Quantifying the effects of climate and surface change on glacier mass balance / D.H. Elsberg, W.D. Harrison, K.A. Echelmeyer, R.M. Krimmel.

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245 00 ‡aQuantifying the effects of climate and surface change on glacier mass balance /‡cD.H. Elsberg, W.D. Harrison, K.A. Echelmeyer, R.M. Krimmel.
260 ## ‡a[S.l.] :‡b[s.n.],‡c2001.
300 ## ‡ap. 649-658 :‡bdiags., tables.
500 ## ‡aJournal of Glaciology. Vol. 47(159) :649-658 (2001).
520 3# ‡aSeeks to correct errors that arise when glacier mass change is computed by integrating specific mass-balance measurements over areas obtained from outdated maps. Takes into account changes in both surface area and surface elevation since map was made. Includes algorithm for reconciling differences between geodetic and glaciological measurements of glacier-wide mass balance. Distinguishes reference-surface balance, based on an unchanging surface, from conventional balance, based on the current, often poorly known, surface. The first directly reflects local climate change, the second includes effects of changing glacier area and topography. Obtains transformation between two balances in terms of specific mass balance curves and change in map-area. Correction for elevation change assumes specific balance is locally linear function of elevation unchanged by changes in glacier surface. Correction for area change requires near-terminus bedrock topography and annual measurement of terminus boundary. Demonstrates method using South Cascade Glacier, where glacier-wide cumulative reference and conventional balances differ by 16% over 27 years. Describes how specific balance curves were fit to and extrapolated above and below available field data. Discusses method for sparse datasets. Argues that reference balances are required for studies of glacier dynamics and climate change and urges their routine reporting.
650 07 ‡a551.321 -- Glaciological methods and instruments.‡2udc
650 07 ‡a551.324.22 -- Glaciers: South Cascade Glacier.‡2udc
650 07 ‡a551.324.43 -- Land ice, regime and mass balance.‡2udc
650 07 ‡a519.673 -- Modelling.‡2udc
650 07 ‡aE3 -- Glaciology: instruments and methods.‡2local
651 #7 ‡a(73) -- United States.‡2udc
651 #7 ‡a(79) -- Pacific states.‡2udc
651 #7 ‡a(237.1) -- Rockies and other mountains of western North America.‡2udc
700 1# ‡aElsberg, D. H.
700 1# ‡aHarrison, W. D.
700 1# ‡aEchelmeyer, K. A.
700 1# ‡aKrimmel, R. M.
773 0# ‡7nnas ‡tJournal of Glaciology. ‡gVol. 47(159) (2001) ‡wSPRI-20534
917 ## ‡aUnenhanced record from Muscat, imported 2019
948 3# ‡a20231003