Skip to Main Content
Skip Nav Destination
GEOREF RECORD

Holocene and last interglacial cloudiness in eastern Baffin Island, Arctic Canada

Bianca Frechette, Anne de Vernal and Pierre J. H. Richard
Holocene and last interglacial cloudiness in eastern Baffin Island, Arctic Canada (in Polar Climate Stability Network--Le reseau d'etudes de la stabilite du climat polaire, Claude Hillaire-Marcel (editor))
Canadian Journal of Earth Sciences = Revue Canadienne des Sciences de la Terre (November 2008) 45 (11): 1221-1234

Abstract

This study presents Last Interglacial and Holocene vegetation and climate changes at Fog Lake (67 degrees 11'N, 63 degrees 15'W) on eastern Baffin Island, Arctic Canada. The vegetation cover is reported as vegetation structural types (or biomes). July air temperature and sunshine during the growing season (June-July-August-September) were reconstructed from pollen assemblages using the modern analogue technique. The vegetation of the Last Interglacial period evolved from a prostrate dwarf-shrub tundra to a low- and high-shrub tundra vegetation. The succession of four Arctic biomes was distinguished from the Last Interglacial sediments, whereas only one Arctic biome was recorded in the Holocene sediments. From ca. 8300 cal. years BP to present, hemiprostrate dwarf-shrub tundra occupied the soils around Fog Lake. During the Last Interglacial, growing season sunshine was higher than during the Holocene and July air temperature was 4 to 5 degrees C warmer than present. A principal component analysis helped in assessing relationship between floristic gradients and climate. The major vegetation changes through the Last Interglacial and Holocene were driven by July air temperature variations, whereas the minor, or subtle, vegetation changes seem rather correlated to September sunshine. This study demonstrates that growing season sunshine conditions can be reconstructed from Arctic pollen assemblages, thus providing information on feedbacks associated with cloud cover and summer temperatures, and therefore growing season length.


ISSN: 0008-4077
EISSN: 1480-3313
Coden: CJESAP
Serial Title: Canadian Journal of Earth Sciences = Revue Canadienne des Sciences de la Terre
Serial Volume: 45
Serial Issue: 11
Title: Holocene and last interglacial cloudiness in eastern Baffin Island, Arctic Canada
Title: Polar Climate Stability Network--Le reseau d'etudes de la stabilite du climat polaire
Author(s): Frechette, Biancade Vernal, AnneRichard, Pierre J. H.
Author(s): Hillaire-Marcel, Claudeeditor
Affiliation: Universite du Quebec a Montreal, GEOTOP, Montreal, QC, Canada
Affiliation: Universite du Quebec a Montreal, GEOTOP, Montreal, QC, Canada
Pages: 1221-1234
Published: 200811
Text Language: English
Summary Language: French
Publisher: National Research Council of Canada, Ottawa, ON, Canada
References: 61
Accession Number: 2009-062672
Categories: Quaternary geology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. charts, 4 tables, sketch maps
N67°10'60" - N67°10'60", W63°15'00" - W63°15'00"
Secondary Affiliation: Universite de Montreal, CAN, Canada
Country of Publication: Canada
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute.
Update Code: 200934
Close Modal

or Create an Account

Close Modal
Close Modal