Water mass transformation in the Barents Sea inferred from radiogenic neodymium isotopes, rare earth elements and stable oxygen isotopes
Highlights • First comprehensive seawater Nd isotope and REE data set for the Barents Sea • Water masses traced with Nd isotopes, salinity and stable oxygen isotopes • No release of particulate REEs to the dissolved load except for cerium • Transformation of Atlantic Water accompanied by pronounced...
Published in: | Chemical Geology |
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2019
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Online Access: | https://oceanrep.geomar.de/id/eprint/44494/ https://oceanrep.geomar.de/id/eprint/44494/1/10.1016_j.chemgeo.2018.10.002.pdf https://oceanrep.geomar.de/id/eprint/44494/6/Laukert_et_al_2019.pdf https://doi.org/10.1016/j.chemgeo.2018.10.002 |
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ftoceanrep:oai:oceanrep.geomar.de:44494 2023-05-15T14:53:10+02:00 Water mass transformation in the Barents Sea inferred from radiogenic neodymium isotopes, rare earth elements and stable oxygen isotopes Laukert, Georgi Makhotin, Mikhail Petrova, Mariia V. Frank, Martin Hathorne, Ed C. Bauch, Dorothea Böning, Philipp Kassens, Heidemarie 2019-04-20 text https://oceanrep.geomar.de/id/eprint/44494/ https://oceanrep.geomar.de/id/eprint/44494/1/10.1016_j.chemgeo.2018.10.002.pdf https://oceanrep.geomar.de/id/eprint/44494/6/Laukert_et_al_2019.pdf https://doi.org/10.1016/j.chemgeo.2018.10.002 en eng Elsevier https://oceanrep.geomar.de/id/eprint/44494/1/10.1016_j.chemgeo.2018.10.002.pdf https://oceanrep.geomar.de/id/eprint/44494/6/Laukert_et_al_2019.pdf Laukert, G. , Makhotin, M., Petrova, M. V., Frank, M. , Hathorne, E. C. , Bauch, D. , Böning, P. and Kassens, H. (2019) Water mass transformation in the Barents Sea inferred from radiogenic neodymium isotopes, rare earth elements and stable oxygen isotopes. Open Access Chemical Geology, 511 . pp. 416-430. DOI 10.1016/j.chemgeo.2018.10.002 <https://doi.org/10.1016/j.chemgeo.2018.10.002>. doi:10.1016/j.chemgeo.2018.10.002 info:eu-repo/semantics/openAccess Article PeerReviewed 2019 ftoceanrep https://doi.org/10.1016/j.chemgeo.2018.10.002 2023-04-07T15:41:35Z Highlights • First comprehensive seawater Nd isotope and REE data set for the Barents Sea • Water masses traced with Nd isotopes, salinity and stable oxygen isotopes • No release of particulate REEs to the dissolved load except for cerium • Transformation of Atlantic Water accompanied by pronounced REE removal from the dissolved phase Abstract Nearly half the inflow of warm and saline Atlantic Water (AW) to the Arctic Ocean is substantially cooled and freshened in the Barents Sea, which is therefore considered a key region for water mass transformation in the Arctic Mediterranean. Numerous studies have focused on this transformation and the increasing influence of AW on Arctic climate and biodiversity, yet geochemical investigations of these processes have been scarce. Using the first comprehensive data set of the distributions of dissolved radiogenic neodymium (Nd) isotopes (expressed as ɛNd), rare earth elements (REE) and stable oxygen isotope (δ18O) compositions from this region we are able to constrain the transport and transformation of AW in the Barents Sea and to investigate which processes change the chemical composition of the water masses beyond what is expected from circulation and mixing. Inflowing AW and Norwegian Coastal Water (NCW) both exhibit distinctly unradiogenic ɛNd signatures of −12.4 and −14.5, respectively, whereas cold and dense Polar Water (PW) has considerably more radiogenic ɛNd signatures reaching up to −8.1. Locally formed Barents Sea Atlantic Water (BSAW) and Barents Sea Arctic Atlantic Water (BSAAW) are encountered in the northeastern Barents Sea and have intermediate ɛNd values resulting from admixture of PW containing small amounts of riverine freshwater from the Ob (<~1.1%) to AW and NCW. Similar to the Laptev Sea, the dissolved Nd isotope composition in the Barents Sea seems to be mainly controlled by water mass advection and mixing despite its shallow water depth. Strikingly, the BSAW and BSAAW are marked by the lowest REE concentrations reaching 11 pmol/kg for Nd ([Nd]), ... Article in Journal/Newspaper Arctic Arctic Ocean Barents Sea laptev Laptev Sea OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Arctic Arctic Ocean Barents Sea Laptev Sea Chemical Geology 511 416 430 |
institution |
Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
Highlights • First comprehensive seawater Nd isotope and REE data set for the Barents Sea • Water masses traced with Nd isotopes, salinity and stable oxygen isotopes • No release of particulate REEs to the dissolved load except for cerium • Transformation of Atlantic Water accompanied by pronounced REE removal from the dissolved phase Abstract Nearly half the inflow of warm and saline Atlantic Water (AW) to the Arctic Ocean is substantially cooled and freshened in the Barents Sea, which is therefore considered a key region for water mass transformation in the Arctic Mediterranean. Numerous studies have focused on this transformation and the increasing influence of AW on Arctic climate and biodiversity, yet geochemical investigations of these processes have been scarce. Using the first comprehensive data set of the distributions of dissolved radiogenic neodymium (Nd) isotopes (expressed as ɛNd), rare earth elements (REE) and stable oxygen isotope (δ18O) compositions from this region we are able to constrain the transport and transformation of AW in the Barents Sea and to investigate which processes change the chemical composition of the water masses beyond what is expected from circulation and mixing. Inflowing AW and Norwegian Coastal Water (NCW) both exhibit distinctly unradiogenic ɛNd signatures of −12.4 and −14.5, respectively, whereas cold and dense Polar Water (PW) has considerably more radiogenic ɛNd signatures reaching up to −8.1. Locally formed Barents Sea Atlantic Water (BSAW) and Barents Sea Arctic Atlantic Water (BSAAW) are encountered in the northeastern Barents Sea and have intermediate ɛNd values resulting from admixture of PW containing small amounts of riverine freshwater from the Ob (<~1.1%) to AW and NCW. Similar to the Laptev Sea, the dissolved Nd isotope composition in the Barents Sea seems to be mainly controlled by water mass advection and mixing despite its shallow water depth. Strikingly, the BSAW and BSAAW are marked by the lowest REE concentrations reaching 11 pmol/kg for Nd ([Nd]), ... |
format |
Article in Journal/Newspaper |
author |
Laukert, Georgi Makhotin, Mikhail Petrova, Mariia V. Frank, Martin Hathorne, Ed C. Bauch, Dorothea Böning, Philipp Kassens, Heidemarie |
spellingShingle |
Laukert, Georgi Makhotin, Mikhail Petrova, Mariia V. Frank, Martin Hathorne, Ed C. Bauch, Dorothea Böning, Philipp Kassens, Heidemarie Water mass transformation in the Barents Sea inferred from radiogenic neodymium isotopes, rare earth elements and stable oxygen isotopes |
author_facet |
Laukert, Georgi Makhotin, Mikhail Petrova, Mariia V. Frank, Martin Hathorne, Ed C. Bauch, Dorothea Böning, Philipp Kassens, Heidemarie |
author_sort |
Laukert, Georgi |
title |
Water mass transformation in the Barents Sea inferred from radiogenic neodymium isotopes, rare earth elements and stable oxygen isotopes |
title_short |
Water mass transformation in the Barents Sea inferred from radiogenic neodymium isotopes, rare earth elements and stable oxygen isotopes |
title_full |
Water mass transformation in the Barents Sea inferred from radiogenic neodymium isotopes, rare earth elements and stable oxygen isotopes |
title_fullStr |
Water mass transformation in the Barents Sea inferred from radiogenic neodymium isotopes, rare earth elements and stable oxygen isotopes |
title_full_unstemmed |
Water mass transformation in the Barents Sea inferred from radiogenic neodymium isotopes, rare earth elements and stable oxygen isotopes |
title_sort |
water mass transformation in the barents sea inferred from radiogenic neodymium isotopes, rare earth elements and stable oxygen isotopes |
publisher |
Elsevier |
publishDate |
2019 |
url |
https://oceanrep.geomar.de/id/eprint/44494/ https://oceanrep.geomar.de/id/eprint/44494/1/10.1016_j.chemgeo.2018.10.002.pdf https://oceanrep.geomar.de/id/eprint/44494/6/Laukert_et_al_2019.pdf https://doi.org/10.1016/j.chemgeo.2018.10.002 |
geographic |
Arctic Arctic Ocean Barents Sea Laptev Sea |
geographic_facet |
Arctic Arctic Ocean Barents Sea Laptev Sea |
genre |
Arctic Arctic Ocean Barents Sea laptev Laptev Sea |
genre_facet |
Arctic Arctic Ocean Barents Sea laptev Laptev Sea |
op_relation |
https://oceanrep.geomar.de/id/eprint/44494/1/10.1016_j.chemgeo.2018.10.002.pdf https://oceanrep.geomar.de/id/eprint/44494/6/Laukert_et_al_2019.pdf Laukert, G. , Makhotin, M., Petrova, M. V., Frank, M. , Hathorne, E. C. , Bauch, D. , Böning, P. and Kassens, H. (2019) Water mass transformation in the Barents Sea inferred from radiogenic neodymium isotopes, rare earth elements and stable oxygen isotopes. Open Access Chemical Geology, 511 . pp. 416-430. DOI 10.1016/j.chemgeo.2018.10.002 <https://doi.org/10.1016/j.chemgeo.2018.10.002>. doi:10.1016/j.chemgeo.2018.10.002 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1016/j.chemgeo.2018.10.002 |
container_title |
Chemical Geology |
container_volume |
511 |
container_start_page |
416 |
op_container_end_page |
430 |
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1766324579119136768 |