# northamerica_usa_me021 - Reed Pond - 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_me021 - Reed Pond - 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: Reed Pond # Location: # Country: United States # Northernmost_Latitude: 46.23 # Southernmost_Latitude: 46.23 # Easternmost_Longitude: -69.0 # Westernmost_Longitude: -69.0 # Elevation: 250 m #-------------------- # Data_Collection # Collection_Name: northamerica_usa_me021B # Earliest_Year: 1740 # Most_Recent_Year: 1986 # Time_Unit: y_ad # Core_Length: # Notes: {"sensitivity":"temperature"}{"T1":"3.79206351929"}{"T2":"19.4414929038"}{"M1":"0.0225495984725"}{"M2":"0.319186832635"} #-------------------- # Species # Species_Name: eastern hemlock # Species_Code: TSCA #-------------------- # 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 1740 0.791 1741 0.324 1742 0.846 1743 0.874 1744 0.853 1745 0.943 1746 0.839 1747 1.166 1748 0.97 1749 0.977 1750 1.188 1751 1.192 1752 0.91 1753 1.131 1754 1.306 1755 1.059 1756 1.124 1757 0.604 1758 0.587 1759 0.774 1760 0.483 1761 0.469 1762 0.427 1763 0.585 1764 0.943 1765 0.951 1766 0.997 1767 0.739 1768 0.771 1769 0.77 1770 0.621 1771 0.972 1772 1.013 1773 1.176 1774 1.104 1775 1.239 1776 1.155 1777 1.514 1778 1.096 1779 0.998 1780 1.191 1781 0.511 1782 1.154 1783 1.02 1784 1.587 1785 1.334 1786 1.138 1787 0.603 1788 0.997 1789 0.979 1790 0.884 1791 0.934 1792 0.675 1793 0.81 1794 0.632 1795 0.616 1796 0.777 1797 1.122 1798 1.079 1799 1.259 1800 1.27 1801 1.599 1802 1.393 1803 1.531 1804 1.674 1805 1.742 1806 0.828 1807 0.71 1808 0.279 1809 0.141 1810 -0.105 1811 0.188 1812 0.314 1813 0.329 1814 0.459 1815 0.822 1816 0.805 1817 0.806 1818 0.63 1819 0.833 1820 0.731 1821 0.76 1822 0.98 1823 1.083 1824 1.199 1825 1.363 1826 1.101 1827 1.319 1828 1.243 1829 1.258 1830 1.864 1831 1.663 1832 1.404 1833 0.963 1834 1.532 1835 1.107 1836 0.826 1837 0.728 1838 0.635 1839 0.743 1840 1.007 1841 0.721 1842 0.66 1843 0.88 1844 0.89 1845 1.082 1846 0.77 1847 0.545 1848 0.826 1849 0.546 1850 0.692 1851 0.845 1852 0.635 1853 0.778 1854 0.766 1855 0.978 1856 1.071 1857 1.154 1858 1.226 1859 0.709 1860 0.794 1861 0.873 1862 0.816 1863 0.843 1864 0.991 1865 1.005 1866 1.139 1867 1.231 1868 0.705 1869 1.009 1870 1.005 1871 0.946 1872 0.608 1873 0.857 1874 0.918 1875 0.794 1876 0.447 1877 0.714 1878 0.933 1879 1.102 1880 1.463 1881 1.247 1882 1.284 1883 0.979 1884 1.435 1885 1.287 1886 1.525 1887 1.235 1888 1.011 1889 1.149 1890 1.118 1891 1.188 1892 1.322 1893 1.401 1894 1.665 1895 1.468 1896 1.501 1897 1.326 1898 1.399 1899 1.25 1900 1.164 1901 0.917 1902 1.17 1903 1.523 1904 1.354 1905 1.198 1906 1.46 1907 1.017 1908 1.202 1909 0.927 1910 1.426 1911 0.962 1912 1.116 1913 1.144 1914 0.637 1915 0.494 1916 0.221 1917 0.046 1918 0.149 1919 0.31 1920 0.617 1921 0.522 1922 0.608 1923 0.484 1924 0.736 1925 0.744 1926 0.696 1927 0.814 1928 0.842 1929 0.976 1930 1.172 1931 1.429 1932 1.514 1933 1.344 1934 0.732 1935 1.081 1936 0.9 1937 1.044 1938 0.913 1939 1.083 1940 0.846 1941 0.899 1942 1.017 1943 1.107 1944 1.044 1945 1.239 1946 1.448 1947 1.37 1948 0.892 1949 1.243 1950 1.119 1951 1.054 1952 1.039 1953 0.908 1954 1.155 1955 1.559 1956 0.966 1957 1.085 1958 1.116 1959 0.959 1960 0.666 1961 0.799 1962 0.869 1963 1.245 1964 0.87 1965 0.965 1966 0.932 1967 1.203 1968 1.143 1969 1.248 1970 1.103 1971 1.013 1972 1.094 1973 1.308 1974 1.067 1975 0.753 1976 0.423 1977 0.787 1978 1.077 1979 0.811 1980 0.968 1981 0.584 1982 0.593 1983 0.74 1984 0.577 1985 0.794 1986 0.669