Deciphering climatic history from lake sediments |
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| Authors: | Sherilyn C Fritz |
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| Institution: | (1) Department of Geosciences and School of Biological Sciences, University of Nebraska – Lincoln, Lincoln, NE 68588-0340, USA |
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| Abstract: | Reconstructing climate from lake sediments can be challenging, because the response of lakes and various components of lake
systems are mediated by non-climatic factors, such as geomorphic and hydrologic stetting. As a result, the magnitude of lake
response to climatic forcing may be non-linear. In addition, changes in the lake system associated with the aging process
or non-climatic influences may alter the response to a given climate perturbation. These non-linear and non-stationary characteristics
can produce spatial heterogeneity in the pattern and timing of inferred change. One approach for generating regionally robust
climatic interpretations from lakes is to increase coordinated efforts to generate and synthesize large data sets, so that
localized influences can be more clearly distinguished from broad-scale regional patterns. This approach will be most successful
for evaluating climate variation at multi-decadal or longer temporal scales; the climatic interpretation of higher frequency
limnological variation can be more complicated, because of dating uncertainties and differential response times of individual
proxies and systems.
This paper is based on a plenary talk at the 10th International Paleolimnology Conference in Duluth, Minnesota in July 2006. |
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| Keywords: | Paleolimnology Paleoclimate Paleohydrology Lakes Lake-level change Salinity |
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