Modelling of pleistocene European ice sheets: the effect of upslope precipitation
Results are presented from a numerical model of the Scandinavian Ice Sheet, in which the effect of upslope precipitation is included explicitly. The model is forced by changing the environmental conditions, formulated in terms of the annual mean temperature and the annual temperature range. These fa...
Main Authors: | , |
---|---|
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
1983
|
Subjects: | |
Online Access: | https://dspace.library.uu.nl/handle/1874/22205 |
id |
ftunivutrecht:oai:dspace.library.uu.nl:1874/22205 |
---|---|
record_format |
openpolar |
spelling |
ftunivutrecht:oai:dspace.library.uu.nl:1874/22205 2023-07-23T04:19:48+02:00 Modelling of pleistocene European ice sheets: the effect of upslope precipitation Sanberg, J.A.M. Oerlemans, J. 1983 image/pdf https://dspace.library.uu.nl/handle/1874/22205 en eng 0016-7746 https://dspace.library.uu.nl/handle/1874/22205 info:eu-repo/semantics/OpenAccess Natuur- en Sterrenkunde Article 1983 ftunivutrecht 2023-07-01T23:20:27Z Results are presented from a numerical model of the Scandinavian Ice Sheet, in which the effect of upslope precipitation is included explicitly. The model is forced by changing the environmental conditions, formulated in terms of the annual mean temperature and the annual temperature range. These factors determine snowfall and melting rates, in dependence of the local conditions. It appears that orographically induced precipitation, which causes zones of high precipitation to shift with the ice-sheet edge, and ocean temperature are very important with regard to the growth rate of the Scandinavian Ice Sheet. In particular, upslope snowfall causes the ice sheet to advance westwards into the North Sea region much more easily. Stable equilibrium states of the ice sheet were calculated for various climatic conditions. A large ice sheet is only possible in cold conditions, whereas under very warm conditions no ice cover can be maintained. However, in between is a range of temperatures (2.5 to 6 K lower than present temperature) for which three stable equilibrium states exist: (i) no ice sheet, (ii) small ice sheets in the Scandinavian mountains, and (iii) a large ice sheet. This indicates that the response of the Scandinavian Ice Sheet to time-dependent forcing will be very complex. 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 |
spellingShingle |
Natuur- en Sterrenkunde Sanberg, J.A.M. Oerlemans, J. Modelling of pleistocene European ice sheets: the effect of upslope precipitation |
topic_facet |
Natuur- en Sterrenkunde |
description |
Results are presented from a numerical model of the Scandinavian Ice Sheet, in which the effect of upslope precipitation is included explicitly. The model is forced by changing the environmental conditions, formulated in terms of the annual mean temperature and the annual temperature range. These factors determine snowfall and melting rates, in dependence of the local conditions. It appears that orographically induced precipitation, which causes zones of high precipitation to shift with the ice-sheet edge, and ocean temperature are very important with regard to the growth rate of the Scandinavian Ice Sheet. In particular, upslope snowfall causes the ice sheet to advance westwards into the North Sea region much more easily. Stable equilibrium states of the ice sheet were calculated for various climatic conditions. A large ice sheet is only possible in cold conditions, whereas under very warm conditions no ice cover can be maintained. However, in between is a range of temperatures (2.5 to 6 K lower than present temperature) for which three stable equilibrium states exist: (i) no ice sheet, (ii) small ice sheets in the Scandinavian mountains, and (iii) a large ice sheet. This indicates that the response of the Scandinavian Ice Sheet to time-dependent forcing will be very complex. |
format |
Article in Journal/Newspaper |
author |
Sanberg, J.A.M. Oerlemans, J. |
author_facet |
Sanberg, J.A.M. Oerlemans, J. |
author_sort |
Sanberg, J.A.M. |
title |
Modelling of pleistocene European ice sheets: the effect of upslope precipitation |
title_short |
Modelling of pleistocene European ice sheets: the effect of upslope precipitation |
title_full |
Modelling of pleistocene European ice sheets: the effect of upslope precipitation |
title_fullStr |
Modelling of pleistocene European ice sheets: the effect of upslope precipitation |
title_full_unstemmed |
Modelling of pleistocene European ice sheets: the effect of upslope precipitation |
title_sort |
modelling of pleistocene european ice sheets: the effect of upslope precipitation |
publishDate |
1983 |
url |
https://dspace.library.uu.nl/handle/1874/22205 |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_relation |
0016-7746 https://dspace.library.uu.nl/handle/1874/22205 |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1772183204117086208 |