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Evolution of glacial flow and drainage during the ablation season

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Title: Evolution of glacial flow and drainage during the ablation season
Authors: Jobard, S. Sylvain.Jobard@univ-savoie.fr, Dzikowski, M.1 Marc.Dzikowski@univ-savoie.fr
Source: Journal of Hydrology. Nov2006, Vol. 330 Issue 3/4, p663-671. 9p.
Subjects: Agricultural engineering, Sewerage, Dominant ideologies, Earth sciences
Abstract: Summary: Proglacial discharge is controlled by the geometry of the glacial drainage network and by meltwater processes. The glacial drainage systems of some alpine glaciers have been characterised using a model based on a proglacial discharge analysis. In this paper, we apply high frequency systemic analysis to data collected from the Baounet Glacier (French Alps) during two successive ablation seasons. Our approach is based on an analysis of the evolution of daily recession curves during the ablation period. The observed data are fitted by a single 〈β〉-coefficient dependant recession law. Changes in 〈β〉 are compared to variations in the daily discharge amplitude and the time lag between air temperature and proglacial discharge. The changes in the 〈β〉 values do not appear to be related to changes in the time lag and the amplitude of the daily discharge. There were significant variations in the 〈β〉-coefficient during the two ablation periods studied here even if there was no time lag or the daily discharge amplitude change. High values of 〈β〉 correspond to high drainage velocities; therefore increases in 〈β〉 values can be used as an indicator of the evolution of the glacier’s internal drainage network. [Copyright &y& Elsevier]
Copyright of Journal of Hydrology is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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DbLabel: Engineering Source
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AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
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  Data: Evolution of glacial flow and drainage during the ablation season
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  Data: <searchLink fieldCode="AR" term="%22Jobard%2C+S%2E%22">Jobard, S.</searchLink><i> Sylvain.Jobard@univ-savoie.fr</i><br /><searchLink fieldCode="AR" term="%22Dzikowski%2C+M%2E%22">Dzikowski, M.</searchLink><relatesTo>1</relatesTo><i> Marc.Dzikowski@univ-savoie.fr</i>
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Hydrology%22">Journal of Hydrology</searchLink>. Nov2006, Vol. 330 Issue 3/4, p663-671. 9p.
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  Data: <searchLink fieldCode="DE" term="%22Agricultural+engineering%22">Agricultural engineering</searchLink><br /><searchLink fieldCode="DE" term="%22Sewerage%22">Sewerage</searchLink><br /><searchLink fieldCode="DE" term="%22Dominant+ideologies%22">Dominant ideologies</searchLink><br /><searchLink fieldCode="DE" term="%22Earth+sciences%22">Earth sciences</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Summary: Proglacial discharge is controlled by the geometry of the glacial drainage network and by meltwater processes. The glacial drainage systems of some alpine glaciers have been characterised using a model based on a proglacial discharge analysis. In this paper, we apply high frequency systemic analysis to data collected from the Baounet Glacier (French Alps) during two successive ablation seasons. Our approach is based on an analysis of the evolution of daily recession curves during the ablation period. The observed data are fitted by a single 〈β〉-coefficient dependant recession law. Changes in 〈β〉 are compared to variations in the daily discharge amplitude and the time lag between air temperature and proglacial discharge. The changes in the 〈β〉 values do not appear to be related to changes in the time lag and the amplitude of the daily discharge. There were significant variations in the 〈β〉-coefficient during the two ablation periods studied here even if there was no time lag or the daily discharge amplitude change. High values of 〈β〉 correspond to high drainage velocities; therefore increases in 〈β〉 values can be used as an indicator of the evolution of the glacier’s internal drainage network. [Copyright &y& Elsevier]
– Name: AbstractSuppliedCopyright
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  Group: Ab
  Data: <i>Copyright of Journal of Hydrology is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1016/j.jhydrol.2006.04.031
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      – Code: eng
        Text: English
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        PageCount: 9
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      – SubjectFull: Agricultural engineering
        Type: general
      – SubjectFull: Sewerage
        Type: general
      – SubjectFull: Dominant ideologies
        Type: general
      – SubjectFull: Earth sciences
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      – TitleFull: Evolution of glacial flow and drainage during the ablation season
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              Text: Nov2006
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              Y: 2006
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