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Open AccessArticle

Glacier Changes on the Pik Topografov Massif, East Sayan Range, Southeast Siberia, from Remote Sensing Data

1
Limnological Institute of the Siberian Branch of the Russian Academy of Sciences (SB RAS), 3, Ulan-Batorskaya Str., Irkutsk 664033, Russia
2
V.B. Sochava Institute of Geography of the Siberian Branch of the Russian Academy of Sciences (SB RAS), 1, Ulan-Batorskaya Str., Irkutsk 664033, Russia
*
Author to whom correspondence should be addressed.
Geosciences 2018, 8(5), 148; https://doi.org/10.3390/geosciences8050148
Received: 29 March 2018 / Revised: 19 April 2018 / Accepted: 23 April 2018 / Published: 24 April 2018
(This article belongs to the Special Issue Remote Sensing of Land Ice)
Small mountain glaciers represent the most abundant class in many glaciarized areas around the world; however, less is known about their recent area changes under climatic variability of the last decades. The recent fluctuations of glaciers located in the inner parts of continents are the least studied. In this study we present the results of repeated mapping of seven small (<1.5 km2) glaciers located in a continental setting on the northern slope of the Pik Topografov massif, East Sayan Range, southeast Siberia. The multitemporal glacier inventory was derived from the late summer Landsat TM/ETM+ scenes acquired between 1986 and 2010. Glacier outlines were mapped with thresholded ratio (TM3/TM5) method. Topographic inventory parameters were measured from SRTM DEM. Glacier outlines of the Little Ice Age maximum (LIA, ~1850) were reconstructed from terminal moraines widely distributed around the glacier snouts. The results indicate a total ice area decrease from 8.1 km2 in the LIA to 3.8 km2 in 2010 (53%, 0.33% year−1). We revealed accelerated area shrinkage between 1991 and 2001 (almost two times higher than during the period 1986–2010), while between 2001 and 2010, the ice area did not change significantly. Overall, the glacier changes are consistent with the regional climatic trends (winter precipitation and summer temperature). Local topographic settings significantly impacted the glacier dynamics. View Full-Text
Keywords: East Sayan; Pik Topografov; small glaciers; remote sensing; Landsat; SRTM; glacier change; climate change; glacier topography East Sayan; Pik Topografov; small glaciers; remote sensing; Landsat; SRTM; glacier change; climate change; glacier topography
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Osipov, E.Y.; Osipova, O.P. Glacier Changes on the Pik Topografov Massif, East Sayan Range, Southeast Siberia, from Remote Sensing Data. Geosciences 2018, 8, 148.

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