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Titolo:
USE OF STABLE LEAD ISOTOPES TO CHARACTERIZE THE SOURCES OF ANTHROPOGENIC LEAD IN NORTH-ATLANTIC SURFACE WATERS
Autore:
VERON AJ; CHURCH TM; PATTERSON CC; FLEGAL AR;
Indirizzi:
FAC SCI & TECH ST JEROME,URA 132,CASE 431 F-13397 MARSEILLE 20 FRANCE UNIV DELAWARE,COLL MARINE STUDIES NEWARK DE 19716 CALTECH,DIV GEOL & PLANETARY SCI PASADENA CA 91125 UNIV CALIF SANTA CRUZ,WIGS SANTA CRUZ CA 95064
Titolo Testata:
Geochimica et cosmochimica acta
fascicolo: 15, volume: 58, anno: 1994,
pagine: 3199 - 3206
SICI:
0016-7037(1994)58:15<3199:UOSLIT>2.0.ZU;2-J
Fonte:
ISI
Lingua:
ENG
Soggetto:
TRACE-METALS; PACIFIC; SEDIMENTS; AEROSOLS; OCEAN; THERMOCLINE; INDUSTRIAL; EMISSIONS; POLLUTION; RATIOS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
47
Recensione:
Indirizzi per estratti:
Citazione:
A.J. Veron et al., "USE OF STABLE LEAD ISOTOPES TO CHARACTERIZE THE SOURCES OF ANTHROPOGENIC LEAD IN NORTH-ATLANTIC SURFACE WATERS", Geochimica et cosmochimica acta, 58(15), 1994, pp. 3199-3206

Abstract

Stable lead isotopes are used to illustrate the impact of surface water circulation on dissolved lead distribution in North Atlantic surface waters during oligotrophic conditions. Using stable lead isotopic signatures from (1) the Sargasso Sea and (2) direct tropospheric deposition to the North Atlantic, we estimate that 10-40% of the lead accumulated in surface waters of the European Basin is transported from the western North Atlantic by the North Atlantic Current. South of 50 degrees N, lead appears to be primarily distributed by the Subtropical North Atlantic Gyre that extends well beyond the western basins to 30 degrees W in the North African Basin (at 30-40 degrees N). There are different lead isotopic signatures between the subtropical gyre to the Guiana and western Guinea Basins, which suggests that the Inter Tropical Convergence Zone acts as an efficient barrier limiting chemical exchanges between the gyre and the equatorial currents.

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Documento generato il 26/09/20 alle ore 05:38:11