Paleoclimate studies of minerogenic sediments using annually resolved textural parameters.

We obtained quantitative multivariate data from each varve of a minerogenic lacustrine sequence from the Canadian High Arctic, using an image analysis technique applied to thin‐sections. The information on each varve from the uppermost core section was compared with a 35 yr meteorological dataset. S...

Full description

Bibliographic Details
Published in:Geophysical Research Letters
Main Authors: Francus, Pierre, Bradley, Raymond S., Abbott, Mark B., Patridge, Whit, Keimig, Frank
Format: Article in Journal/Newspaper
Language:unknown
Published: 2002
Subjects:
hydrology
erosion and sedimentation
information Relatedto Geographic Region
Arctic region
snow andice
global change
instruments and techniques
Arctic
Online Access:https://espace.inrs.ca/id/eprint/11097/
https://doi.org/10.1029/2002GL015082
Description
Summary:We obtained quantitative multivariate data from each varve of a minerogenic lacustrine sequence from the Canadian High Arctic, using an image analysis technique applied to thin‐sections. The information on each varve from the uppermost core section was compared with a 35 yr meteorological dataset. Snowmelt intensity, which is an index reflecting the energy available for sediment transport, correlates well with the median grain‐size measured for each varve, as well as with the weight of the 10–20 and 20–60 μm fractions. The proportion of fine silt also correlates with low intensity summer precipitation. This methodology allows us to decipher the climatic control on sedimentary processes and yield a new perspective for constructing models which link climate to sediments that contain few biological remains. This model can then be used to infer paleoclimate with annual resolution from the downcore grain‐size analysis.

Similar Items