# Lake Silvaplana, Switzerland 370 Year Minerals Data #----------------------------------------------------------------------- # World Data Service for Paleoclimatology, Boulder # and # NOAA Paleoclimatology Program #----------------------------------------------------------------------- # Template Version 4.0 # Encoding: UTF-8 # NOTE: Please cite original publication, NOAA Landing Page URL, dataset and publication DOIs (where available), # and date accessed when using these downloaded data. If there is no publication information, please cite investigator, study title, NOAA Landing Page URL, and date accessed. # # NOAA_Landing_Page: https://www.ncdc.noaa.gov/paleo/study/13017 # Landing_Page_Description: NOAA Landing Page of this file's parent study, which includes all study metadata. # # Study_Level_JSON_Metadata: https://www.ncei.noaa.gov/pub/data/metadata/published/paleo/json/noaa-lake-13017.json # Study_Level_JSON_Description: JSON metadata of this file's parent study, which includes all study metadata. # # Data_Type: Paleolimnology # # Dataset_DOI: # # Science_Keywords: Little Ice Age (LIA) #------------------- # Resource_Links # # Data_Download_Resource: https://www.ncei.noaa.gov/pub/data/paleo/paleolimnology/europe/switzerland/silvaplana2008b-noaa.txt # Data_Download_Description: NOAA Template File; Silvaplana 370 Year Mineral Data # # Original_Source_URL: # Original_Source_Description: # #------------------- # Contribution_Date # Date: 2012-06-13 #------------------- # File_Last_Modified_Date # Date: 2021-09-10 #------------------- # Title # Study_Name: Lake Silvaplana, Switzerland 370 Year Minerals Data #------------------- # Investigators # Investigators: Trachsel, M. (https://orcid.org/0000-0003-0078-5795); Eggenberger, U.; Grosjean, M. (https://orcid.org/0000-0002-3553-8842); Blass, A.; Sturm, M. (https://orcid.org/0000-0003-2414-7894) #------------------- # Description_Notes_and_Keywords # Description: X-ray diffraction peak intensity ratios of minerals in the sediment layers (quartz qz, plagioclase pl, amphibole am, mica mi) of Lake Silvaplana, Switzerland. Lake Silvaplana, Switzerland: 46°27'N, 9°48'E, 1800m #------------------- # Publication # Authors: Trachsel, M., U. Eggenberger, M. Grosjean, A. Blass, and M. Sturm # Journal_Name: Geophysical Research Letters # Published_Title: Mineralogy-based quantitative precipitation and temperature reconstructions from annually laminated lake sediments (Swiss Alps) since AD 1580 # Published_Date_or_Year: 2008 # Volume: 35 # Pages: # Issue: 13 # Report_Number: L13707 # DOI: 10.1029/2008GL034121 # Full_Citation: Trachsel, M., U. Eggenberger, M. Grosjean, A. Blass, and M. Sturm. 2008. Mineralogy-based quantitative precipitation and temperature reconstructions from annually laminated lake sediments (Swiss Alps) since AD 1580. Geophysical Research Letters, Vol. 35, no. 13, L13707, doi:10.1029/2008GL034121 # Abstract: We present quantitative autumn, summer and annual precipitation and summer temperature reconstructions from proglacial annually laminated Lake Silvaplana, eastern Swiss Alps back to AD 1580. We used X-ray diffraction peak intensity ratios of minerals in the sediment layers (quartz qz, plagioclase pl, amphibole am, mica mi) that are diagnostic for different source areas and hydrometeorological transport processes in the catchment. XRD data were calibrated with meteorological data (AD 1800/1864-1950) and revealed significant correlations: mi/pl with SON precipitation (r = 0.56, p < 0.05) and MJJAS precipitation (r = 0.66, p < 0.01); qz/mi with MJJAS temperature (r = -0.72, p < 0.01) and qz/am with annual precipitation (r = -0.54, p < 0.05). Geological catchment settings and hydro-meteorological processes provide deterministic explanations for the correlations. Our summer temperature reconstruction reproduces the typical features of past climate variability known from independent data sets. The precipitation reconstructions show a LIA climate moister than today. Exceptionally wet periods in our reconstruction coincide with regional glacier advances. #------------------- # Funding_Agency # Funding_Agency_Name: European Union FP6 project "Millennium" # Grant_Number: 017008 #------------------- # Funding_Agency # Funding_Agency_Name: ENvironmental changes in mountain regions; recorded in high-resolution archives of LAkes of the UppeR EnGadinE, Switzerland (ENLARGE) # Grant_Number: NF-200021-106005/1 #------------------- # Funding_Agency # Funding_Agency_Name: Swiss National Science Foundation (SNSF) National Centre of Competence in Research (NCCR) Climate # Grant_Number: #------------------- # Site_Information # Site_Name: Lake Silvaplana # Location: Continent>Europe>Western Europe>Switzerland # Northernmost_Latitude: 46.45 # Southernmost_Latitude: 46.45 # Easternmost_Longitude: 9.8 # Westernmost_Longitude: 9.8 # Elevation_m: 1800 #------------------- # Data_Collection # Collection_Name: Trachsel2008b # First_Year: 1581 # Last_Year: 1950 # Time_Unit: AD # Core_Length_m: # Parameter_Keywords: mineralogy # Notes: Lake Silvaplana mineralogical data; Standardized proxy data ratio Qz/Am (Pann, negatively correlated) and ratio Mi/Pl (P MJJAS; P SON) #------------------- # Chronology_Information # Chronology: #------------------- # Variables # # PaST_Thesaurus_Download_Resource: https://www.ncdc.noaa.gov/paleo/skos/past-thesaurus.rdf # PaST_Thesaurus_Download_Description: Paleoenvironmental Standard Terms (PaST) Thesaurus terms, definitions, and relationships in SKOS format. # # variables format: shortname what,material,error,units,seasonality,data_type,detail,method, C(har) or N(umeric) data,additional information # ## Year age,,,year Common Era,,paleolimnology,,,N, ## Qz/Am mineral index,sediment,,dimensionless,,paleolimnology,normalized,x-ray diffraction,N,quartz/amphibole ## Mi/Pl mineral index,sediment,,dimensionless,,paleolimnology,normalized,x-ray diffraction,N,mica/plagioclase #------------------------------- # DATA: # Missing_Values: NA Year Qz/Am Mi/Pl 1950 0.413384594 -0.526870869 1949 0.513820141 -0.486860462 1948 0.451671565 -0.467077608 1947 0.637346747 -0.490004389 1946 1.436635012 -0.606748345 1945 1.718383031 -0.601313619 1944 1.7885381 -0.624908325 1943 1.911146523 -0.640110304 1942 1.83755914 -0.636322471 1941 1.74859807 -0.6531828 1940 1.582013122 -0.68689964 1939 1.648525765 -0.638336277 1938 1.536103252 -0.625724656 1937 1.658286725 -0.604987403 1936 1.293938958 -0.548777495 1935 1.378182127 -0.58938288 1934 1.346053187 -0.574981943 1933 1.40380313 -0.548250467 1932 1.371751271 -0.578839591 1931 1.373956055 -0.557519747 1930 1.426194275 -0.56073448 1929 1.272541913 -0.486239158 1928 0.701984673 -0.413912424 1927 0.621806061 -0.402431595 1926 0.55618579 -0.43167601 1925 0.461542375 -0.461884885 1924 0.512251308 -0.530832396 1923 0.745616816 -0.531902248 1922 0.798922673 -0.533271293 1921 0.701587255 -0.564304418 1920 0.706140638 -0.590914923 1919 0.722401574 -0.65140853 1918 0.77216734 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