Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Vegetation and paleoclimate of the last interglacial period, central Alaska
Autore:
Muhs, DR; Ager, TA; Beget, JE;
Indirizzi:
US Geol Survey, Denver Fed Ctr, Denver, CO 80225 USA US Geol Survey Denver CO USA 80225 , Denver Fed Ctr, Denver, CO 80225 USA Univ Alaska, Dept Geol & Geophys, Fairbanks, AK 99775 USA Univ Alaska Fairbanks AK USA 99775 eol & Geophys, Fairbanks, AK 99775 USA
Titolo Testata:
QUATERNARY SCIENCE REVIEWS
fascicolo: 1-3, volume: 20, anno: 2001,
pagine: 41 - 61
SICI:
0277-3791(200101)20:1-3<41:VAPOTL>2.0.ZU;2-9
Fonte:
ISI
Lingua:
ENG
Soggetto:
OLD CROW TEPHRA; SOUTH-CENTRAL ALASKA; URANIUM-SERIES AGES; FISSION-TRACK AGES; VOSTOK ICE-CORE; INTERIOR ALASKA; SEA-LEVEL; SOIL DEVELOPMENT; YUKON-TERRITORY; NATIONAL-PARK;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
99
Recensione:
Indirizzi per estratti:
Indirizzo: Muhs, DR US Geol Survey, Denver Fed Ctr, Box 25046,MS 980, Denver, CO 80225 USA US Geol Survey Box 25046,MS 980 Denver CO USA 80225 CO 80225 USA
Citazione:
D.R. Muhs et al., "Vegetation and paleoclimate of the last interglacial period, central Alaska", QUAT SCI R, 20(1-3), 2001, pp. 41-61

Abstract

The last interglacial period is thought to be the last time global climatewas significantly warmer than present. New stratigraphic studies at Eva Creek, near Fairbanks, Alaska indicate a complex last interglacial record wherein periods of loess deposition alternated with periods of soil formation. The Eva Forest Bed appears to have formed about the time of or after deposition of the Old Crow tephra (dated to similar to 160 to similar to 120 ka), and is therefore correlated with the last interglacial period. Pollen, macrofossils, and soils from the Eva Forest Bed indicate that boreal forest was the dominant vegetation and precipitation may have been greater than present around Fairbanks during the peak of the last interglacial period. A new compilation of last interglacial localities indicates that boreal forest was extensive over interior Alaska and Yukon Territory. Boreal forest also extended beyond its present range onto the Seward and Baldwin Peninsulas, and probably migrated to higher elevations, now occupied by tundra, in the interior. Comparison of last interglacial pollen and macrofossil data with atmospheric general circulation model results shows both agreement and disagreement. Model results of warmer-than-present summers are in agreement withfossil data. However, numerous localities with boreal forest records are in conflict with model reconstructions of an extensive cool steppe in interior Alaska and much of Yukon Territory during the last interglacial, (C) 2000 Elsevier Science Ltd. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 11/07/20 alle ore 04:39:36