Reconstruction of specific mass balance for glaciers in Western Himalaya using seasonal sensitivity characteristic(s) |
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| Authors: | Vinay Kumar Gaddam Anil V Kulkarni Anil Kumar Gupta |
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| Institution: | 1.Cryosphere Science Division,National Center for Antarctica and Ocean Research,Goa,India;2.Divecha Center for Climate Change, CAOS,Indian Institute of Science,Bangalore,India;3.Department of Civil Engineering, Dr. Ambedkar Institute of Technology,Visvesvaraya Technological University-RC,Bangalore,India |
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| Abstract: | Seasonal sensitivity characteristics (SSCs) were developed for Naradu, Shaune Garang, Gor Garang and Gara glaciers, Western Himalaya to quantify the changes in mean specific mass balance using monthly temperature and precipitation perturbations. The temperature sensitivities were observed high during summer (April–October) and precipitation sensitivities during winter months (November–March), respectively. The reconstructed mass balance correlates well with the field and remote sensing measurements, available between 1980 and 2014. Further, SSCs were used with the monthly mean temperatures and precipitation estimates of ERA 20CM ensemble climate reanalysis datasets to reconstruct the specific mass balance for a period of 110 years, between 1900 and 2010. Mass balance estimates suggest that the Shaune Garang, Gor-Garang and Gara glaciers have experienced both positive and negative mass balance, whereas the Naradu glacier has experienced only negative mass balance since 1900 AD. Further, a cumulative loss of \(-133 \pm 21.5\) m.w.e was estimated for four glaciers during the observation period. This study is the first record from Indian Himalaya in evaluating the mass balance characteristics over a century scale. |
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