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PORTAIL D'INFORMATION GÉOGRAPHIQUE

Climatic influence on the inter-annual variability of late-Holocene minerogenic sediment supply in a boreal forest catchment

Auteur(s) et Affiliation(s)

PETTERSON, G.
Dep. of Ecology and Environmental Science, Univ., Umeå, Suede
RENBERG, I.
Dep. of Ecology and Environmental Science, Univ., Umeå, Suede
Dep. of Mathematics and Mathematical Statistics, Univ., Umeå, Suede
ARNQVIST, P.
Dep. of Mathematics and Mathematical Statistics, Univ., Umeå, Suede
ANDERSON, N.J.
Dep. of Geography, Univ., Loughborough, Royaume-Uni


Description :
The sediment record at Kassjön (N. Sweden) consists of ∼6400 varves. Image analysis was used to determine grey-scale variation and varve thickness from which annual minerogenic accumulation rate (MinAR) was inferred for the period 4486 BC – AD 1900. MinAR varies on annual to centennial scales and mainly reflects channel bank erosion by the inflow streams. The mineral input reflects the intensity of the spring run-off, which is dependent on the amount of snow accumulated during the winter, and hence MinAR is a long-term record of variability in past winter climate; other factors will be a variable response to catchment uplift, vegetation succession and pedogenesis.


Type de document :
Article de périodique

Source :
Earth surface processes and landforms, issn : 0197-9337, 2010, vol. 35, n°. 4, p. 390-398, nombre de pages : 9, Références bibliographiques : 52 ref.

Date :
2010

Editeur :
Pays édition : Royaume-Uni, Chichester, Wiley

Langue :
Anglais
Droits :
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