Iron cycling in Arctic methane seeps
Anoxic marine sediments contribute a significant amount of dissolved iron (Fe 2+ ) to the ocean which is crucial for the global carbon cycle. Here, we investigate iron cycling in four Arctic cold seeps where sediments are anoxic and sulfidic due to the high rates of methane-fueled sulfate reduction....
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ftunivtroemsoe:oai:munin.uit.no:10037/17968 2023-05-15T14:24:25+02:00 Iron cycling in Arctic methane seeps Hong, Wei-Li Latour, Pauline Sauer, Simone Sen, Arunima Gilhooly, William P. Lepland, Aivo Fouskas, Fotios 2020-03-26 https://hdl.handle.net/10037/17968 https://doi.org/10.1007/s00367-020-00649-5 eng eng Springer Geo-Marine Letters Norges forskningsråd: 255150 Norges forskningsråd: 223259 info:eu-repo/grantAgreement/RCN/PETROMAKS2/255150/Norway/Norwegian margin fluid systems and methane- derived carbonate crusts - Recent scientific advances in service of petroleum exploration// info:eu-repo/grantAgreement/RCN/SFF/223259/Norway/Centre for Arctic Gas Hydrate, Environment and Climate/CAGE/ Hong H, Latour, Sauer S, Sen A, Gilhooly, Lepland A, Fouskas. Iron cycling in Arctic methane seeps. Geo-Marine Letters. 2020 FRIDAID 1803941 doi:10.1007/s00367-020-00649-5 0276-0460 1432-1157 https://hdl.handle.net/10037/17968 openAccess Copyright 2020 The Author(s) VDP::Mathematics and natural science: 400::Geosciences: 450 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450 Journal article Tidsskriftartikkel Peer reviewed publishedVersion 2020 ftunivtroemsoe https://doi.org/10.1007/s00367-020-00649-5 2021-06-25T17:57:22Z Anoxic marine sediments contribute a significant amount of dissolved iron (Fe 2+ ) to the ocean which is crucial for the global carbon cycle. Here, we investigate iron cycling in four Arctic cold seeps where sediments are anoxic and sulfidic due to the high rates of methane-fueled sulfate reduction. We estimated Fe 2+ diffusive fluxes towards the oxic sediment layer to be in the range of 0.8 to 138.7 μmole/m 2 /day and Fe 2+ fluxes across the sediment-water interface to be in the range of 0.3 to 102.2 μmole/m 2 /day. Such variable fluxes cannot be explained by Fe 2+ production from organic matter–coupled dissimilatory reduction alone. We propose that the reduction of dissolved and complexed Fe 3+ as well as the rapid formation of iron sulfide minerals are the most important reactions regulating the fluxes of Fe 2+ in these cold seeps. By comparing seafloor visual observations with subsurface pore fluid composition, we demonstrate how the joint cycling of iron and sulfur determines the distribution of chemosynthesis-based biota. Article in Journal/Newspaper Arctic arctic methane Arctic University of Tromsø: Munin Open Research Archive Arctic Geo-Marine Letters 40 3 391 401 |
institution |
Open Polar |
collection |
University of Tromsø: Munin Open Research Archive |
op_collection_id |
ftunivtroemsoe |
language |
English |
topic |
VDP::Mathematics and natural science: 400::Geosciences: 450 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450 |
spellingShingle |
VDP::Mathematics and natural science: 400::Geosciences: 450 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450 Hong, Wei-Li Latour, Pauline Sauer, Simone Sen, Arunima Gilhooly, William P. Lepland, Aivo Fouskas, Fotios Iron cycling in Arctic methane seeps |
topic_facet |
VDP::Mathematics and natural science: 400::Geosciences: 450 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450 |
description |
Anoxic marine sediments contribute a significant amount of dissolved iron (Fe 2+ ) to the ocean which is crucial for the global carbon cycle. Here, we investigate iron cycling in four Arctic cold seeps where sediments are anoxic and sulfidic due to the high rates of methane-fueled sulfate reduction. We estimated Fe 2+ diffusive fluxes towards the oxic sediment layer to be in the range of 0.8 to 138.7 μmole/m 2 /day and Fe 2+ fluxes across the sediment-water interface to be in the range of 0.3 to 102.2 μmole/m 2 /day. Such variable fluxes cannot be explained by Fe 2+ production from organic matter–coupled dissimilatory reduction alone. We propose that the reduction of dissolved and complexed Fe 3+ as well as the rapid formation of iron sulfide minerals are the most important reactions regulating the fluxes of Fe 2+ in these cold seeps. By comparing seafloor visual observations with subsurface pore fluid composition, we demonstrate how the joint cycling of iron and sulfur determines the distribution of chemosynthesis-based biota. |
format |
Article in Journal/Newspaper |
author |
Hong, Wei-Li Latour, Pauline Sauer, Simone Sen, Arunima Gilhooly, William P. Lepland, Aivo Fouskas, Fotios |
author_facet |
Hong, Wei-Li Latour, Pauline Sauer, Simone Sen, Arunima Gilhooly, William P. Lepland, Aivo Fouskas, Fotios |
author_sort |
Hong, Wei-Li |
title |
Iron cycling in Arctic methane seeps |
title_short |
Iron cycling in Arctic methane seeps |
title_full |
Iron cycling in Arctic methane seeps |
title_fullStr |
Iron cycling in Arctic methane seeps |
title_full_unstemmed |
Iron cycling in Arctic methane seeps |
title_sort |
iron cycling in arctic methane seeps |
publisher |
Springer |
publishDate |
2020 |
url |
https://hdl.handle.net/10037/17968 https://doi.org/10.1007/s00367-020-00649-5 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic arctic methane Arctic |
genre_facet |
Arctic arctic methane Arctic |
op_relation |
Geo-Marine Letters Norges forskningsråd: 255150 Norges forskningsråd: 223259 info:eu-repo/grantAgreement/RCN/PETROMAKS2/255150/Norway/Norwegian margin fluid systems and methane- derived carbonate crusts - Recent scientific advances in service of petroleum exploration// info:eu-repo/grantAgreement/RCN/SFF/223259/Norway/Centre for Arctic Gas Hydrate, Environment and Climate/CAGE/ Hong H, Latour, Sauer S, Sen A, Gilhooly, Lepland A, Fouskas. Iron cycling in Arctic methane seeps. Geo-Marine Letters. 2020 FRIDAID 1803941 doi:10.1007/s00367-020-00649-5 0276-0460 1432-1157 https://hdl.handle.net/10037/17968 |
op_rights |
openAccess Copyright 2020 The Author(s) |
op_doi |
https://doi.org/10.1007/s00367-020-00649-5 |
container_title |
Geo-Marine Letters |
container_volume |
40 |
container_issue |
3 |
container_start_page |
391 |
op_container_end_page |
401 |
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1766296837256380416 |