Skip to main content
padlock icon - secure page this page is secure

Recent changes in the snout position and surface velocity of Gangotri glacier observed from space

Buy Article:

$60.00 + tax (Refund Policy)

Glacier mass variations have a direct impact on some of the key components of the global water cycle, including sea level rise and freshwater availability. Apart from being one of the largest Himalayan glaciers, Gangotri is one of the sources of water for the Ganges river, which has a considerable influence on the socioeconomic structure of a largely over-populated catchment area accounting for ∼26% of India’s landmass. In this study, we present the most recent assessment of the Gangotri glacier dynamics, combining the use of interferometric techniques on synthetic aperture radar data and sub-pixel offset tracking on Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) satellite imagery. Results show that on average, the Gangotri glacier snout has receded at a rate of 21.3 ± 3 m year−1 over a period of 6 years (2004–2010). While glacier surface velocity near the snout is estimated to be between 24.8 ± 2.3 and 28.9 ± 2.3 m year−1, interior portions of the glacier recorded velocities in the range of 13.9 ± 2.3 to 70.2 ± 2.3 m year−1. Further, the average glacier surface velocity in the northern (lower) portions (28.1 ± 2.3 m year−1) is observed to be significantly lower than in the southern (higher) portions (48.1 ± 2.3 m year−1) of the Gangotri glacier. These values are calculated with an uncertainty of less than 5 m year−1. Results also highlight a consistent retreat and non-uniform dynamics of the Gangotri glacier.
No Reference information available - sign in for access.
No Citation information available - sign in for access.
No Supplementary Data.
No Article Media
No Metrics

Document Type: Research Article

Affiliations: 1: Department of Applied Geophysics, Indian School of Mines, Dhanbad, India 2: Department of Applied Geology, Indian School of Mines, Dhanbad, India 3: Department of Earth System Science, University of California, Irvine, CA, USA 4: Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, USA

Publication date: December 20, 2013

More about this publication?
  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
X
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more