Permafrost Distribution Mapping And Temperature Modeling Along The Alaska Highway Corridor, Interior Alaska
Dissertation (Ph.D.) University of Alaska Fairbanks, 2011 An up-to-date permafrost distribution map is critical for making engineering decisions during the planning and design of any engineering project in Interior Alaska. I used a combination of empirical-statistical and remote sensing techniques t...
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ftunivalaska:oai:scholarworks.alaska.edu:11122/9106 2023-05-15T13:02:57+02:00 Permafrost Distribution Mapping And Temperature Modeling Along The Alaska Highway Corridor, Interior Alaska Panda, Santosh K. Prakash, Anupma 2011 http://hdl.handle.net/11122/9106 unknown http://hdl.handle.net/11122/9106 Department of Geology and Geophysics Geology Remote sensing Geographic information science and geodesy Dissertation phd 2011 ftunivalaska 2023-02-23T21:37:12Z Dissertation (Ph.D.) University of Alaska Fairbanks, 2011 An up-to-date permafrost distribution map is critical for making engineering decisions during the planning and design of any engineering project in Interior Alaska. I used a combination of empirical-statistical and remote sensing techniques to generate a high-resolution spatially continuous near-surface (< 1.6 m) permafrost map by exploiting the correlative relationships between permafrost and biophysical terrain parameters. A Binary Logistic Regression (BLR) model was used to establish the relationship between vegetation type, aspect-slope and permafrost presence. The logistic coefficients for each variable class obtained from the BLR model were supplied to respective variable classes mapped from remotely sensed data to estimate permafrost probability for every pixel. The BLR model predicts permafrost presence/absence at an accuracy of 88%. Near-surface permafrost occupies 37% of the total study area. A permafrost map based on the interpretation of airborne electromagnetic (EM) resistivity data shows 22.5 -- 43.5% of the total study area as underlain by permafrost. Permafrost distribution statistics from both the maps suggest near-surface permafrost distribution in the study area is sporadic (10 -- 50 % of the area underlain by permafrost). Changes in air temperature and/or winter snow depth are important factors responsible for permafrost aggradation or degradation. I evaluated the effects of past and recent (1941-2008) climate changes on permafrost and active-layer dynamics at selected locations using the Geophysical Institute Permafrost Laboratory model. Results revealed that active-layer thickness reached 0.58 and 1.0 m, and mean annual permafrost temperature increased by 1.6 and 1.7 �C during 1966-1994 at two sites in response to increased mean annual air temperature, mean summer air temperature and winter snow depth. The study found that active-layer thickness is not only a function of summer air temperature but also of mean annual air ... Doctoral or Postdoctoral Thesis Active layer thickness permafrost Alaska University of Alaska: ScholarWorks@UA Fairbanks |
institution |
Open Polar |
collection |
University of Alaska: ScholarWorks@UA |
op_collection_id |
ftunivalaska |
language |
unknown |
topic |
Geology Remote sensing Geographic information science and geodesy |
spellingShingle |
Geology Remote sensing Geographic information science and geodesy Panda, Santosh K. Permafrost Distribution Mapping And Temperature Modeling Along The Alaska Highway Corridor, Interior Alaska |
topic_facet |
Geology Remote sensing Geographic information science and geodesy |
description |
Dissertation (Ph.D.) University of Alaska Fairbanks, 2011 An up-to-date permafrost distribution map is critical for making engineering decisions during the planning and design of any engineering project in Interior Alaska. I used a combination of empirical-statistical and remote sensing techniques to generate a high-resolution spatially continuous near-surface (< 1.6 m) permafrost map by exploiting the correlative relationships between permafrost and biophysical terrain parameters. A Binary Logistic Regression (BLR) model was used to establish the relationship between vegetation type, aspect-slope and permafrost presence. The logistic coefficients for each variable class obtained from the BLR model were supplied to respective variable classes mapped from remotely sensed data to estimate permafrost probability for every pixel. The BLR model predicts permafrost presence/absence at an accuracy of 88%. Near-surface permafrost occupies 37% of the total study area. A permafrost map based on the interpretation of airborne electromagnetic (EM) resistivity data shows 22.5 -- 43.5% of the total study area as underlain by permafrost. Permafrost distribution statistics from both the maps suggest near-surface permafrost distribution in the study area is sporadic (10 -- 50 % of the area underlain by permafrost). Changes in air temperature and/or winter snow depth are important factors responsible for permafrost aggradation or degradation. I evaluated the effects of past and recent (1941-2008) climate changes on permafrost and active-layer dynamics at selected locations using the Geophysical Institute Permafrost Laboratory model. Results revealed that active-layer thickness reached 0.58 and 1.0 m, and mean annual permafrost temperature increased by 1.6 and 1.7 �C during 1966-1994 at two sites in response to increased mean annual air temperature, mean summer air temperature and winter snow depth. The study found that active-layer thickness is not only a function of summer air temperature but also of mean annual air ... |
author2 |
Prakash, Anupma |
format |
Doctoral or Postdoctoral Thesis |
author |
Panda, Santosh K. |
author_facet |
Panda, Santosh K. |
author_sort |
Panda, Santosh K. |
title |
Permafrost Distribution Mapping And Temperature Modeling Along The Alaska Highway Corridor, Interior Alaska |
title_short |
Permafrost Distribution Mapping And Temperature Modeling Along The Alaska Highway Corridor, Interior Alaska |
title_full |
Permafrost Distribution Mapping And Temperature Modeling Along The Alaska Highway Corridor, Interior Alaska |
title_fullStr |
Permafrost Distribution Mapping And Temperature Modeling Along The Alaska Highway Corridor, Interior Alaska |
title_full_unstemmed |
Permafrost Distribution Mapping And Temperature Modeling Along The Alaska Highway Corridor, Interior Alaska |
title_sort |
permafrost distribution mapping and temperature modeling along the alaska highway corridor, interior alaska |
publishDate |
2011 |
url |
http://hdl.handle.net/11122/9106 |
geographic |
Fairbanks |
geographic_facet |
Fairbanks |
genre |
Active layer thickness permafrost Alaska |
genre_facet |
Active layer thickness permafrost Alaska |
op_relation |
http://hdl.handle.net/11122/9106 Department of Geology and Geophysics |
_version_ |
1766324936666775552 |