Explaining the presence of perennial liquid water bodies in the firn of the Greenland Ice Sheet
Recent observations have shown that the firn layer on the Greenland Ice Sheet features subsurface bodies of liquid water at the end of the winter season. Using a model with basic firn hydrology, thermodynamics, and compaction in one dimension, we find that a combination of moderate to strong surface...
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ftunivutrecht:oai:dspace.library.uu.nl:1874/292367 2023-07-23T04:19:31+02:00 Explaining the presence of perennial liquid water bodies in the firn of the Greenland Ice Sheet Kuipers Munneke, P. Ligtenberg, S.R.M. van den Broeke, M.R. van Angelen, J.H. Forster, R.R. Marine and Atmospheric Research Sub Dynamics Meteorology 2014 image/pdf https://dspace.library.uu.nl/handle/1874/292367 en eng 0094-8276 https://dspace.library.uu.nl/handle/1874/292367 info:eu-repo/semantics/OpenAccess Article 2014 ftunivutrecht 2023-07-02T00:54:28Z Recent observations have shown that the firn layer on the Greenland Ice Sheet features subsurface bodies of liquid water at the end of the winter season. Using a model with basic firn hydrology, thermodynamics, and compaction in one dimension, we find that a combination of moderate to strong surfacemelt and a high annual accumulation rate is required to form such a perennial firn aquifer. The high accumulation rate ensures that there is pore space available to store water at a depth where it is protected from the winter cold. Low-accumulation sites cannot provide sufficiently deep pore space to store liquid water. However, for even higher accumulation rates, the total cold content of the winter accumulation becomes sufficient to refreeze the total amount of liquid water. As a consequence, wintertime or springtime observations of subsurface liquid water in these specific accumulation conditions cannot distinguish between a truly perennial firn aquifer and water layers that will ultimately refreeze completely. Article in Journal/Newspaper Greenland Ice Sheet Utrecht University Repository Greenland |
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Open Polar |
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Utrecht University Repository |
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ftunivutrecht |
language |
English |
description |
Recent observations have shown that the firn layer on the Greenland Ice Sheet features subsurface bodies of liquid water at the end of the winter season. Using a model with basic firn hydrology, thermodynamics, and compaction in one dimension, we find that a combination of moderate to strong surfacemelt and a high annual accumulation rate is required to form such a perennial firn aquifer. The high accumulation rate ensures that there is pore space available to store water at a depth where it is protected from the winter cold. Low-accumulation sites cannot provide sufficiently deep pore space to store liquid water. However, for even higher accumulation rates, the total cold content of the winter accumulation becomes sufficient to refreeze the total amount of liquid water. As a consequence, wintertime or springtime observations of subsurface liquid water in these specific accumulation conditions cannot distinguish between a truly perennial firn aquifer and water layers that will ultimately refreeze completely. |
author2 |
Marine and Atmospheric Research Sub Dynamics Meteorology |
format |
Article in Journal/Newspaper |
author |
Kuipers Munneke, P. Ligtenberg, S.R.M. van den Broeke, M.R. van Angelen, J.H. Forster, R.R. |
spellingShingle |
Kuipers Munneke, P. Ligtenberg, S.R.M. van den Broeke, M.R. van Angelen, J.H. Forster, R.R. Explaining the presence of perennial liquid water bodies in the firn of the Greenland Ice Sheet |
author_facet |
Kuipers Munneke, P. Ligtenberg, S.R.M. van den Broeke, M.R. van Angelen, J.H. Forster, R.R. |
author_sort |
Kuipers Munneke, P. |
title |
Explaining the presence of perennial liquid water bodies in the firn of the Greenland Ice Sheet |
title_short |
Explaining the presence of perennial liquid water bodies in the firn of the Greenland Ice Sheet |
title_full |
Explaining the presence of perennial liquid water bodies in the firn of the Greenland Ice Sheet |
title_fullStr |
Explaining the presence of perennial liquid water bodies in the firn of the Greenland Ice Sheet |
title_full_unstemmed |
Explaining the presence of perennial liquid water bodies in the firn of the Greenland Ice Sheet |
title_sort |
explaining the presence of perennial liquid water bodies in the firn of the greenland ice sheet |
publishDate |
2014 |
url |
https://dspace.library.uu.nl/handle/1874/292367 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Ice Sheet |
genre_facet |
Greenland Ice Sheet |
op_relation |
0094-8276 https://dspace.library.uu.nl/handle/1874/292367 |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1772182697396928512 |