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This study investigates elevation change ( dh ) and geodetic mass budget of glaciers in the Jankar Chhu Watershed (JCW), Lahaul Himalaya, India, based on the difference in ASTER DEMs during 2002–2018. Glacier-wide spatially heterogeneous  dh  patterns were evaluated in the context of morphological and topographical settings. During 2002–2018, glaciers show a mean annual elevation change rate ( dh/dt ) of −0.38 ± 0.10 m a −1 , resulting in a specific mass budget of −0.32 ± 0.09 m w.e.a −1 , close to the previously reported estimates in western Himalaya. Nearly stagnant thick debris-covered tongue (&gt;10% debris cover) characterized by melt hotspots exhibits maximum  dh  at up-glacier instead of the terminus. Debris-free glaciers (&lt;10% debris cover) show maximum  dh  near the terminus. Spatially heterogeneous  dh  under varying debris cover is interpreted as an insulating effect of debris thickness as validated by field measurements. We suggest that elevation change of debris-covered glaciers cannot be generalized and glacier-wide spatially detailed mapping of  dh  is necessary to better understand the control of different surface morphology under warming climatic conditions in the western Himalayas.

Spatially heterogeneous glacier elevation change in the Jankar Chhu Watershed, Lahaul Himalaya, India derived using ASTER DEMs