# europe_czec001 - Krkonose Mountains Upper Labe Valley Northern Slope - 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_czec001 - Krkonose Mountains Upper Labe Valley Northern Slope - 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: Krkonose Mountains Upper Labe Valley Northern Slope # Location: # Country: Czech Republic # Northernmost_Latitude: 50.75 # Southernmost_Latitude: 50.75 # Easternmost_Longitude: 15.55 # Westernmost_Longitude: 15.55 # Elevation: 1000 m #-------------------- # Data_Collection # Collection_Name: europe_czec001B # Earliest_Year: 1809 # Most_Recent_Year: 1990 # Time_Unit: y_ad # Core_Length: # Notes: {"sensitivity":"temperature"}{"T1":"5.78586883365"}{"T2":"20.1660819585"}{"M1":"0.0225721905718"}{"M2":"0.325029138503"} #-------------------- # 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 1809 1.167 1810 0.9 1811 1.022 1812 0.964 1813 0.997 1814 1.025 1815 0.97 1816 0.973 1817 0.717 1818 0.787 1819 0.829 1820 0.723 1821 0.648 1822 0.975 1823 0.73 1824 0.785 1825 0.958 1826 1.092 1827 1.003 1828 0.98 1829 0.945 1830 0.815 1831 1.112 1832 0.991 1833 1.383 1834 1.081 1835 0.898 1836 0.936 1837 0.926 1838 0.832 1839 1.214 1840 1.021 1841 1.019 1842 1.278 1843 0.902 1844 0.932 1845 1.057 1846 1.188 1847 1.127 1848 1.126 1849 1.019 1850 1.071 1851 0.883 1852 1.084 1853 1.097 1854 1.084 1855 1.098 1856 0.976 1857 1.151 1858 0.9 1859 1.03 1860 0.969 1861 1.019 1862 0.844 1863 1.141 1864 1.082 1865 0.896 1866 0.798 1867 0.745 1868 0.931 1869 0.784 1870 1.054 1871 0.888 1872 0.782 1873 0.95 1874 0.983 1875 1.024 1876 0.969 1877 0.929 1878 0.942 1879 1.007 1880 1.247 1881 1.267 1882 1.032 1883 1.003 1884 1.072 1885 1.067 1886 1.026 1887 1.021 1888 0.838 1889 0.933 1890 0.855 1891 0.736 1892 0.992 1893 1.068 1894 0.992 1895 1.116 1896 0.882 1897 0.97 1898 1.08 1899 1.054 1900 0.943 1901 1.036 1902 0.915 1903 0.843 1904 0.87 1905 0.872 1906 0.598 1907 0.817 1908 1.039 1909 0.944 1910 1.037 1911 1.215 1912 0.959 1913 0.907 1914 1.116 1915 1.025 1916 0.847 1917 1.181 1918 0.755 1919 0.915 1920 0.897 1921 0.972 1922 1.128 1923 0.761 1924 1.119 1925 1.022 1926 0.979 1927 1.123 1928 1.067 1929 1.065 1930 1.013 1931 1.231 1932 0.986 1933 0.852 1934 1.201 1935 1.23 1936 1.146 1937 1.11 1938 1.131 1939 1.214 1940 0.972 1941 0.963 1942 0.672 1943 0.722 1944 0.926 1945 1.021 1946 1.316 1947 1.406 1948 1.038 1949 1.002 1950 1.357 1951 1.04 1952 1.205 1953 1.174 1954 0.928 1955 0.947 1956 0.727 1957 0.915 1958 1.02 1959 1.046 1960 1.041 1961 1.066 1962 1.039 1963 1.271 1964 0.991 1965 0.805 1966 1.13 1967 1.224 1968 1.146 1969 1.193 1970 1.162 1971 0.95 1972 0.989 1973 1.044 1974 0.474 1975 0.927 1976 0.797 1977 0.883 1978 0.685 1979 0.978 1980 0.307 1981 0.37 1982 0.363 1983 0.59 1984 0.516 1985 0.557 1986 0.834 1987 0.765 1988 1.026 1989 1.077 1990 0.95