https://doi.org/10.5194/tc-2019-286 Preprint. Discussion started: 9 March 2020 c Author(s) 2020. CC BY 4.0 License. The surface energy balance in a cold-arid permafrost environment, Ladakh Himalaya, India John Mohd Wani1, Renoj J. Thayyen2*, Chandra Shekhar Prasad Ojha1, and Stephan Gruber3 1Department of Civil Engineering, Indian Institute of Technology (IIT) Roorkee, India, 2Water Resources System Division, National Institute of Hydrology, Roorkee, India (
[email protected];
[email protected]), 3Department of Geography & Environmental Studies, Carleton University, Ottawa, Canada Abstract: Cryosphere of the cold-arid trans-Himalayan region is unique with its significant permafrost cover. While the information on the permafrost characteristics and its extent started emerging, the governing energy regimes of this cryosphere region is of particular interest. This paper present the results of Surface Energy Balance (SEB) studies carried out in the upper 5 Ganglass catchment in the Ladakh region of India, which feed directly to the River Indus. The point SEB is estimated using the one-dimensional mode of GEOtop model from 1 September 2015 to 31 August 2017 at 4727 m a.s.l elevation. The model is evaluated using field monitored radiation components, snow depth variations and one-year near-surface ground temperatures and showed good agreement with the respective simulated values. The study site has an air 10 temperature range of – 23.7 to 18.1 °C with a mean annual average temperature (MAAT) of - 2.5 and ground surface temperature range of -9.8 to 19.1 °C. For the study period, the surface energy balance characteristics of the cold-arid site show that the net radiation was the major component with mean value of 28.9 W m-2, followed by sensible heat flux (13.5 W m-2) and latent heat flux (12.8 W m-2), and the ground heat flux was equal to 0.4 W m-2.