Abstract

Glaciers are one of the key indicators of present and past climatic variations, which responses in the form of retreat or advancement. The frontal characteristics of glaciers constitute the important aspect of glaciological studies and the data obtained gives overall pictures about behaviour of glacier and effect of climate. Due to limitation of satellite data and difficulty in demarcation of actual glacier termini on satellite images, the ground-based monitoring of glaciers fronts and their comparative study with past satellite images were carried out on three glaciers viz. Miyar, Takdung and Uldhampu glaciers, situated in Miyar basin, Lahaul & Spiti district of Himachal Pradesh. This paper presents recessional parameters of glaciers based on field survey and historical satellite images. The studies indicate that the snout of Miyar, Takdung and Uldhampu glaciers have retreated by 1205 m (1962–2017), 270 m (1989–2017) and 130 m (1989–2017) by vacating an area of 0.76, 0.063 and 0.035 square kilometre respectively. Climatic data from 1989–2002 was utilized to correlate recessional trend of all studied glaciers, the precipitation and temperature data supports the given retreat trend by rise in average temperature and lowering precipitation values over data range.

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