Dissolved organic carbon loss from Yedoma permafrost amplified by ice wedge thaw
Pleistocene Yedoma permafrost contains nearly a third of all organic matter (OM) stored in circum-arctic permafrost and is characterized by the presence of massive ice wedges. Due to its rapid formation by sediment accumulation and subsequent frozen storage, Yedoma OM is relatively well preserved an...
Published in: | Environmental Research Letters |
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Main Authors: | , , , , , , , , , |
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Language: | English |
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2013
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Online Access: | https://hdl.handle.net/11370/ab42def5-eb0b-46d5-a259-7d564a88cb23 https://research.rug.nl/en/publications/ab42def5-eb0b-46d5-a259-7d564a88cb23 https://doi.org/10.1088/1748-9326/8/3/035023 https://pure.rug.nl/ws/files/55429985/pdf.pdf |
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ftunigroningenpu:oai:pure.rug.nl:publications/ab42def5-eb0b-46d5-a259-7d564a88cb23 2024-06-02T08:02:33+00:00 Dissolved organic carbon loss from Yedoma permafrost amplified by ice wedge thaw Vonk, J. E. Mann, P. J. Dowdy, K. L. Davydova, A. Davydov, S. P. Zimov, N. Spencer, R. G. M. Bulygina, E. B. Eglinton, T. I. Holmes, R. M. 2013 application/pdf https://hdl.handle.net/11370/ab42def5-eb0b-46d5-a259-7d564a88cb23 https://research.rug.nl/en/publications/ab42def5-eb0b-46d5-a259-7d564a88cb23 https://doi.org/10.1088/1748-9326/8/3/035023 https://pure.rug.nl/ws/files/55429985/pdf.pdf eng eng https://research.rug.nl/en/publications/ab42def5-eb0b-46d5-a259-7d564a88cb23 info:eu-repo/semantics/openAccess Vonk , J E , Mann , P J , Dowdy , K L , Davydova , A , Davydov , S P , Zimov , N , Spencer , R G M , Bulygina , E B , Eglinton , T I & Holmes , R M 2013 , ' Dissolved organic carbon loss from Yedoma permafrost amplified by ice wedge thaw ' , Environmental Research Letters , vol. 8 , 035023 . https://doi.org/10.1088/1748-9326/8/3/035023 Yedoma permafrost ice wedges biodegradable dissolved organic matter enzymes fluorescence NORTHEASTERN SIBERIA MATTER FLUORESCENCE NORTHERN YAKUTIA SOILS VULNERABILITY CLIMATE RIVER BACTERIOPLANKTON ENVIRONMENT ANCIENT article 2013 ftunigroningenpu https://doi.org/10.1088/1748-9326/8/3/035023 2024-05-07T19:05:36Z Pleistocene Yedoma permafrost contains nearly a third of all organic matter (OM) stored in circum-arctic permafrost and is characterized by the presence of massive ice wedges. Due to its rapid formation by sediment accumulation and subsequent frozen storage, Yedoma OM is relatively well preserved and highly biologically available (biolabile) upon thaw. A better understanding of the processes regulating Yedoma degradation is important to improve estimates of the response and magnitude of permafrost carbon feedbacks to climate warming. In this study, we examine the composition of ice wedges and the influence of ice wedge thaw on the biolability of Yedoma OM. Incubation assays were used to assess OM biolability, fluorescence spectroscopy to characterize the OM composition, and potential enzyme activity rates to examine the controls and regulation of OM degradation. We show that increasing amounts of ice wedge melt water in Yedoma-leached incubations enhanced the loss of dissolved OM over time. This may be attributed to the presence of low-molecular weight compounds and low initial phenolic content in the OM of ice wedges, providing a readily available substrate that promotes the degradation of Yedoma OC. The physical vulnerability of ice wedges upon thaw (causing irreversible collapse), combined with the composition of ice wedge-engrained OM (co-metabolizing old OM), underlines the particularly strong potential of Yedoma to generate a positive feedback to climate warming relative to other forms of non-ice wedge permafrost. Article in Journal/Newspaper Arctic Ice permafrost wedge* Yakutia Siberia University of Groningen research database Arctic Environmental Research Letters 8 3 035023 |
institution |
Open Polar |
collection |
University of Groningen research database |
op_collection_id |
ftunigroningenpu |
language |
English |
topic |
Yedoma permafrost ice wedges biodegradable dissolved organic matter enzymes fluorescence NORTHEASTERN SIBERIA MATTER FLUORESCENCE NORTHERN YAKUTIA SOILS VULNERABILITY CLIMATE RIVER BACTERIOPLANKTON ENVIRONMENT ANCIENT |
spellingShingle |
Yedoma permafrost ice wedges biodegradable dissolved organic matter enzymes fluorescence NORTHEASTERN SIBERIA MATTER FLUORESCENCE NORTHERN YAKUTIA SOILS VULNERABILITY CLIMATE RIVER BACTERIOPLANKTON ENVIRONMENT ANCIENT Vonk, J. E. Mann, P. J. Dowdy, K. L. Davydova, A. Davydov, S. P. Zimov, N. Spencer, R. G. M. Bulygina, E. B. Eglinton, T. I. Holmes, R. M. Dissolved organic carbon loss from Yedoma permafrost amplified by ice wedge thaw |
topic_facet |
Yedoma permafrost ice wedges biodegradable dissolved organic matter enzymes fluorescence NORTHEASTERN SIBERIA MATTER FLUORESCENCE NORTHERN YAKUTIA SOILS VULNERABILITY CLIMATE RIVER BACTERIOPLANKTON ENVIRONMENT ANCIENT |
description |
Pleistocene Yedoma permafrost contains nearly a third of all organic matter (OM) stored in circum-arctic permafrost and is characterized by the presence of massive ice wedges. Due to its rapid formation by sediment accumulation and subsequent frozen storage, Yedoma OM is relatively well preserved and highly biologically available (biolabile) upon thaw. A better understanding of the processes regulating Yedoma degradation is important to improve estimates of the response and magnitude of permafrost carbon feedbacks to climate warming. In this study, we examine the composition of ice wedges and the influence of ice wedge thaw on the biolability of Yedoma OM. Incubation assays were used to assess OM biolability, fluorescence spectroscopy to characterize the OM composition, and potential enzyme activity rates to examine the controls and regulation of OM degradation. We show that increasing amounts of ice wedge melt water in Yedoma-leached incubations enhanced the loss of dissolved OM over time. This may be attributed to the presence of low-molecular weight compounds and low initial phenolic content in the OM of ice wedges, providing a readily available substrate that promotes the degradation of Yedoma OC. The physical vulnerability of ice wedges upon thaw (causing irreversible collapse), combined with the composition of ice wedge-engrained OM (co-metabolizing old OM), underlines the particularly strong potential of Yedoma to generate a positive feedback to climate warming relative to other forms of non-ice wedge permafrost. |
format |
Article in Journal/Newspaper |
author |
Vonk, J. E. Mann, P. J. Dowdy, K. L. Davydova, A. Davydov, S. P. Zimov, N. Spencer, R. G. M. Bulygina, E. B. Eglinton, T. I. Holmes, R. M. |
author_facet |
Vonk, J. E. Mann, P. J. Dowdy, K. L. Davydova, A. Davydov, S. P. Zimov, N. Spencer, R. G. M. Bulygina, E. B. Eglinton, T. I. Holmes, R. M. |
author_sort |
Vonk, J. E. |
title |
Dissolved organic carbon loss from Yedoma permafrost amplified by ice wedge thaw |
title_short |
Dissolved organic carbon loss from Yedoma permafrost amplified by ice wedge thaw |
title_full |
Dissolved organic carbon loss from Yedoma permafrost amplified by ice wedge thaw |
title_fullStr |
Dissolved organic carbon loss from Yedoma permafrost amplified by ice wedge thaw |
title_full_unstemmed |
Dissolved organic carbon loss from Yedoma permafrost amplified by ice wedge thaw |
title_sort |
dissolved organic carbon loss from yedoma permafrost amplified by ice wedge thaw |
publishDate |
2013 |
url |
https://hdl.handle.net/11370/ab42def5-eb0b-46d5-a259-7d564a88cb23 https://research.rug.nl/en/publications/ab42def5-eb0b-46d5-a259-7d564a88cb23 https://doi.org/10.1088/1748-9326/8/3/035023 https://pure.rug.nl/ws/files/55429985/pdf.pdf |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Ice permafrost wedge* Yakutia Siberia |
genre_facet |
Arctic Ice permafrost wedge* Yakutia Siberia |
op_source |
Vonk , J E , Mann , P J , Dowdy , K L , Davydova , A , Davydov , S P , Zimov , N , Spencer , R G M , Bulygina , E B , Eglinton , T I & Holmes , R M 2013 , ' Dissolved organic carbon loss from Yedoma permafrost amplified by ice wedge thaw ' , Environmental Research Letters , vol. 8 , 035023 . https://doi.org/10.1088/1748-9326/8/3/035023 |
op_relation |
https://research.rug.nl/en/publications/ab42def5-eb0b-46d5-a259-7d564a88cb23 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1088/1748-9326/8/3/035023 |
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Environmental Research Letters |
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