Publication

Neodymium isotopic composition and concentration in the western North Atlantic Ocean: results from the GEOTRACES GA02 section

Lambelet, M., van de Flierdt, T., Crocket, K., Rehkämper, M., Kreissig, K., Coles, B., Rijkenberg, M., Gerringa, L. J. A., de Baar, H. & Steinfeldt, R., 15-Mar-2016, In : Geochimica et Cosmochimica Acta. 177, p. 1-29

Research output: Contribution to journalArticleAcademicpeer-review

APA

Lambelet, M., van de Flierdt, T., Crocket, K., Rehkämper, M., Kreissig, K., Coles, B., ... Steinfeldt, R. (2016). Neodymium isotopic composition and concentration in the western North Atlantic Ocean: results from the GEOTRACES GA02 section. Geochimica et Cosmochimica Acta, 177, 1-29. https://doi.org/10.1016/j.gca.2015.12.019

Author

Lambelet, Myriam ; van de Flierdt, Tina ; Crocket, Kirtsty ; Rehkämper, Mark ; Kreissig, Katharina ; Coles, Barry ; Rijkenberg, Michaël ; Gerringa, Loes J.A. ; de Baar, Henricus ; Steinfeldt, Reiner. / Neodymium isotopic composition and concentration in the western North Atlantic Ocean : results from the GEOTRACES GA02 section. In: Geochimica et Cosmochimica Acta. 2016 ; Vol. 177. pp. 1-29.

Harvard

Lambelet, M, van de Flierdt, T, Crocket, K, Rehkämper, M, Kreissig, K, Coles, B, Rijkenberg, M, Gerringa, LJA, de Baar, H & Steinfeldt, R 2016, 'Neodymium isotopic composition and concentration in the western North Atlantic Ocean: results from the GEOTRACES GA02 section', Geochimica et Cosmochimica Acta, vol. 177, pp. 1-29. https://doi.org/10.1016/j.gca.2015.12.019

Standard

Neodymium isotopic composition and concentration in the western North Atlantic Ocean : results from the GEOTRACES GA02 section. / Lambelet, Myriam; van de Flierdt, Tina; Crocket, Kirtsty; Rehkämper, Mark; Kreissig, Katharina; Coles, Barry; Rijkenberg, Michaël; Gerringa, Loes J.A.; de Baar, Henricus; Steinfeldt, Reiner.

In: Geochimica et Cosmochimica Acta, Vol. 177, 15.03.2016, p. 1-29.

Research output: Contribution to journalArticleAcademicpeer-review

Vancouver

Lambelet M, van de Flierdt T, Crocket K, Rehkämper M, Kreissig K, Coles B et al. Neodymium isotopic composition and concentration in the western North Atlantic Ocean: results from the GEOTRACES GA02 section. Geochimica et Cosmochimica Acta. 2016 Mar 15;177:1-29. https://doi.org/10.1016/j.gca.2015.12.019


BibTeX

@article{7d2257789d1241189a719319dfee233d,
title = "Neodymium isotopic composition and concentration in the western North Atlantic Ocean: results from the GEOTRACES GA02 section",
abstract = "The neodymium (Nd) isotopic composition of seawater is commonly used as a proxy to study past changes in the thermohaline circulation. The modern database for such reconstructions is however poor and the understanding of the underlying processes is incomplete. Here we present new observational data for Nd isotopes and concentrations from twelve seawater depth profiles, which follow the flow path of North Atlantic Deep Water (NADW) from its formation region in the North Atlantic to the northern equatorial Atlantic. Samples were collected during two cruises constituting the northern part of the Dutch GEOTRACES transect GA02 in 2010. The results show that the different water masses in the subpolar North Atlantic Ocean, which ultimately constitute NADW, have the following Nd isotope characteristics: Upper Labrador Sea Water (ULSW), εNd = −14.2 ± 0.3; Labrador Sea Water (LSW), εNd = −13.7 ± 0.9; Northeast Atlantic Deep Water (NEADW), εNd = −12.5 ± 0.6; Northwest Atlantic Bottom Water (NWABW), εNd = −11.8 ± 1.4. In the subtropics, where these source water masses have mixed to form NADW, which is exported to the global ocean, upper-NADW is characterised by εNd values of −13.2 ± 1.0 (2sd) and lower-NADW exhibits values of εNd = −12.4 ± 0.4 (2sd). While both signatures overlap within error, the signature for lower-NADW is significantly more radiogenic than the traditionally used value for NADW (εNd = −13.5) due to the dominance of source waters from the Nordic Seas (NWABW and NEADW). Comparison between the concentration profiles and the corresponding Nd isotope profiles with other water mass properties such as salinity, silicate concentrations, neutral densities and chlorofluorocarbon (CFC) concentration provides novel insights into the geochemical cycle of Nd and reveals that different processes are necessary to account for the observed Nd characteristics in the subpolar and subtropical gyres and throughout the vertical water column. While our data set provides additional insights into the contribution of boundary exchange in areas of sediment resuspension, the results for open ocean seawater demonstrate, at an unprecedented level, the suitability of Nd isotopes to trace modern water masses in the strongly advecting western Atlantic Ocean.",
keywords = "Neodymium isotopic",
author = "Myriam Lambelet and {van de Flierdt}, Tina and Kirtsty Crocket and Mark Rehk{\"a}mper and Katharina Kreissig and Barry Coles and Micha{\"e}l Rijkenberg and Gerringa, {Loes J.A.} and {de Baar}, Henricus and Reiner Steinfeldt",
year = "2016",
month = "3",
day = "15",
doi = "10.1016/j.gca.2015.12.019",
language = "English",
volume = "177",
pages = "1--29",
journal = "Geochimica et Cosmochimica Acta",
issn = "0016-7037",
publisher = "PERGAMON-ELSEVIER SCIENCE LTD",

}

RIS

TY - JOUR

T1 - Neodymium isotopic composition and concentration in the western North Atlantic Ocean

T2 - results from the GEOTRACES GA02 section

AU - Lambelet, Myriam

AU - van de Flierdt, Tina

AU - Crocket, Kirtsty

AU - Rehkämper, Mark

AU - Kreissig, Katharina

AU - Coles, Barry

AU - Rijkenberg, Michaël

AU - Gerringa, Loes J.A.

AU - de Baar, Henricus

AU - Steinfeldt, Reiner

PY - 2016/3/15

Y1 - 2016/3/15

N2 - The neodymium (Nd) isotopic composition of seawater is commonly used as a proxy to study past changes in the thermohaline circulation. The modern database for such reconstructions is however poor and the understanding of the underlying processes is incomplete. Here we present new observational data for Nd isotopes and concentrations from twelve seawater depth profiles, which follow the flow path of North Atlantic Deep Water (NADW) from its formation region in the North Atlantic to the northern equatorial Atlantic. Samples were collected during two cruises constituting the northern part of the Dutch GEOTRACES transect GA02 in 2010. The results show that the different water masses in the subpolar North Atlantic Ocean, which ultimately constitute NADW, have the following Nd isotope characteristics: Upper Labrador Sea Water (ULSW), εNd = −14.2 ± 0.3; Labrador Sea Water (LSW), εNd = −13.7 ± 0.9; Northeast Atlantic Deep Water (NEADW), εNd = −12.5 ± 0.6; Northwest Atlantic Bottom Water (NWABW), εNd = −11.8 ± 1.4. In the subtropics, where these source water masses have mixed to form NADW, which is exported to the global ocean, upper-NADW is characterised by εNd values of −13.2 ± 1.0 (2sd) and lower-NADW exhibits values of εNd = −12.4 ± 0.4 (2sd). While both signatures overlap within error, the signature for lower-NADW is significantly more radiogenic than the traditionally used value for NADW (εNd = −13.5) due to the dominance of source waters from the Nordic Seas (NWABW and NEADW). Comparison between the concentration profiles and the corresponding Nd isotope profiles with other water mass properties such as salinity, silicate concentrations, neutral densities and chlorofluorocarbon (CFC) concentration provides novel insights into the geochemical cycle of Nd and reveals that different processes are necessary to account for the observed Nd characteristics in the subpolar and subtropical gyres and throughout the vertical water column. While our data set provides additional insights into the contribution of boundary exchange in areas of sediment resuspension, the results for open ocean seawater demonstrate, at an unprecedented level, the suitability of Nd isotopes to trace modern water masses in the strongly advecting western Atlantic Ocean.

AB - The neodymium (Nd) isotopic composition of seawater is commonly used as a proxy to study past changes in the thermohaline circulation. The modern database for such reconstructions is however poor and the understanding of the underlying processes is incomplete. Here we present new observational data for Nd isotopes and concentrations from twelve seawater depth profiles, which follow the flow path of North Atlantic Deep Water (NADW) from its formation region in the North Atlantic to the northern equatorial Atlantic. Samples were collected during two cruises constituting the northern part of the Dutch GEOTRACES transect GA02 in 2010. The results show that the different water masses in the subpolar North Atlantic Ocean, which ultimately constitute NADW, have the following Nd isotope characteristics: Upper Labrador Sea Water (ULSW), εNd = −14.2 ± 0.3; Labrador Sea Water (LSW), εNd = −13.7 ± 0.9; Northeast Atlantic Deep Water (NEADW), εNd = −12.5 ± 0.6; Northwest Atlantic Bottom Water (NWABW), εNd = −11.8 ± 1.4. In the subtropics, where these source water masses have mixed to form NADW, which is exported to the global ocean, upper-NADW is characterised by εNd values of −13.2 ± 1.0 (2sd) and lower-NADW exhibits values of εNd = −12.4 ± 0.4 (2sd). While both signatures overlap within error, the signature for lower-NADW is significantly more radiogenic than the traditionally used value for NADW (εNd = −13.5) due to the dominance of source waters from the Nordic Seas (NWABW and NEADW). Comparison between the concentration profiles and the corresponding Nd isotope profiles with other water mass properties such as salinity, silicate concentrations, neutral densities and chlorofluorocarbon (CFC) concentration provides novel insights into the geochemical cycle of Nd and reveals that different processes are necessary to account for the observed Nd characteristics in the subpolar and subtropical gyres and throughout the vertical water column. While our data set provides additional insights into the contribution of boundary exchange in areas of sediment resuspension, the results for open ocean seawater demonstrate, at an unprecedented level, the suitability of Nd isotopes to trace modern water masses in the strongly advecting western Atlantic Ocean.

KW - Neodymium isotopic

U2 - 10.1016/j.gca.2015.12.019

DO - 10.1016/j.gca.2015.12.019

M3 - Article

VL - 177

SP - 1

EP - 29

JO - Geochimica et Cosmochimica Acta

JF - Geochimica et Cosmochimica Acta

SN - 0016-7037

ER -

ID: 30486636