# europe_swit163w - Toppwald BE, Fi.Vergl.Pr - Breitenmoser Tree Ring Chronology Data #----------------------------------------------------------------------- # World Data Center for Paleoclimatology, Boulder # and # NOAA Paleoclimatology Program #----------------------------------------------------------------------- # 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: # # Original_Source_URL: # # Description/Documentation lines begin with # # Data lines have no # # # Archive: Tree Rings #-------------------- # Contribution_Date # Date: 2016-01-07 #-------------------- # Title # Study_Name: europe_swit163w - Toppwald BE, Fi.Vergl.Pr - Breitenmoser Tree Ring Chronology Data #-------------------- # Investigators # Investigators: Breitenmoser, P.; Bronnimann, S.; Frank, D. #-------------------- # Description_and_Notes # Description: Data from Breitenmoser 2014 Journal of past Climate supplementary, see publication for ARSTAN standardization details #-------------------- # Publication # Authors: Breitenmoser, P.; Bronnimann, S.; Frank, D. # Published_Date_or_Year: 2014-03-11 # Published_Title: Forward modelling of tree-ring width and comparison with a global network of tree-ring chronologies # Journal_Name: Climate of the Past # Volume: 10 # Edition: # Issue: # Pages: 437-449 # DOI: 10.5194/cp-10-437-2014 # Online_Resource: www.clim-past.net/10/437/2014/ # Full_Citation: # Abstract: We investigate relationships between climate and tree-ring data on a global scale using the process-based Vaganov–Shashkin Lite (VSL) forward model of tree-ring width formation. The VSL model requires as inputs only latitude, monthly mean temperature, and monthly accumulated precipitation. Hence, this simple, process-based model enables ring-width simulation at any location where monthly climate records exist. In this study, we analyse the growth response of simulated tree rings to monthly climate conditions obtained from the CRU TS3.1 data set back to 1901. Our key aims are (a) to assess the VSL model performance by examining the relations between simulated and observed growth at 2287 globally distributed sites, (b) indentify optimal growth parameters found during the model calibration, and (c) to evaluate the potential of the VSL model as an observation operator for data-assimilation-based reconstructions of climate from tree-ring width. The assessment of the growth-onset threshold temperature of approximately 4–6 C for most sites and species using a Bayesian estimation approach complements other studies on the lower temperature limits where plant growth may be sustained. Our results suggest that the VSL model skilfully simulates site level treering series in response to climate forcing for a wide range of environmental conditions and species. Spatial aggregation of the tree-ring chronologies to reduce non-climatic noise at the site level yielded notable improvements in the coherence between modelled and actual growth. The resulting distinct and coherent patterns of significant relationships between the aggregated and simulated series further demonstrate the VSL model’s ability to skilfully capture the climatic signal contained in tree-ring series. Finally, we propose that the VSL model can be used as an observation operator in data assimilation approaches to reconstruct past climate. #-------------------- # Funding_Agency # Funding_Agency_Name: Swiss National Science Foundation # Grant: #-------------------- # Site_Information # Site_Name: Toppwald BE, Fi.Vergl.Pr # Location: # Country: Switzerland # Northernmost_Latitude: 46.87 # Southernmost_Latitude: 46.87 # Easternmost_Longitude: 7.68 # Westernmost_Longitude: 7.68 # Elevation: 875 m #-------------------- # Data_Collection # Collection_Name: europe_swit163wB # Earliest_Year: 1870 # Most_Recent_Year: 1979 # Time_Unit: y_ad # Core_Length: # Notes: {"sensitivity":"temperature"}{"T1":"4.61051493243"}{"T2":"14.1726108442"}{"M1":"0.0228304734635"}{"M2":"0.455903111116"} #-------------------- # Species # Species_Name: Norway spruce # Species_Code: PCAB #-------------------- # Chronology: # # # #-------------------- # Variables # # Data variables follow that are preceded by ## in columns one and two. # Data line variables format: Variables list, one per line, shortname-tab-longname-tab-longname components (9 components: what, material, error, units, seasonality, archive, detail, method, C or N for Character or Numeric data) # ##age age, , ,years AD, , , , ,N ##trsgi tree ring standardized growth index, tree ring, ,percent relative to mean growth, , Tree Rings, , ,N # #-------------------- # Data: # Data lines follow (have no #) # Data line format - tab-delimited text, variable short name as header # Missing Values: nan # age trsgi 1870 0.892 1871 0.886 1872 0.85 1873 1.074 1874 0.926 1875 0.991 1876 0.987 1877 1.302 1878 1.477 1879 1.14 1880 1.115 1881 1.041 1882 1.145 1883 1.113 1884 1.004 1885 0.893 1886 0.875 1887 0.766 1888 0.832 1889 0.672 1890 0.871 1891 0.914 1892 0.905 1893 1.146 1894 1.013 1895 0.998 1896 0.989 1897 1.068 1898 0.964 1899 0.915 1900 0.905 1901 1.017 1902 0.985 1903 1.17 1904 1.058 1905 1.028 1906 0.927 1907 0.946 1908 1.116 1909 1.074 1910 1.081 1911 1.046 1912 1.17 1913 1.117 1914 1.161 1915 1.257 1916 1.286 1917 1.16 1918 1.162 1919 1.028 1920 0.894 1921 0.846 1922 0.736 1923 0.878 1924 0.783 1925 0.845 1926 0.877 1927 0.993 1928 0.846 1929 0.71 1930 0.882 1931 0.843 1932 0.997 1933 0.852 1934 0.953 1935 0.945 1936 0.771 1937 0.858 1938 0.839 1939 0.938 1940 0.874 1941 0.734 1942 1.012 1943 1.024 1944 0.897 1945 0.901 1946 0.736 1947 0.983 1948 0.75 1949 0.699 1950 0.853 1951 0.947 1952 1.006 1953 0.978 1954 0.877 1955 1.129 1956 0.91 1957 0.898 1958 0.91 1959 0.933 1960 0.907 1961 1.139 1962 0.956 1963 1.108 1964 1.254 1965 1.055 1966 1.013 1967 1.037 1968 1.132 1969 1.229 1970 1.019 1971 0.946 1972 1.203 1973 1.064 1974 0.977 1975 1.079 1976 0.954 1977 1.107 1978 1.143 1979 1.141