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  • Estimate of ablation rate of glacier ice under a supraglacial debris layer
  • Ablation glaciaire ; Débris supraglaciaires ; Eau de fonte ; Glacier ; Haute montagne ; Himalaya ; LANDSAT ; Méthodologie ; Népal ; Température de surface ; Télédétection
  • Glacial ablation ; Glacier ; High mountain ; Himalaya ; LANDSAT ; Meltwater ; Methodology ; Nepal ; Remote sensing ; Surface temperature
  • The ablation rate under a debris layer is very difficult to measure directly at debris-covered glaciers, because the surface is highly heterogeneous, and the ablation rate varies tremendously from place to place. This paper describes previous works
  • on the ablation process, and a test result of a proposed method to estimate the ablation rate under a debris layer is presented for the Lirung Glacier in Langtang Valley, Nepal Himalaya.
  • accumulation on those glaciers coincide with the ablation period. Therefore, the annual mass balance should be calculated neither by giving the place of annual accumulation to winter balance, nor annual ablation to summer balance. Rather, it is better done
  • by net accumulation and net ablation during the year. The monitored glaciers are few compared with the large glacierized area in China. Some estimative models are thus introduced.
  • Ablation glaciaire ; Accumulation glaciaire ; Bilan de masse ; Cordillera Blanca ; Glacier ; Glaciologie ; Haute montagne ; Méthodologie ; Pérou ; Zone intertropicale
  • Glacial ablation ; Glacial deposit ; Glacier ; Glacier mass balance ; Glaciology ; High mountain ; Methodology ; Peru ; Tropical zone
  • topographical setting provides both spatial and temporal subdivisions in humid and dry regimes in one region. A combination of ablation measurements and the application of the flux divergence method for the determination of accumulation is proposed.
  • Ablation glaciaire ; Alaska ; Bilan de masse ; Glacier ; Géodésie ; Mesure ; Photographie aérienne ; Siècle 20 ; Télédétection ; Zone froide
  • Aerial photography ; Alaska ; Cold area ; Geodesy ; Glacial ablation ; Glacier ; Glacier mass balance ; Measurement ; Remote sensing ; Twentieth Century
  • This contribution explains the characteristics of a newly developed ice drill which is particularly geared to the needs of glaciologists. It is primarily designed for drilling holes for ablation stakes and for measuring water levels or temperatures
  • model, systematic snow probing error and ablation gradient calculation on the mass balance of the glacier can be investigated. It is evident that the measure of total mass balance of Storglaciären is not sensitive to variations in these parameters
  • that are missing from the direct method are basal melt, internal melt, and ablation on crevasse walls. Possible systematic measurement errors include under-estimation of the density of lost material, sinking stakes, or poorly represented areas.
  • -15 accumulation pits and 30-90 ablation stakes on 9 km2. The geodetic method has been applied for longer periods and yields results consistent with those of the glaciological method. The balance velocity calculated from recent ice thickness soundings
  • The kinematic boundary condition at the surface is utilized to arrive at an estimate of the mass-balance distribution of the ablation region of Unteraar Glacier, Bernese Alps, Switzerland. This is achieved without the use of any ground measurements