Meltwater circulation and permeability of Arctic summer ice derived from hydrological field experiments
ABSTRACT. Permeability and meltwater flow have been studied in sea ice in the Siberian and central Arctic during the summers of 1995 and 1996. A bail-test technique has been adapted to allow for measurements of in situ permeability, found to range between 10^11 and 10^8 m2. Permeability varied by ab...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.510.4943 2023-05-15T14:55:02+02:00 Meltwater circulation and permeability of Arctic summer ice derived from hydrological field experiments Johannes Freitag Hajo Eicken The Pennsylvania State University CiteSeerX Archives 2003 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.510.4943 http://www2.gi.alaska.edu/~eicken/he_publ/03FE.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.510.4943 http://www2.gi.alaska.edu/~eicken/he_publ/03FE.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www2.gi.alaska.edu/~eicken/he_publ/03FE.pdf text 2003 ftciteseerx 2016-01-08T09:37:21Z ABSTRACT. Permeability and meltwater flow have been studied in sea ice in the Siberian and central Arctic during the summers of 1995 and 1996. A bail-test technique has been adapted to allow for measurements of in situ permeability, found to range between 10^11 and 10^8 m2. Permeability varied by about a factor of 2 between 1995 (above-normalmelt rates) and1996 (below-normalmelt rates). Release of fluorescent tra-cers (fluorescein, rhodamine) furthermore allowed the derivation of flow velocities and assessment of the relevant driving forces. Hydraulic gradients in rough ice andwind stress in ponded ice were found to be particularly important, driving meltwater over distances of several meters per day.The mid- to late-summer ice was found to be permeable enough to completely divert meltwater from the surface into the ice interior. It is shown, however, that lower permeabilities of the upper ice layers as well as refreezing of meltwater, par-ticularly during the early melt season, foster the development of surface melt ponds. Text Arctic Sea ice Unknown Arctic |
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ftciteseerx |
language |
English |
description |
ABSTRACT. Permeability and meltwater flow have been studied in sea ice in the Siberian and central Arctic during the summers of 1995 and 1996. A bail-test technique has been adapted to allow for measurements of in situ permeability, found to range between 10^11 and 10^8 m2. Permeability varied by about a factor of 2 between 1995 (above-normalmelt rates) and1996 (below-normalmelt rates). Release of fluorescent tra-cers (fluorescein, rhodamine) furthermore allowed the derivation of flow velocities and assessment of the relevant driving forces. Hydraulic gradients in rough ice andwind stress in ponded ice were found to be particularly important, driving meltwater over distances of several meters per day.The mid- to late-summer ice was found to be permeable enough to completely divert meltwater from the surface into the ice interior. It is shown, however, that lower permeabilities of the upper ice layers as well as refreezing of meltwater, par-ticularly during the early melt season, foster the development of surface melt ponds. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Johannes Freitag Hajo Eicken |
spellingShingle |
Johannes Freitag Hajo Eicken Meltwater circulation and permeability of Arctic summer ice derived from hydrological field experiments |
author_facet |
Johannes Freitag Hajo Eicken |
author_sort |
Johannes Freitag |
title |
Meltwater circulation and permeability of Arctic summer ice derived from hydrological field experiments |
title_short |
Meltwater circulation and permeability of Arctic summer ice derived from hydrological field experiments |
title_full |
Meltwater circulation and permeability of Arctic summer ice derived from hydrological field experiments |
title_fullStr |
Meltwater circulation and permeability of Arctic summer ice derived from hydrological field experiments |
title_full_unstemmed |
Meltwater circulation and permeability of Arctic summer ice derived from hydrological field experiments |
title_sort |
meltwater circulation and permeability of arctic summer ice derived from hydrological field experiments |
publishDate |
2003 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.510.4943 http://www2.gi.alaska.edu/~eicken/he_publ/03FE.pdf |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Sea ice |
genre_facet |
Arctic Sea ice |
op_source |
http://www2.gi.alaska.edu/~eicken/he_publ/03FE.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.510.4943 http://www2.gi.alaska.edu/~eicken/he_publ/03FE.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766326821099405312 |