Northern Hemisphere ice sheets and planetary waves: a strong feedback mechanism
We carried out a statistical analysis orihe relation between the net mass balance of high-latitude glaciers and 500 mb height deviations of the seasonal mean atmosphere. Mass-balance series of 23 glaciers and ice caps were used, ranging in length from 8 to`30 yr. Considering the sample as a whole, i...
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ftunivutrecht:oai:dspace.library.uu.nl:1874/22242 2023-07-23T04:19:50+02:00 Northern Hemisphere ice sheets and planetary waves: a strong feedback mechanism Lindeman, M. Oerlemans, J. 1987 image/pdf https://dspace.library.uu.nl/handle/1874/22242 en eng 0196-1748 https://dspace.library.uu.nl/handle/1874/22242 info:eu-repo/semantics/OpenAccess Natuur- en Sterrenkunde Glacier mass balance Vorticity Feedback Planetary waves Article 1987 ftunivutrecht 2023-07-01T23:20:32Z We carried out a statistical analysis orihe relation between the net mass balance of high-latitude glaciers and 500 mb height deviations of the seasonal mean atmosphere. Mass-balance series of 23 glaciers and ice caps were used, ranging in length from 8 to`30 yr. Considering the sample as a whole, it appeared that the only significant predictor for mass balance variations is- the summer anomaly of the 500 mb height. Except for a few individual glaciers, correlations with mean vorticity and meridional wind component turned out to be insignificant. To investigate,the potential feedback between ice-age ice sheets and planetary waves, we used a stationary two-layer atmospheric model to calculate the response to the CLIMAP (1976) ice-sheet topography for 18,000YBP. Combining the result with the statistical analysis reveals that the feedback is important: the planetary wave pattern forced by the ice sheets leads to deviations of the equilibrium-line altitude of about 500 in. Article in Journal/Newspaper Ice Sheet Utrecht University Repository |
institution |
Open Polar |
collection |
Utrecht University Repository |
op_collection_id |
ftunivutrecht |
language |
English |
topic |
Natuur- en Sterrenkunde Glacier mass balance Vorticity Feedback Planetary waves |
spellingShingle |
Natuur- en Sterrenkunde Glacier mass balance Vorticity Feedback Planetary waves Lindeman, M. Oerlemans, J. Northern Hemisphere ice sheets and planetary waves: a strong feedback mechanism |
topic_facet |
Natuur- en Sterrenkunde Glacier mass balance Vorticity Feedback Planetary waves |
description |
We carried out a statistical analysis orihe relation between the net mass balance of high-latitude glaciers and 500 mb height deviations of the seasonal mean atmosphere. Mass-balance series of 23 glaciers and ice caps were used, ranging in length from 8 to`30 yr. Considering the sample as a whole, it appeared that the only significant predictor for mass balance variations is- the summer anomaly of the 500 mb height. Except for a few individual glaciers, correlations with mean vorticity and meridional wind component turned out to be insignificant. To investigate,the potential feedback between ice-age ice sheets and planetary waves, we used a stationary two-layer atmospheric model to calculate the response to the CLIMAP (1976) ice-sheet topography for 18,000YBP. Combining the result with the statistical analysis reveals that the feedback is important: the planetary wave pattern forced by the ice sheets leads to deviations of the equilibrium-line altitude of about 500 in. |
format |
Article in Journal/Newspaper |
author |
Lindeman, M. Oerlemans, J. |
author_facet |
Lindeman, M. Oerlemans, J. |
author_sort |
Lindeman, M. |
title |
Northern Hemisphere ice sheets and planetary waves: a strong feedback mechanism |
title_short |
Northern Hemisphere ice sheets and planetary waves: a strong feedback mechanism |
title_full |
Northern Hemisphere ice sheets and planetary waves: a strong feedback mechanism |
title_fullStr |
Northern Hemisphere ice sheets and planetary waves: a strong feedback mechanism |
title_full_unstemmed |
Northern Hemisphere ice sheets and planetary waves: a strong feedback mechanism |
title_sort |
northern hemisphere ice sheets and planetary waves: a strong feedback mechanism |
publishDate |
1987 |
url |
https://dspace.library.uu.nl/handle/1874/22242 |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_relation |
0196-1748 https://dspace.library.uu.nl/handle/1874/22242 |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1772183276791791616 |