# Lac du Sommet, Quebec Air Temperature Reconstructions for the Past 9500 Years #----------------------------------------------------------------------- # World Data Service for Paleoclimatology, Boulder # and # NOAA Paleoclimatology Program # National Centers for Environmental Information (NCEI) #----------------------------------------------------------------------- # Template Version 3.0 # Encoding: UTF-8 # NOTE: Please cite Publication, and Online_Resource and date accessed when using these data. # If there is no publication information, please cite Investigators, Title, and Online_Resource and date accessed. # # Online_Resource: https://www.ncdc.noaa.gov/paleo/study/30692 # Online_Resource_Description: NOAA Landing Page # # Online_Resource: https://www.ncdc.noaa.gov/paleo/study/27330 # Online_Resource_Description: NOAA Landing Page for Temperature-12k Database # # Online_Resource: https://www.ncei.noaa.gov/pub/data/paleo/reconstructions/climate12k/temperature/version1.0.0/Temp12k_directory_NOAA_files/LacduSommet.Hausmann.2011.txt # Online_Resource_Description: NOAA location of the template # # Online_Resource: https://www.ncei.noaa.gov/pub/data/paleo/reconstructions/climate12k/temperature/version1.0.0/Temp12k_directory_LiPD_files/LacduSommet.Hausmann.2011.lpd # Online_Resource_Description: Linked Paleo Data (LiPD) formatted file containing metadata and data related to this file, for version 1.0.0 of this dataset. # # Original_Source_URL: # Description/Documentation lines begin with # # Data lines have no # # # Data_Type: Climate Reconstructions # Parameter_Keywords: air temperature # Dataset_DOI: # #------------------ # Contribution_Date # Date: 2020-04-15 #------------------ # File_Last_Modified_Date # Date: 2020-05-16 #------------------ # Title # Study_Name: Lac du Sommet, Quebec Air Temperature Reconstructions for the Past 9500 Years #------------------ # Investigators # Investigators: Hausmann, Sonja; Larocque-Tobler, Isabelle; Richard, Pierre J.H.; Pienitz, Reinhard; St-Onge, Guillaume; Fye, Falko #------------------ # Description_Notes_and_Keywords # Description: This dataset was contributed as part of the Temperature-12k project (https://doi.org/10.25921/4RY2-G808). Data were contributed to the project from the original data generators, who are listed in the Investigator field of this template file. Additional notes regarding the use of these data in the Temperature-12k project can be found in the LiPD file listed as an Online_Resource of this template file. #------------------ # Publication # Authors: Hausmann, Sonja; Larocque-Tobler, Isabelle; Richard, Pierre J.H.; Pienitz, Reinhard; St-Onge, Guillaume; Fye, Falko # Published_Date_or_Year: 2011 # Published_Title: Diatom-inferred wind activity at Lac du Sommet, southern Qu̩ebec, Canada: A multiproxy paleoclimate reconstruction based on diatoms, chironomids and pollen for the past 9500 years # Journal_Name: The Holocene # Volume: 21 # Edition: # Issue: 6 # Pages: 925-938 # Report: # DOI: 10.1177/0959683611400199 # Online_Resource: # Full_Citation: # Abstract: Paleo surface wind for southern Quebec was inferred quantitatively for the past 9500 years from diatom assemblages archived in the sediment of the shallow mountain Lac du Sommet using biweekly sediment trap samples along an elevation gradient in the study area. The wind reconstruction was compared with diatom-inferred dissolved organic carbon concentration, chironomid-inferred mean August air temperature, pollen, grain size and loss-on-ignition. Increased lake circulation, interpreted as indicating stronger surface winds, was inferred from diatoms around 8700, 4500, 3000 to 2000 cal. yr BP and during the past 250 years. Increased lake stratification was diatom-inferred from 7500 to 5000 cal. yr BP and between 1500 and 500 cal. yr BP. Diatom-inferred paleowinds were congruent with the regional fire history. In general, diatom production was significantly correlated with diatom-inferred lake circulation. Diatom-inferred lake circulation and diatom production were not correlated with the pollen assemblage changes, diatom-inferred dissolved organic carbon and chironomid-inferred August air temperature, which were highly intercorrelated. After the disappearance of the meltwater in the St Lawrence River valley, the chironomids reflected a warming trend that lasted until about 5000 cal. yr BP, trees replaced shrubs and diatom-inferred dissolved organic carbon increased from 4 mg/l to 6 mg/l. Diatom-inferred lake circulation exhibited periodicities of 200 and 900 years, whereas chironomid-inferred August air temperatures indicated a distinct (significant) 200 year periodicity. #------------------ # Publication # Authors: Kaufman, D., N. McKay, C. Routson, M. Erb, B. Davis, O. Heiri, S. Jaccard, J. Tierney, C. Dätwyler, Y. Axford, T. Brussel, O. Cartapanis, B. Chase, A. Dawson, A. de Vernal, S. Engels, L. Jonkers, J. Marsicek, P. Moffa-Sánchez, C. Morrill, A. Orsi, K. Rehfeld, K. Saunders, P. S. Sommer, E. Thomas, M. Tonello, M. Tóth, R. Vachula, A. Andreev, S. Bertrand, B. Biskaborn, M. Bringué, S. Brooks, M. Caniupán, M. Chevalier, L. Cwynar, J. Emile-Geay, J. Fegyveresi, A. Feurdean, W. Finsinger, M-C. Fortin, L. Foster, M. Fox, K. Gajewski, M. Grosjean, S. Hausmann, M. Heinrichs, N. Holmes, B. Ilyashuk, E. Ilyashuk, S. Juggins, D. Khider, K. Koinig, P. Langdon, I. Larocque-Tobler, J. Li, A. Lotter, T. Luoto, A. Mackay, E. Magyari, S. Malevich, B. Mark, J. Massaferro, V. Montade, L. Nazarova, E. Novenko, P. Paril, E. Pearson, M. Peros, R. Pienitz, M. Plóciennik, D. Porinchu, A. Potito, A. Rees, S. Reinemann, S. Roberts, N. Rolland, S. Salonen, A. Self, H. Seppä, S. Shala, J-M. St-Jacques, B. Stenni, L. Syrykh, P. Tarrats, K. Taylor, V. van den Bos, G. Velle, E. Wahl, I. Walker, J. Wilmshurst, E. Zhang, S. Zhilich # Published_Date_or_Year: 2020-04-14 # Published_Title: A global database of Holocene paleotemperature records # Journal_Name: Scientific Data # Volume: 7 # Edition: 115 # Issue: # Pages: # Report_Number: # DOI: 10.1038/s41597-020-0445-3 # Online_Resource: https://www.nature.com/articles/s41597-020-0445-3 # Full_Citation: # Abstract: A comprehensive database of paleoclimate records is needed to place recent warming into the longer-term context of natural climate variability. We present a global compilation of quality-controlled, published, temperature-sensitive proxy records extending back 12,000 years through the Holocene. Data were compiled from 679 sites where time series cover at least 4000 years, are resolved at sub-millennial scale (median spacing of 400 years or finer) and have at least one age control point every 3000 years, with cut-off values slackened in data-sparse regions. The data derive from lake sediment (51%), marine sediment (31%), peat (11%), glacier ice (3%), and other natural archives. The database contains 1319 records, including 157 from the Southern Hemisphere. The multi-proxy database comprises paleotemperature time series based on ecological assemblages, as well as biophysical and geochemical indicators that reflect mean annual or seasonal temperatures, as encoded in the database. This database can be used to reconstruct the spatiotemporal evolution of Holocene temperature at global to regional scales, and is publicly available in Linked Paleo Data (LiPD) format. #------------------ # Funding_Agency # Funding_Agency_Name: # Grant: #------------------ # Site_Information # Site_Name: Lac du Sommet # Location: Quebec # Country: Canada # Northernmost_Latitude: 47.7167 # Southernmost_Latitude: 47.7167 # Easternmost_Longitude: -70.6667 # Westernmost_Longitude: -70.6667 # Elevation: 830 #------------------ # Data_Collection # Collection_Name: LacduSommet.Hausmann.2011 # Earliest_Year: 9483.0 # Most_Recent_Year: -52.0 # Time_Unit: cal yr BP # Core_Length: # Notes: #------------------ # Species # Species_Name: # Species_Code: # Common_Name: #------------------ # Chronology_Information # Chronology: # OriginalDateID depth age_type age material # nan 0.0 Core top -53.0 core collected in 2003; for 210Pb chronology see Hausmann and Pienitz (2007) # Beta-189065 43.75 age14C 1290.0 wood sample # Beta-189066 121.75 age14C 2640.0 wood sample # Beta-189067 183.75 age14C 3890.0 wood sample # Beta-193473 240.25 age14C 6220.0 wood sample # Beta-202755 278.25 age14C 7950.0 wood sample # Beta-197083 281.75 age14C 7790.0 wood sample # Beta-180545 300.75 age14C 8590.0 wood sample #------------------ # 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 depth,,,centimeter,,insect;paleolimnology;climate reconstructions,,,N, ## age age,,,calendar year before present,,insect;paleolimnology;climate reconstructions,,,N, ## temperature surface air temperature,midge assemblage,,degree Celsius,Aug,insect;paleolimnology;climate reconstructions,,,N,transfer function modified from Larocque et al. (2006) and Larocque 2008; modern temperature is 30-year average; local cooling effects on air temperatures from nearby ice sheet drainage until 8500 yrs BP; WAPLS ## reliable notes,,,,,insect;paleolimnology;climate reconstructions,,,C,Data are reliable (Yes or No) # #------------------ # Data: # Data lines follow (have no #) # Data line format - tab-delimited text, variable short name as header # Missing_Values: nan # depth age temperature reliable nan -52.0 12.412 Y 0.25 -51.082 13.007 Y 0.5 -50.218 12.585 Y 0.75 -49.031 12.233 Y 5.5 -15.0 12.058 Y 6.25 -10.0 12.184 Y 7.5 -1.0 12.007 Y 8.5 8.0 12.746 Y 9.5 28.0 12.218 Y 10.75 51.0 12.465 Y 14.25 202.0 12.214 Y 16.5 318.0 11.918 Y 17.25 341.0 12.732 Y 18.5 408.0 12.234 Y 20.5 493.0 12.236 Y 22.5 555.0 12.404 Y 22.75 575.0 12.72 Y 24.25 634.0 12.419 Y 25.5 673.0 12.28 Y 26.5 711.0 12.16 Y 28.5 784.0 12.727 Y 30.25 854.0 12.629 Y 36.75 1048.0 12.017 Y 38.75 1122.0 12.508 Y 44.75 1285.0 13.02 Y 52.25 1464.0 11.382 Y 55.75 1540.0 12.444 Y 59.25 1611.0 12.624 Y 62.75 1678.0 12.005 Y 67.25 1760.0 12.363 Y 69.25 1795.0 12.567 Y 72.75 1854.0 12.751 Y 76.75 1919.0 11.933 Y 80.75 1983.0 12.396 Y 84.25 2037.0 12.272 Y 87.75 2091.0 12.248 Y 91.25 2145.0 12.513 Y 94.75 2199.0 13.309 Y 97.75 2246.0 13.836 Y 101.25 2301.0 13.479 Y 108.75 2424.0 13.224 Y 111.75 2475.0 12.036 Y 115.75 2537.0 12.819 Y 116.25 2555.0 11.801 Y 119.75 2620.0 12.625 Y 123.75 2698.0 12.904 Y 126.25 2748.0 12.612 Y 128.75 2799.0 13.928 Y 131.25 2853.0 13.031 Y 135.25 2941.0 12.854 Y 138.75 3023.0 12.971 Y 141.25 3083.0 12.745 Y 144.75 3170.0 12.783 Y 148.75 3275.0 12.599 Y 152.25 3370.0 13.368 Y 154.75 3441.0 12.238 Y 156.75 3499.0 12.507 Y 159.25 3573.0 11.988 Y 161.75 3650.0 12.776 Y 168.75 3841.0 12.076 Y 169.75 3908.0 11.705 Y 171.75 3975.0 12.821 Y 175.75 4115.0 12.372 Y 178.75 4223.0 12.631 Y 180.75 4296.0 11.983 Y 182.25 4352.0 11.339 Y 186.25 4505.0 11.515 Y 191.75 4722.0 13.005 Y 194.25 4824.0 12.575 Y 197.75 4969.0 12.986 Y 200.25 5075.0 12.593 Y 202.75 5161.0 12.482 Y 205.25 5292.0 12.413 Y 207.75 5402.0 11.836 Y 209.25 5469.0 13.029 Y 211.75 5581.0 12.865 Y 218.35 5879.0 12.317 Y 222.75 6090.0 12.091 Y 225.75 6231.0 12.227 Y 228.75 6374.0 11.861 Y 232.25 6542.0 11.483 Y 235.75 6566.0 11.88 Y 239.75 6903.0 11.719 Y 243.25 7071.0 11.959 Y 246.75 7239.0 12.189 Y 253.25 7549.0 11.866 Y 250.25 7407.0 12.256 Y 256.75 7691.0 12.821 Y 260.25 7877.0 11.922 Y 263.75 8037.0 11.21 Y 267.25 8194.0 10.858 Y 270.25 8326.0 11.622 Y 273.25 8456.0 10.439 Y 277.75 8643.0 11.947 Y 280.25 8744.0 10.364 Y 284.75 8918.0 11.04 Y 285.5 8936.0 10.828 Y 288.25 9046.0 11.087 Y 290.25 9116.0 10.308 Y 291.75 9167.0 10.285 Y 293.25 9217.0 10.442 Y 294.25 9249.0 10.829 Y 295.25 9281.0 9.861 Y 298.75 9372.0 9.626 Y 302.75 9429.0 9.874 Y 305.75 9456.0 9.513 Y 309.25 9483.0 10.3 Y