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Titolo:
RELIABILITY OF SALT MARSHES AS GEOCHEMICAL RECORDERS OF POLLUTION INPUT - A CASE-STUDY FROM CONTRASTING ESTUARIES IN SOUTHERN ENGLAND
Autore:
CUNDY AB; CROUDACE IW; THOMSON J; LEWIS JT;
Indirizzi:
BRUNEL UNIV,DEPT GEOG & EARTH SCI,BOROUGH RD LONDON TW7 5DU ENGLAND SOUTHAMPTON OCEANOG CTR SOUTHAMPTON SO14 3ZH HANTS ENGLAND
Titolo Testata:
Environmental science & technology
fascicolo: 4, volume: 31, anno: 1997,
pagine: 1093 - 1101
SICI:
0013-936X(1997)31:4<1093:ROSMAG>2.0.ZU;2-U
Fonte:
ISI
Lingua:
ENG
Soggetto:
STABLE LEAD ISOTOPES; SEVERN ESTUARY; COASTAL SEDIMENTS; SOUTHWESTERN UK; TRACE-METALS; RATIOS; ACCUMULATION; HISTORY; PB;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
48
Recensione:
Indirizzi per estratti:
Citazione:
A.B. Cundy et al., "RELIABILITY OF SALT MARSHES AS GEOCHEMICAL RECORDERS OF POLLUTION INPUT - A CASE-STUDY FROM CONTRASTING ESTUARIES IN SOUTHERN ENGLAND", Environmental science & technology, 31(4), 1997, pp. 1093-1101

Abstract

Temperate, mesotidal salt marshes are usually good ''geochemical recorders'' of pollutant input. Dated salt marsh cores from the Hamble, Itchen (Southampton Water), and Beaulieu estuaries (southern U.K.) are assessed. Sediments show clear labeling from effluents, which varies depending on their proximity to major urban or industrial areas. For elements where input is dominantly from a single source and periods of peak discharge are known (i.e., Cu, Cs-137, and (CO)-C-60), historical records of pollutant input can be reconstructed, provided redistribution through sediment mixing or early diagenetic processes is minimal. Where the pollutant has a range of sources (i.e., Pb) or where physical mixing in-estuary produces a time-integrated signal, it can prove extremely difficult to relate concentration depth profiles to discharge histories. Using concentration and stable Pb isotope data, the observed temporal input of Pb to these marshes is shown to reflects complex, mixed marine/atmospheric input from regional (automobile emission) and local (urban/industrial) sources. While general trends in pollutant loading may still be observed, it is extremely difficult to reconstruct accurately temporal trends in Pb input and sources of Ph in these estuaries using salt marsh records due to the importance of local, poorly-defined Pb sources and in-estuary mixing processes.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 07/07/20 alle ore 12:04:20