# northamerica_usa_or006 - Spring Canyon Oregon - 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: northamerica_usa_or006 - Spring Canyon Oregon - 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: Spring Canyon Oregon # Location: # Country: United States # Northernmost_Latitude: 44.9 # Southernmost_Latitude: 44.9 # Easternmost_Longitude: -118.93 # Westernmost_Longitude: -118.93 # Elevation: 1366 m #-------------------- # Data_Collection # Collection_Name: northamerica_usa_or006B # Earliest_Year: 1737 # Most_Recent_Year: 1982 # Time_Unit: y_ad # Core_Length: # Notes: {"sensitivity":"moisture"}{"T1":"3.96699637943"}{"T2":"16.0126585231"}{"M1":"0.0233831597592"}{"M2":"0.487802818441"} #-------------------- # Species # Species_Name: western juniper # Species_Code: JUOC #-------------------- # 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 1737 1.13 1738 1.495 1739 1.124 1740 0.958 1741 0.457 1742 0.899 1743 1.243 1744 1.004 1745 0.996 1746 1.012 1747 1.127 1748 1.024 1749 1.352 1750 1.191 1751 1.089 1752 1.276 1753 0.793 1754 0.678 1755 1.151 1756 0.82 1757 0.708 1758 1.353 1759 1.24 1760 1.512 1761 1.267 1762 1.096 1763 1.227 1764 0.66 1765 1.026 1766 1.283 1767 1.464 1768 1.191 1769 0.994 1770 1.278 1771 1.07 1772 0.854 1773 1.125 1774 1.056 1775 1.182 1776 0.887 1777 0.865 1778 0.827 1779 0.808 1780 0.795 1781 1.08 1782 0.831 1783 0.829 1784 1.007 1785 1.071 1786 0.932 1787 0.525 1788 0.717 1789 0.883 1790 0.746 1791 1.309 1792 0.955 1793 0.985 1794 0.675 1795 0.802 1796 0.737 1797 0.65 1798 1.007 1799 1.246 1800 0.754 1801 1.191 1802 0.948 1803 1.096 1804 0.914 1805 1.036 1806 1.023 1807 0.765 1808 0.902 1809 1.213 1810 0.889 1811 0.943 1812 1.05 1813 1.013 1814 1.338 1815 1.092 1816 1.21 1817 0.839 1818 1.162 1819 0.969 1820 1.105 1821 1.023 1822 1.117 1823 1.264 1824 1.158 1825 1.496 1826 1.071 1827 0.735 1828 0.805 1829 1.207 1830 0.842 1831 0.595 1832 1.053 1833 0.898 1834 0.698 1835 1.073 1836 0.559 1837 0.737 1838 0.772 1839 1.196 1840 0.532 1841 1.181 1842 1.023 1843 0.792 1844 0.797 1845 0.949 1846 0.741 1847 0.724 1848 0.986 1849 0.574 1850 0.735 1851 1.193 1852 0.729 1853 1.034 1854 1.174 1855 1.377 1856 1.274 1857 1.148 1858 1.245 1859 0.668 1860 1.297 1861 1.321 1862 1.16 1863 1.119 1864 1.323 1865 0.682 1866 0.971 1867 0.588 1868 1.015 1869 0.784 1870 1.017 1871 0.739 1872 0.565 1873 1.219 1874 0.897 1875 1.565 1876 0.866 1877 1.453 1878 1.041 1879 1.021 1880 0.584 1881 0.977 1882 0.721 1883 0.892 1884 1.246 1885 1.412 1886 0.665 1887 0.646 1888 0.982 1889 1.037 1890 0.71 1891 1.231 1892 0.942 1893 0.813 1894 1.172 1895 0.809 1896 1.037 1897 1.166 1898 1.369 1899 0.953 1900 1.776 1901 1.144 1902 1.083 1903 1.042 1904 1.149 1905 1.238 1906 1.376 1907 1.446 1908 1.375 1909 1.252 1910 0.925 1911 1.275 1912 1.265 1913 1.508 1914 1.666 1915 1.753 1916 1.449 1917 0.679 1918 0.782 1919 0.777 1920 0.845 1921 1.252 1922 0.896 1923 1.355 1924 0.57 1925 0.551 1926 0.315 1927 0.55 1928 0.346 1929 0.586 1930 0.432 1931 0.332 1932 0.507 1933 0.526 1934 1.016 1935 0.842 1936 0.751 1937 0.876 1938 0.707 1939 0.859 1940 0.616 1941 1.504 1942 1.335 1943 1.096 1944 0.745 1945 0.701 1946 0.958 1947 1.028 1948 1.267 1949 0.753 1950 0.687 1951 0.576 1952 0.618 1953 0.891 1954 1.343 1955 0.862 1956 1.165 1957 1.16 1958 1.355 1959 0.847 1960 1.026 1961 1.016 1962 0.932 1963 0.801 1964 1.216 1965 1.007 1966 0.958 1967 1.154 1968 0.878 1969 1.393 1970 1.261 1971 1.267 1972 0.886 1973 0.792 1974 0.822 1975 0.654 1976 0.977 1977 1.602 1978 1.419 1979 0.72 1980 1.367 1981 1.403 1982 0.766