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Titolo:
Four thousand years of atmospheric lead pollution in northern Europe: a summary from Swedish lake sediments
Autore:
Branvall, ML; Bindler, R; Emteryd, O; Renberg, I;
Indirizzi:
Umea Univ, Dept Ecol & Environm Sci, SE-90187 Umea, Sweden Umea Univ Umea Sweden SE-90187 col & Environm Sci, SE-90187 Umea, Sweden Swedish Univ Agr Sci, Dept Forest Ecol, SE-90183 Umea, Sweden Swedish UnivAgr Sci Umea Sweden SE-90183 st Ecol, SE-90183 Umea, Sweden
Titolo Testata:
JOURNAL OF PALEOLIMNOLOGY
fascicolo: 4, volume: 25, anno: 2001,
pagine: 421 - 435
SICI:
0921-2728(200105)25:4<421:FTYOAL>2.0.ZU;2-C
Fonte:
ISI
Lingua:
ENG
Soggetto:
PEAT BOG; ISOTOPIC COMPOSITION; GREENLAND ICE; UNITED-KINGDOM; JURA MOUNTAINS; PB; DEPOSITION; METALS; RATIOS; ROMAN;
Keywords:
lead; stable lead isotopes; varved lake sediments; annually-laminatedsediments; atmospheric deposition; pollution history;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
53
Recensione:
Indirizzi per estratti:
Indirizzo: Branvall, ML Umea Univ, Dept Ecol & Environm Sci, SE-90187 Umea, Sweden Umea Univ Umea Sweden SE-90187 m Sci, SE-90187 Umea, Sweden
Citazione:
M.L. Branvall et al., "Four thousand years of atmospheric lead pollution in northern Europe: a summary from Swedish lake sediments", J PALEOLIMN, 25(4), 2001, pp. 421-435

Abstract

This paper presents a large palaeolimnological study of the pre-industrialand industrial history of atmospheric lead pollution deposition in Sweden. Both lead concentrations and Pb-206/Pb-207 ratios have been analysed in 31lakes covering most of Sweden, plus one lake in north-west Russia. Four ofthe lakes have varved (annually-laminated) sediments. Isotope analysis is a sensitive and effective method to distinguish pollution lead from naturalcatchment lead and to detect early pollution influence, because the (2)06Pb/(2)07Pb ratio in unpolluted background sediments in Sweden was > 1.3, while that of lead from pollution, derived from ores and coal, was < 1.2. The sediments show a consistent picture of past temporal changes in atmosphericlead pollution. These changes include: the first traces of pollution 3,500-3,000 yrs ago; a pollution peak in Greek-Roman Times (about 0 AD); lower lead fall-out between 400 and 900 AD; a significant and permanent increase in atmospheric lead fall-out from about 1000 AD; an increase with the Industrial revolution; a major increase following World War II; the maximum peak in the 1970s; and decreasing fall-out over the last decades. The four varved sediments provide high-resolution records of atmospheric pollution. They reveal pollution peaks about 1200 and 1530 AD which match the history of metal production in Europe. According to the varve records the lead pollutionlevel in the late 1990s had decreased beneath the level of the 1530s. The pollution level 1200 AD was about 35% of the 1980s, when lead pollution wasstill near its all time high. About 50% of the total accumulated atmospheric lead pollution deposition through time was deposited in the pre-industrial period. The sediments also show a consistent picture of the geographic distribution of atmospheric lead deposition over time, with higher deposition in south Sweden and declining levels to the north, which supports the hypothesis that the main sources of pre-industrial atmospheric lead pollution in Sweden were cultural areas in mainland Europe and Great Britain.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 02/07/20 alle ore 22:22:34