Imperial College London

DrYvesPlancherel

Faculty of Natural SciencesThe Grantham Institute for Climate Change

Lecturer in Climate Change and the Environment
 
 
 
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Contact

 

+44 (0)20 7594 1034y.plancherel

 
 
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Location

 

Sherfield BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Tachikawa:2017:10.1016/j.chemgeo.2017.03.018,
author = {Tachikawa, K and Arsouze, T and Bayon, G and Bory, A and Colin, C and Dutay, J-C and Frank, N and Giraud, X and Gourlan, AT and Jeandel, C and Lacan, F and Meynadier, L and Montagna, P and Piotrowski, AM and Plancherel, Y and Puceat, E and Roy-Barman, M and Waelbroeck, C},
doi = {10.1016/j.chemgeo.2017.03.018},
journal = {Chemical Geology},
pages = {131--148},
title = {The large-scale evolution of neodymium isotopic composition in the global modern and Holocene ocean revealed from seawater and archive data},
url = {http://dx.doi.org/10.1016/j.chemgeo.2017.03.018},
volume = {457},
year = {2017}
}

RIS format (EndNote, RefMan)

TY  - JOUR
AB - Neodymium isotopic compositions (143Nd/144Nd or εNd) have been used as a tracer of water masses and lithogenic inputs to the ocean. To further evaluate the faithfulness of this tracer, we have updated a global seawater εNd database and combined it with hydrography parameters (temperature, salinity, nutrients and oxygen concentrations), carbon isotopic ratio and radiocarbon of dissolved inorganic carbon. Archive εNd data are also compiled for leachates, foraminiferal tests, deep-sea corals and fish teeth/debris from the Holocene period (< 10,000 years).At water depths ≥ 1500 m, property-property plots show clear correlations between seawater εNd and the other variables, suggesting that large-scale water mass mixing is a primary control of deepwater εNd distribution. At ≥ 200 m, basin-scale seawater T-S-εNd diagrams demonstrate the isotopic evolution of different water masses. Seawater and archive εNd values are compared using property-property plots and T-S-εNd diagrams. Archive values generally agree with corresponding seawater values although they tend to be at the upper limit in the Pacific. Both positive and negative offsets exist in the northern North Atlantic. Applying multiple regression analysis to deep (≥ 1500 m) seawater data, we established empirical equations that predict the main, large-scale, deepwater εNd trends from hydrography parameters. Large offsets from the predicted values are interpreted as a sign of significant local/regional influence. Dominant continental influence on seawater and archive εNd is observed mainly within 1000 km from the continents. Generally, seawater and archive εNd values form gradual latitudinal trend in the Atlantic and Pacific at depths ≥ 600 m, consistent with the idea that Nd isotopes help distinguish between northern/southern sourced water contributions at intermediate and deep water depths.
AU - Tachikawa,K
AU - Arsouze,T
AU - Bayon,G
AU - Bory,A
AU - Colin,C
AU - Dutay,J-C
AU - Frank,N
AU - Giraud,X
AU - Gourlan,AT
AU - Jeandel,C
AU - Lacan,F
AU - Meynadier,L
AU - Montagna,P
AU - Piotrowski,AM
AU - Plancherel,Y
AU - Puceat,E
AU - Roy-Barman,M
AU - Waelbroeck,C
DO - 10.1016/j.chemgeo.2017.03.018
EP - 148
PY - 2017///
SN - 0009-2541
SP - 131
TI - The large-scale evolution of neodymium isotopic composition in the global modern and Holocene ocean revealed from seawater and archive data
T2 - Chemical Geology
UR - http://dx.doi.org/10.1016/j.chemgeo.2017.03.018
UR - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000403516900012&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR - http://hdl.handle.net/10044/1/60859
VL - 457
ER -