Glacier surface velocities in the Jankar Chhu Watershed, western Himalaya, India: Study using Landsat time series data (1992–2020)

This study presents a spatial and temporal surface velocity analysis of 33 glaciers in the Jankar Chhu Watershed (JCW), western Himalaya. The surface velocity was computed using the Co-registration of Optically Sensed Images and Correlation (COSI-Corr) tool on the Landsat images spanning nearly thre...

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Bibliographic Details
Published in:Remote sensing applications 2021-11, Vol.24, p.100615, Article 100615
Main Authors: Das, Suresh, Sharma, Milap Chand
Format: Article
Language:English
Subjects:
COSI-Corr
Feature tracking
Glacier velocity
Himalaya
Jankar Chhu watershed
Landsat image
NCEP/NCAR gridded data
Topographic factors
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Summary:This study presents a spatial and temporal surface velocity analysis of 33 glaciers in the Jankar Chhu Watershed (JCW), western Himalaya. The surface velocity was computed using the Co-registration of Optically Sensed Images and Correlation (COSI-Corr) tool on the Landsat images spanning nearly three decades (1992–2020). Long-term (1948–2018) inter-annual and seasonal climatic trends are also evaluated based on the US NCEP/NCAR reanalyzed gridded data. The role of several topographic and climatic parameters was examined to characterize heterogeneity in velocity. Glaciers in the JCW exhibit three distinct spatial velocity patterns. The type-I glaciers show nearly stagnant (60 m yrˉ1 in the debris-free accumulation area. The type-II glaciers exhibit active tongues (>50 m yrˉ1) yet have slow movement in the accumulation zone. The type-III glaciers show prolonged (30°) showing maximum ice movement at higher elevations, while debris-covered tongues in the low elevations having gentle slopes (
ISSN:2352-9385
2352-9385
DOI:10.1016/j.rsase.2021.100615