CGRG Bibliography of Canadian Geomorphology
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Author : Bennett, J.R.; and Cumming. B.F.
Date : 1998
Title : Decadal-scale climatic change reconstructed from fossil diatom assemblages from a closed- basin lake in the Interior of British Columbia.
Publication : AMQUA 1998 - American Quaternary Association Program and Abstracts of the 15th Biennial Meeting, Puerto Vellarta, Mexico, 5-7 September 1998.
Issue :
Page(s) : 72.
Abstract
Reconstructions of moisture regimes using fossil diatom assemblages from closed-basin lakes are an important source of paleoclimatic information in many regions. They can achieve a temporal resolution which is not possible with most other paleoindicators. Thus, important shifts in moisture regimes on a decadal scale or less can be delineated, thereby allowing greater insights into the temporal and spatial patterns of climatic change. Climatic changes over the last ~2300 yr. B.P. from Big Lake, a closed-basin lake in the interior of British Columbia, have already been reconstructed using changes in fossil diatom assemblages. Cyclic fluctuations have been shown which have hitherto not been documented in this region. A larger-scale shift in moisture regimes was also found, at ~1200 yr. B.P., which has not been documented in this region. High resolution changes in salinity and depth over the last ~4000 yr.. B.P. will be reconstructed using fossil diatom remains from this lake. The extensionto ~4000 B.P.will help to determinewhetherthe shift ~1200 yr. B.P. is a part of a longer-term periodic pattern, and also determine whether shorter-term cyclic changes have been operating in the same manner over the last 4000 yr. B.P.
Bibliography of Canadian Geomorphology