| PALEOLIMNOLOGY |
Paleoclimate studies of minerogenic sediments using annually resolved textural parameters.
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Francus, P.,Bradley, R.S.,Abbott, M.B.,Patridge, W.,Keimig, F. 2002 Paleoclimate studies of minerogenic sediments using annually
resolved textural parameters. Geophysical Research Letters Vol. 29(20), 1998
| Data Coverage |
North: 79.334 * South: 79.334 |
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West: -83.85 * East: -83.85 |
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Altitude: 280 m |
Start Year: 1600 cal yr BP * End Year: 1999 cal yr BP
Data: Please Cite Data Contributors!
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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 um 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.
More Info on Paleolimnology |
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Complete XML Record: noaa-lake-6189
(Last Revised: 2009-02-11 )
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DOC/NOAA/NESDIS/NCDC (National Climatic Data Center, NESDIS, NOAA, U.S. Department of Commerce )
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| http://www.ncdc.noaa.gov/paleo/ |
| E-mail: bruce.a.bauer@noaa.gov |
| E-mail: paleo@noaa.gov |
Phone: 303-497-6280
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