Spatial variation and species transformation of 129 I and 127 I in the Central Arctic Ocean
The spatial distributions of anthropogenic 129 I and natural 127 I in iodide (I − ) and iodate (IO 3 - ) of anthropogenic 129 I and natural 127 I were investigated in the upper central Arctic Ocean. The results show that the molecular ratios of reductive iodide (I − ) to oxidative iodate (IO 3 - ) r...
Published in: | Earth and Planetary Science Letters |
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Main Authors: | , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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2023
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Online Access: | https://orbit.dtu.dk/en/publications/0519cc51-cbf3-4e1e-845c-2b4b3174198a https://doi.org/10.1016/j.epsl.2023.118165 https://backend.orbit.dtu.dk/ws/files/319040218/1_s2.0_S0012821X23001784_main.pdf |
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ftdtupubl:oai:pure.atira.dk:publications/0519cc51-cbf3-4e1e-845c-2b4b3174198a 2023-12-24T10:12:17+01:00 Spatial variation and species transformation of 129 I and 127 I in the Central Arctic Ocean Zhang, Luyuan Hou, Xiaolin Gwynn, Justin P. Karcher, Michael Chen, Ning Fan, Yukun Liu, Qi 2023 application/pdf https://orbit.dtu.dk/en/publications/0519cc51-cbf3-4e1e-845c-2b4b3174198a https://doi.org/10.1016/j.epsl.2023.118165 https://backend.orbit.dtu.dk/ws/files/319040218/1_s2.0_S0012821X23001784_main.pdf eng eng https://orbit.dtu.dk/en/publications/0519cc51-cbf3-4e1e-845c-2b4b3174198a info:eu-repo/semantics/openAccess Zhang , L , Hou , X , Gwynn , J P , Karcher , M , Chen , N , Fan , Y & Liu , Q 2023 , ' Spatial variation and species transformation of 129 I and 127 I in the Central Arctic Ocean ' , Earth and Planetary Science Letters , vol. 612 , 118165 . https://doi.org/10.1016/j.epsl.2023.118165 Speciation transformation 129I 127I Marine redox environment Geochemical cycling of iodine /dk/atira/pure/sustainabledevelopmentgoals/climate_action name=SDG 13 - Climate Action /dk/atira/pure/sustainabledevelopmentgoals/life_below_water name=SDG 14 - Life Below Water article 2023 ftdtupubl https://doi.org/10.1016/j.epsl.2023.118165 2023-11-30T00:08:58Z The spatial distributions of anthropogenic 129 I and natural 127 I in iodide (I − ) and iodate (IO 3 - ) of anthropogenic 129 I and natural 127 I were investigated in the upper central Arctic Ocean. The results show that the molecular ratios of reductive iodide (I − ) to oxidative iodate (IO 3 - ) ranged from 0.228 to 0.560 for 127 I and 0.383 to 0.827 for 129 I in the Polar Mixed Layer (PML). Greater 127 I − concentrations and markedly higher I − /IO 3 - ratios for both 129 I and 127 I were found in the PML over the Lomonosov and Alpha Ridges. This suggests that the in-situ formation of I − occurs as a result of enhanced reductive environments at these locations due to bacterial-mediated decomposition of dissolved organic matter (DOM) that likely originates from the inflow of river water into the central Arctic Ocean. Ratios of 129 I − / 129 IO 3 - and 127 I − / 127 IO 3 - decrease gradually along the main transport pathway of the Atlantic water, revealing that I − is gradually oxidized back to IO 3 - at a slow net rate within the Atlantic Water Layer. Our study provides insights into the marine geochemical cycling of iodine and raises the potential for iodine species, notably of 129 I, to be used as indicators of changes in the redox condition of surface water in the Arctic Ocean, which may occur due to the predicted impacts of climate change. Article in Journal/Newspaper Arctic Arctic Arctic Ocean Climate change Technical University of Denmark: DTU Orbit Arctic Arctic Ocean Earth and Planetary Science Letters 612 118165 |
institution |
Open Polar |
collection |
Technical University of Denmark: DTU Orbit |
op_collection_id |
ftdtupubl |
language |
English |
topic |
Speciation transformation 129I 127I Marine redox environment Geochemical cycling of iodine /dk/atira/pure/sustainabledevelopmentgoals/climate_action name=SDG 13 - Climate Action /dk/atira/pure/sustainabledevelopmentgoals/life_below_water name=SDG 14 - Life Below Water |
spellingShingle |
Speciation transformation 129I 127I Marine redox environment Geochemical cycling of iodine /dk/atira/pure/sustainabledevelopmentgoals/climate_action name=SDG 13 - Climate Action /dk/atira/pure/sustainabledevelopmentgoals/life_below_water name=SDG 14 - Life Below Water Zhang, Luyuan Hou, Xiaolin Gwynn, Justin P. Karcher, Michael Chen, Ning Fan, Yukun Liu, Qi Spatial variation and species transformation of 129 I and 127 I in the Central Arctic Ocean |
topic_facet |
Speciation transformation 129I 127I Marine redox environment Geochemical cycling of iodine /dk/atira/pure/sustainabledevelopmentgoals/climate_action name=SDG 13 - Climate Action /dk/atira/pure/sustainabledevelopmentgoals/life_below_water name=SDG 14 - Life Below Water |
description |
The spatial distributions of anthropogenic 129 I and natural 127 I in iodide (I − ) and iodate (IO 3 - ) of anthropogenic 129 I and natural 127 I were investigated in the upper central Arctic Ocean. The results show that the molecular ratios of reductive iodide (I − ) to oxidative iodate (IO 3 - ) ranged from 0.228 to 0.560 for 127 I and 0.383 to 0.827 for 129 I in the Polar Mixed Layer (PML). Greater 127 I − concentrations and markedly higher I − /IO 3 - ratios for both 129 I and 127 I were found in the PML over the Lomonosov and Alpha Ridges. This suggests that the in-situ formation of I − occurs as a result of enhanced reductive environments at these locations due to bacterial-mediated decomposition of dissolved organic matter (DOM) that likely originates from the inflow of river water into the central Arctic Ocean. Ratios of 129 I − / 129 IO 3 - and 127 I − / 127 IO 3 - decrease gradually along the main transport pathway of the Atlantic water, revealing that I − is gradually oxidized back to IO 3 - at a slow net rate within the Atlantic Water Layer. Our study provides insights into the marine geochemical cycling of iodine and raises the potential for iodine species, notably of 129 I, to be used as indicators of changes in the redox condition of surface water in the Arctic Ocean, which may occur due to the predicted impacts of climate change. |
format |
Article in Journal/Newspaper |
author |
Zhang, Luyuan Hou, Xiaolin Gwynn, Justin P. Karcher, Michael Chen, Ning Fan, Yukun Liu, Qi |
author_facet |
Zhang, Luyuan Hou, Xiaolin Gwynn, Justin P. Karcher, Michael Chen, Ning Fan, Yukun Liu, Qi |
author_sort |
Zhang, Luyuan |
title |
Spatial variation and species transformation of 129 I and 127 I in the Central Arctic Ocean |
title_short |
Spatial variation and species transformation of 129 I and 127 I in the Central Arctic Ocean |
title_full |
Spatial variation and species transformation of 129 I and 127 I in the Central Arctic Ocean |
title_fullStr |
Spatial variation and species transformation of 129 I and 127 I in the Central Arctic Ocean |
title_full_unstemmed |
Spatial variation and species transformation of 129 I and 127 I in the Central Arctic Ocean |
title_sort |
spatial variation and species transformation of 129 i and 127 i in the central arctic ocean |
publishDate |
2023 |
url |
https://orbit.dtu.dk/en/publications/0519cc51-cbf3-4e1e-845c-2b4b3174198a https://doi.org/10.1016/j.epsl.2023.118165 https://backend.orbit.dtu.dk/ws/files/319040218/1_s2.0_S0012821X23001784_main.pdf |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Arctic Arctic Arctic Ocean Climate change |
genre_facet |
Arctic Arctic Arctic Ocean Climate change |
op_source |
Zhang , L , Hou , X , Gwynn , J P , Karcher , M , Chen , N , Fan , Y & Liu , Q 2023 , ' Spatial variation and species transformation of 129 I and 127 I in the Central Arctic Ocean ' , Earth and Planetary Science Letters , vol. 612 , 118165 . https://doi.org/10.1016/j.epsl.2023.118165 |
op_relation |
https://orbit.dtu.dk/en/publications/0519cc51-cbf3-4e1e-845c-2b4b3174198a |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1016/j.epsl.2023.118165 |
container_title |
Earth and Planetary Science Letters |
container_volume |
612 |
container_start_page |
118165 |
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1786173551715287040 |