The use of planimetric surface area in glacier mass-balance calculations: a potential source of errors
Abstract Large errors in the estimation of glacier ablation and accumulation may arise from the uncritical use of planimetric surface areas in volume calculations based on specific point values. Three-dimensional digital terrain models of glacier surfaces show that the actual surface area is likely...
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Language: | English |
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Cambridge University Press (CUP)
1995
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Online Access: | http://dx.doi.org/10.1017/s0022143000034766 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000034766 |
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crcambridgeupr:10.1017/s0022143000034766 2024-03-03T08:46:03+00:00 The use of planimetric surface area in glacier mass-balance calculations: a potential source of errors Jacobsen, Frank M. Theakstone, Wilfred H. 1995 http://dx.doi.org/10.1017/s0022143000034766 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000034766 en eng Cambridge University Press (CUP) Journal of Glaciology volume 41, issue 139, page 441-444 ISSN 0022-1430 1727-5652 Earth-Surface Processes journal-article 1995 crcambridgeupr https://doi.org/10.1017/s0022143000034766 2024-02-08T08:38:15Z Abstract Large errors in the estimation of glacier ablation and accumulation may arise from the uncritical use of planimetric surface areas in volume calculations based on specific point values. Three-dimensional digital terrain models of glacier surfaces show that the actual surface area is likely to be substantially larger than the planimetric area; with high-resolution digital terrain models, approximations of the true surface area may be as much as 20% larger. The errors are sufficient for questions to be raised about some calculations of water storage in glaciers, because incorrect surface-area values may result in ablation being underestimated substantially. Errors may also be introduced into calculations of radiation-energy inputs to a crevassed glacier surface. Article in Journal/Newspaper Journal of Glaciology Cambridge University Press Journal of Glaciology 41 139 441 444 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Earth-Surface Processes |
spellingShingle |
Earth-Surface Processes Jacobsen, Frank M. Theakstone, Wilfred H. The use of planimetric surface area in glacier mass-balance calculations: a potential source of errors |
topic_facet |
Earth-Surface Processes |
description |
Abstract Large errors in the estimation of glacier ablation and accumulation may arise from the uncritical use of planimetric surface areas in volume calculations based on specific point values. Three-dimensional digital terrain models of glacier surfaces show that the actual surface area is likely to be substantially larger than the planimetric area; with high-resolution digital terrain models, approximations of the true surface area may be as much as 20% larger. The errors are sufficient for questions to be raised about some calculations of water storage in glaciers, because incorrect surface-area values may result in ablation being underestimated substantially. Errors may also be introduced into calculations of radiation-energy inputs to a crevassed glacier surface. |
format |
Article in Journal/Newspaper |
author |
Jacobsen, Frank M. Theakstone, Wilfred H. |
author_facet |
Jacobsen, Frank M. Theakstone, Wilfred H. |
author_sort |
Jacobsen, Frank M. |
title |
The use of planimetric surface area in glacier mass-balance calculations: a potential source of errors |
title_short |
The use of planimetric surface area in glacier mass-balance calculations: a potential source of errors |
title_full |
The use of planimetric surface area in glacier mass-balance calculations: a potential source of errors |
title_fullStr |
The use of planimetric surface area in glacier mass-balance calculations: a potential source of errors |
title_full_unstemmed |
The use of planimetric surface area in glacier mass-balance calculations: a potential source of errors |
title_sort |
use of planimetric surface area in glacier mass-balance calculations: a potential source of errors |
publisher |
Cambridge University Press (CUP) |
publishDate |
1995 |
url |
http://dx.doi.org/10.1017/s0022143000034766 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000034766 |
genre |
Journal of Glaciology |
genre_facet |
Journal of Glaciology |
op_source |
Journal of Glaciology volume 41, issue 139, page 441-444 ISSN 0022-1430 1727-5652 |
op_doi |
https://doi.org/10.1017/s0022143000034766 |
container_title |
Journal of Glaciology |
container_volume |
41 |
container_issue |
139 |
container_start_page |
441 |
op_container_end_page |
444 |
_version_ |
1792501885470507008 |