A pulse of meteoric subsurface fluid discharging into the Chukchi Sea during the Early Holocene Thermal Maximum (EHTM)
The response of Arctic Ocean biogeochemistry to subsurface flow driven by permafrost thaw is poorly understood. We present dissolved chloride and water isotopic data from the Chukchi Sea Shelf sediments that reveal the presence of a meteoric subsurface flow enriched in cations with a radiogenic Sr f...
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ftawi:oai:epic.awi.de:54427 2024-09-15T17:53:56+00:00 A pulse of meteoric subsurface fluid discharging into the Chukchi Sea during the Early Holocene Thermal Maximum (EHTM) Kim, Ji‐Hoon Hong, Wei‐Li Torres, Marta E. Ryu, Jong‐Sik Kang, Moo‐Hee Han, Dukki Nam, Seung‐Il Hur, Jin Koh, Dong‐Chan Niessen, Frank Lee, Dong‐Hun Jang, Kwangchul Buchanan Rae, James William Chen, Meilian 2021 https://epic.awi.de/id/eprint/54427/ https://doi.org/10.1029/2021GC009750 https://hdl.handle.net/10013/epic.83e2b7d1-1848-4211-8486-ad704d7adcc2 unknown Kim, J. , Hong, W. , Torres, M. E. , Ryu, J. , Kang, M. , Han, D. , Nam, S. , Hur, J. , Koh, D. , Niessen, F. orcid:0000-0001-6453-0594 , Lee, D. , Jang, K. , Buchanan Rae, J. W. and Chen, M. (2021) A pulse of meteoric subsurface fluid discharging into the Chukchi Sea during the Early Holocene Thermal Maximum (EHTM) , Geochemistry, Geophysics, Geosystems . doi:10.1029/2021GC009750 <https://doi.org/10.1029/2021GC009750> , hdl:10013/epic.83e2b7d1-1848-4211-8486-ad704d7adcc2 EPIC3Geochemistry, Geophysics, Geosystems, ISSN: 1525-2027 Article isiRev 2021 ftawi https://doi.org/10.1029/2021GC009750 2024-06-24T04:27:29Z The response of Arctic Ocean biogeochemistry to subsurface flow driven by permafrost thaw is poorly understood. We present dissolved chloride and water isotopic data from the Chukchi Sea Shelf sediments that reveal the presence of a meteoric subsurface flow enriched in cations with a radiogenic Sr fingerprint. This subsurface fluid is also enriched in dissolved inorganic carbon and methane that bear isotopic compositions indicative of a carbon reservoir modified by reactions in a closed system. Such fluid characteristics are in stark contrast with those from other sites in the Chukchi Sea where the pore water composition shows no sign of meteoric input, but reflect typical biogeochemical reactions associated with early diagenetic sequences in marine sediment. The most likely source of the observed subsurface flow at the Chukchi Sea Shelf is from the degradation of permafrost that had extended to the shelf region during the Last Glacial Maximum. Our data suggest that the permafrost-driven subsurface flow most likely took place during the 2-3 oC warming in the Early Holocene Thermal Maximum (EHTM). This time scale is supported by numerical simulation of pore fluid profiles, which indicate that a minimum of several thousand years must have passed since the cessation of the subsurface methane-bearing fluid flow. Article in Journal/Newspaper Arctic Ocean Chukchi Chukchi Sea permafrost Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Geochemistry, Geophysics, Geosystems 22 8 |
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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 |
The response of Arctic Ocean biogeochemistry to subsurface flow driven by permafrost thaw is poorly understood. We present dissolved chloride and water isotopic data from the Chukchi Sea Shelf sediments that reveal the presence of a meteoric subsurface flow enriched in cations with a radiogenic Sr fingerprint. This subsurface fluid is also enriched in dissolved inorganic carbon and methane that bear isotopic compositions indicative of a carbon reservoir modified by reactions in a closed system. Such fluid characteristics are in stark contrast with those from other sites in the Chukchi Sea where the pore water composition shows no sign of meteoric input, but reflect typical biogeochemical reactions associated with early diagenetic sequences in marine sediment. The most likely source of the observed subsurface flow at the Chukchi Sea Shelf is from the degradation of permafrost that had extended to the shelf region during the Last Glacial Maximum. Our data suggest that the permafrost-driven subsurface flow most likely took place during the 2-3 oC warming in the Early Holocene Thermal Maximum (EHTM). This time scale is supported by numerical simulation of pore fluid profiles, which indicate that a minimum of several thousand years must have passed since the cessation of the subsurface methane-bearing fluid flow. |
format |
Article in Journal/Newspaper |
author |
Kim, Ji‐Hoon Hong, Wei‐Li Torres, Marta E. Ryu, Jong‐Sik Kang, Moo‐Hee Han, Dukki Nam, Seung‐Il Hur, Jin Koh, Dong‐Chan Niessen, Frank Lee, Dong‐Hun Jang, Kwangchul Buchanan Rae, James William Chen, Meilian |
spellingShingle |
Kim, Ji‐Hoon Hong, Wei‐Li Torres, Marta E. Ryu, Jong‐Sik Kang, Moo‐Hee Han, Dukki Nam, Seung‐Il Hur, Jin Koh, Dong‐Chan Niessen, Frank Lee, Dong‐Hun Jang, Kwangchul Buchanan Rae, James William Chen, Meilian A pulse of meteoric subsurface fluid discharging into the Chukchi Sea during the Early Holocene Thermal Maximum (EHTM) |
author_facet |
Kim, Ji‐Hoon Hong, Wei‐Li Torres, Marta E. Ryu, Jong‐Sik Kang, Moo‐Hee Han, Dukki Nam, Seung‐Il Hur, Jin Koh, Dong‐Chan Niessen, Frank Lee, Dong‐Hun Jang, Kwangchul Buchanan Rae, James William Chen, Meilian |
author_sort |
Kim, Ji‐Hoon |
title |
A pulse of meteoric subsurface fluid discharging into the Chukchi Sea during the Early Holocene Thermal Maximum (EHTM) |
title_short |
A pulse of meteoric subsurface fluid discharging into the Chukchi Sea during the Early Holocene Thermal Maximum (EHTM) |
title_full |
A pulse of meteoric subsurface fluid discharging into the Chukchi Sea during the Early Holocene Thermal Maximum (EHTM) |
title_fullStr |
A pulse of meteoric subsurface fluid discharging into the Chukchi Sea during the Early Holocene Thermal Maximum (EHTM) |
title_full_unstemmed |
A pulse of meteoric subsurface fluid discharging into the Chukchi Sea during the Early Holocene Thermal Maximum (EHTM) |
title_sort |
pulse of meteoric subsurface fluid discharging into the chukchi sea during the early holocene thermal maximum (ehtm) |
publishDate |
2021 |
url |
https://epic.awi.de/id/eprint/54427/ https://doi.org/10.1029/2021GC009750 https://hdl.handle.net/10013/epic.83e2b7d1-1848-4211-8486-ad704d7adcc2 |
genre |
Arctic Ocean Chukchi Chukchi Sea permafrost |
genre_facet |
Arctic Ocean Chukchi Chukchi Sea permafrost |
op_source |
EPIC3Geochemistry, Geophysics, Geosystems, ISSN: 1525-2027 |
op_relation |
Kim, J. , Hong, W. , Torres, M. E. , Ryu, J. , Kang, M. , Han, D. , Nam, S. , Hur, J. , Koh, D. , Niessen, F. orcid:0000-0001-6453-0594 , Lee, D. , Jang, K. , Buchanan Rae, J. W. and Chen, M. (2021) A pulse of meteoric subsurface fluid discharging into the Chukchi Sea during the Early Holocene Thermal Maximum (EHTM) , Geochemistry, Geophysics, Geosystems . doi:10.1029/2021GC009750 <https://doi.org/10.1029/2021GC009750> , hdl:10013/epic.83e2b7d1-1848-4211-8486-ad704d7adcc2 |
op_doi |
https://doi.org/10.1029/2021GC009750 |
container_title |
Geochemistry, Geophysics, Geosystems |
container_volume |
22 |
container_issue |
8 |
_version_ |
1810430076222701568 |