# northamerica_usa_me016 - Hamlin Ridge Mount Katahdin - 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_me016 - Hamlin Ridge Mount Katahdin - 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: Hamlin Ridge Mount Katahdin # Location: # Country: United States # Northernmost_Latitude: 45.92 # Southernmost_Latitude: 45.92 # Easternmost_Longitude: -68.9 # Westernmost_Longitude: -68.9 # Elevation: 400 m #-------------------- # Data_Collection # Collection_Name: northamerica_usa_me016B # Earliest_Year: 1690 # Most_Recent_Year: 1981 # Time_Unit: y_ad # Core_Length: # Notes: {"sensitivity":"temperature"}{"T1":"5.33649928232"}{"T2":"18.5260032601"}{"M1":"0.0224247938798"}{"M2":"0.280944348703"} #-------------------- # Species # Species_Name: red spruce # Species_Code: PCRU #-------------------- # 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 1690 0.984 1691 0.998 1692 1.174 1693 0.817 1694 1.191 1695 1.004 1696 0.83 1697 0.798 1698 1.078 1699 1.002 1700 0.65 1701 0.683 1702 0.748 1703 0.73 1704 0.879 1705 0.698 1706 1.166 1707 1.293 1708 1.088 1709 1.034 1710 0.792 1711 0.544 1712 0.832 1713 0.568 1714 0.604 1715 0.816 1716 0.577 1717 0.531 1718 0.887 1719 0.826 1720 0.645 1721 0.881 1722 0.82 1723 0.564 1724 0.879 1725 0.978 1726 0.827 1727 0.985 1728 0.904 1729 1.179 1730 0.978 1731 1.022 1732 0.774 1733 0.779 1734 0.887 1735 0.741 1736 0.668 1737 0.72 1738 0.752 1739 0.607 1740 0.584 1741 0.706 1742 0.847 1743 0.827 1744 0.928 1745 1.01 1746 1.259 1747 1.292 1748 0.852 1749 0.876 1750 0.818 1751 0.811 1752 0.838 1753 1.048 1754 1.117 1755 1.175 1756 1.06 1757 0.95 1758 0.895 1759 0.933 1760 0.778 1761 1.146 1762 1.14 1763 0.654 1764 0.462 1765 0.599 1766 0.75 1767 0.691 1768 0.668 1769 0.929 1770 0.927 1771 0.848 1772 0.944 1773 0.853 1774 0.807 1775 0.96 1776 0.72 1777 1.039 1778 0.931 1779 0.896 1780 0.854 1781 0.739 1782 0.932 1783 0.758 1784 0.954 1785 1.106 1786 1.253 1787 1.088 1788 1.066 1789 0.862 1790 1.003 1791 1.091 1792 0.88 1793 1.104 1794 0.902 1795 0.889 1796 0.913 1797 0.892 1798 0.997 1799 0.82 1800 0.918 1801 1.174 1802 0.817 1803 1.052 1804 1.177 1805 1.079 1806 1.396 1807 1.709 1808 0.975 1809 0.595 1810 0.594 1811 0.629 1812 0.926 1813 1.142 1814 1.006 1815 1.197 1816 1.14 1817 1.498 1818 1.307 1819 1.482 1820 0.969 1821 1.213 1822 1.425 1823 0.993 1824 0.989 1825 1.176 1826 0.971 1827 1.038 1828 0.881 1829 1.124 1830 1.346 1831 1.075 1832 1.173 1833 1.365 1834 1.448 1835 1.162 1836 1.144 1837 1.195 1838 1.026 1839 0.873 1840 1.029 1841 1.064 1842 1.052 1843 0.946 1844 0.805 1845 1.079 1846 1.17 1847 1.087 1848 1.272 1849 1.04 1850 1.178 1851 1.143 1852 1.204 1853 1.01 1854 1.089 1855 1.174 1856 1.103 1857 1.012 1858 1.187 1859 1.279 1860 1.248 1861 1.318 1862 1.274 1863 1.232 1864 1.208 1865 1.044 1866 1.033 1867 1.299 1868 1.04 1869 1.076 1870 1.113 1871 1.184 1872 0.858 1873 0.779 1874 0.738 1875 0.925 1876 0.758 1877 0.846 1878 0.819 1879 1.103 1880 1.017 1881 0.814 1882 0.879 1883 0.943 1884 0.912 1885 1.232 1886 1.381 1887 1.249 1888 1.242 1889 1.255 1890 1.195 1891 1.241 1892 1.25 1893 1.164 1894 1.031 1895 1.105 1896 1.21 1897 0.997 1898 1.11 1899 1.088 1900 1.121 1901 0.959 1902 0.93 1903 1.025 1904 1.189 1905 0.969 1906 0.941 1907 0.806 1908 0.884 1909 0.941 1910 0.992 1911 1.192 1912 1.104 1913 1.152 1914 0.799 1915 0.57 1916 0.775 1917 0.735 1918 0.474 1919 0.467 1920 0.603 1921 0.538 1922 0.709 1923 0.698 1924 1.033 1925 0.919 1926 0.869 1927 1.002 1928 1.009 1929 0.896 1930 0.997 1931 1.263 1932 1.512 1933 1.27 1934 1.228 1935 1.158 1936 0.816 1937 1.05 1938 0.713 1939 0.956 1940 0.65 1941 0.876 1942 0.818 1943 0.713 1944 0.694 1945 0.692 1946 0.73 1947 0.788 1948 0.811 1949 1.076 1950 0.991 1951 0.972 1952 0.805 1953 0.986 1954 0.76 1955 0.982 1956 0.817 1957 1.107 1958 1.088 1959 0.887 1960 0.779 1961 1.029 1962 0.761 1963 0.969 1964 0.841 1965 0.655 1966 0.658 1967 0.725 1968 0.57 1969 0.804 1970 0.865 1971 1.051 1972 0.908 1973 0.699 1974 0.809 1975 0.972 1976 0.826 1977 0.467 1978 0.645 1979 0.477 1980 0.451 1981 0.285