000034410 001__ 34410
000034410 037__ $$aARTICLE--2019-006
000034410 041__ $$aEnglish
000034410 100__ $$aBrun, F.
000034410 100__ $$aBuri, P.
000034410 100__ $$aMiles, E. S.
000034410 100__ $$aWagnon, P.
000034410 100__ $$aSteiner, J.
000034410 100__ $$aBerthier, E.
000034410 100__ $$aRagettli, S.
000034410 100__ $$aKraaijenbrink, P.
000034410 100__ $$aImmerzeel, W. W.
000034410 100__ $$aPellicciotti, F.
000034410 245__ $$aQuantifying volume loss from ice cliffs on debris-covered glaciers using high-resolution terrestrial and aerial photogrammetry
000034410 260__ $$c2019
000034410 300__ $$a684–695
000034410 507__ $$aPATRICK WAGNON, ICIMOD staff, peerreviewed
000034410 511__ $$aCrysparticle
000034410 520__ $$aMass losses originating from supraglacial ice cliffs at the lower tongues of debris-covered glaciers are a potentially large component of the mass balance, but have rarely been quantified. In this study, we develop a method to estimate ice cliff volume losses based on high-resolution topographic data derived from terrestrial and aerial photogrammetry. We apply our method to six cliffs monitored in May and October 2013 and 2014 using four different topographic datasets collected over the debris-covered Lirung Glacier of the Nepalese Himalayas. During the monsoon, the cliff mean backwasting rate was relatively consistent in 2013 (3.8 ± 0.3 cm w.e. d −1 ) and more heterogeneous among cliffs in 2014 (3.1 ± 0.7 cm w.e. d −1 ), and the geometric variations between cliffs are larger. Their mean backwasting rate is significantly lower in winter (October 2013–May 2014), at 1.0 ± 0.3 cm w.e. d −1 . These results are consistent with estimates of cliff ablation from an energy-balance model developed in a previous study. The ice cliffs lose mass at rates six times higher than estimates of glacier-wide melt under debris, which seems to confirm that ice cliffs provide a large contribution to total glacier melt.
000034410 653__ $$aDebris-covered glaciers
000034410 653__ $$aIce cliffs
000034410 653__ $$aIce volume losses
000034410 653__ $$aStructure for motion
000034410 653__ $$aTerrestrial and aerial photogrammetry
000034410 650__ $$aCryosphere
000034410 773__ $$pJournal of Glaciology
000034410 773__ $$v62
000034410 773__ $$n234
000034410 8564_ $$uhttps://doi.org/10.1017/jog.2016.5$$yExternal link (open access)
000034410 8560_ $$fjha.anil4@gmail.com
000034410 8564_ $$uhttp://lib.icimod.org/record/34410/files/Quantifying.pdf
000034410 8564_ $$uhttp://lib.icimod.org/record/34410/files/Quantifying.ps.gz
000034410 8564_ $$uhttp://lib.icimod.org/record/34410/files/Quantifying.png?subformat=icon$$xicon
000034410 8564_ $$uhttp://lib.icimod.org/record/34410/files/Quantifying.png?subformat=icon-180$$xicon-180
000034410 8564_ $$uhttp://lib.icimod.org/record/34410/files/Quantifying.png?subformat=icon-210$$xicon-210
000034410 8564_ $$uhttp://lib.icimod.org/record/34410/files/Quantifying.png?subformat=icon-600$$xicon-600
000034410 980__ $$aICIMODEXT