Climate variability and ecosystem dynamics of remote alpine and arctic lakes: the MOLAR project

被引:0
|
作者
Richard W. Battarbee
Roy Thompson
Jordi Catalan
John-Arvid Grytnes
H.J.B. Birks
机构
[1] University College London,Environmental Change Research Centre
[2] University of Edinburgh,Department of Geology and Geophysics
[3] Universitat de Barcelona,Department d'Ecologia
[4] University of Bergen,Botanical Institute
来源
Journal of Paleolimnology | 2002年 / 28卷
关键词
remote mountain lakes; palaeolimnology; climate change; instrumental records;
D O I
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中图分类号
学科分类号
摘要
This paper introduces the results of an integrated project designed to compare high resolution analysis of proxy records of climate change in the sediments of seven mountain lakes across Europe with reconstructed instrumental records of climate change over the last 200 years. Palaeolimnological methods used include radiometric dating (210Pb, 137Cs), mineral magnetics, dry weight, loss-on-ignition, carbon, nitrogen, sulphur, pigments, diatoms, chrysophyte cysts, cladocera and chironomids. Changes in fossil assemblages were summarised using principal components analysis. The stratigraphic data were compared with the instrumental record using linear regression techniques. The dated sediment records for each proxy from each site were treated as the response variables and the various attributes of the instrumental climate record as the predictor variables. The predictor variables were generated for each site for the period 1781 to 1997 using temperature reconstructions based on meteorological records. To harmonise the climatic predictors and the response variables, the climatic variables were smoothed along time with a LOESS regression. The results of the various analyses at the seven sites are presented in the following papers. A synthesis of the project and the relative performance of the different proxy methods are discussed in the final paper.
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页码:1 / 6
页数:5
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