The distribution of neodymium isotopes in Arctic Ocean basins
Nd concentration and isotope data have been obtained for the Canada, Amundsen, and Makarov Basins of the Arctic Ocean. A pattern of high Nd concentrations (up to 58 pM) at shallow depths is seen throughout the Arctic, and is distinct from that generally seen in other oceans where surface waters are...
Published in: | Geochimica et Cosmochimica Acta |
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Online Access: | https://oceanrep.geomar.de/id/eprint/7578/ https://oceanrep.geomar.de/id/eprint/7578/1/671_Porcelli_2009_TheDistributionOfNdIsotopes_Artzeit_pubid12030.pdf https://doi.org/10.1016/j.gca.2008.11.046 |
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ftoceanrep:oai:oceanrep.geomar.de:7578 2023-05-15T14:25:52+02:00 The distribution of neodymium isotopes in Arctic Ocean basins Porcelli, D. Andersson, P. S. Baskaran, M. Frank, Martin Björk, G. Semiletov, I. 2009 text https://oceanrep.geomar.de/id/eprint/7578/ https://oceanrep.geomar.de/id/eprint/7578/1/671_Porcelli_2009_TheDistributionOfNdIsotopes_Artzeit_pubid12030.pdf https://doi.org/10.1016/j.gca.2008.11.046 en eng Elsevier https://oceanrep.geomar.de/id/eprint/7578/1/671_Porcelli_2009_TheDistributionOfNdIsotopes_Artzeit_pubid12030.pdf Porcelli, D., Andersson, P. S., Baskaran, M., Frank, M. , Björk, G. and Semiletov, I. (2009) The distribution of neodymium isotopes in Arctic Ocean basins. Geochimica et Cosmochimica Acta, 73 . pp. 2645-2659. DOI 10.1016/j.gca.2008.11.046 <https://doi.org/10.1016/j.gca.2008.11.046>. doi:10.1016/j.gca.2008.11.046 info:eu-repo/semantics/restrictedAccess Article PeerReviewed 2009 ftoceanrep https://doi.org/10.1016/j.gca.2008.11.046 2023-04-07T14:55:10Z Nd concentration and isotope data have been obtained for the Canada, Amundsen, and Makarov Basins of the Arctic Ocean. A pattern of high Nd concentrations (up to 58 pM) at shallow depths is seen throughout the Arctic, and is distinct from that generally seen in other oceans where surface waters are relatively depleted. A range of isotopic variations across the Arctic and within individual depth profiles reflects the different sources of waters. The dominant source of water, and so Nd, is the Atlantic Ocean, with lesser contributions from the Pacific and Arctic Rivers. Radiogenic isotope Nd signatures (up to epsilon(Nd) = -6.5) can be traced in Pacific water flowing into the Canada Basin. Waters from rivers draining older terrains provide very unradiogenic Nd (down to epsilon(Nd) = -14.2) that can be traced in surface waters across much of the Eurasian Basin. A distinct feature of the Arctic is the general influence of the shelves on the Nd concentrations of waters flowing into the basins, either from the Pacific across the Chukchi Sea, or from across the extensive Siberian shelves. Water-shelf interaction results in an increase in Nd concentration without significant changes in salinity in essentially all waters in the Arctic, through processes that are not yet well understood. In estuarine regions other processes modify the Nd signal of freshwater components supplied into the Arctic Basin, and possibly also contribute to sedimentary Nd that may be subsequently involved in sediment-water interactions. Mixing relationships indicate that in estuaries, Nd is removed from major river waters to different degrees. Deep waters in the Arctic are higher in Nd than the inflowing Atlantic waters, apparently through enrichments of waters on the shelves that are involved in ventilating the deep basins. These enrichments generally have not resulted in major shifts in the isotopic compositions of the deep waters in the Makarov Basin (epsilon(Nd) similar to -10.5), but have created distinctive Nd isotope signatures that were ... Article in Journal/Newspaper Arctic Arctic Basin Arctic Arctic Ocean canada basin Chukchi Chukchi Sea makarov basin OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Arctic Arctic Ocean Canada Chukchi Sea Makarov Basin ENVELOPE(170.000,170.000,87.000,87.000) Pacific Geochimica et Cosmochimica Acta 73 9 2645 2659 |
institution |
Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
Nd concentration and isotope data have been obtained for the Canada, Amundsen, and Makarov Basins of the Arctic Ocean. A pattern of high Nd concentrations (up to 58 pM) at shallow depths is seen throughout the Arctic, and is distinct from that generally seen in other oceans where surface waters are relatively depleted. A range of isotopic variations across the Arctic and within individual depth profiles reflects the different sources of waters. The dominant source of water, and so Nd, is the Atlantic Ocean, with lesser contributions from the Pacific and Arctic Rivers. Radiogenic isotope Nd signatures (up to epsilon(Nd) = -6.5) can be traced in Pacific water flowing into the Canada Basin. Waters from rivers draining older terrains provide very unradiogenic Nd (down to epsilon(Nd) = -14.2) that can be traced in surface waters across much of the Eurasian Basin. A distinct feature of the Arctic is the general influence of the shelves on the Nd concentrations of waters flowing into the basins, either from the Pacific across the Chukchi Sea, or from across the extensive Siberian shelves. Water-shelf interaction results in an increase in Nd concentration without significant changes in salinity in essentially all waters in the Arctic, through processes that are not yet well understood. In estuarine regions other processes modify the Nd signal of freshwater components supplied into the Arctic Basin, and possibly also contribute to sedimentary Nd that may be subsequently involved in sediment-water interactions. Mixing relationships indicate that in estuaries, Nd is removed from major river waters to different degrees. Deep waters in the Arctic are higher in Nd than the inflowing Atlantic waters, apparently through enrichments of waters on the shelves that are involved in ventilating the deep basins. These enrichments generally have not resulted in major shifts in the isotopic compositions of the deep waters in the Makarov Basin (epsilon(Nd) similar to -10.5), but have created distinctive Nd isotope signatures that were ... |
format |
Article in Journal/Newspaper |
author |
Porcelli, D. Andersson, P. S. Baskaran, M. Frank, Martin Björk, G. Semiletov, I. |
spellingShingle |
Porcelli, D. Andersson, P. S. Baskaran, M. Frank, Martin Björk, G. Semiletov, I. The distribution of neodymium isotopes in Arctic Ocean basins |
author_facet |
Porcelli, D. Andersson, P. S. Baskaran, M. Frank, Martin Björk, G. Semiletov, I. |
author_sort |
Porcelli, D. |
title |
The distribution of neodymium isotopes in Arctic Ocean basins |
title_short |
The distribution of neodymium isotopes in Arctic Ocean basins |
title_full |
The distribution of neodymium isotopes in Arctic Ocean basins |
title_fullStr |
The distribution of neodymium isotopes in Arctic Ocean basins |
title_full_unstemmed |
The distribution of neodymium isotopes in Arctic Ocean basins |
title_sort |
distribution of neodymium isotopes in arctic ocean basins |
publisher |
Elsevier |
publishDate |
2009 |
url |
https://oceanrep.geomar.de/id/eprint/7578/ https://oceanrep.geomar.de/id/eprint/7578/1/671_Porcelli_2009_TheDistributionOfNdIsotopes_Artzeit_pubid12030.pdf https://doi.org/10.1016/j.gca.2008.11.046 |
long_lat |
ENVELOPE(170.000,170.000,87.000,87.000) |
geographic |
Arctic Arctic Ocean Canada Chukchi Sea Makarov Basin Pacific |
geographic_facet |
Arctic Arctic Ocean Canada Chukchi Sea Makarov Basin Pacific |
genre |
Arctic Arctic Basin Arctic Arctic Ocean canada basin Chukchi Chukchi Sea makarov basin |
genre_facet |
Arctic Arctic Basin Arctic Arctic Ocean canada basin Chukchi Chukchi Sea makarov basin |
op_relation |
https://oceanrep.geomar.de/id/eprint/7578/1/671_Porcelli_2009_TheDistributionOfNdIsotopes_Artzeit_pubid12030.pdf Porcelli, D., Andersson, P. S., Baskaran, M., Frank, M. , Björk, G. and Semiletov, I. (2009) The distribution of neodymium isotopes in Arctic Ocean basins. Geochimica et Cosmochimica Acta, 73 . pp. 2645-2659. DOI 10.1016/j.gca.2008.11.046 <https://doi.org/10.1016/j.gca.2008.11.046>. doi:10.1016/j.gca.2008.11.046 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1016/j.gca.2008.11.046 |
container_title |
Geochimica et Cosmochimica Acta |
container_volume |
73 |
container_issue |
9 |
container_start_page |
2645 |
op_container_end_page |
2659 |
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1766298345251274752 |