# europe_fran028 - Le Tournairet - 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_fran028 - Le Tournairet - 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: Le Tournairet # Location: # Country: France # Northernmost_Latitude: 43.87 # Southernmost_Latitude: 43.87 # Easternmost_Longitude: 7.33 # Westernmost_Longitude: 7.33 # Elevation: 2050 m #-------------------- # Data_Collection # Collection_Name: europe_fran028B # Earliest_Year: 1759 # Most_Recent_Year: 1977 # Time_Unit: y_ad # Core_Length: # Notes: {"sensitivity":"temperature"}{"T1":"6.4033585679"}{"T2":"19.7200730063"}{"M1":"0.0221687408738"}{"M2":"0.297288936539"} #-------------------- # 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 1759 1.058 1760 1.045 1761 1.032 1762 0.98 1763 0.916 1764 0.964 1765 0.916 1766 0.947 1767 0.627 1768 0.813 1769 0.936 1770 0.753 1771 0.829 1772 1.002 1773 0.925 1774 0.969 1775 0.902 1776 0.993 1777 0.777 1778 0.943 1779 0.806 1780 0.967 1781 1.198 1782 1.302 1783 1.186 1784 1.385 1785 1.339 1786 1.214 1787 1.218 1788 1.251 1789 1.185 1790 1.196 1791 1.352 1792 1.164 1793 1.072 1794 0.854 1795 0.868 1796 0.743 1797 0.871 1798 0.787 1799 0.758 1800 1.024 1801 0.904 1802 1.055 1803 0.946 1804 0.971 1805 0.908 1806 1.023 1807 1.157 1808 0.806 1809 0.967 1810 0.949 1811 0.935 1812 0.853 1813 0.702 1814 1.149 1815 1.034 1816 0.992 1817 0.901 1818 0.768 1819 0.818 1820 0.917 1821 0.918 1822 1.005 1823 1.002 1824 0.97 1825 0.891 1826 0.967 1827 0.885 1828 0.951 1829 0.944 1830 0.791 1831 1.1 1832 1.12 1833 0.953 1834 1.098 1835 0.841 1836 1.096 1837 1.095 1838 1.023 1839 0.824 1840 0.792 1841 0.922 1842 1.158 1843 1.07 1844 1.161 1845 1.205 1846 1.34 1847 1.105 1848 1.172 1849 1.157 1850 1.075 1851 1.305 1852 1.216 1853 1.376 1854 1.366 1855 1.526 1856 1.546 1857 1.233 1858 1.083 1859 1.123 1860 0.72 1861 0.788 1862 0.509 1863 0.649 1864 0.713 1865 0.825 1866 0.862 1867 1.033 1868 0.683 1869 0.818 1870 0.984 1871 1.042 1872 1.069 1873 1.099 1874 1.016 1875 0.888 1876 0.933 1877 1.035 1878 0.971 1879 0.779 1880 0.659 1881 0.863 1882 0.811 1883 0.772 1884 0.846 1885 1.167 1886 1.118 1887 1.443 1888 1.354 1889 1.601 1890 1.643 1891 1.231 1892 1.336 1893 1.162 1894 1.014 1895 0.988 1896 0.809 1897 0.816 1898 0.795 1899 0.659 1900 0.87 1901 1.099 1902 0.986 1903 1.099 1904 1.242 1905 1.005 1906 1.132 1907 0.924 1908 1.132 1909 0.934 1910 0.902 1911 0.835 1912 0.59 1913 0.763 1914 0.676 1915 0.822 1916 0.956 1917 1.036 1918 1.046 1919 0.849 1920 0.778 1921 0.861 1922 0.666 1923 0.871 1924 0.722 1925 0.68 1926 0.671 1927 0.646 1928 0.852 1929 0.674 1930 0.815 1931 0.865 1932 0.669 1933 0.704 1934 0.916 1935 1.083 1936 1.022 1937 1.135 1938 1.184 1939 1.214 1940 1.333 1941 1.539 1942 1.384 1943 1.148 1944 1.091 1945 1.168 1946 1.092 1947 0.976 1948 0.629 1949 1.093 1950 0.665 1951 0.689 1952 0.691 1953 0.579 1954 0.632 1955 0.644 1956 0.915 1957 0.725 1958 0.877 1959 0.874 1960 1.119 1961 0.915 1962 1.101 1963 1.026 1964 1.436 1965 1.273 1966 1.319 1967 1.197 1968 1.085 1969 1.274 1970 1.043 1971 1.092 1972 0.934 1973 1.109 1974 0.904 1975 0.781 1976 0.831 1977 0.684