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Titolo:
Palaeolimnological evidence for marked Holocene environmental changes on Signy Island, Antarctica
Autore:
Jones, VJ; Hodgson, DA; Chepstow-Lusty, A;
Indirizzi:
Univ Coll London, Dept Geog, Environm Change Res Ctr, London WC1H 0AP, England Univ Coll London London England WC1H 0AP s Ctr, London WC1H 0AP, England British Antarctic Survey, Cambridge CB3 0ET, England British Antarctic Survey Cambridge England CB3 0ET idge CB3 0ET, England Univ Cambridge, Dept Geog, Cambridge CB2 3EN, England Univ Cambridge Cambridge England CB2 3EN eog, Cambridge CB2 3EN, England
Titolo Testata:
HOLOCENE
fascicolo: 1, volume: 10, anno: 2000,
pagine: 43 - 60
SICI:
0959-6836(200001)10:1<43:PEFMHE>2.0.ZU;2-5
Fonte:
ISI
Lingua:
ENG
Soggetto:
QUATERNARY GLACIAL HISTORY; SOUTH-SHETLAND-ISLANDS; KING-GEORGE-ISLAND; JAMES-ROSS-ISLAND; DIATOM ASSEMBLAGES; LAKE-SEDIMENTS; CLIMATIC-CHANGE; PENINSULA; SEA; LEVEL;
Keywords:
Antarctic; Signy Island; Holocene; climate change; palaeolimnology; palaeoclimate;
Tipo documento:
Review
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
105
Recensione:
Indirizzi per estratti:
Indirizzo: Jones, VJ Univ Coll London, Dept Geog, Environm Change Res Ctr, 26 BedfordWay, London WC1H 0AP, England Univ Coll London 26 Bedford Way London England WC1H 0AP England
Citazione:
V.J. Jones et al., "Palaeolimnological evidence for marked Holocene environmental changes on Signy Island, Antarctica", HOLOCENE, 10(1), 2000, pp. 43-60

Abstract

Lake-sediment cores from Heywood and Sombre Lakes on Signy Island (South Orkney Islands), Antarctica, have yielded a conformable radiacarbon chronology far the Holocene and a high-resolution record of environmental change. The lakes share a common climate and geology but have distinct catchments. This provides an opportunity for using lake sediments to differentiate between local, within lake/catchment, events and those at a regional scale. Analyses of various biological and physical remains from the lakes suggest thatboth catchments have undergone considerable changes during the last 5700 years. Macrofossils (moss and crustacean remains) are more abundant in the late Holocene, being associated with a period of high sediment accumulation,which is related to diatom evidence for more nutrient-rich conditions at the sites. This is interpreted as a response to a Holocene 'climate optimum'at c. 3800-1300 C-14 yr BP. The record is consistent with other lake, ice and ocean core studies, although the climate optimum appears to have persisted for a longer period at Signy Island.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 28/03/20 alle ore 14:03:15