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Geological Survey (USGS) 1:63 360 topographic maps constructed from aerial photographs taken in 1950-52, Here we present their elevation and volume changes over this time interval. Six of the outlet glaciers were profiled in 1994, seven in 1996 and three in both 19. As part of these studies, we profiled the upper region of the Harding icefield, Alaska, and 13 outlet glaciers emanating from the icefield.
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Tests of this assumption arc limited (Rabus and Echelmeyer, in press), and it remains of interest to determine how glaciers of different geometries and types (tidewater vs land-terminating) in one region respond to a similar climate change.Ī new method has recently been developed for measuring profiles of mountain glaciers relatively quickly and accurately, that of airborne surface-elevation profiling ( Reference EchelmeyerEchelmeyer and others, 1996 Reference Sapiano, Harrison and EchelmeyerSapiano and others, 1998). However, these analyses were based on very limited data-sets, which, in many cases, entailed the assumption that the mass-balance record of one glacier is representative for a large region. Mountain glaciers and small ice caps are also believed to account for between one-third and one-half of observed rise in sea level, with the largest contribution From glaciers in the coastal mountains bordering the Gulf of Alaska ( Reference MeierMeier, 1984, 1990 Reference Dyurgerov and MeierDyurgerov and Meier, 1997). Reference Johannesson, Raymond and WaddingtonJohannesson and others, 1989 Oerlcmans. Small valley glaciers are believed to be sensitive indicators of climatic change, and many attempts have been made to establish the relation between glacier extent, volume and climate (e.g.