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Titolo:
ANTHROPOGENIC LEAD IN ANTARCTIC SEA-WATER
Autore:
FLEGAL AR; MARING H; NIEMEYER S;
Indirizzi:
UNIV CALIF SANTA CRUZ,EARTH SCI BOARD SANTA CRUZ CA 95064 UNIV MIAMI,ROSENSTIEL SCH MARINE & ATMOSPHER SCI,DIV MARINE & ATMOSPHER CHEM MIAMI FL 33149 LAWRENCE LIVERMORE NATL LAB,DIV NUCL CHEM LIVERMORE CA 94550
Titolo Testata:
Nature
fascicolo: 6443, volume: 365, anno: 1993,
pagine: 242 - 244
SICI:
0028-0836(1993)365:6443<242:ALIAS>2.0.ZU;2-N
Fonte:
ISI
Lingua:
ENG
Soggetto:
WEDDELL SEA; CONTAMINATION; POLLUTION; CADMIUM; COPPER; COLUMN; FLUXES; METALS; SOILS; SNOW;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
26
Recensione:
Indirizzi per estratti:
Citazione:
A.R. Flegal et al., "ANTHROPOGENIC LEAD IN ANTARCTIC SEA-WATER", Nature, 365(6443), 1993, pp. 242-244

Abstract

ANTARCTICA is believed to be a relatively pristine continent, mainly because of its remote location and the atmospheric circulation patterns that limit the transport of industrial aerosols into the Antarctic polar cell1-4. This perception is apparently supported by the extremelylow concentrations of lead in Antarctic surface waters-an observationthat has been interpreted as showing insignificant contamination by anthropogenic lead5. The isotopic composition of lead in other natural waters has been used as a tracer of the sources of lead, and in particular to identify anthropogenic inputs6,7. Here we apply this approach to Antarctic surface waters, and show that despite the low concentrations of lead in these waters (which are confirmed by our measurements),their isotopic composition reveals a significant contribution of leadfrom industrial sources. The extremely low concentrations of lead in these waters appear to be due to biological scavenging of the lead during periods of intense primary production.

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Documento generato il 18/09/20 alle ore 18:20:31