Deciphering climatic history from lake sediments
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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.
KeywordsPaleolimnology Paleoclimate Paleohydrology Lakes Lake-level change Salinity
I thank John Smol and Bill Last for encouraging me to submit this manuscript and Frank Aeby, Erik Ekdahl, Jeffery Stone, and Karlyn Westover for assistance with figures. A Bullard Fellowship at Harvard Forest (Harvard University) and NSF Grant EAR-0602154 provided partial support during the writing of this paper.
- Aebly F, Fritz SC (2007) Paleohydrology of Kangerlussuaq (Sondre Stromfjord), west Greenland during the last ∼8000 years. Holocene (accepted)Google Scholar
- Cohen AS (2003) Paleolimnology: the history and evolution of lake systems. Oxford University Press, New YorkGoogle Scholar
- Ekdahl E, Fritz SC, Baker PA, Rigsby CA, Coley K (2007) Holocene multi-decadal to millennial-scale hydrologic variability on the South American Altiplano. Holocene (accepted)Google Scholar
- Eugster HP, Hardie LA (1978) Saline lakes. In: Lerman A (ed) Lakes, chemistry geology physics. Springer-Verlag, New York, pp 237–293Google Scholar
- Fritz SC, Metcalfe SE, Dean W (2001) Holocene climate patterns in the Americas inferred from paleolimnological records. In: Markgraf V (ed) Interhemispheric climate linkages. Academic Press, New York, pp 241–263Google Scholar
- Smol JP, Wolfe AP, John H, Birks B, Douglas MSV, Jones VJ, Korhola A, Pienitz R, Ruhland K, Sorvari S, Antoniades D, Brooks SJ, Fallu M, Hughes M, Keatley BE, Laing TE, Michelutti N, Nazarova L, Nyman M, Paterson AM, Perren B, Quinlan R, Rautio M, Saulnier-Talbot E, Siitonen S, Solovieva N, Weckstrom J (2005) Climate-driven regime shifts in the biological communities of Arctic lakes. Proc Nat Acad Sci 102:4397–4402CrossRefGoogle Scholar
- Westover KS (2006) Diatom-inferred records of paleolimnlogical and Holocene paleoclimate variability from the Altai Mountains (Siberia) and Columbia Mountains (British Columbia). Ph. D. Thesis, Department of Geosciences, University of Nebraska, LincolnGoogle Scholar
- Zlotnik VA, Burbach M, Swinehart J, Bennett D, Fritz SC, Loope DB, Olaguera F (2007) A case study of direct push methods for aquifer characterization in dune-lake environments of the Nebraska Sand Hills. Environ Eng Geol 13, in pressGoogle Scholar