A technique for generating consistent ice sheet initial conditions for coupled ice sheet/climate models
Abstract. A transient technique for generating ice sheet preindustrial initial conditions for long-term coupled ice sheet/climate model simulations is developed and demonstrated over the Greenland ice sheet using the Community Earth System Model (CESM). End-member paleoclimate simulations of the las...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.1035.7205 2023-05-15T16:29:38+02:00 A technique for generating consistent ice sheet initial conditions for coupled ice sheet/climate models J G Fyke W J Sacks W H Lipscomb The Pennsylvania State University CiteSeerX Archives 2014 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1035.7205 http://www.geosci-model-dev.net/7/1183/2014/gmd-7-1183-2014.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1035.7205 http://www.geosci-model-dev.net/7/1183/2014/gmd-7-1183-2014.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.geosci-model-dev.net/7/1183/2014/gmd-7-1183-2014.pdf text 2014 ftciteseerx 2020-02-16T01:15:23Z Abstract. A transient technique for generating ice sheet preindustrial initial conditions for long-term coupled ice sheet/climate model simulations is developed and demonstrated over the Greenland ice sheet using the Community Earth System Model (CESM). End-member paleoclimate simulations of the last glacial maximum, mid-Holocene optimum and the preindustrial are combined using weighting provided by ice core data time series to derive continuous energy-balance-model-derived surface mass balance and surface temperature fields, which are subsequently used to force a long transient ice sheet model simulation of the last glacial cycle, ending at the preindustrial. The procedure accounts for the evolution of climate through the last glacial period and converges to a simulated preindustrial ice sheet that is geometrically and thermodynamically consistent with the preindustrial CESM state, yet contains a transient memory of past climate. The preindustrial state generated using this technique notably improves upon the standard equilibrium spinup technique, relative to observations and other model studies, although in the demonstration we present here, large biases remain due primarily to climate model forcing biases. Ultimately, the method we describe provides a clear template for generating initial conditions for ice sheets within a fully coupled climate model framework that allows for the effects of past climate history to be self-consistently included in long-term simulations of the fully coupled ice sheet/climate system. Text Greenland ice core Ice Sheet Unknown Greenland |
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ftciteseerx |
language |
English |
description |
Abstract. A transient technique for generating ice sheet preindustrial initial conditions for long-term coupled ice sheet/climate model simulations is developed and demonstrated over the Greenland ice sheet using the Community Earth System Model (CESM). End-member paleoclimate simulations of the last glacial maximum, mid-Holocene optimum and the preindustrial are combined using weighting provided by ice core data time series to derive continuous energy-balance-model-derived surface mass balance and surface temperature fields, which are subsequently used to force a long transient ice sheet model simulation of the last glacial cycle, ending at the preindustrial. The procedure accounts for the evolution of climate through the last glacial period and converges to a simulated preindustrial ice sheet that is geometrically and thermodynamically consistent with the preindustrial CESM state, yet contains a transient memory of past climate. The preindustrial state generated using this technique notably improves upon the standard equilibrium spinup technique, relative to observations and other model studies, although in the demonstration we present here, large biases remain due primarily to climate model forcing biases. Ultimately, the method we describe provides a clear template for generating initial conditions for ice sheets within a fully coupled climate model framework that allows for the effects of past climate history to be self-consistently included in long-term simulations of the fully coupled ice sheet/climate system. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
J G Fyke W J Sacks W H Lipscomb |
spellingShingle |
J G Fyke W J Sacks W H Lipscomb A technique for generating consistent ice sheet initial conditions for coupled ice sheet/climate models |
author_facet |
J G Fyke W J Sacks W H Lipscomb |
author_sort |
J G Fyke |
title |
A technique for generating consistent ice sheet initial conditions for coupled ice sheet/climate models |
title_short |
A technique for generating consistent ice sheet initial conditions for coupled ice sheet/climate models |
title_full |
A technique for generating consistent ice sheet initial conditions for coupled ice sheet/climate models |
title_fullStr |
A technique for generating consistent ice sheet initial conditions for coupled ice sheet/climate models |
title_full_unstemmed |
A technique for generating consistent ice sheet initial conditions for coupled ice sheet/climate models |
title_sort |
technique for generating consistent ice sheet initial conditions for coupled ice sheet/climate models |
publishDate |
2014 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1035.7205 http://www.geosci-model-dev.net/7/1183/2014/gmd-7-1183-2014.pdf |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland ice core Ice Sheet |
genre_facet |
Greenland ice core Ice Sheet |
op_source |
http://www.geosci-model-dev.net/7/1183/2014/gmd-7-1183-2014.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1035.7205 http://www.geosci-model-dev.net/7/1183/2014/gmd-7-1183-2014.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766019341556383744 |