Ice-rich permafrost thaw under sub-aquatic conditions
Degradation of sub-aquatic permafrost can release large quantities of methane into the atmosphere, impact offshore drilling activities, and affect coastal erosion. The degradation rate depends on the duration of inundation, warming rate, sediment characteristics, the coupling of the bottom to the at...
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ftawi:oai:epic.awi.de:45110 2023-05-15T13:09:05+02:00 Ice-rich permafrost thaw under sub-aquatic conditions Angelopoulos, Michael Overduin, Pier Paul Creighton, Andrea Lauren-Taylor Parsekian, Andrew D. Jones, Benjamin M. Grosse, Guido Arp, Christopher D. Lenz, Josefine Westermann, Sebastian 2017-02-09 https://epic.awi.de/id/eprint/45110/ https://hdl.handle.net/10013/epic.51296 unknown Angelopoulos, M. orcid:0000-0003-2574-5108 , Overduin, P. P. orcid:0000-0001-9849-4712 , Creighton, A. L. T. , Parsekian, A. D. , Jones, B. M. , Grosse, G. orcid:0000-0001-5895-2141 , Arp, C. D. , Lenz, J. orcid:0000-0002-4050-3169 and Westermann, S. (2017) Ice-rich permafrost thaw under sub-aquatic conditions , AK Permafrost 2017, Einsiedeln, Switzerland, 9 February 2017 - 11 February 2017 . hdl:10013/epic.51296 EPIC3AK Permafrost 2017, Einsiedeln, Switzerland, 2017-02-09-2017-02-11 Conference notRev 2017 ftawi 2021-12-24T15:43:09Z Degradation of sub-aquatic permafrost can release large quantities of methane into the atmosphere, impact offshore drilling activities, and affect coastal erosion. The degradation rate depends on the duration of inundation, warming rate, sediment characteristics, the coupling of the bottom to the atmosphere through bottom-fast ice, and brine injections into the sediment. The relative importance of these controls on the rate of sub-aquatic permafrost degradation, however, remains poorly understood. This poster presents a conceptual evaluation of sub-aquatic permafrost thaw mechanisms and an approach to their representation using one-dimensional modelling of heat and dissolved salt diffusion. We apply this model to permafrost degradation observed below Peatball Lake on the Alaska North Slope and compare modelling results to talik geometry information inferred from transient electromagnetic (TEM) soundings. Conference Object Alaska North Slope Ice north slope permafrost Alaska Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Talik ENVELOPE(146.601,146.601,59.667,59.667) |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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ftawi |
language |
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description |
Degradation of sub-aquatic permafrost can release large quantities of methane into the atmosphere, impact offshore drilling activities, and affect coastal erosion. The degradation rate depends on the duration of inundation, warming rate, sediment characteristics, the coupling of the bottom to the atmosphere through bottom-fast ice, and brine injections into the sediment. The relative importance of these controls on the rate of sub-aquatic permafrost degradation, however, remains poorly understood. This poster presents a conceptual evaluation of sub-aquatic permafrost thaw mechanisms and an approach to their representation using one-dimensional modelling of heat and dissolved salt diffusion. We apply this model to permafrost degradation observed below Peatball Lake on the Alaska North Slope and compare modelling results to talik geometry information inferred from transient electromagnetic (TEM) soundings. |
format |
Conference Object |
author |
Angelopoulos, Michael Overduin, Pier Paul Creighton, Andrea Lauren-Taylor Parsekian, Andrew D. Jones, Benjamin M. Grosse, Guido Arp, Christopher D. Lenz, Josefine Westermann, Sebastian |
spellingShingle |
Angelopoulos, Michael Overduin, Pier Paul Creighton, Andrea Lauren-Taylor Parsekian, Andrew D. Jones, Benjamin M. Grosse, Guido Arp, Christopher D. Lenz, Josefine Westermann, Sebastian Ice-rich permafrost thaw under sub-aquatic conditions |
author_facet |
Angelopoulos, Michael Overduin, Pier Paul Creighton, Andrea Lauren-Taylor Parsekian, Andrew D. Jones, Benjamin M. Grosse, Guido Arp, Christopher D. Lenz, Josefine Westermann, Sebastian |
author_sort |
Angelopoulos, Michael |
title |
Ice-rich permafrost thaw under sub-aquatic conditions |
title_short |
Ice-rich permafrost thaw under sub-aquatic conditions |
title_full |
Ice-rich permafrost thaw under sub-aquatic conditions |
title_fullStr |
Ice-rich permafrost thaw under sub-aquatic conditions |
title_full_unstemmed |
Ice-rich permafrost thaw under sub-aquatic conditions |
title_sort |
ice-rich permafrost thaw under sub-aquatic conditions |
publishDate |
2017 |
url |
https://epic.awi.de/id/eprint/45110/ https://hdl.handle.net/10013/epic.51296 |
long_lat |
ENVELOPE(146.601,146.601,59.667,59.667) |
geographic |
Talik |
geographic_facet |
Talik |
genre |
Alaska North Slope Ice north slope permafrost Alaska |
genre_facet |
Alaska North Slope Ice north slope permafrost Alaska |
op_source |
EPIC3AK Permafrost 2017, Einsiedeln, Switzerland, 2017-02-09-2017-02-11 |
op_relation |
Angelopoulos, M. orcid:0000-0003-2574-5108 , Overduin, P. P. orcid:0000-0001-9849-4712 , Creighton, A. L. T. , Parsekian, A. D. , Jones, B. M. , Grosse, G. orcid:0000-0001-5895-2141 , Arp, C. D. , Lenz, J. orcid:0000-0002-4050-3169 and Westermann, S. (2017) Ice-rich permafrost thaw under sub-aquatic conditions , AK Permafrost 2017, Einsiedeln, Switzerland, 9 February 2017 - 11 February 2017 . hdl:10013/epic.51296 |
_version_ |
1766161661703487488 |