changes in glaciers from the declassified Hexagon Keyhole-9 (KH-9) (1975), Landsat?5 Thematic Mapper (TM) (1989), Landsat?7 Enhanced Thematic Mapper Plus (ETM + ) (2000), Landsat?5 TM (2010), and Sentinel-2A (2018) images. The total glacier area in 1975 was 62.6? ± ?0.7?km 2 ; and by 2018, the area had decreased to 44.8? ± ?1.5?km 2 , an area loss of 17.9? ± ?1.7?km 2 (0.42? ± ?0.04?km 2 ?a ?1 ). Clean glaciers exhibited more area loss of 11.8? ± ?1.2?km 2 (0.27? ± ?0.03?km 2 ?a ?1 ) than partially debris-covered and maximally debris-covered glaciers. The area loss is 5.0? ± ?0.4?km 2 (0.12? ± ?0.01?km 2 ?a ?1 ) for partially covered glaciers and 1.0? ± ?0.1?km 2 ( ?0.02 ? ± ?0.002?km 2 ?a ?1 ) for maximally covered glaciers. The glacier area loss in the CCW of the Sikkim Himalaya is 0.62? ± ?0.5?km 2 ?a ?1 during 2000–2010, and it is 0.77? ± ?0.6?km 2 ?a ?1 during 2010–2018. Field investigations of selected glaciers and climatic records also support the glacier recession in the CCW due to a significant increase in temperature (0.25? ° C?a ?1 ) and more or less static precipitation since 1995. The dataset is now available from the Zenodo web portal: https://doi.org/10.5281/zenodo.4457183 (Chowdhury et al., 2021).
机译：TISTA盆地的冰川代表了山区社区的重要水源和下游的大量人口。本文介绍了锡克基姆喜马拉雅省Tista盆地的Chhombo Chhu流域（CCW）冰川地区的可观察变化。 CCW含有74个冰川（＆Δ02Ωmp2），平均冰川尺寸为0.61 km 2。我们确定了来自Decrassified Hexagon Keyhole-9（KH-9）（1975）的冰川的变化，Landsat？5主题映射器（TM）（1989），Landsat？7增强专题Mapper加（ETM +）（2000），Landsat？ 5 TM（2010）和Sentinel-2a（2018）图像。 1975年的冰川总面积为62.6？ ±0.7 km 2;到2018年，该地区已减少至44.8？ ±1.5？Km 2，区域损失为17.9？ ±？1.7 km 2（0.42？±0.04？Km 2？a？1）。干净的冰川展出了11.8的更多区域损失？ ±1.2 km 2（0.27？±0.03Ω·基姆2？a？1），而不是部分碎片覆盖和最大碎片覆盖的冰川。区域损失是5.0？ ±0.4 km 2（0.12？±0.01±0.1m 2？a？1）用于部分覆盖的冰川和1.0？对于最大覆盖的冰川，±0.1 km 2（？0.02？±0.002Ω·基姆2？a？1）。锡金喜马拉雅山CCW的冰川区损失为0.62？ ±0.5？Km 2？a？1在2000-2010期间，它为0.77？ ±0.6？Km 2？a？1在2010-2018期间。所选择的冰川和气候记录的现场调查也支持CCW中的冰川衰退，由于温度显着增加（0.25Ω·℃？a？1），或者自1995年以来的更多或更少的静电降水量。数据集现在可从Zenodo获得网站门户：https://doi.org/10.5281/zenodo.4457183（Chowdhury等，2021）。

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