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Wintertime surface energy balance of a high-altitude seasonal snow surface in Chhota Shigri glacier basin, Western Himalaya

By
Mohd Soheb
Mohd Soheb
School of Environmental Sciences, Jawaharlal Nehru University, New Delhi 110067, India
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Alagappan Ramanathan
Alagappan Ramanathan
School of Environmental Sciences, Jawaharlal Nehru University, New Delhi 110067, India
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Arindan Mandal
Arindan Mandal
School of Environmental Sciences, Jawaharlal Nehru University, New Delhi 110067, India
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Thupstan Angchuk
Thupstan Angchuk
School of Environmental Sciences, Jawaharlal Nehru University, New Delhi 110067, India
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Naveen Pandey
Naveen Pandey
School of Environmental Sciences, Jawaharlal Nehru University, New Delhi 110067, India
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Som Dutta Mishra
Som Dutta Mishra
School of Environmental Sciences, Jawaharlal Nehru University, New Delhi 110067, India
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Published:
January 01, 2018

Abstract

We describe a time series of meteorological parameters and surface energy balance components of a seasonal snow cover from an automatic weather station (4863 m a.s.l., 32.28° N, 77.58° E), for a winter season from 1 December 2012 to 30 March 2013, located on a moraine close to the equilibrium line altitude of Chhota Shigri glacier, Himachal Pradesh, India. The analysis shows that for over 80% of the time in winter, the snow surface was at a cooling phase. During late winter however, the surface had some positive residual energy which induced some melt during peak hours of the day. The net all-wave radiation was mostly negative during winter because of the high reflective property of snow and reduced incoming longwave radiation due to low cloud. The sensible heat flux heats the surface at night and enhances the cooling during day. The latent heat flux is always negative, showing that the surface is losing mass through sublimation processes (−0.83 mm w.e./day). A correlation between the energy fluxes and temperature shows a distinct relationship between fluxes. A comparison between the two studies performed on- and off-glacier reveals a significant difference in some parameters. A higher value (−1.08 mm/day) of sublimation rate at 4863 m a.s.l. shows that a large amount of energy available at the surface was used in sublimation processes. A comparatively lower albedo, relative humidity and net longwave radiation and higher latent heat flux, wind speed and net shortwave radiation yield a distinctive surface energy balance, highlighting the need for a large number of stations at different zones to achieve a coherent picture of energy balance in the region.

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Geological Society, London, Special Publications

The Himalayan Cryosphere: Past and Present

N.C. Pant
N.C. Pant
University of Delhi, India
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R. Ravindra
R. Ravindra
National Centre for Antarctic and Ocean Research, India
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D. Srivastava
D. Srivastava
Geological Survey of India, India
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L.G. Thompson
L.G. Thompson
The Ohio State University, USA
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The Geological Society of London
Volume
462
ISBN electronic:
9781786203434
Publication date:
January 01, 2018

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