Threshold sensitivity of shallow Arctic lakes and sublake permafrost to changing winter climate
Interactions and feedbacks between abundant surface waters and permafrost fundamentally shape lowland Arctic landscapes. Sublake permafrost is maintained when the maximum ice thickness (MIT) exceeds lake depth and mean annual bed temperatures (MABTs) remain below freezing. However, declining MIT sin...
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Online Access: | https://epic.awi.de/id/eprint/41737/ https://doi.org/10.1002/2016GL068506 https://hdl.handle.net/10013/epic.48602 |
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ftawi:oai:epic.awi.de:41737 2023-05-15T14:27:06+02:00 Threshold sensitivity of shallow Arctic lakes and sublake permafrost to changing winter climate Arp, Christopher D. Jones, Benjamin M. Grosse, Guido Bondurant, Allen C. Romanovsky, Vladimir E. Hinkel, Kenneth M. Parsekian, Andrew D. 2016-06-16 https://epic.awi.de/id/eprint/41737/ https://doi.org/10.1002/2016GL068506 https://hdl.handle.net/10013/epic.48602 unknown Arp, C. D. , Jones, B. M. , Grosse, G. orcid:0000-0001-5895-2141 , Bondurant, A. C. , Romanovsky, V. E. , Hinkel, K. M. and Parsekian, A. D. (2016) Threshold sensitivity of shallow Arctic lakes and sublake permafrost to changing winter climate , Geophysical Research Letters, 43 (12), pp. 6358-6365 . doi:10.1002/2016GL068506 <https://doi.org/10.1002/2016GL068506> , hdl:10013/epic.48602 EPIC3Geophysical Research Letters, 43(12), pp. 6358-6365, ISSN: 00948276 Article isiRev 2016 ftawi https://doi.org/10.1002/2016GL068506 2021-12-24T15:41:54Z Interactions and feedbacks between abundant surface waters and permafrost fundamentally shape lowland Arctic landscapes. Sublake permafrost is maintained when the maximum ice thickness (MIT) exceeds lake depth and mean annual bed temperatures (MABTs) remain below freezing. However, declining MIT since the 1970s is likely causing talik development below shallow lakes. Here we show high-temperature sensitivity to winter ice growth at the water-sediment interface of shallow lakes based on year-round lake sensor data. Empirical model experiments suggest that shallow (1m depth) lakes have warmed substantially over the last 30years (2.4°C), withMABT above freezing5 of the last 7years.This is incomparison to slower ratesofwarming in deeper (3 m) lakes (0.9°C), with already well-developed taliks. Our findings indicate that permafrost below shallow lakes has already begun crossing a critical thawing threshold approximately 70 years prior to predicted terrestrial permafrost thaw in northern Alaska. Article in Journal/Newspaper Arctic Arctic Ice permafrost Alaska Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Arctic Talik ENVELOPE(146.601,146.601,59.667,59.667) Round Lake ENVELOPE(142.665,142.665,-66.993,-66.993) Geophysical Research Letters 43 12 6358 6365 |
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Open Polar |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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ftawi |
language |
unknown |
description |
Interactions and feedbacks between abundant surface waters and permafrost fundamentally shape lowland Arctic landscapes. Sublake permafrost is maintained when the maximum ice thickness (MIT) exceeds lake depth and mean annual bed temperatures (MABTs) remain below freezing. However, declining MIT since the 1970s is likely causing talik development below shallow lakes. Here we show high-temperature sensitivity to winter ice growth at the water-sediment interface of shallow lakes based on year-round lake sensor data. Empirical model experiments suggest that shallow (1m depth) lakes have warmed substantially over the last 30years (2.4°C), withMABT above freezing5 of the last 7years.This is incomparison to slower ratesofwarming in deeper (3 m) lakes (0.9°C), with already well-developed taliks. Our findings indicate that permafrost below shallow lakes has already begun crossing a critical thawing threshold approximately 70 years prior to predicted terrestrial permafrost thaw in northern Alaska. |
format |
Article in Journal/Newspaper |
author |
Arp, Christopher D. Jones, Benjamin M. Grosse, Guido Bondurant, Allen C. Romanovsky, Vladimir E. Hinkel, Kenneth M. Parsekian, Andrew D. |
spellingShingle |
Arp, Christopher D. Jones, Benjamin M. Grosse, Guido Bondurant, Allen C. Romanovsky, Vladimir E. Hinkel, Kenneth M. Parsekian, Andrew D. Threshold sensitivity of shallow Arctic lakes and sublake permafrost to changing winter climate |
author_facet |
Arp, Christopher D. Jones, Benjamin M. Grosse, Guido Bondurant, Allen C. Romanovsky, Vladimir E. Hinkel, Kenneth M. Parsekian, Andrew D. |
author_sort |
Arp, Christopher D. |
title |
Threshold sensitivity of shallow Arctic lakes and sublake permafrost to changing winter climate |
title_short |
Threshold sensitivity of shallow Arctic lakes and sublake permafrost to changing winter climate |
title_full |
Threshold sensitivity of shallow Arctic lakes and sublake permafrost to changing winter climate |
title_fullStr |
Threshold sensitivity of shallow Arctic lakes and sublake permafrost to changing winter climate |
title_full_unstemmed |
Threshold sensitivity of shallow Arctic lakes and sublake permafrost to changing winter climate |
title_sort |
threshold sensitivity of shallow arctic lakes and sublake permafrost to changing winter climate |
publishDate |
2016 |
url |
https://epic.awi.de/id/eprint/41737/ https://doi.org/10.1002/2016GL068506 https://hdl.handle.net/10013/epic.48602 |
long_lat |
ENVELOPE(146.601,146.601,59.667,59.667) ENVELOPE(142.665,142.665,-66.993,-66.993) |
geographic |
Arctic Talik Round Lake |
geographic_facet |
Arctic Talik Round Lake |
genre |
Arctic Arctic Ice permafrost Alaska |
genre_facet |
Arctic Arctic Ice permafrost Alaska |
op_source |
EPIC3Geophysical Research Letters, 43(12), pp. 6358-6365, ISSN: 00948276 |
op_relation |
Arp, C. D. , Jones, B. M. , Grosse, G. orcid:0000-0001-5895-2141 , Bondurant, A. C. , Romanovsky, V. E. , Hinkel, K. M. and Parsekian, A. D. (2016) Threshold sensitivity of shallow Arctic lakes and sublake permafrost to changing winter climate , Geophysical Research Letters, 43 (12), pp. 6358-6365 . doi:10.1002/2016GL068506 <https://doi.org/10.1002/2016GL068506> , hdl:10013/epic.48602 |
op_doi |
https://doi.org/10.1002/2016GL068506 |
container_title |
Geophysical Research Letters |
container_volume |
43 |
container_issue |
12 |
container_start_page |
6358 |
op_container_end_page |
6365 |
_version_ |
1766300683498160128 |