We examined the two neighbouring Raj Bank and Kosa glaciers of the upper Dhauliganga catchment of... more We examined the two neighbouring Raj Bank and Kosa glaciers of the upper Dhauliganga catchment of Uttarakhand, central Himalaya, India, to assess their variability towards climate change. We performed the analysis of multiple satellite images for the period of 1962-2019 and Beld-based GNSS data obtained during 2018-2019. Length change, area change, debris cover area, and snowline altitude (SLA) were obtained using that. During the last 57 years (1962-2019), the Raj Bank and Kosa glaciers lost 2.43% (0.32 km 2 or 0.006 km 2 a À1) and 4.54% (0.45 km 2 or 0.008 km 2 a À1) area; and for the same time span, their frontal retreat was estimated 639.39 m (11.22 m a À1) and 206.71 m (3.69 m a À1), respectively. The study also depicts that from 1968 to 2019, the Raj Bank glacier shows a significant increase in the debris cover area of 4.41%, while in the Kosa glacier, it was 4.08% only. Between 1968 and 2017, the SLA of the Raj Bank and Kosa glaciers shifted on an average by 82 and 71 m upwards, respectively. Loss in glacial area, enhanced debris cover area, and shift in SLA are the indicators of ice volume loss under the present climatic scenario.
Water, Cryosphere, and Climate Change in the Himalayas, 2021
Multispectral satellite imageries analyzed that the Himalayan region reflected the fast retreat o... more Multispectral satellite imageries analyzed that the Himalayan region reflected the fast retreat of most of the glaciers. This further showed that especially the moraine-dammed proglacial lakes are also increasing. Those lakes are a major threat to property and life to downstream locations. Numerous research carried out in the Himalayan region under the changing climate and glacier status has indicated an alarming rise in the number and sizes of the glacial lakes that may be potentially disastrous when converts into the glacial lake outburst flood (GLOF). This study focusses on the glacial lakes mapping at the different time frame in the basins of Chenab, Ravi, Satluj and Beas of Himachal Himalaya using LISS III. The remotely sensed imageries on the GIS platform helped in preparing the moraine dammed glacial lake inventory and assessing the potentiality of becoming the GLOF in these basins. This is of prime importance for preparedness against disasters due to GLOFs. This requires a c...
We examined the two neighbouring Raj Bank and Kosa glaciers of the upper Dhauliganga catchment of... more We examined the two neighbouring Raj Bank and Kosa glaciers of the upper Dhauliganga catchment of Uttarakhand, central Himalaya, India, to assess their variability towards climate change. We performed the analysis of multiple satellite images for the period of 1962-2019 and Beld-based GNSS data obtained during 2018-2019. Length change, area change, debris cover area, and snowline altitude (SLA) were obtained using that. During the last 57 years (1962-2019), the Raj Bank and Kosa glaciers lost 2.43% (0.32 km 2 or 0.006 km 2 a À1) and 4.54% (0.45 km 2 or 0.008 km 2 a À1) area; and for the same time span, their frontal retreat was estimated 639.39 m (11.22 m a À1) and 206.71 m (3.69 m a À1), respectively. The study also depicts that from 1968 to 2019, the Raj Bank glacier shows a significant increase in the debris cover area of 4.41%, while in the Kosa glacier, it was 4.08% only. Between 1968 and 2017, the SLA of the Raj Bank and Kosa glaciers shifted on an average by 82 and 71 m upwards, respectively. Loss in glacial area, enhanced debris cover area, and shift in SLA are the indicators of ice volume loss under the present climatic scenario.
Water, Cryosphere, and Climate Change in the Himalayas, 2021
Multispectral satellite imageries analyzed that the Himalayan region reflected the fast retreat o... more Multispectral satellite imageries analyzed that the Himalayan region reflected the fast retreat of most of the glaciers. This further showed that especially the moraine-dammed proglacial lakes are also increasing. Those lakes are a major threat to property and life to downstream locations. Numerous research carried out in the Himalayan region under the changing climate and glacier status has indicated an alarming rise in the number and sizes of the glacial lakes that may be potentially disastrous when converts into the glacial lake outburst flood (GLOF). This study focusses on the glacial lakes mapping at the different time frame in the basins of Chenab, Ravi, Satluj and Beas of Himachal Himalaya using LISS III. The remotely sensed imageries on the GIS platform helped in preparing the moraine dammed glacial lake inventory and assessing the potentiality of becoming the GLOF in these basins. This is of prime importance for preparedness against disasters due to GLOFs. This requires a c...
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