# Eastern Finland 1,000 Year Lake Level Reconstructions #----------------------------------------------------------------------- # World Data Service for Paleoclimatology, Boulder # and # NOAA Paleoclimatology Program #----------------------------------------------------------------------- # NOTE: Please cite original publication, online resource and date accessed when using this data. # If there is no publication information, please cite Investigator, title, online resource and date accessed. # # Description/Documentation lines begin with # # Data lines have no # # # Online_Resource: https://www.ncdc.noaa.gov/paleo/study/22213 # Description: NOAA Landing Page # Online_Resource: http://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/lakelevels/europe/finland/pieni-kauro2013.txt # Description: NOAA location of the template # # # Archive: Lake Level Reconstruction # # Parameter_Keywords: #--------------------------------------- # Contribution_Date # Date: 2017-06-06 #--------------------------------------- # File_Last_Modified_Date # Date: 2017-06-06 #--------------------------------------- # Title # Study_Name: Eastern Finland 1,000 Year Lake Level Reconstructions #--------------------------------------- # Investigators # Investigators: Luoto, T.P.; Nevalainen, L.; Helama, S. #--------------------------------------- # Description_Notes_and_Keywords # Description: Lake level reconstructions based on sedimentary cladoceran fossils. #--------------------------------------- # Publication # Authors: Nevalainen, L., Helama, S. and Luoto, T.P. # Published_Date_or_Year: 2013 # Published_Title: Hydroclimatic variations over the last millennium in eastern Finland disentangled by fossil Cladocera # Journal_Name: Palaeogeography, Palaeoclimatology, Palaeoecology # Volume: 378 # Edition: # Issue: # Pages: 13-21 # Report Number: # DOI: 10.1016/j.palaeo.2013.03.016 # Online_Resource: # Full_Citation: # Abstract: Future climate warming is expected to alter atmospheric moisture balance and therefore paleoclimatic archives of past moisture and hydrological patterns may provide understanding of the magnitude, speed, and ecosystem responses to the regionally altered climatic regimes. The present study aimed at disentangling millennial variation in hydroclimatic parameters, including summer effective moisture (lake levels) and ice-free season by using sedimentary cladoceran fossils. We used a site-specific cladoceran-based inference model to reconstruct lake level fluctuations in a 1500-yr sediment record from Lake Pieni-Kauro, eastern Finland in the context of previously established paleoclimatic data of summer temperature and precipitation. In addition, we applied cladoceran planktonic/littoral ratio, mean body size, and abundance of fossil ephippia as supplementary proxies for paleoclimatic interpretations. The results showed that lake level was lower during the pre- and early Medieval Climate Anomaly (MCA, around 500-1000 AD) than at present and started to rise toward the culmination during the Little Ice Age (LIA, around 1600–1700 AD) when the lake level was higher than at present. Pelagic cladoceran body size was larger and abundance of ephippia increased during the LIA suggesting significant reduction in the length of the ice-free season and lower water temperatures. Comparison of the lake level reconstruction with the previous paleoclimatic data suggested that effective moisture has had a long-term negative relationship with temperature and positive relationship with summer precipitation in eastern Finland. The results indicated that the pre- and early MCA was warm and dry (long ice-free season, low summer effective moisture) and the culmination of the LIA was cool and moist (reduced ice-free season, increased summer effective moisture). Unraveling the seasonality of the multicentury hydroclimatic patterns in eastern Finland may offer important insights in linking the large-scale atmospheric circulation patterns to seasonal climate events. #--------------------------------------- # Publication # Authors: Luoto, T.P. and Helama, S. # Published_Date_or_Year: 2010 # Published_Title: Palaeoclimatological and palaeolimnological records from fossil midges and tree-rings: the role of the North Atlantic Oscillation in eastern Finland through the Medieval Climate Anomaly and Little Ice Age # Journal_Name: Quaternary Science Reviews # Volume: 29 # Edition: # Issue: # Pages: 2411-2423 # Report Number: # DOI: 10.1016/j.quascirev.2010.06.015 # Online_Resource: # Full_Citation: # Abstract: Hydrological changes and air temperature variability are reconstructed from the sediments of Lake Pieni-Kauro, eastern Finland during the Medieval Climate Anomaly (MCA) and Little Ice Age (LIA) using transfer functions derived from midge (Insecta: Nematocera)-based calibration models. The reconstructions are compared with a regional tree-ring chronology and sediment physical properties are determined to track depositional changes. An objective of the study is to examine the long-term relationship between the North Atlantic Oscillation (NAO) and climate (temperature, precipitation). Our results show that the MCA was characterized by warm and dry summer conditions, which were accompanied by changes in the sediment magnetic susceptibility values most likely representing major forest fires during the tree-ring indicated MCA megadrought. However, the midge-based stream flow reconstruction shows increased values during the MCA, thus implying enhanced spring floods after snowy winters. During the LIA, the tree-ring data indicate that a generally wetter climate prevailed during summers, but the stream flow reconstruction indicates less snowy winters. In the terms of long-term climatology, the present results show support to the concept that the NAO has a positive correlation between winter precipitation and annual temperature and a negative correlation between summer precipitation in eastern Finland. Thus, the results may serve as important background data for global change assessments. #--------------------------------------- # Funding_Agency # Funding_Agency_Name: # Grant: #--------------------------------------- # Site Information # Site_Name: Pieni-Kauro # Location: Europe>Northern Europe>Scandanavia>Finland # Country: Finland # Northernmost_Latitude: 64.2833 # Southernmost_Latitude: 64.2833 # Easternmost_Longitude: 30.1167 # Westernmost_Longitude: 30.1167 # Elevation: 188 m #--------------------------------------- # Data_Collection # Collection_Name: Pieni-Kauro2013LL # First_Year: 470 # Last_Year: 1990 # Time_Unit: AD # Core_Length: # Notes: #--------------------------------------- # Chronology_Information # Chronology: #--------------------------------------- # Variables # Data variables follow that are preceded by "##" in columns one and two. # Variables list, one per line, shortname-tab-longname components (9 components: what, material, error, units, seasonality, archive, detail, method, C or N for Character or Numeric data) ## Depth (cm) Sediment depth,,,cm,,,,,, ## Age AD Chronology,,,AD,,,,,, ## Cladocera-water depth (m) Reconstructed lake depth,,,m,,Cladocera,,Transfer function,, ## Chironomid-stream flow (m) Reconstructed stream flow,,,m,,Chironomids,,Index,, #------------------------ # Data # Data lines follow (have no #) # Data line format - tab-delimited text, variable short name as header # Missing Value: Depth (cm) Year AD Cladocera-water depth (m) Chironomid-stream flow (m) 0 1990 5.75 0.106932 1 1945 6.07 0.256471 2 1900 7.03 -0.0680317 3 1855 6.85 0.20138 4 1810 6.11 0.241621 5 1765 5.84 -0.00142156 6 1720 6.63 0.117167 7 1675 7.18 0.0541349 8 1630 7.06 0.0900777 9 1600 8.09 0.108561 10 1560 8.17 0.135067 11 1530 8.43 0.158829 12 1495 7.33 0.0278488 13 1450 6.52 0.203877 14 1405 6.31 -0.0177259 15 1360 5.90 0.200788 16 1315 5.90 0.267167 17 1270 6.87 0.351843 18 1225 7.36 0.12222 19 1180 7.30 0.261633 20 1135 5.28 0.182513 21 1090 6.14 0.325673 22 1030 5.51 0.185262 23 960 6.54 0.192726 24 920 4.82 0.195822 25 850 4.76 0.304882 26 800 4.57 0.133596 27 750 4.22 0.131465 28 700 4.46 0.154362 29 660 4.88 0.154109 30 600 5.15 0.0705 31 560 5.20 0.301683 32 530 4.81 0.156675 33 510 5.28 0.23184 34 490 5.21 0.252332 35 470 4.57 0.385504