# northamerica_usa_wa069 - Hart's Pass N1 - 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_wa069 - Hart's Pass N1 - 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: Hart's Pass N1 # Location: # Country: United States # Northernmost_Latitude: 48.7 # Southernmost_Latitude: 48.7 # Easternmost_Longitude: -120.65 # Westernmost_Longitude: -120.65 # Elevation: 1925 m #-------------------- # Data_Collection # Collection_Name: northamerica_usa_wa069B # Earliest_Year: 1724 # Most_Recent_Year: 1990 # Time_Unit: y_ad # Core_Length: # Notes: {"sensitivity":"temperature"}{"T1":"6.12317291797"}{"T2":"16.5728205102"}{"M1":"0.0227211748953"}{"M2":"0.397030115966"} #-------------------- # Species # Species_Name: subalpine larch # Species_Code: LALY #-------------------- # 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 1724 1.307 1725 1.106 1726 1.248 1727 1.205 1728 0.969 1729 1.196 1730 1.324 1731 0.957 1732 1.083 1733 1.195 1734 1.451 1735 1.133 1736 1.07 1737 0.934 1738 1.054 1739 1.282 1740 1.112 1741 1.241 1742 1.074 1743 1.11 1744 1.029 1745 1.402 1746 1.027 1747 1.339 1748 1.102 1749 1.025 1750 0.916 1751 1.077 1752 0.686 1753 1.317 1754 1.177 1755 1.152 1756 1.421 1757 1.037 1758 0.985 1759 0.844 1760 0.775 1761 0.967 1762 0.79 1763 0.947 1764 0.963 1765 0.76 1766 0.85 1767 1.0 1768 1.16 1769 0.957 1770 0.86 1771 0.994 1772 0.957 1773 1.057 1774 1.052 1775 0.791 1776 0.883 1777 0.839 1778 0.826 1779 0.83 1780 0.833 1781 0.974 1782 0.978 1783 1.23 1784 0.819 1785 0.742 1786 0.971 1787 0.911 1788 0.961 1789 0.862 1790 1.426 1791 0.937 1792 0.883 1793 0.757 1794 1.252 1795 0.963 1796 1.072 1797 0.894 1798 1.389 1799 0.892 1800 0.844 1801 0.795 1802 1.335 1803 1.239 1804 0.907 1805 0.86 1806 0.657 1807 0.991 1808 0.947 1809 1.033 1810 0.637 1811 0.838 1812 0.982 1813 0.772 1814 0.862 1815 0.772 1816 0.768 1817 1.175 1818 0.754 1819 0.883 1820 0.777 1821 0.624 1822 0.847 1823 0.919 1824 0.377 1825 0.879 1826 0.91 1827 0.837 1828 0.994 1829 1.022 1830 1.161 1831 1.119 1832 0.517 1833 1.022 1834 1.32 1835 0.94 1836 0.763 1837 0.869 1838 0.533 1839 0.956 1840 0.866 1841 1.116 1842 1.137 1843 1.108 1844 0.866 1845 1.11 1846 1.129 1847 1.107 1848 1.261 1849 0.826 1850 1.031 1851 1.249 1852 1.476 1853 0.955 1854 0.722 1855 1.292 1856 0.873 1857 1.064 1858 0.991 1859 1.137 1860 1.025 1861 1.171 1862 1.155 1863 1.407 1864 0.861 1865 1.098 1866 0.976 1867 0.792 1868 0.998 1869 1.049 1870 0.934 1871 1.321 1872 1.551 1873 1.513 1874 1.254 1875 1.199 1876 1.066 1877 0.662 1878 1.149 1879 0.634 1880 0.702 1881 0.775 1882 1.078 1883 0.938 1884 0.847 1885 1.062 1886 1.269 1887 1.211 1888 0.94 1889 1.129 1890 0.807 1891 0.904 1892 1.126 1893 0.721 1894 1.176 1895 1.193 1896 1.167 1897 0.519 1898 0.774 1899 0.962 1900 0.769 1901 0.789 1902 0.635 1903 0.785 1904 0.842 1905 0.616 1906 0.671 1907 0.862 1908 1.005 1909 0.684 1910 0.987 1911 0.993 1912 0.895 1913 0.813 1914 1.171 1915 0.759 1916 0.603 1917 0.996 1918 1.224 1919 1.388 1920 1.468 1921 1.662 1922 1.78 1923 1.153 1924 1.215 1925 1.027 1926 0.932 1927 0.819 1928 1.297 1929 1.121 1930 0.9 1931 0.905 1932 0.95 1933 1.087 1934 1.594 1935 1.247 1936 1.392 1937 1.295 1938 1.493 1939 1.014 1940 1.443 1941 1.063 1942 1.209 1943 1.099 1944 0.951 1945 0.945 1946 0.204 1947 0.78 1948 0.735 1949 0.446 1950 0.544 1951 0.602 1952 0.452 1953 0.567 1954 0.409 1955 0.535 1956 0.248 1957 0.993 1958 0.883 1959 0.477 1960 0.8 1961 1.168 1962 0.639 1963 1.064 1964 0.942 1965 1.082 1966 1.029 1967 1.331 1968 0.86 1969 1.149 1970 1.21 1971 0.776 1972 0.781 1973 0.971 1974 0.89 1975 1.442 1976 1.014 1977 1.365 1978 1.302 1979 0.826 1980 0.881 1981 1.101 1982 0.95 1983 0.767 1984 1.283 1985 1.31 1986 0.963 1987 1.025 1988 0.948 1989 1.059 1990 1.065