The varve data-set from a freeze-core taken in the deepest part of Baldeggersee was subjected to
different multivariate statistical analyses in order to estimate the amount of variance in the varve
thickness measures explicable by past climate and by the trophic state of the lake. A comparison
of two different time-periods (1902 to 1992 versus 1920 to 1980) revealed that the lake restoration
programme since 1982 has had a significant impact on the formation of the seasonal layers. Results
of the partitioning of the variance in the varve thickness measures showed that about two thirds of
the variance are unexplained by a climate and trophic state model and that trophic state explains
6%, whereas climate accounts for about 28% of the variance before the effect of lake restoration
had a strong impact on the varves. Among the climate parameters the amount of annual precipitation
is a strong predictor for explaining the thickness of both dark layer and total couplet thickness,
whereas summer precipitation is important for the thickness of the light layer
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