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Bahuguna, Ishmohan
- Recent glacier area changes in Himalaya–Karakoram and the impact of latitudinal variation
Abstract Views :195 |
PDF Views:76
Authors
Ishmohan Bahuguna
1,
Bhanu Prakash Rathore
1,
Avtar Singh Jasrotia
2,
Surjeet Singh Randhawa
3,
Santosh Kumar Singh Yadav
4,
Sadiq Ali
2,
Nishtha Gautam
3,
Joyeeta Poddar
4,
Madhukar Srigyan
1,
Abhishek Dhanade
1,
Purvee Joshi
1,
Sushil Kumar Singh
1,
Dhani Ram Rajak
1,
Shashikant Sharma
1
Affiliations
1 Space Applications Centre, Indian Space Research Organization, Ahmedabad 380 015, India
2 Department of Remote Sensing, University of Jammu, Jammu 180 006, India
3 Himachal Pradesh Council for Science, Technology and Environment, Shimla 171 009, India
4 Remote Sensing Applications Centre-Uttar Pradesh, Lucknow 226 021, India
1 Space Applications Centre, Indian Space Research Organization, Ahmedabad 380 015, India
2 Department of Remote Sensing, University of Jammu, Jammu 180 006, India
3 Himachal Pradesh Council for Science, Technology and Environment, Shimla 171 009, India
4 Remote Sensing Applications Centre-Uttar Pradesh, Lucknow 226 021, India
Source
Current Science, Vol 121, No 7 (2021), Pagination: 929-940Abstract
We present the observed area changes in 5234 glaciers (out of which 3435 are debris-free) of Himalaya–Karakoram (H–K) region, mapped at a scale of 1 : 25,000 using primarily IRS LISS III data between the years 2001 and 2016/2017/2018. Area change is a direct observable parameter in the monitoring of glaciers. The mapping results have been analysed in different sectors of H–K region. In the Karakoram region, 2143 glacier bodies with an area coverage of 18343.39 km2 show a gain of 0.026%, whereas in Himalayan region, 3091 glaciers covering an area of 11451.53 km2 show a loss of 1.44% over a span of 17 years. Loss in glacier area in Himalayan region varies from 0.76% in sub-basins located in the left side of NW flowing Indus River (N–W Himalaya/J&K and Ladakh), 2.2% in Chenab and Sutlej basins (Western Himalaya/Himachal Pradesh), 0.84% in Ganga basin (West-Central Himalaya/Uttarakhand), 2.16% in Ganga basin (Central Himalaya/Nepal and a few glaciers of Tibetan region) and 2.15% in Tista sub-basin (Eastern Himalaya/Sikkim). The mapping uncertainty is less than 0.01%. The results also show that debris free glaciers are more vulnerable to global warming thereby affirming the earlier theories of differential impact of warming on debris free and debris covered glaciers. Overall, the statistics clearly indicate the effect of latitudinal variations on the gain/loss in the area of glaciers from higher to lower latitudes in addition to microclimatic and geomorphological factorsKeywords
Ablation, accumulation, glacier retreat, snout, latitudinal variationFull Text
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- Monitoring snow cover in the Himalayan–Karakoram basins using AWiFS data: significant outcomes
Abstract Views :148 |
PDF Views:80
Authors
Bhanu Prakash Rathore
1,
Ishmohan Bahuguna
1,
Sushil Kumar Singh
1,
Ujjwal Kumar Gupta
1,
Surjeet Singh Randhawa
2
Affiliations
1 Space Applications Centre, Indian Space Research Organisation, Ahmedabad 380 015, IN
2 Himachal Pradesh Council for Science, Technology and Environment, Vigyan Bhawan, Bemloe, Shimla 171 001, IN
1 Space Applications Centre, Indian Space Research Organisation, Ahmedabad 380 015, IN
2 Himachal Pradesh Council for Science, Technology and Environment, Vigyan Bhawan, Bemloe, Shimla 171 001, IN
Source
Current Science, Vol 122, No 11 (2022), Pagination: 1305-1314Abstract
Snow cover, the second largest component of the Earth’s cryosphere, controls the hydrology of basins, mass balance of glaciers and climate at the local, regional and global scale. Therefore, it is regularly observed through the Earth Observation (EO) dataset at fine, medium and coarse resolution to understand the impact of its variability in land–atmospheric interactions. The present study analyses of the variability of snow cover area within the Himalayan–Karakoram (H–K) region based on snow products generated by the NDSI approach using data from AWiFS sensor of Resourcesat satellites at an interval of five and ten days. The study covers 33 sub-basins of the Indus, Ganga and Brahmaputra basins in the H–K region. For analysis and presentation, results of the Indus basin have been further divided as Indus–North, Indus–South, Chenab and Satluj basins due to the large basin area. A high spatial and temporal variability in the seasonal snow area was observed in the entire H–K region based on the sub-basin-wise 35,910 snow cover products generated between 2004 and 2019. A higher percentage of snow area in the Karakoram region than in the other sub-basins was observed throughout the years. Though interannual trends of snow cover area remained more or less stable in all the basins, a decreasing trend was observed in October in a few basins and an increase in snow area in the Indus–North region during December and January.Full Text
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