Can Milankovitch orbital variations initiate the growth of ice sheets in a general circulation model?
The possibility of initiating the growth of ice sheets by solar insolation variations is examined. The study is conducted using a climate model with three different orbital configurations corresponding to 116,000 and 106,000 yr before the present and a modified insolation field with greater reductio...
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ftnasantrs:oai:casi.ntrs.nasa.gov:19900024562 2023-05-15T16:40:20+02:00 Can Milankovitch orbital variations initiate the growth of ice sheets in a general circulation model? Rind, D. Peteet, D. Kukla, G. Unclassified, Unlimited, Publicly available Sep 20, 1989 http://ntrs.nasa.gov/search.jsp?R=19900024562 unknown http://ntrs.nasa.gov/search.jsp?R=19900024562 Accession ID: 90A11617 Copyright Other Sources 47 Journal of Geophysical Research; 94; 12851-12 1989 ftnasantrs 2012-02-15T18:22:24Z The possibility of initiating the growth of ice sheets by solar insolation variations is examined. The study is conducted using a climate model with three different orbital configurations corresponding to 116,000 and 106,000 yr before the present and a modified insolation field with greater reductions in summer insolation at high northern latitudes. Despite the reduced summer and fall insolation, the model fails to maintain snow cover through the summer at locations of suspected ice sheet initiation. The results suggest that there is a discrepancy between the model's response to Milankovitch perturbations and the geophysical evidence of ice sheet initiation. If the model results are correct, the growth of ice shown by geophysical evidence would have occurred in an extremely ablative environment, demanding a complicated strategy. Other/Unknown Material Ice Sheet NASA Technical Reports Server (NTRS) |
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NASA Technical Reports Server (NTRS) |
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47 Rind, D. Peteet, D. Kukla, G. Can Milankovitch orbital variations initiate the growth of ice sheets in a general circulation model? |
topic_facet |
47 |
description |
The possibility of initiating the growth of ice sheets by solar insolation variations is examined. The study is conducted using a climate model with three different orbital configurations corresponding to 116,000 and 106,000 yr before the present and a modified insolation field with greater reductions in summer insolation at high northern latitudes. Despite the reduced summer and fall insolation, the model fails to maintain snow cover through the summer at locations of suspected ice sheet initiation. The results suggest that there is a discrepancy between the model's response to Milankovitch perturbations and the geophysical evidence of ice sheet initiation. If the model results are correct, the growth of ice shown by geophysical evidence would have occurred in an extremely ablative environment, demanding a complicated strategy. |
format |
Other/Unknown Material |
author |
Rind, D. Peteet, D. Kukla, G. |
author_facet |
Rind, D. Peteet, D. Kukla, G. |
author_sort |
Rind, D. |
title |
Can Milankovitch orbital variations initiate the growth of ice sheets in a general circulation model? |
title_short |
Can Milankovitch orbital variations initiate the growth of ice sheets in a general circulation model? |
title_full |
Can Milankovitch orbital variations initiate the growth of ice sheets in a general circulation model? |
title_fullStr |
Can Milankovitch orbital variations initiate the growth of ice sheets in a general circulation model? |
title_full_unstemmed |
Can Milankovitch orbital variations initiate the growth of ice sheets in a general circulation model? |
title_sort |
can milankovitch orbital variations initiate the growth of ice sheets in a general circulation model? |
publishDate |
1989 |
url |
http://ntrs.nasa.gov/search.jsp?R=19900024562 |
op_coverage |
Unclassified, Unlimited, Publicly available |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_source |
Other Sources |
op_relation |
http://ntrs.nasa.gov/search.jsp?R=19900024562 Accession ID: 90A11617 |
op_rights |
Copyright |
_version_ |
1766030716513026048 |