Self-consistent modeling of ice-sheet evolution and paleoclimate
Thesis (Ph.D.)--University of Washington, 2012 A self-consistent approach has been developed to determine past climate histories while simultaneously determining the past ice-sheet evolution. We recognize that multiple physical processes are affected by the same climate history and ice-sheet evoluti...
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ftunivwashington:oai:digital.lib.washington.edu:1773/20276 2023-05-15T13:34:00+02:00 Self-consistent modeling of ice-sheet evolution and paleoclimate Lundin, Jessica Waddington, Edwin D 2012 application/pdf http://hdl.handle.net/1773/20276 en_US eng Lundin_washington_0250E_10164.pdf http://hdl.handle.net/1773/20276 Copyright is held by the individual authors. Antarctica Glaciology Greenland Ice sheets Geophysics Earth and space sciences Thesis 2012 ftunivwashington 2023-03-12T18:49:49Z Thesis (Ph.D.)--University of Washington, 2012 A self-consistent approach has been developed to determine past climate histories while simultaneously determining the past ice-sheet evolution. We recognize that multiple physical processes are affected by the same climate history and ice-sheet evolution. By combining several processes into one self-consistent model based on physics of ice-sheet flow, heat flow, grain growth, and firn compaction, I can infer the climate history (accumulation rate and delta-age) and ice-sheet evolution (thickness and divide position), that match data sets from ice cores and ice-penetrating radar layers. Ice-sheet behavior has not previously been modeled to enforce self consistency. The self-consistent approach consists of modules, or subroutines, representing physical processes. I have developed forward models to simulate firn densification, grain growth, heat transfer, and ice flow, and inverse models to infer histories including the spatial pattern of accumulation, and the depth-age relationship for ice cores and radar layers. While individual modules can be replaced with modules based on a variety of physical approximations, I provide here proof of the concept that multiple data sets and multiple processes can be combined to provide improved estimates of ice-sheet histories that cannot be directly measured. This new approach provides a way to improve ice-core chronologies from Greenland and Antarctica, and to infer self-consistent histories of climate and ice-sheet evolution at those locations. Thesis Antarc* Antarctica Greenland ice core Ice Sheet University of Washington, Seattle: ResearchWorks Greenland |
institution |
Open Polar |
collection |
University of Washington, Seattle: ResearchWorks |
op_collection_id |
ftunivwashington |
language |
English |
topic |
Antarctica Glaciology Greenland Ice sheets Geophysics Earth and space sciences |
spellingShingle |
Antarctica Glaciology Greenland Ice sheets Geophysics Earth and space sciences Lundin, Jessica Self-consistent modeling of ice-sheet evolution and paleoclimate |
topic_facet |
Antarctica Glaciology Greenland Ice sheets Geophysics Earth and space sciences |
description |
Thesis (Ph.D.)--University of Washington, 2012 A self-consistent approach has been developed to determine past climate histories while simultaneously determining the past ice-sheet evolution. We recognize that multiple physical processes are affected by the same climate history and ice-sheet evolution. By combining several processes into one self-consistent model based on physics of ice-sheet flow, heat flow, grain growth, and firn compaction, I can infer the climate history (accumulation rate and delta-age) and ice-sheet evolution (thickness and divide position), that match data sets from ice cores and ice-penetrating radar layers. Ice-sheet behavior has not previously been modeled to enforce self consistency. The self-consistent approach consists of modules, or subroutines, representing physical processes. I have developed forward models to simulate firn densification, grain growth, heat transfer, and ice flow, and inverse models to infer histories including the spatial pattern of accumulation, and the depth-age relationship for ice cores and radar layers. While individual modules can be replaced with modules based on a variety of physical approximations, I provide here proof of the concept that multiple data sets and multiple processes can be combined to provide improved estimates of ice-sheet histories that cannot be directly measured. This new approach provides a way to improve ice-core chronologies from Greenland and Antarctica, and to infer self-consistent histories of climate and ice-sheet evolution at those locations. |
author2 |
Waddington, Edwin D |
format |
Thesis |
author |
Lundin, Jessica |
author_facet |
Lundin, Jessica |
author_sort |
Lundin, Jessica |
title |
Self-consistent modeling of ice-sheet evolution and paleoclimate |
title_short |
Self-consistent modeling of ice-sheet evolution and paleoclimate |
title_full |
Self-consistent modeling of ice-sheet evolution and paleoclimate |
title_fullStr |
Self-consistent modeling of ice-sheet evolution and paleoclimate |
title_full_unstemmed |
Self-consistent modeling of ice-sheet evolution and paleoclimate |
title_sort |
self-consistent modeling of ice-sheet evolution and paleoclimate |
publishDate |
2012 |
url |
http://hdl.handle.net/1773/20276 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Antarc* Antarctica Greenland ice core Ice Sheet |
genre_facet |
Antarc* Antarctica Greenland ice core Ice Sheet |
op_relation |
Lundin_washington_0250E_10164.pdf http://hdl.handle.net/1773/20276 |
op_rights |
Copyright is held by the individual authors. |
_version_ |
1766047775485591552 |