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Titolo:
Stable lead isotopic ratios trace thermohaline circulation in the subarctic North Atlantic
Autore:
Veron, AJ; Church, TM; Rivera-Duarte, I; Flegal, AR;
Indirizzi:
Univncex Marseille 3, UMR CNRS 6635, CEREGE, F-13628 Aix En Provence 4, Fra Univ Aix Marseille 3 Aix En Provence France 4 628 Aix En Provence 4, Fra Univ Delaware, Coll Marine Studies, Newark, DE 19716 USA Univ Delaware Newark DE USA 19716 ll Marine Studies, Newark, DE 19716 USA USN, SPAWAR Sys Ctr, Envir Sci Div, San Diego, CA 92152 USA USN San DiegoCA USA 92152 ys Ctr, Envir Sci Div, San Diego, CA 92152 USA Univ Calif Santa Cruz, WIGS, Santa Cruz, CA 95064 USA Univ Calif Santa Cruz Santa Cruz CA USA 95064 S, Santa Cruz, CA 95064 USA
Titolo Testata:
DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY
fascicolo: 5, volume: 46, anno: 1999,
pagine: 919 - 935
SICI:
0967-0645(1999)46:5<919:SLIRTT>2.0.ZU;2-I
Fonte:
ISI
Lingua:
ENG
Soggetto:
GIBBS FRACTURE-ZONE; LABRADOR-SEA-WATER; PB-ISOTOPES; ANTHROPOGENIC LEAD; OVERFLOW WATER; OCEAN; EMISSIONS; AEROSOLS; METALS; CHARACTERIZE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Physical, Chemical & Earth Sciences
Citazioni:
38
Recensione:
Indirizzi per estratti:
Indirizzo: Veron, AJ Univ4,ix Marseille 3, UMR CNRS 6635, CEREGE, BP80, F-13628 Aix En Provence Univ Aix Marseille 3 BP80 Aix En Provence France 4 En Provence
Citazione:
A.J. Veron et al., "Stable lead isotopic ratios trace thermohaline circulation in the subarctic North Atlantic", DEEP-SEA II, 46(5), 1999, pp. 919-935

Abstract

Vertical profiles of lead concentrations in the subarctic North Atlantic attest to the predominance of anthropogenic lead inputs to those waters, while variations in their lead isotopic ratios (Pb-204:Pb-206:Pb-207: Pb-208) show the multiplicity of those industrial lead inputs, Spatial gradients inthe isotopic ratios are consistent with the thermohaline circulation of different water masses, which seemingly have relatively discrete isotopic signatures. These include characteristic Pb-206/Pb-207 ratios of the North Atlantic Drift (1.183-1.187), Iceland-Scotland Overflow Water (1.173-1.176), Denmark Straits Overflow Water (1.179-1.182), and Labrador Sea Water (1.190-1.120). Based on parallels between these initial isotopic data and T-S measurements, it is proposed that stable lead isotopic compositions may be employed as complementary tracers of the mixing of source waters in the Nordic seas, as they overflow the Iceland-Scotland Ridge and Denmark Strait, mixing into the Labrador Sea to form North Atlantic Deep Water. (C) 1999 Elsevier Science Ltd. All rights reserved.

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Documento generato il 30/10/20 alle ore 09:29:14