Mass-Balance Measurements: Problems and two New Methods of Determining Variations
Abstract The optimum continuation of series of mass-balance measurements and their extension to unmonitored glaciers are important problems in contemporary glaciology. For this purpose, two new practical survey methods are proposed, based on the linear-balance variations model of Lliboutry (1974). T...
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Cambridge University Press (CUP)
1986
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crcambridgeupr:10.1017/s0022143000012168 2024-03-03T08:45:59+00:00 Mass-Balance Measurements: Problems and two New Methods of Determining Variations Reynaud, Louis Vallon, Michel Letreguilly, Anne 1986 http://dx.doi.org/10.1017/s0022143000012168 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000012168 en eng Cambridge University Press (CUP) Journal of Glaciology volume 32, issue 112, page 446-454 ISSN 0022-1430 1727-5652 Earth-Surface Processes journal-article 1986 crcambridgeupr https://doi.org/10.1017/s0022143000012168 2024-02-08T08:40:23Z Abstract The optimum continuation of series of mass-balance measurements and their extension to unmonitored glaciers are important problems in contemporary glaciology. For this purpose, two new practical survey methods are proposed, based on the linear-balance variations model of Lliboutry (1974). The first method is a simplified application of the linear model that uses only a data set limited to selected fixed-measurement sites. It was developed to obtain the mass-balance variation in cases where data are too scarce to obtain the global mass balance or to apply the Lliboutry algorithm. This simplified linear model is used with the 8 years’ of surveys on glacier d’Argentière. The second method uses the continuity equation to derive the mass balance of a glacier sector delimited by two cross-profiles where the surface velocities, surface altitudes, and depths are known. By using this continuity method , the entire mass-balance series is established for a sector of glacier de Gébroulaz (Vanoise area, France) from 1908 to 1950, as well as for two sectors of Unteraargletscher (Oberland, Switzerland) from 1924 to 1981. Article in Journal/Newspaper Journal of Glaciology Cambridge University Press Journal of Glaciology 32 112 446 454 |
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Open Polar |
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Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Earth-Surface Processes |
spellingShingle |
Earth-Surface Processes Reynaud, Louis Vallon, Michel Letreguilly, Anne Mass-Balance Measurements: Problems and two New Methods of Determining Variations |
topic_facet |
Earth-Surface Processes |
description |
Abstract The optimum continuation of series of mass-balance measurements and their extension to unmonitored glaciers are important problems in contemporary glaciology. For this purpose, two new practical survey methods are proposed, based on the linear-balance variations model of Lliboutry (1974). The first method is a simplified application of the linear model that uses only a data set limited to selected fixed-measurement sites. It was developed to obtain the mass-balance variation in cases where data are too scarce to obtain the global mass balance or to apply the Lliboutry algorithm. This simplified linear model is used with the 8 years’ of surveys on glacier d’Argentière. The second method uses the continuity equation to derive the mass balance of a glacier sector delimited by two cross-profiles where the surface velocities, surface altitudes, and depths are known. By using this continuity method , the entire mass-balance series is established for a sector of glacier de Gébroulaz (Vanoise area, France) from 1908 to 1950, as well as for two sectors of Unteraargletscher (Oberland, Switzerland) from 1924 to 1981. |
format |
Article in Journal/Newspaper |
author |
Reynaud, Louis Vallon, Michel Letreguilly, Anne |
author_facet |
Reynaud, Louis Vallon, Michel Letreguilly, Anne |
author_sort |
Reynaud, Louis |
title |
Mass-Balance Measurements: Problems and two New Methods of Determining Variations |
title_short |
Mass-Balance Measurements: Problems and two New Methods of Determining Variations |
title_full |
Mass-Balance Measurements: Problems and two New Methods of Determining Variations |
title_fullStr |
Mass-Balance Measurements: Problems and two New Methods of Determining Variations |
title_full_unstemmed |
Mass-Balance Measurements: Problems and two New Methods of Determining Variations |
title_sort |
mass-balance measurements: problems and two new methods of determining variations |
publisher |
Cambridge University Press (CUP) |
publishDate |
1986 |
url |
http://dx.doi.org/10.1017/s0022143000012168 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000012168 |
genre |
Journal of Glaciology |
genre_facet |
Journal of Glaciology |
op_source |
Journal of Glaciology volume 32, issue 112, page 446-454 ISSN 0022-1430 1727-5652 |
op_doi |
https://doi.org/10.1017/s0022143000012168 |
container_title |
Journal of Glaciology |
container_volume |
32 |
container_issue |
112 |
container_start_page |
446 |
op_container_end_page |
454 |
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1792501741548208128 |