Journal of Glaciology (2016), 62(236) 1115–1133 doi: 10.1017/jog.2016.96 © The Author(s) 2016. This is an Open Access article, distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives licence (http://creativecommons.org/licenses/by-nc-nd/4.0/), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original work is unaltered and is properly cited. The written permission of Cambridge University Press must be obtained for commercial re-use or in order to create a derivative work. Overall recession and mass budget of Gangotri Glacier, Garhwal Himalayas, from 1965 to 2015 using remote sensing data ATANU BHATTACHARYA,1* TOBIAS BOLCH,1,2* KRITI MUKHERJEE,1 ̌ TINO PIECZONKA,1 JAN KROPÁCEK,3 MANFRED F. BUCHROITHNER1 1Institut für Kartography, Technische Universität Dresden, Dresden, Germany 2Department of Geography, University of Zürich – Irchel, Zürich, Switzerland 3Department of Geosciences, University of Tübingen, Tübingen, Germany *Correspondence: Atanu Bhattacharya; Tobias Bolch <
[email protected];
[email protected]> ABSTRACT. Thinning rates for the debris-covered Gangotri Glacier and its tributary glaciers during the period 1968–2014, length variation and area vacated at the snout from 1965 to 2015, and seasonal vari- ation of ice-surface velocity for the last two decades have been investigated in this study. It was found that the mass loss of Gangotri and its tributary glaciers was slightly less than those reported for other debris-covered glaciers in the Himalayan regions. The average velocity during 2006–14 decreased by ∼6.7% as compared with that during 1993–2006. The debris-covered area of the main trunk of Gangotri Glacier increased significantly from 1965 until 2015 with the maximum rate of increase − − (0.8 ± 0.2 km2 a 1) during 2006–15.