Variations of ablation, albedo and energy balance at the margin of the Greenland ice sheet, Kronprins Christian Land, eastern north Greenland
Abstract A meteorological and glaciological experiment was carried out in July 1993 at the margin of the Greenland ice sheet in Kronprins Christian Land, eastern north Greenland. Within a small area (about 100 m 2 ) daily measurements were made on ten ablation stakes fixed in “light” and “dark” ice...
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Language: | English |
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Cambridge University Press (CUP)
1995
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Online Access: | http://dx.doi.org/10.1017/s002214300001786x https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S002214300001786X |
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crcambridgeupr:10.1017/s002214300001786x 2024-03-03T08:44:36+00:00 Variations of ablation, albedo and energy balance at the margin of the Greenland ice sheet, Kronprins Christian Land, eastern north Greenland Konzelmann, Thomas Braithwaite, Roger J. 1995 http://dx.doi.org/10.1017/s002214300001786x https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S002214300001786X en eng Cambridge University Press (CUP) Journal of Glaciology volume 41, issue 137, page 174-182 ISSN 0022-1430 1727-5652 Earth-Surface Processes journal-article 1995 crcambridgeupr https://doi.org/10.1017/s002214300001786x 2024-02-08T08:41:37Z Abstract A meteorological and glaciological experiment was carried out in July 1993 at the margin of the Greenland ice sheet in Kronprins Christian Land, eastern north Greenland. Within a small area (about 100 m 2 ) daily measurements were made on ten ablation stakes fixed in “light” and “dark” ice and were compared to each other. Simultaneously, the components of the energy balance, including net radiation, sensible-heat flux, latent-heat flux and conductive-heat flux in the ice were determined. Global radiation, longwave incoming radiation and albedo were measured, and longwave outgoing radiation was calculated by assuming that the glacier surface was melting. Sensible-and latent-heat fluxes were calculated from air temperature, humidity and wind speed. Conductive-heat flux in the ice was estimated by temperature-profile measurements in the uppermost ice layer. Net radiation is the major source of ablation energy, and turbulent fluxes are smaller energy sources by about three times, while heat flux into the ice is a substantial heat sink, reducing energy available for ice melt. Albedo varies from 0.42 to 0.56 within the experimental site and causes relatively large differences in ablation at stakes close to each other. Small-scale albedo variations should therefore be carefully sampled for large-scale energy-balance calculations. Article in Journal/Newspaper glacier Greenland Ice Sheet Journal of Glaciology Kronprins Christian land North Greenland Cambridge University Press Greenland Kronprins Christian Land ENVELOPE(-22.000,-22.000,80.500,80.500) Journal of Glaciology 41 137 174 182 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Earth-Surface Processes |
spellingShingle |
Earth-Surface Processes Konzelmann, Thomas Braithwaite, Roger J. Variations of ablation, albedo and energy balance at the margin of the Greenland ice sheet, Kronprins Christian Land, eastern north Greenland |
topic_facet |
Earth-Surface Processes |
description |
Abstract A meteorological and glaciological experiment was carried out in July 1993 at the margin of the Greenland ice sheet in Kronprins Christian Land, eastern north Greenland. Within a small area (about 100 m 2 ) daily measurements were made on ten ablation stakes fixed in “light” and “dark” ice and were compared to each other. Simultaneously, the components of the energy balance, including net radiation, sensible-heat flux, latent-heat flux and conductive-heat flux in the ice were determined. Global radiation, longwave incoming radiation and albedo were measured, and longwave outgoing radiation was calculated by assuming that the glacier surface was melting. Sensible-and latent-heat fluxes were calculated from air temperature, humidity and wind speed. Conductive-heat flux in the ice was estimated by temperature-profile measurements in the uppermost ice layer. Net radiation is the major source of ablation energy, and turbulent fluxes are smaller energy sources by about three times, while heat flux into the ice is a substantial heat sink, reducing energy available for ice melt. Albedo varies from 0.42 to 0.56 within the experimental site and causes relatively large differences in ablation at stakes close to each other. Small-scale albedo variations should therefore be carefully sampled for large-scale energy-balance calculations. |
format |
Article in Journal/Newspaper |
author |
Konzelmann, Thomas Braithwaite, Roger J. |
author_facet |
Konzelmann, Thomas Braithwaite, Roger J. |
author_sort |
Konzelmann, Thomas |
title |
Variations of ablation, albedo and energy balance at the margin of the Greenland ice sheet, Kronprins Christian Land, eastern north Greenland |
title_short |
Variations of ablation, albedo and energy balance at the margin of the Greenland ice sheet, Kronprins Christian Land, eastern north Greenland |
title_full |
Variations of ablation, albedo and energy balance at the margin of the Greenland ice sheet, Kronprins Christian Land, eastern north Greenland |
title_fullStr |
Variations of ablation, albedo and energy balance at the margin of the Greenland ice sheet, Kronprins Christian Land, eastern north Greenland |
title_full_unstemmed |
Variations of ablation, albedo and energy balance at the margin of the Greenland ice sheet, Kronprins Christian Land, eastern north Greenland |
title_sort |
variations of ablation, albedo and energy balance at the margin of the greenland ice sheet, kronprins christian land, eastern north greenland |
publisher |
Cambridge University Press (CUP) |
publishDate |
1995 |
url |
http://dx.doi.org/10.1017/s002214300001786x https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S002214300001786X |
long_lat |
ENVELOPE(-22.000,-22.000,80.500,80.500) |
geographic |
Greenland Kronprins Christian Land |
geographic_facet |
Greenland Kronprins Christian Land |
genre |
glacier Greenland Ice Sheet Journal of Glaciology Kronprins Christian land North Greenland |
genre_facet |
glacier Greenland Ice Sheet Journal of Glaciology Kronprins Christian land North Greenland |
op_source |
Journal of Glaciology volume 41, issue 137, page 174-182 ISSN 0022-1430 1727-5652 |
op_doi |
https://doi.org/10.1017/s002214300001786x |
container_title |
Journal of Glaciology |
container_volume |
41 |
container_issue |
137 |
container_start_page |
174 |
op_container_end_page |
182 |
_version_ |
1792500095970705408 |