Numerical modeling of lava flow cooling applied to the 1997 Okmok eruption: comparison with AVHRR thermal imagery
Thesis (M.S.) University of Alaska Fairbanks, 2002 Throughout February and March of 1997, Okmok volcano, in the eastern Aleutian Islands of Alaska, erupted a 6 km long lava flow of basaltic a'a within its caldera. A numerical model for lava flow cooling was developed, building upon existing lav...
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ftunivalaska:oai:scholarworks.alaska.edu:11122/6732 2023-05-15T18:48:43+02:00 Numerical modeling of lava flow cooling applied to the 1997 Okmok eruption: comparison with AVHRR thermal imagery Patrick, Matthew R. 2002-05 http://hdl.handle.net/11122/6732 en_US eng http://hdl.handle.net/11122/6732 Department of Geology and Geophysics Thesis 2002 ftunivalaska 2023-02-23T21:36:42Z Thesis (M.S.) University of Alaska Fairbanks, 2002 Throughout February and March of 1997, Okmok volcano, in the eastern Aleutian Islands of Alaska, erupted a 6 km long lava flow of basaltic a'a within its caldera. A numerical model for lava flow cooling was developed, building upon existing lava cooling models, and applied to the flow to better understand the nature of its cooling. The model predictions were then compared to Advanced Very High Resolution Radiometer (AVHRR) data collected over the flow. Daily data of rainfall and ambient temperature, as opposed to yearly averages used in comparable models, greatly increased the accuracy of the model. Furthermore, convective cooling of the lava surface was observed to be the dominant heat loss process during extended cooling indicating the convective heat transfer coefficient is a prime determinant of the accuracy of the model. The model's flexibility allows application to flows beside that of the 1997 Okmok eruption. Thesis Alaska Aleutian Islands University of Alaska: ScholarWorks@UA Fairbanks |
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Open Polar |
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University of Alaska: ScholarWorks@UA |
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ftunivalaska |
language |
English |
description |
Thesis (M.S.) University of Alaska Fairbanks, 2002 Throughout February and March of 1997, Okmok volcano, in the eastern Aleutian Islands of Alaska, erupted a 6 km long lava flow of basaltic a'a within its caldera. A numerical model for lava flow cooling was developed, building upon existing lava cooling models, and applied to the flow to better understand the nature of its cooling. The model predictions were then compared to Advanced Very High Resolution Radiometer (AVHRR) data collected over the flow. Daily data of rainfall and ambient temperature, as opposed to yearly averages used in comparable models, greatly increased the accuracy of the model. Furthermore, convective cooling of the lava surface was observed to be the dominant heat loss process during extended cooling indicating the convective heat transfer coefficient is a prime determinant of the accuracy of the model. The model's flexibility allows application to flows beside that of the 1997 Okmok eruption. |
format |
Thesis |
author |
Patrick, Matthew R. |
spellingShingle |
Patrick, Matthew R. Numerical modeling of lava flow cooling applied to the 1997 Okmok eruption: comparison with AVHRR thermal imagery |
author_facet |
Patrick, Matthew R. |
author_sort |
Patrick, Matthew R. |
title |
Numerical modeling of lava flow cooling applied to the 1997 Okmok eruption: comparison with AVHRR thermal imagery |
title_short |
Numerical modeling of lava flow cooling applied to the 1997 Okmok eruption: comparison with AVHRR thermal imagery |
title_full |
Numerical modeling of lava flow cooling applied to the 1997 Okmok eruption: comparison with AVHRR thermal imagery |
title_fullStr |
Numerical modeling of lava flow cooling applied to the 1997 Okmok eruption: comparison with AVHRR thermal imagery |
title_full_unstemmed |
Numerical modeling of lava flow cooling applied to the 1997 Okmok eruption: comparison with AVHRR thermal imagery |
title_sort |
numerical modeling of lava flow cooling applied to the 1997 okmok eruption: comparison with avhrr thermal imagery |
publishDate |
2002 |
url |
http://hdl.handle.net/11122/6732 |
geographic |
Fairbanks |
geographic_facet |
Fairbanks |
genre |
Alaska Aleutian Islands |
genre_facet |
Alaska Aleutian Islands |
op_relation |
http://hdl.handle.net/11122/6732 Department of Geology and Geophysics |
_version_ |
1766241963874451456 |