Southern Finland 2,000 Year Lake Level Reconstructions Nevalainen, L.; Luoto, T.P. Nevalainen, L. Luoto, T.P. earth science/paleoclimate/climate reconstructions|lake levels|paleolimnology (depth,null,null,centimeter,null,climate reconstructions|lake levels|paleolimnology,null,null,N,null) earth science/paleoclimate/climate reconstructions|lake levels|paleolimnology (lake level,null,null,meter,null,climate reconstructions|lake levels|paleolimnology,null,null,N,Cladocera(intralake)-water depth) earth science/paleoclimate/climate reconstructions|lake levels|paleolimnology (lake level,midge assemblage,null,meter,null,climate reconstructions|lake levels|paleolimnology,null,null,N,null) earth science/paleoclimate/climate reconstructions|lake levels|paleolimnology (lake level,null,null,meter,null,climate reconstructions|lake levels|paleolimnology,null,null,N,Cladocera(multilake)-water depth) earth science/paleoclimate/climate reconstructions|lake levels|paleolimnology (age,null,null,year Common Era,null,climate reconstructions|lake levels|paleolimnology,null,null,N,null) earth science/paleoclimate/lake levels (Iso Lehmälampi>LATITUDE 64.33>LONGITUDE 24.6) We investigated an intralake surface sediment data set for fossil Cladocera from Lake Pieni-Kauro, eastern Finland, with an objective to develop a paleohydrological inference model for lake level reconstructions. The Cladocera assemblages showed high heterogeneity among the sampling sites according to the water depth gradient, thus enabling the construction of a quantitative inference model for water level reconstructions. The strongest model was developed using weighted averaging with classical deshrinking regression. This model had a jackknifed coefficient of determination of 0.79 and a root mean squared error of prediction of 0.79m. We tested the performance of the model on previously available Cladocera stratigraphy and Cladocera-based and chironomid-based lake level reconstructions from Lake Iso Lehmälampi, southern Finland. The lake level reconstructions, based on different proxies and independent inference models, showed high levels of similarity, indicating a period of lower water table during the Medieval Climate Anomaly around 1000 ad. The results suggest that the applicability of intralake paleohydrological models may not be regionally restricted when applied to similar lake types and, therefore, provide an alternative perspective on paleolimnological training set design and paleoclimatological inferences. STUDY NOTES: Lake level reconstructions, Iso Lehmälampi, Finland NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Nevalainen, L. Investigator : Luoto, T.P. 2017-06-06 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/22212 https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/lakelevels/europe/finland/lehmalampi2012.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/lakelevels/europe/finland/lehmalampi2012.txt English https://www.ncdc.noaa.gov/paleo/study/22212 https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/lakelevels/europe/finland/lehmalampi2012.txt Liisa Nevalainen and Tomi P. Luoto2012Intralake training set of fossil Cladocera for paleohydrological inferences: evidence for multicentennial drought during the Medieval Climate AnomalyEcohydrology56834-84010.1002/eco.275http://onlinelibrary.wiley.com/doi/10.1002/eco.275/full Tomi P. Luoto2009A Finnish chironomid- and chaoborid-based inference model for reconstructing past lake levelsQuaternary Science Reviews2815-161481-148910.1016/j.quascirev.2009.01.015http://www.sciencedirect.com/science/article/pii/S0277379109000407 Liisa Nevalainen, Kaarina Sarmaja-Korjonen, Tomi P. Luoto2011Sedimentary Cladocera as indicators of past water-level changes in shallow northern lakesQuaternary Research753430-43710.1016/j.yqres.2011.02.007http://www.sciencedirect.com/science/article/pii/S0033589411000275 START YEAR: 89 AD * END YEAR: 2000 AD 24.6 64.33 24.6 64.33