First 236U data from the Arctic Ocean and use of 236U/238U and 129I/236U as a new dual tracer
The first dataset of 236U/238U in the water column of the Arctic Ocean (AO) is presented and shows the widest range of ratios reported so far in the open ocean, from (5±55±5) to (3840±260)×10−12(3840±260)×10−12. Surface samples and depth profiles were collected during two GEOTRACES expeditions in 20...
Published in: | Earth and Planetary Science Letters |
---|---|
Main Authors: | , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
Elsevier
2016
|
Subjects: | |
Online Access: | https://doi.org/10.1016/j.epsl.2016.02.020 https://ora.ox.ac.uk/objects/uuid:f4d9adf5-3cd6-4c58-b668-d8c5e565718c |
id |
ftuloxford:oai:ora.ox.ac.uk:uuid:f4d9adf5-3cd6-4c58-b668-d8c5e565718c |
---|---|
record_format |
openpolar |
spelling |
ftuloxford:oai:ora.ox.ac.uk:uuid:f4d9adf5-3cd6-4c58-b668-d8c5e565718c 2023-05-15T14:55:48+02:00 First 236U data from the Arctic Ocean and use of 236U/238U and 129I/236U as a new dual tracer Casacuberta, N Masque, P Henderson, G van der Loeff, M Bauch, D Vockenhuber, C Daraoui, A Walther, C Synal, H 2016-07-29 https://doi.org/10.1016/j.epsl.2016.02.020 https://ora.ox.ac.uk/objects/uuid:f4d9adf5-3cd6-4c58-b668-d8c5e565718c unknown Elsevier doi:10.1016/j.epsl.2016.02.020 https://ora.ox.ac.uk/objects/uuid:f4d9adf5-3cd6-4c58-b668-d8c5e565718c https://doi.org/10.1016/j.epsl.2016.02.020 info:eu-repo/semantics/openAccess Journal article 2016 ftuloxford https://doi.org/10.1016/j.epsl.2016.02.020 2022-06-28T20:28:06Z The first dataset of 236U/238U in the water column of the Arctic Ocean (AO) is presented and shows the widest range of ratios reported so far in the open ocean, from (5±55±5) to (3840±260)×10−12(3840±260)×10−12. Surface samples and depth profiles were collected during two GEOTRACES expeditions in 2011–2012 and analyzed for the concentrations of 236U and 129I, with the aim of investigating whether the combination of 236U/238U and 129I/236U can be used as a new oceanographic tool in the AO. Results show that the distributions of the 236U/238U and 129I/236U atomic ratios are consistent with the different water masses in the AO. High 236U/238U and 129I/236U ratios in the upper water column (>2000×10−12>2000×10−12 and >200, respectively) illustrate the penetration of Atlantic waters (AW) into the AO. Lower values were found in Pacific waters (PW) and deep waters of the AO. Rivers seem to represent a temporally and spatially-constrained third anthropogenic source of 236U but more data are needed to confirm this. In a simple mixing model, the combination of 236U/238U and 129I/236U reveals a high contribution (>99%) of natural background waters (pre-nuclear era) in the deep and bottom waters of the Amerasian basin, indicating an apparent water mass renewal time of >1000 years. Despite the relatively high apparent age of the Amerasian Basin deep waters, this work shows the potential of using the dual-tracer approach as a new oceanographic tool in the Arctic Ocean. Article in Journal/Newspaper Arctic Arctic Ocean ORA - Oxford University Research Archive Arctic Arctic Ocean Pacific Earth and Planetary Science Letters 440 127 134 |
institution |
Open Polar |
collection |
ORA - Oxford University Research Archive |
op_collection_id |
ftuloxford |
language |
unknown |
description |
The first dataset of 236U/238U in the water column of the Arctic Ocean (AO) is presented and shows the widest range of ratios reported so far in the open ocean, from (5±55±5) to (3840±260)×10−12(3840±260)×10−12. Surface samples and depth profiles were collected during two GEOTRACES expeditions in 2011–2012 and analyzed for the concentrations of 236U and 129I, with the aim of investigating whether the combination of 236U/238U and 129I/236U can be used as a new oceanographic tool in the AO. Results show that the distributions of the 236U/238U and 129I/236U atomic ratios are consistent with the different water masses in the AO. High 236U/238U and 129I/236U ratios in the upper water column (>2000×10−12>2000×10−12 and >200, respectively) illustrate the penetration of Atlantic waters (AW) into the AO. Lower values were found in Pacific waters (PW) and deep waters of the AO. Rivers seem to represent a temporally and spatially-constrained third anthropogenic source of 236U but more data are needed to confirm this. In a simple mixing model, the combination of 236U/238U and 129I/236U reveals a high contribution (>99%) of natural background waters (pre-nuclear era) in the deep and bottom waters of the Amerasian basin, indicating an apparent water mass renewal time of >1000 years. Despite the relatively high apparent age of the Amerasian Basin deep waters, this work shows the potential of using the dual-tracer approach as a new oceanographic tool in the Arctic Ocean. |
format |
Article in Journal/Newspaper |
author |
Casacuberta, N Masque, P Henderson, G van der Loeff, M Bauch, D Vockenhuber, C Daraoui, A Walther, C Synal, H |
spellingShingle |
Casacuberta, N Masque, P Henderson, G van der Loeff, M Bauch, D Vockenhuber, C Daraoui, A Walther, C Synal, H First 236U data from the Arctic Ocean and use of 236U/238U and 129I/236U as a new dual tracer |
author_facet |
Casacuberta, N Masque, P Henderson, G van der Loeff, M Bauch, D Vockenhuber, C Daraoui, A Walther, C Synal, H |
author_sort |
Casacuberta, N |
title |
First 236U data from the Arctic Ocean and use of 236U/238U and 129I/236U as a new dual tracer |
title_short |
First 236U data from the Arctic Ocean and use of 236U/238U and 129I/236U as a new dual tracer |
title_full |
First 236U data from the Arctic Ocean and use of 236U/238U and 129I/236U as a new dual tracer |
title_fullStr |
First 236U data from the Arctic Ocean and use of 236U/238U and 129I/236U as a new dual tracer |
title_full_unstemmed |
First 236U data from the Arctic Ocean and use of 236U/238U and 129I/236U as a new dual tracer |
title_sort |
first 236u data from the arctic ocean and use of 236u/238u and 129i/236u as a new dual tracer |
publisher |
Elsevier |
publishDate |
2016 |
url |
https://doi.org/10.1016/j.epsl.2016.02.020 https://ora.ox.ac.uk/objects/uuid:f4d9adf5-3cd6-4c58-b668-d8c5e565718c |
geographic |
Arctic Arctic Ocean Pacific |
geographic_facet |
Arctic Arctic Ocean Pacific |
genre |
Arctic Arctic Ocean |
genre_facet |
Arctic Arctic Ocean |
op_relation |
doi:10.1016/j.epsl.2016.02.020 https://ora.ox.ac.uk/objects/uuid:f4d9adf5-3cd6-4c58-b668-d8c5e565718c https://doi.org/10.1016/j.epsl.2016.02.020 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1016/j.epsl.2016.02.020 |
container_title |
Earth and Planetary Science Letters |
container_volume |
440 |
container_start_page |
127 |
op_container_end_page |
134 |
_version_ |
1766327820259164160 |