Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Holocene climatic change reconstructed from diatoms, chironomids, pollen and near-infrared spectroscopy at an alpine lake (Sjuodjljaure) in northern Sweden
Autore:
Rosen, P; Segerstrom, U; Eriksson, L; Renberg, I; Birks, HJB;
Indirizzi:
Umea Univ, Dept Ecol & Environm Sci, SE-90187 Umea, Sweden Umea Univ Umea Sweden SE-90187 col & Environm Sci, SE-90187 Umea, Sweden Abisko Sci Res Stn, Climate Impacts Res Ctr, SE-98107 Abisko, Sweden Abisko Sci Res Stn Abisko Sweden SE-98107 s Ctr, SE-98107 Abisko, Sweden Swedish Univ Agr Sci, Dept Forest Vegetat Ecol, SE-90183 Umea, Sweden Swedish Univ Agr Sci Umea Sweden SE-90183 at Ecol, SE-90183 Umea, Sweden Swedish Univ Agr Sci, Dept Environm Assessment, SE-75007 Uppsala, Sweden Swedish Univ Agr Sci Uppsala Sweden SE-75007 t, SE-75007 Uppsala, Sweden Univ Bergen, Inst Bot, N-5007 Bergen, Norway Univ Bergen Bergen Norway N-5007 Bergen, Inst Bot, N-5007 Bergen, Norway Univ Coll London, Environm Change Res Ctr, London WC1H OAP, England Univ Coll London London England WC1H OAP s Ctr, London WC1H OAP, England
Titolo Testata:
HOLOCENE
fascicolo: 5, volume: 11, anno: 2001,
pagine: 551 - 562
SICI:
0959-6836(2001)11:5<551:HCCRFD>2.0.ZU;2-Q
Fonte:
ISI
Lingua:
ENG
Soggetto:
QUANTITATIVE INDICATORS; REFLECTANCE SPECTROSCOPY; WESTERN NORWAY; ABISKO AREA; SEDIMENTS; TEMPERATURES; PH; FENNOSCANDIA; CALIBRATION; ASSEMBLAGES;
Keywords:
Holocene climate; lake sediments; northern Sweden; pollen; chironomid; diatom; near-infrared spectroscopy;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
90
Recensione:
Indirizzi per estratti:
Indirizzo: Rosen, P Umea Univ, Dept Ecol & Environm Sci, SE-90187 Umea, Sweden Umea Univ Umea Sweden SE-90187 ironm Sci, SE-90187 Umea, Sweden
Citazione:
P. Rosen et al., "Holocene climatic change reconstructed from diatoms, chironomids, pollen and near-infrared spectroscopy at an alpine lake (Sjuodjljaure) in northern Sweden", HOLOCENE, 11(5), 2001, pp. 551-562

Abstract

The results of a multiproxy study reconstructing the climate history of the last 9300 years in northern Sweden are presented. It is based on diatom, chironomid and pollen analyses, as well as near-infrared spectroscopy (NIRS), of a radiocarbon dated sediment core from Sjuodjijaure (67 degrees 22'N,18 degrees 04'E), situated 100 m above tree-line in the Scandes mountains. Mean July air temperature was reconstructed using transfer functions established for the region. The biological proxies show significant changes in composition during the Holocene and the inferred temperatures all follow thesame general trend. For the period between about 9300 to 7300 cal. BP the reconstructions should be interpreted with caution due to the lack of convincing modem analogues in the training set. However the reconstruction suggest that July temperature was on average about the same as today, with several rapid short-term cold and warm periods. Cold periods were dated to about8500, 8200 and 7600 cal. years BP and a warm period to about 7700 cal. BP. About 7300 cal. BP, a major shift to a warmer climate occurred. Pine migrated into the area, which was previously covered with birch forest. From themid-Holocene until today the sediment record suggests a descending tree-limit and a gradual lowering of July temperature.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 08/04/20 alle ore 09:00:07