000029401 001__ 29401
000029401 041__ $$aEnglish
000029401 100__ $$aBolch, T.
000029401 245__ $$aMulti-Decadal Mass Loss of Glaciers in the Everest Area (Nepal Himalaya) Derived from Stereo Imagery
000029401 269__ $$cMarch 2014
000029401 260__ $$c2011
000029401 300__ $$a349-358
000029401 511__ $$aCrysparticle
000029401 511__ $$aCrysparticle
000029401 520__ $$aMass loss of Himalayan glaciers has wide-ranging consequences such as changing runoff distribution, sea level rise and an increasing risk of glacial lake outburst floods (GLOFs). The assessment of the regional and global impact of glacier changes in the Himalaya is, however, hampered by a lack of mass balance data for most of the range. Multi-temporal digital terrain models (DTMs) allow glacier mass balance to be calculated. Here, we present a time series of mass changes for ten glaciers covering an area of about 50 km2 south and west of Mt. Everest, Nepal, using stereo Corona spy imagery (years 1962 and 1970), aerial images and recent high resolution satellite data (Cartosat-1). This is the longest time series of mass changes in the Himalaya. We reveal that the glaciers have been significantly losing mass since at least 1970, despite thick debris cover. The specific mass loss for 1970–2007 is 0.32 ± 0.08 m w.e. a−1, however, not higher than the global average. Comparisons of the recent DTMs with earlier time periods indicate an accelerated mass loss. This is, however, hardly statistically significant due to high uncertainty, especially of the lower resolution ASTER DTM. The characteristics of surface lowering can be explained by spatial variations of glacier velocity, the thickness of the debris-cover, and ice melt due to exposed ice cliffs and ponds.
000029401 650__ $$aGlaciers
000029401 700__ $$aPieczonka, T.
000029401 700__ $$aBenn, D. I.
000029401 773__ $$pThe Cryosphere
000029401 773__ $$v5 (2)
000029401 773__ $$a10.5194/tc-5-349-2011
000029401 8564_ $$uhttp://www.the-cryosphere.net/5/349/2011/tc-5-349-2011.html$$ySource link (opan access)
000029401 980__ $$aARTICLE