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Authors
Affiliations
1 Centre for Incubation, Innovation, Research and Consultancy, Jyothy Institute of Technology, Tataguni, Bengaluru 560 082, IN
2 School of Electronics Engineering, Vellore Institute of Technology, Chennai 600 127, IN
3 ESSO-National Centre for Polar and Ocean Research (Ministry of Earth Sciences, Government of India), Goa 403 804, IN
4 Space Applications Centre, Indian Space Research Organization, Ahmedabad 380 015, IN
Source
Current Science, Vol 119, No 12 (2020), Pagination: 1961-1973
Abstract
Several recent studies carried out in the Himalayan region suggest enhanced receding rate of glaciers during the last two decades. Glacier health can be assessed by monitoring various glacier dynamics that includes mass balance, accumulation area ratio (AAR), equilibrium line altitude (ELA), etc. Here AAR, ELA and regressed mass balance for nine glaciers of the Bhaga basin, Western Himalaya during 2008–18 are presented using high resolution Sentinel 2 (10 m) and Landsat 7/8 (30 m) data with improved AAR and degree day/temperature index (DD/TI) model. Transient snow line (TSL) and AAR derived from the model were used in different regression equations to estimate the mass balance in both glacier and basin scale. In situ precipitation and temperature data obtained from the automatic weather station located at Keylong, Himachal Pradesh were used in this model based approach. Overall, the data reveal that most of the glaciers have experienced critical thinning and lost huge ice mass in the range –6.07 m.w.e. to –9.06 m.w.e.
Keywords
Accumulation Area Ratio, Glaciers, Mass Balance, Snow Line, Temperature Index.
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