# europe_finl020 - Palasjarvi Palastunturi - 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_finl020 - Palasjarvi Palastunturi - 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: Palasjarvi Palastunturi # Location: # Country: Finland # Northernmost_Latitude: 68.03 # Southernmost_Latitude: 68.03 # Easternmost_Longitude: 24.1 # Westernmost_Longitude: 24.1 # Elevation: 270 m #-------------------- # Data_Collection # Collection_Name: europe_finl020B # Earliest_Year: 1798 # Most_Recent_Year: 1978 # Time_Unit: y_ad # Core_Length: # Notes: {"sensitivity":"temperature"}{"T1":"7.22132762755"}{"T2":"20.0386025462"}{"M1":"0.0222511685161"}{"M2":"0.192285047598"} #-------------------- # 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 1798 0.983 1799 0.733 1800 0.926 1801 1.026 1802 0.819 1803 0.662 1804 0.964 1805 0.881 1806 0.411 1807 0.791 1808 0.553 1809 0.302 1810 0.35 1811 0.406 1812 0.414 1813 0.399 1814 0.516 1815 0.572 1816 0.368 1817 0.409 1818 0.62 1819 0.79 1820 0.694 1821 0.663 1822 0.9 1823 1.213 1824 1.329 1825 1.328 1826 1.734 1827 1.441 1828 1.448 1829 1.665 1830 1.387 1831 1.258 1832 1.018 1833 1.278 1834 1.206 1835 1.114 1836 1.213 1837 0.971 1838 1.403 1839 0.998 1840 1.168 1841 1.115 1842 0.933 1843 0.866 1844 0.886 1845 1.04 1846 1.044 1847 1.059 1848 0.816 1849 1.432 1850 1.302 1851 1.384 1852 1.338 1853 1.312 1854 0.67 1855 0.378 1856 0.436 1857 0.412 1858 0.556 1859 0.577 1860 0.911 1861 1.039 1862 1.007 1863 1.219 1864 1.282 1865 1.169 1866 1.105 1867 0.95 1868 1.301 1869 1.185 1870 1.397 1871 1.215 1872 1.313 1873 1.161 1874 0.583 1875 1.062 1876 1.1 1877 1.073 1878 1.016 1879 1.121 1880 0.883 1881 1.039 1882 0.868 1883 0.953 1884 1.016 1885 0.997 1886 1.165 1887 0.744 1888 0.858 1889 1.159 1890 1.052 1891 1.035 1892 1.006 1893 1.134 1894 0.893 1895 0.761 1896 0.941 1897 0.815 1898 0.939 1899 0.726 1900 0.607 1901 0.835 1902 0.534 1903 0.638 1904 0.82 1905 0.933 1906 1.01 1907 1.067 1908 1.147 1909 1.01 1910 0.944 1911 1.078 1912 1.096 1913 1.169 1914 1.348 1915 1.387 1916 1.275 1917 1.203 1918 1.135 1919 1.266 1920 0.998 1921 1.176 1922 1.623 1923 1.367 1924 1.827 1925 1.605 1926 1.423 1927 1.335 1928 0.74 1929 1.157 1930 1.228 1931 0.875 1932 1.118 1933 1.203 1934 1.095 1935 0.964 1936 1.386 1937 1.378 1938 1.224 1939 1.171 1940 1.155 1941 1.195 1942 1.114 1943 1.044 1944 0.9 1945 1.067 1946 0.98 1947 1.16 1948 0.761 1949 0.724 1950 0.999 1951 0.545 1952 0.842 1953 1.06 1954 1.005 1955 0.848 1956 1.011 1957 0.683 1958 0.486 1959 0.543 1960 0.82 1961 0.66 1962 0.673 1963 0.642 1964 0.847 1965 0.774 1966 1.047 1967 0.975 1968 0.867 1969 1.054 1970 0.837 1971 0.671 1972 0.798 1973 0.674 1974 0.548 1975 0.272 1976 0.798 1977 0.632 1978 0.722