Iron cycling in Arctic methane seeps
Anoxic marine sediments contribute a significant amount of dissolved iron (Fe2+) 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. W...
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ftnorduniv:oai:nordopen.nord.no:11250/2660852 2023-05-15T14:26:23+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 application/pdf https://hdl.handle.net/11250/2660852 https://doi.org/10.1007/s00367-020-00649-5 eng eng Springer Norges forskningsråd: 255150 Norges forskningsråd: 223259 Hong, W. L., Latour, P., Sauer, S., Sen, A., Gilhooly, W. P., Lepland, A. & Fouskas, F. (2020). Iron cycling in Arctic methane seeps. Geo-Marine Letters, 40, 391-401. doi: urn:issn:1432-1157 https://hdl.handle.net/11250/2660852 https://doi.org/10.1007/s00367-020-00649-5 cristin:1803941 Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no © 2020 The Author(s) CC-BY 391-401 40 Geo-Marine Letters VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Sedimentologi: 456 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450 Peer reviewed Journal article 2020 ftnorduniv https://doi.org/10.1007/s00367-020-00649-5 2021-07-13T18:12:32Z Anoxic marine sediments contribute a significant amount of dissolved iron (Fe2+) 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 Fe2+ diffusive fluxes towards the oxic sediment layer to be in the range of 0.8 to 138.7 μmole/m2/day and Fe2+ fluxes across the sediment-water interface to be in the range of 0.3 to 102.2 μmole/m2/day. Such variable fluxes cannot be explained by Fe2+ production from organic matter–coupled dissimilatory reduction alone. We propose that the reduction of dissolved and complexed Fe3+ as well as the rapid formation of iron sulfide minerals are the most important reactions regulating the fluxes of Fe2+ 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 publishedVersion Paid Open Access Article in Journal/Newspaper Arctic arctic methane Arctic Open archive Nord universitet Arctic Geo-Marine Letters 40 3 391 401 |
institution |
Open Polar |
collection |
Open archive Nord universitet |
op_collection_id |
ftnorduniv |
language |
English |
topic |
VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Sedimentologi: 456 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450 |
spellingShingle |
VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Sedimentologi: 456 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::Matematikk og Naturvitenskap: 400::Geofag: 450::Sedimentologi: 456 VDP::Matematikk og Naturvitenskap: 400::Geofag: 450 |
description |
Anoxic marine sediments contribute a significant amount of dissolved iron (Fe2+) 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 Fe2+ diffusive fluxes towards the oxic sediment layer to be in the range of 0.8 to 138.7 μmole/m2/day and Fe2+ fluxes across the sediment-water interface to be in the range of 0.3 to 102.2 μmole/m2/day. Such variable fluxes cannot be explained by Fe2+ production from organic matter–coupled dissimilatory reduction alone. We propose that the reduction of dissolved and complexed Fe3+ as well as the rapid formation of iron sulfide minerals are the most important reactions regulating the fluxes of Fe2+ 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 publishedVersion Paid Open Access |
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/11250/2660852 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_source |
391-401 40 Geo-Marine Letters |
op_relation |
Norges forskningsråd: 255150 Norges forskningsråd: 223259 Hong, W. L., Latour, P., Sauer, S., Sen, A., Gilhooly, W. P., Lepland, A. & Fouskas, F. (2020). Iron cycling in Arctic methane seeps. Geo-Marine Letters, 40, 391-401. doi: urn:issn:1432-1157 https://hdl.handle.net/11250/2660852 https://doi.org/10.1007/s00367-020-00649-5 cristin:1803941 |
op_rights |
Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no © 2020 The Author(s) |
op_rightsnorm |
CC-BY |
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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1766298910182080512 |