Short term variations of tracer transit speed on alpine glaciers
We first present the results of a series of tracer experiments conducted on an alpine glacier (Gornergletscher, Switzerland) over a diurnal discharge cycle. For these injections, a moulin was used into which an ice marginal lake was draining, providing a relatively constant discharge. The measured t...
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Copernicus Publications
2010
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fttriple:oai:gotriple.eu:oai:doaj.org/article:7cd60b07ec0f4a2584b9e9cdeb04eec5 2023-05-15T18:32:22+02:00 Short term variations of tracer transit speed on alpine glaciers M. A. Werder T. V. Schuler M. Funk 2010-09-01 https://doi.org/10.5194/tc-4-381-2010 http://www.the-cryosphere.net/4/381/2010/tc-4-381-2010.pdf https://doaj.org/article/7cd60b07ec0f4a2584b9e9cdeb04eec5 en eng Copernicus Publications doi:10.5194/tc-4-381-2010 1994-0416 1994-0424 http://www.the-cryosphere.net/4/381/2010/tc-4-381-2010.pdf https://doaj.org/article/7cd60b07ec0f4a2584b9e9cdeb04eec5 undefined The Cryosphere, Vol 4, Iss 3, Pp 381-396 (2010) geo envir Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2010 fttriple https://doi.org/10.5194/tc-4-381-2010 2023-01-22T17:44:18Z We first present the results of a series of tracer experiments conducted on an alpine glacier (Gornergletscher, Switzerland) over a diurnal discharge cycle. For these injections, a moulin was used into which an ice marginal lake was draining, providing a relatively constant discharge. The measured tracer transit speeds show two diurnal maxima and minima. These findings are qualitatively different to existing observations from two series of injections conducted at Unteraargletscher (Switzerland) using a moulin fed by supraglacial meltwater having a high diurnal variability, which displayed one diurnal maximum and minimum. We then develop and use a simple two-component model of the glacier drainage system, comprising a moulin and a channel element, to simulate the measured transit speeds for all three injection series. The model successfully reproduces all the observations and shows that the same underlying processes can produce the qualitatively different behaviour depending on the different moulin input discharge regimes. Using the model, we assess the relative importance of the different measurement quantities, show that frequent measurements of moulin input discharge are indispensable and propose an experiment design to monitor the development of the drainage system over several weeks. Article in Journal/Newspaper The Cryosphere Unknown Marginal Lake ENVELOPE(163.500,163.500,-74.600,-74.600) The Cryosphere 4 3 381 396 |
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language |
English |
topic |
geo envir |
spellingShingle |
geo envir M. A. Werder T. V. Schuler M. Funk Short term variations of tracer transit speed on alpine glaciers |
topic_facet |
geo envir |
description |
We first present the results of a series of tracer experiments conducted on an alpine glacier (Gornergletscher, Switzerland) over a diurnal discharge cycle. For these injections, a moulin was used into which an ice marginal lake was draining, providing a relatively constant discharge. The measured tracer transit speeds show two diurnal maxima and minima. These findings are qualitatively different to existing observations from two series of injections conducted at Unteraargletscher (Switzerland) using a moulin fed by supraglacial meltwater having a high diurnal variability, which displayed one diurnal maximum and minimum. We then develop and use a simple two-component model of the glacier drainage system, comprising a moulin and a channel element, to simulate the measured transit speeds for all three injection series. The model successfully reproduces all the observations and shows that the same underlying processes can produce the qualitatively different behaviour depending on the different moulin input discharge regimes. Using the model, we assess the relative importance of the different measurement quantities, show that frequent measurements of moulin input discharge are indispensable and propose an experiment design to monitor the development of the drainage system over several weeks. |
format |
Article in Journal/Newspaper |
author |
M. A. Werder T. V. Schuler M. Funk |
author_facet |
M. A. Werder T. V. Schuler M. Funk |
author_sort |
M. A. Werder |
title |
Short term variations of tracer transit speed on alpine glaciers |
title_short |
Short term variations of tracer transit speed on alpine glaciers |
title_full |
Short term variations of tracer transit speed on alpine glaciers |
title_fullStr |
Short term variations of tracer transit speed on alpine glaciers |
title_full_unstemmed |
Short term variations of tracer transit speed on alpine glaciers |
title_sort |
short term variations of tracer transit speed on alpine glaciers |
publisher |
Copernicus Publications |
publishDate |
2010 |
url |
https://doi.org/10.5194/tc-4-381-2010 http://www.the-cryosphere.net/4/381/2010/tc-4-381-2010.pdf https://doaj.org/article/7cd60b07ec0f4a2584b9e9cdeb04eec5 |
long_lat |
ENVELOPE(163.500,163.500,-74.600,-74.600) |
geographic |
Marginal Lake |
geographic_facet |
Marginal Lake |
genre |
The Cryosphere |
genre_facet |
The Cryosphere |
op_source |
The Cryosphere, Vol 4, Iss 3, Pp 381-396 (2010) |
op_relation |
doi:10.5194/tc-4-381-2010 1994-0416 1994-0424 http://www.the-cryosphere.net/4/381/2010/tc-4-381-2010.pdf https://doaj.org/article/7cd60b07ec0f4a2584b9e9cdeb04eec5 |
op_rights |
undefined |
op_doi |
https://doi.org/10.5194/tc-4-381-2010 |
container_title |
The Cryosphere |
container_volume |
4 |
container_issue |
3 |
container_start_page |
381 |
op_container_end_page |
396 |
_version_ |
1766216468220870656 |