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Ganjoo, R. K.
- Are the Himalayan Glaciers Retreating?
Abstract Views :203 |
PDF Views:94
Authors
I. M. Bahuguna
1,
B. P. Rathore
1,
Rupal Brahmbhatt
2,
Milap Sharma
3,
Sunil Dhar
4,
S. S. Randhawa
5,
Kireet Kumar
6,
Shakil Romshoo
7,
R. D. Shah
2,
R. K. Ganjoo
8,
Ajai
1
Affiliations
1 Space Applications Centre, Ahmedabad 380 015, IN
2 M. G. Science Institute, Ahmedabad 380 009, IN
3 School of Social Sciences, Jawaharlal Nehru University, Delhi 110 067, IN
4 Department of Geology, Government College, Dharamshala 176 215,, IN
5 State Council of Science and Technology, Shimla 171 009, IN
6 G.B. Pant Institute of Himalayan Environment and Development, Almorah 263 643, IN
7 Department of Earth Sciences, University of Kashmir, Srinagar 190 006, IN
8 Department of Geology, Jammu University, Jammu 180 006, IN
1 Space Applications Centre, Ahmedabad 380 015, IN
2 M. G. Science Institute, Ahmedabad 380 009, IN
3 School of Social Sciences, Jawaharlal Nehru University, Delhi 110 067, IN
4 Department of Geology, Government College, Dharamshala 176 215,, IN
5 State Council of Science and Technology, Shimla 171 009, IN
6 G.B. Pant Institute of Himalayan Environment and Development, Almorah 263 643, IN
7 Department of Earth Sciences, University of Kashmir, Srinagar 190 006, IN
8 Department of Geology, Jammu University, Jammu 180 006, IN
Source
Current Science, Vol 106, No 7 (2014), Pagination: 1008-1013Abstract
The Himalayan mountain system to the north of the Indian land mass with arcuate strike of NW-SE for about 2400 km holds one of the largest concentration of glaciers outside the polar regions in its high-altitude regions. Perennial snow and ice-melt from these frozen reservoirs is used in catchments and alluvial plains of the three major Himalayan river systems, i.e. the Indus, Ganga and Brahmaputra for irrigation, hydropower generation, production of bio-resources and fulfilling the domestic water demand. Also, variations in the extent of these glaciers are understood to be a sensitive indicator of climatic variations of the earth system and might have implications on the availability of water resources in the river systems. Therefore, mapping and monitoring of these freshwater resources is required for the planning of water resources and understanding the impact of climatic variations. Thus a study has been carried out to find the change in the extent of Himalayan glaciers during the last decade using IRS LISS III images of 2000/01/02 and 2010/11. Two thousand and eighteen glaciers representing climatically diverse terrains in the Himalaya were mapped and monitored. It includes glaciers of Karakoram, Himachal, Zanskar, Uttarakhand, Nepal and Sikkim regions. Among these, 1752 glaciers (86.8%) were observed having stable fronts (no change in the snout position and area of ablation zone), 248 (12.3%) exhibited retreat and 18 (0.9%) of them exhibited advancement of snout. The net loss in 10,250.68 sq. km area of the 2018 glaciers put together was found to be 20.94 sq. km or 0.2% (±2.5% of 20.94 sq. km).Keywords
Ablation, Glacier, Himalaya, Retreat, Snout.- Glacier-Fed Himalayan rivers of India
Abstract Views :271 |
PDF Views:92
Authors
Affiliations
1 Department of Geology, University of Jammu, Jammu 180 006, IN
1 Department of Geology, University of Jammu, Jammu 180 006, IN
Source
Current Science, Vol 121, No 2 (2021), Pagination: 210-213Abstract
Whether scarcity of water is due to climate change or population explosion is a matter of debate among scientists. The demand for water resources will increase in the future. The depletion of resources in the Himalaya – the Third Pole, will have a serious effect on the major rivers of Asia that are fed from the Tibetan Plateau and the Himalaya. Scientific studies on the Himalaya and Tibetan Plateau glaciers indicate that topography and local conditions favour the long sustenance of glaciers. In large parts of the Himalaya and Tibetan Plateau, the rise in atmospheric temperature does not cause any serious impact on the glaciers, particularly in Karakorum Himalaya. The water supply from Upper Indus, Ganges and Brahmaputra rivers is likely to decrease by –8.4%, –17.6% and –19.6% respectively, and there is likelihood of an increase in mean upstream rainfall in the Indus (+25%), Ganges (+8%) and Brahmaputra (+25%), implying that the Himalayan rivers will continue to flow, with no substantial decrease in water budget and no fear of rivers to dry.Keywords
Climate Change, Glacier-Fed Rivers, Snow, Water Scarcity.References
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