The composition of the englacial and subglacial component in bulk meltwaters draining the Gornergletscher, Switzerland
Abstract A new method of hydrograph separation for bulk meltwaters draining Alpine glaciers is proposed. It is based on the two-component (subglacial and englacial) mixing model of Collins (1978), but allows the composition of the subglacial component to vary between ascending and descending lines o...
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Language: | English |
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Cambridge University Press (CUP)
1991
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Online Access: | http://dx.doi.org/10.1017/s0022143000042805 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000042805 |
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crcambridgeupr:10.1017/s0022143000042805 2024-09-15T18:15:38+00:00 The composition of the englacial and subglacial component in bulk meltwaters draining the Gornergletscher, Switzerland Tranter, Martyn Raiswell, Robert 1991 http://dx.doi.org/10.1017/s0022143000042805 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000042805 en eng Cambridge University Press (CUP) Journal of Glaciology volume 37, issue 125, page 59-66 ISSN 0022-1430 1727-5652 journal-article 1991 crcambridgeupr https://doi.org/10.1017/s0022143000042805 2024-08-07T04:03:47Z Abstract A new method of hydrograph separation for bulk meltwaters draining Alpine glaciers is proposed. It is based on the two-component (subglacial and englacial) mixing model of Collins (1978), but allows the composition of the subglacial component to vary between ascending and descending lines of the hydrograph. The mean englacial component can be derived from linear relationships between sulphate concentrations and other ions in bulk meltwaters. On certain occasions during the ablation season, the maximum concentration of ions in the subglacial component can be determined from the linear relationship between bulk meltwater sulphate concentrations and discharge. The bulk discharge is then a direct measure of the mass fraction of the englacial component. At maximum discharge, the contribution of the subglacial component approaches zero, which has implications for the storage and mixing of waters in subglacial reservoirs. Further, the subglacial component is not of constant composition, and may itself be a mixture of dilute supraglacial and concentrated subglacial water. Article in Journal/Newspaper Journal of Glaciology Cambridge University Press Journal of Glaciology 37 125 59 66 |
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Open Polar |
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Cambridge University Press |
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crcambridgeupr |
language |
English |
description |
Abstract A new method of hydrograph separation for bulk meltwaters draining Alpine glaciers is proposed. It is based on the two-component (subglacial and englacial) mixing model of Collins (1978), but allows the composition of the subglacial component to vary between ascending and descending lines of the hydrograph. The mean englacial component can be derived from linear relationships between sulphate concentrations and other ions in bulk meltwaters. On certain occasions during the ablation season, the maximum concentration of ions in the subglacial component can be determined from the linear relationship between bulk meltwater sulphate concentrations and discharge. The bulk discharge is then a direct measure of the mass fraction of the englacial component. At maximum discharge, the contribution of the subglacial component approaches zero, which has implications for the storage and mixing of waters in subglacial reservoirs. Further, the subglacial component is not of constant composition, and may itself be a mixture of dilute supraglacial and concentrated subglacial water. |
format |
Article in Journal/Newspaper |
author |
Tranter, Martyn Raiswell, Robert |
spellingShingle |
Tranter, Martyn Raiswell, Robert The composition of the englacial and subglacial component in bulk meltwaters draining the Gornergletscher, Switzerland |
author_facet |
Tranter, Martyn Raiswell, Robert |
author_sort |
Tranter, Martyn |
title |
The composition of the englacial and subglacial component in bulk meltwaters draining the Gornergletscher, Switzerland |
title_short |
The composition of the englacial and subglacial component in bulk meltwaters draining the Gornergletscher, Switzerland |
title_full |
The composition of the englacial and subglacial component in bulk meltwaters draining the Gornergletscher, Switzerland |
title_fullStr |
The composition of the englacial and subglacial component in bulk meltwaters draining the Gornergletscher, Switzerland |
title_full_unstemmed |
The composition of the englacial and subglacial component in bulk meltwaters draining the Gornergletscher, Switzerland |
title_sort |
composition of the englacial and subglacial component in bulk meltwaters draining the gornergletscher, switzerland |
publisher |
Cambridge University Press (CUP) |
publishDate |
1991 |
url |
http://dx.doi.org/10.1017/s0022143000042805 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000042805 |
genre |
Journal of Glaciology |
genre_facet |
Journal of Glaciology |
op_source |
Journal of Glaciology volume 37, issue 125, page 59-66 ISSN 0022-1430 1727-5652 |
op_doi |
https://doi.org/10.1017/s0022143000042805 |
container_title |
Journal of Glaciology |
container_volume |
37 |
container_issue |
125 |
container_start_page |
59 |
op_container_end_page |
66 |
_version_ |
1810453523335217152 |