A High Arctic microclimatic hotspot assessment Cape Bounty, Nunavut
Ground surface and permafrost temperatures in the High Arctic have been considered homogeneous. However, due to differential snow cover, there is a substantial degree of heterogeneity present. The objectives of this thesis were to model the ground thermal regime at Cape Bounty, Nunavut, using the TT...
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Lethbridge, Alta. : Universtiy of Lethbridge, Department of Geography
2018
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ftunivlethb:oai:opus.uleth.ca:10133/5202 2023-05-15T14:56:19+02:00 A High Arctic microclimatic hotspot assessment Cape Bounty, Nunavut Garibaldi, Madeleine C. University of Lethbridge. Faculty of Arts and Science Bonnaventure, Philip 2018 application/pdf https://hdl.handle.net/10133/5202 en_US eng Lethbridge, Alta. : Universtiy of Lethbridge, Department of Geography Arts and Science Department of Geography Thesis (University of Lethbridge. Faculty of Arts and Science) https://hdl.handle.net/10133/5202 modelling TTOP permafrost climate change snow cover thermal heterogeneity Canada Northern -- Climate Climatic changes -- Research -- Nunavut -- Cape Bounty Permafrost -- Effect of global warming on -- Research -- Nunavut -- Cape Bounty Permafrost -- Thermal properties -- Research -- Nunavut -- Cape Bounty Dissertations Academic Thesis 2018 ftunivlethb 2021-06-27T07:19:56Z Ground surface and permafrost temperatures in the High Arctic have been considered homogeneous. However, due to differential snow cover, there is a substantial degree of heterogeneity present. The objectives of this thesis were to model the ground thermal regime at Cape Bounty, Nunavut, using the TTOP model, for current conditions and climate change scenarios. While air temperature was mostly uniform, ground surface temperatures ranged from about -3.8 °C to about -13.8 °C. The spatial models showed warmer ground surface temperatures in topographic hollows, where snow accumulates, and colder temperatures in areas of topographic prominence, where snow is scoured. Under climate change, the models predicted that areas with the coldest permafrost had the largest magnitude of warming, while areas of relatively warm permafrost became closer to 0 °C. The thermal heterogeneity may have implications for ground stability, hydrological connectivity, and microbial activity, which influence solute movement and mercury release. NSERC ArcticNet PCSP Thesis Arctic ArcticNet Climate change Global warming Nunavut permafrost University of Lethbridge Institutional Repository Arctic Canada Cape Bounty ENVELOPE(-109.542,-109.542,74.863,74.863) Nunavut |
institution |
Open Polar |
collection |
University of Lethbridge Institutional Repository |
op_collection_id |
ftunivlethb |
language |
English |
topic |
modelling TTOP permafrost climate change snow cover thermal heterogeneity Canada Northern -- Climate Climatic changes -- Research -- Nunavut -- Cape Bounty Permafrost -- Effect of global warming on -- Research -- Nunavut -- Cape Bounty Permafrost -- Thermal properties -- Research -- Nunavut -- Cape Bounty Dissertations Academic |
spellingShingle |
modelling TTOP permafrost climate change snow cover thermal heterogeneity Canada Northern -- Climate Climatic changes -- Research -- Nunavut -- Cape Bounty Permafrost -- Effect of global warming on -- Research -- Nunavut -- Cape Bounty Permafrost -- Thermal properties -- Research -- Nunavut -- Cape Bounty Dissertations Academic Garibaldi, Madeleine C. University of Lethbridge. Faculty of Arts and Science A High Arctic microclimatic hotspot assessment Cape Bounty, Nunavut |
topic_facet |
modelling TTOP permafrost climate change snow cover thermal heterogeneity Canada Northern -- Climate Climatic changes -- Research -- Nunavut -- Cape Bounty Permafrost -- Effect of global warming on -- Research -- Nunavut -- Cape Bounty Permafrost -- Thermal properties -- Research -- Nunavut -- Cape Bounty Dissertations Academic |
description |
Ground surface and permafrost temperatures in the High Arctic have been considered homogeneous. However, due to differential snow cover, there is a substantial degree of heterogeneity present. The objectives of this thesis were to model the ground thermal regime at Cape Bounty, Nunavut, using the TTOP model, for current conditions and climate change scenarios. While air temperature was mostly uniform, ground surface temperatures ranged from about -3.8 °C to about -13.8 °C. The spatial models showed warmer ground surface temperatures in topographic hollows, where snow accumulates, and colder temperatures in areas of topographic prominence, where snow is scoured. Under climate change, the models predicted that areas with the coldest permafrost had the largest magnitude of warming, while areas of relatively warm permafrost became closer to 0 °C. The thermal heterogeneity may have implications for ground stability, hydrological connectivity, and microbial activity, which influence solute movement and mercury release. NSERC ArcticNet PCSP |
author2 |
Bonnaventure, Philip |
format |
Thesis |
author |
Garibaldi, Madeleine C. University of Lethbridge. Faculty of Arts and Science |
author_facet |
Garibaldi, Madeleine C. University of Lethbridge. Faculty of Arts and Science |
author_sort |
Garibaldi, Madeleine C. |
title |
A High Arctic microclimatic hotspot assessment Cape Bounty, Nunavut |
title_short |
A High Arctic microclimatic hotspot assessment Cape Bounty, Nunavut |
title_full |
A High Arctic microclimatic hotspot assessment Cape Bounty, Nunavut |
title_fullStr |
A High Arctic microclimatic hotspot assessment Cape Bounty, Nunavut |
title_full_unstemmed |
A High Arctic microclimatic hotspot assessment Cape Bounty, Nunavut |
title_sort |
high arctic microclimatic hotspot assessment cape bounty, nunavut |
publisher |
Lethbridge, Alta. : Universtiy of Lethbridge, Department of Geography |
publishDate |
2018 |
url |
https://hdl.handle.net/10133/5202 |
long_lat |
ENVELOPE(-109.542,-109.542,74.863,74.863) |
geographic |
Arctic Canada Cape Bounty Nunavut |
geographic_facet |
Arctic Canada Cape Bounty Nunavut |
genre |
Arctic ArcticNet Climate change Global warming Nunavut permafrost |
genre_facet |
Arctic ArcticNet Climate change Global warming Nunavut permafrost |
op_relation |
Thesis (University of Lethbridge. Faculty of Arts and Science) https://hdl.handle.net/10133/5202 |
_version_ |
1766328325199888384 |