Experimental investigation of ice-covered deltas : the effects of ice cover on delta morphology
Deltas are dynamic systems that can provide important information on past climate conditions (Helland-Hansen and Martinsen, 1996; Hill et al., 2001; Kim et al., 2006; Bianchi and Allison, 2009). Arctic deltas have the potential to preserve significant information about climate change in one of the m...
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ftunivtexas:oai:repositories.lib.utexas.edu:2152/44404 2023-05-15T14:50:51+02:00 Experimental investigation of ice-covered deltas : the effects of ice cover on delta morphology Lim, Ye Jin Kim, Wonsuck Levy, Joseph S Mohrig, David Johnson, Joel 2016-05 application/pdf http://hdl.handle.net/2152/44404 https://doi.org/10.15781/T2FT8DN78 en eng doi:10.15781/T2FT8DN78 http://hdl.handle.net/2152/44404 Arctic deltas Delta morphology Deposition Climate signatures Thesis text 2016 ftunivtexas https://doi.org/10.15781/T2FT8DN78 2020-12-23T22:04:31Z Deltas are dynamic systems that can provide important information on past climate conditions (Helland-Hansen and Martinsen, 1996; Hill et al., 2001; Kim et al., 2006; Bianchi and Allison, 2009). Arctic deltas have the potential to preserve significant information about climate change in one of the most temperature-sensitive regions of the Earth (Walker 1998; Walker and Hudson, 2003; Bianchi and Allison, 2009; Stocker, 2014). Here we present experimental results assessing the effects of ice cover on delta morphodynamics and depositional processes to identify signatures of ice cover presence during deposition. Ice cover drives spatially varying sediment transport on the subaqueous delta clinoform through sub-ice channels, which then leads to the development of (1) multiple extended delta lobes built by elongated, subaqueous sediment wedges and (2) highly variable bathymetry with increasing topographic roughness up to a water depth above which bottom-fast ice cover exists. These seascape features are unique to ice-covered deltas, and can therefore serve as diagnostic markers of past climate conditions and indicators of climate change captured on vulnerable Arctic coasts. Geological Sciences Thesis Arctic Climate change The University of Texas at Austin: Texas ScholarWorks Arctic Hudson Bianchi ENVELOPE(-55.500,-55.500,-63.350,-63.350) Helland ENVELOPE(6.470,6.470,62.608,62.608) |
institution |
Open Polar |
collection |
The University of Texas at Austin: Texas ScholarWorks |
op_collection_id |
ftunivtexas |
language |
English |
topic |
Arctic deltas Delta morphology Deposition Climate signatures |
spellingShingle |
Arctic deltas Delta morphology Deposition Climate signatures Lim, Ye Jin Experimental investigation of ice-covered deltas : the effects of ice cover on delta morphology |
topic_facet |
Arctic deltas Delta morphology Deposition Climate signatures |
description |
Deltas are dynamic systems that can provide important information on past climate conditions (Helland-Hansen and Martinsen, 1996; Hill et al., 2001; Kim et al., 2006; Bianchi and Allison, 2009). Arctic deltas have the potential to preserve significant information about climate change in one of the most temperature-sensitive regions of the Earth (Walker 1998; Walker and Hudson, 2003; Bianchi and Allison, 2009; Stocker, 2014). Here we present experimental results assessing the effects of ice cover on delta morphodynamics and depositional processes to identify signatures of ice cover presence during deposition. Ice cover drives spatially varying sediment transport on the subaqueous delta clinoform through sub-ice channels, which then leads to the development of (1) multiple extended delta lobes built by elongated, subaqueous sediment wedges and (2) highly variable bathymetry with increasing topographic roughness up to a water depth above which bottom-fast ice cover exists. These seascape features are unique to ice-covered deltas, and can therefore serve as diagnostic markers of past climate conditions and indicators of climate change captured on vulnerable Arctic coasts. Geological Sciences |
author2 |
Kim, Wonsuck Levy, Joseph S Mohrig, David Johnson, Joel |
format |
Thesis |
author |
Lim, Ye Jin |
author_facet |
Lim, Ye Jin |
author_sort |
Lim, Ye Jin |
title |
Experimental investigation of ice-covered deltas : the effects of ice cover on delta morphology |
title_short |
Experimental investigation of ice-covered deltas : the effects of ice cover on delta morphology |
title_full |
Experimental investigation of ice-covered deltas : the effects of ice cover on delta morphology |
title_fullStr |
Experimental investigation of ice-covered deltas : the effects of ice cover on delta morphology |
title_full_unstemmed |
Experimental investigation of ice-covered deltas : the effects of ice cover on delta morphology |
title_sort |
experimental investigation of ice-covered deltas : the effects of ice cover on delta morphology |
publishDate |
2016 |
url |
http://hdl.handle.net/2152/44404 https://doi.org/10.15781/T2FT8DN78 |
long_lat |
ENVELOPE(-55.500,-55.500,-63.350,-63.350) ENVELOPE(6.470,6.470,62.608,62.608) |
geographic |
Arctic Hudson Bianchi Helland |
geographic_facet |
Arctic Hudson Bianchi Helland |
genre |
Arctic Climate change |
genre_facet |
Arctic Climate change |
op_relation |
doi:10.15781/T2FT8DN78 http://hdl.handle.net/2152/44404 |
op_doi |
https://doi.org/10.15781/T2FT8DN78 |
_version_ |
1766321921483341824 |