Small Lake - Large Impact? Sedimentary records from Northern Alaska reveal lake expansion history and carbon dynamics
Thermokarst lakes are characteristic and dynamic landscape features of ice-rich permafrost environments. Our study of sedimentary records and shoreline expansion of Peatball Lake on the Alaska Arctic Coastal Plain reveals 1,400 years of thermokarst activity. While Peatball Lake likely initiated from...
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ftawi:oai:epic.awi.de:47894 2024-09-15T18:11:35+00:00 Small Lake - Large Impact? Sedimentary records from Northern Alaska reveal lake expansion history and carbon dynamics Lenz, Josefine Jones, Benjamin M. Wetterich, Sebastian Tjallingii, Rik Fritz, Michael Arp, Christopher D. Rudaya, Natalia Grosse, Guido 2018-04-11 application/pdf https://epic.awi.de/id/eprint/47894/ https://epic.awi.de/id/eprint/47894/1/EGU2018-9163.pdf https://epic.awi.de/id/eprint/47894/6/EGU2017_Poster_Lenz.pdf https://meetingorganizer.copernicus.org/EGU2018/EGU2018-9163.pdf https://hdl.handle.net/10013/epic.74610012-6eb9-4737-a6ee-c91bebac16d0 unknown https://epic.awi.de/id/eprint/47894/1/EGU2018-9163.pdf https://epic.awi.de/id/eprint/47894/6/EGU2017_Poster_Lenz.pdf Lenz, J. orcid:0000-0002-4050-3169 , Jones, B. M. , Wetterich, S. orcid:0000-0001-9234-1192 , Tjallingii, R. , Fritz, M. orcid:0000-0003-4591-7325 , Arp, C. D. , Rudaya, N. and Grosse, G. orcid:0000-0001-5895-2141 (2018) Small Lake - Large Impact? Sedimentary records from Northern Alaska reveal lake expansion history and carbon dynamics , European Geosciences Union General Assembly 2018, Vienna, Austria, 8 April 2018 - 13 April 2018 . hdl:10013/epic.74610012-6eb9-4737-a6ee-c91bebac16d0 info:eu-repo/semantics/openAccess EPIC3European Geosciences Union General Assembly 2018, Vienna, Austria, 2018-04-08-2018-04-13Vienna, Austria Conference notRev info:eu-repo/semantics/conferenceObject 2018 ftawi 2024-06-24T04:21:00Z Thermokarst lakes are characteristic and dynamic landscape features of ice-rich permafrost environments. Our study of sedimentary records and shoreline expansion of Peatball Lake on the Alaska Arctic Coastal Plain reveals 1,400 years of thermokarst activity. While Peatball Lake likely initiated from a remnant pond of a drained lake basin, the catchment is likewise characterized by mid to late Holocene aged drained basins and remnants of Pleistocene and early Holocene aged uplands. As the lake expanded through lateral permafrost degradation, the sediment source has changed as indicated by internal-lake variability in sediment deposition. Reversed radiocarbon ages show recycling of “old” carbon and degraded organic matter became redeposited in the lake basin resulting in nutrient-poor sublittoral deposits. Our sedimentary records reflect the complexity of depositional environments in thermokarst lakes due to spatio-temporal changes in lake and catchment morphology as well as the impact of thermokarst lake activity on carbon storage of periglacial landscapes. Conference Object Ice permafrost Thermokarst Alaska Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
institution |
Open Polar |
collection |
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
Thermokarst lakes are characteristic and dynamic landscape features of ice-rich permafrost environments. Our study of sedimentary records and shoreline expansion of Peatball Lake on the Alaska Arctic Coastal Plain reveals 1,400 years of thermokarst activity. While Peatball Lake likely initiated from a remnant pond of a drained lake basin, the catchment is likewise characterized by mid to late Holocene aged drained basins and remnants of Pleistocene and early Holocene aged uplands. As the lake expanded through lateral permafrost degradation, the sediment source has changed as indicated by internal-lake variability in sediment deposition. Reversed radiocarbon ages show recycling of “old” carbon and degraded organic matter became redeposited in the lake basin resulting in nutrient-poor sublittoral deposits. Our sedimentary records reflect the complexity of depositional environments in thermokarst lakes due to spatio-temporal changes in lake and catchment morphology as well as the impact of thermokarst lake activity on carbon storage of periglacial landscapes. |
format |
Conference Object |
author |
Lenz, Josefine Jones, Benjamin M. Wetterich, Sebastian Tjallingii, Rik Fritz, Michael Arp, Christopher D. Rudaya, Natalia Grosse, Guido |
spellingShingle |
Lenz, Josefine Jones, Benjamin M. Wetterich, Sebastian Tjallingii, Rik Fritz, Michael Arp, Christopher D. Rudaya, Natalia Grosse, Guido Small Lake - Large Impact? Sedimentary records from Northern Alaska reveal lake expansion history and carbon dynamics |
author_facet |
Lenz, Josefine Jones, Benjamin M. Wetterich, Sebastian Tjallingii, Rik Fritz, Michael Arp, Christopher D. Rudaya, Natalia Grosse, Guido |
author_sort |
Lenz, Josefine |
title |
Small Lake - Large Impact? Sedimentary records from Northern Alaska reveal lake expansion history and carbon dynamics |
title_short |
Small Lake - Large Impact? Sedimentary records from Northern Alaska reveal lake expansion history and carbon dynamics |
title_full |
Small Lake - Large Impact? Sedimentary records from Northern Alaska reveal lake expansion history and carbon dynamics |
title_fullStr |
Small Lake - Large Impact? Sedimentary records from Northern Alaska reveal lake expansion history and carbon dynamics |
title_full_unstemmed |
Small Lake - Large Impact? Sedimentary records from Northern Alaska reveal lake expansion history and carbon dynamics |
title_sort |
small lake - large impact? sedimentary records from northern alaska reveal lake expansion history and carbon dynamics |
publishDate |
2018 |
url |
https://epic.awi.de/id/eprint/47894/ https://epic.awi.de/id/eprint/47894/1/EGU2018-9163.pdf https://epic.awi.de/id/eprint/47894/6/EGU2017_Poster_Lenz.pdf https://meetingorganizer.copernicus.org/EGU2018/EGU2018-9163.pdf https://hdl.handle.net/10013/epic.74610012-6eb9-4737-a6ee-c91bebac16d0 |
genre |
Ice permafrost Thermokarst Alaska |
genre_facet |
Ice permafrost Thermokarst Alaska |
op_source |
EPIC3European Geosciences Union General Assembly 2018, Vienna, Austria, 2018-04-08-2018-04-13Vienna, Austria |
op_relation |
https://epic.awi.de/id/eprint/47894/1/EGU2018-9163.pdf https://epic.awi.de/id/eprint/47894/6/EGU2017_Poster_Lenz.pdf Lenz, J. orcid:0000-0002-4050-3169 , Jones, B. M. , Wetterich, S. orcid:0000-0001-9234-1192 , Tjallingii, R. , Fritz, M. orcid:0000-0003-4591-7325 , Arp, C. D. , Rudaya, N. and Grosse, G. orcid:0000-0001-5895-2141 (2018) Small Lake - Large Impact? Sedimentary records from Northern Alaska reveal lake expansion history and carbon dynamics , European Geosciences Union General Assembly 2018, Vienna, Austria, 8 April 2018 - 13 April 2018 . hdl:10013/epic.74610012-6eb9-4737-a6ee-c91bebac16d0 |
op_rights |
info:eu-repo/semantics/openAccess |
_version_ |
1810449175341432832 |