Long-term records of Antarctic outlet glacier dynamics from historical data and novel remote sensing techniques
Quantifying how the cryosphere responds to various climate forcings is essential in accurate forecasting of ice sheet stability as well as sea level rise. In order to better predict how future climates will impact ice sheet and glacier mass balance, it is first necessary to understand whether the ob...
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2020
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Online Access: | https://hdl.handle.net/1808/34467 http://dissertations.umi.com/ku:17011 |
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ftunivkansas:oai:kuscholarworks.ku.edu:1808/34467 2024-02-11T09:57:21+01:00 Long-term records of Antarctic outlet glacier dynamics from historical data and novel remote sensing techniques Child, Sarah F Stearns, Leigh A Johnson, William C van der Veen, C. J. Olcott, Alison Tsoflias, George 2020 131 pages application/pdf https://hdl.handle.net/1808/34467 http://dissertations.umi.com/ku:17011 en eng University of Kansas http://dissertations.umi.com/ku:17011 https://hdl.handle.net/1808/34467 orcid:0000-0003-0677-2119 Copyright held by the author. openAccess Geology Antarctica Basal Crevasse Cryosphere Geophysics Glaciology Remote Sensing Dissertation 2020 ftunivkansas 2024-01-20T23:24:39Z Quantifying how the cryosphere responds to various climate forcings is essential in accurate forecasting of ice sheet stability as well as sea level rise. In order to better predict how future climates will impact ice sheet and glacier mass balance, it is first necessary to understand whether the observed changes in glaciers are from internal dynamics or responses to climate forcings. Equally necessary is the ability to identify if current glacier transformations are due to discrete events or ongoing phenomena. Unfortunately, most records for the world’s glaciers only extend for the last two decades, thus making long-term projections difficult. The overall aim of each project is to improve our understanding of cryosphere-climate relationships through long-term observational records and numerical modeling. The three projects are: (1) validating the use of historic aerial imagery with modern-day image processing techniques and manually extracted ground control from high-resolution imagery; (2) quantifying ~60-year surface elevation changes of outlet glaciers flowing through the Transantarctic Mountains from trimetrogon aerial photos; and (3) investigating basal crevasse initiation and determining if the formation of anomalously large crevasses can be proxies for historic Antarctic subglacial flooding events. The first project uses historic vertical aerial imagery and high-resolution optical satellite imagery; the second employs oblique aerial imagery from the 1960s and high-resolution optical satellite imagery; and the last project relies on a combination of airborne radar, in situ GPS, and optical satellite imagery. Innovative remote sensing techniques are used to acquire information that is either analyzed or integrated into numerical models (depending on the project) to draw conclusions about the stability of the ice sheet. These results further our understanding of the manner in which ice sheets and glaciers respond to changes in climate and will ultimately allow for more accurate constraints in modeling ... Doctoral or Postdoctoral Thesis Antarc* Antarctic Antarctica Ice Sheet The University of Kansas: KU ScholarWorks Antarctic Transantarctic Mountains |
institution |
Open Polar |
collection |
The University of Kansas: KU ScholarWorks |
op_collection_id |
ftunivkansas |
language |
English |
topic |
Geology Antarctica Basal Crevasse Cryosphere Geophysics Glaciology Remote Sensing |
spellingShingle |
Geology Antarctica Basal Crevasse Cryosphere Geophysics Glaciology Remote Sensing Child, Sarah F Long-term records of Antarctic outlet glacier dynamics from historical data and novel remote sensing techniques |
topic_facet |
Geology Antarctica Basal Crevasse Cryosphere Geophysics Glaciology Remote Sensing |
description |
Quantifying how the cryosphere responds to various climate forcings is essential in accurate forecasting of ice sheet stability as well as sea level rise. In order to better predict how future climates will impact ice sheet and glacier mass balance, it is first necessary to understand whether the observed changes in glaciers are from internal dynamics or responses to climate forcings. Equally necessary is the ability to identify if current glacier transformations are due to discrete events or ongoing phenomena. Unfortunately, most records for the world’s glaciers only extend for the last two decades, thus making long-term projections difficult. The overall aim of each project is to improve our understanding of cryosphere-climate relationships through long-term observational records and numerical modeling. The three projects are: (1) validating the use of historic aerial imagery with modern-day image processing techniques and manually extracted ground control from high-resolution imagery; (2) quantifying ~60-year surface elevation changes of outlet glaciers flowing through the Transantarctic Mountains from trimetrogon aerial photos; and (3) investigating basal crevasse initiation and determining if the formation of anomalously large crevasses can be proxies for historic Antarctic subglacial flooding events. The first project uses historic vertical aerial imagery and high-resolution optical satellite imagery; the second employs oblique aerial imagery from the 1960s and high-resolution optical satellite imagery; and the last project relies on a combination of airborne radar, in situ GPS, and optical satellite imagery. Innovative remote sensing techniques are used to acquire information that is either analyzed or integrated into numerical models (depending on the project) to draw conclusions about the stability of the ice sheet. These results further our understanding of the manner in which ice sheets and glaciers respond to changes in climate and will ultimately allow for more accurate constraints in modeling ... |
author2 |
Stearns, Leigh A Johnson, William C van der Veen, C. J. Olcott, Alison Tsoflias, George |
format |
Doctoral or Postdoctoral Thesis |
author |
Child, Sarah F |
author_facet |
Child, Sarah F |
author_sort |
Child, Sarah F |
title |
Long-term records of Antarctic outlet glacier dynamics from historical data and novel remote sensing techniques |
title_short |
Long-term records of Antarctic outlet glacier dynamics from historical data and novel remote sensing techniques |
title_full |
Long-term records of Antarctic outlet glacier dynamics from historical data and novel remote sensing techniques |
title_fullStr |
Long-term records of Antarctic outlet glacier dynamics from historical data and novel remote sensing techniques |
title_full_unstemmed |
Long-term records of Antarctic outlet glacier dynamics from historical data and novel remote sensing techniques |
title_sort |
long-term records of antarctic outlet glacier dynamics from historical data and novel remote sensing techniques |
publisher |
University of Kansas |
publishDate |
2020 |
url |
https://hdl.handle.net/1808/34467 http://dissertations.umi.com/ku:17011 |
geographic |
Antarctic Transantarctic Mountains |
geographic_facet |
Antarctic Transantarctic Mountains |
genre |
Antarc* Antarctic Antarctica Ice Sheet |
genre_facet |
Antarc* Antarctic Antarctica Ice Sheet |
op_relation |
http://dissertations.umi.com/ku:17011 https://hdl.handle.net/1808/34467 orcid:0000-0003-0677-2119 |
op_rights |
Copyright held by the author. openAccess |
_version_ |
1790609652295139328 |