Elevation, volume and terminus changes of nine glaciers in North America
| Autor: | William D. Harrison, J. J. Sapiano, Keith A. Echelmeyer |
|---|---|
| Rok vydání: | 1998 |
| Předmět: |
010506 paleontology
geography geography.geographical_feature_category 010504 meteorology & atmospheric sciences Thinning Glacier Volume change 01 natural sciences sense organs Physical geography skin and connective tissue diseases Geology 0105 earth and related environmental sciences Earth-Surface Processes |
| Zdroj: | Journal of Glaciology. 44:119-135 |
| ISSN: | 1727-5652 0022-1430 |
| DOI: | 10.1017/s0022143000002410 |
| Popis: | Nine glaciers in Alaska and Washington, U.S.A., originally mapped as part of the International Geophysical Year (IGY) in 1957—58, were re-mapped between 1993 and 1996, eight using airborne surface elevation profiling and the ninth using ground-based kinematic global positioning system methods. Elevation, volume and terminus changes were determined for the approximately 38 year period between the IGY mapping and the profiling, All nine glaciers showed substantial thinning at lower elevations; seven of the nine thickened at higher elevations. None of the glaciers had a significant net volume increase; two had close to zero change, and the others had a decrease. For the eight glaciers for which we could obtain quantitative information, the mean thickness change was -10 m with a large scatter, 8 m standard deviation. The volume and terminus changes had no clear geographic pattern, and no simple relationship between volume change and terminus advance or retreat was identified. The largest error in the estimated volume changes is due to map errors. |
| Databáze: | OpenAIRE |
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