# northamerica_usa_ak091 - Rock Tor - 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_ak091 - Rock Tor - 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: Rock Tor # Location: # Country: United States # Northernmost_Latitude: 61.05 # Southernmost_Latitude: 61.05 # Easternmost_Longitude: -147.1 # Westernmost_Longitude: -147.1 # Elevation: 90 m #-------------------- # Data_Collection # Collection_Name: northamerica_usa_ak091B # Earliest_Year: 1600 # Most_Recent_Year: 2002 # Time_Unit: y_ad # Core_Length: # Notes: {"sensitivity":"temperature"}{"T1":"6.68491673572"}{"T2":"17.1946834715"}{"M1":"0.0223519108138"}{"M2":"0.395719878096"} #-------------------- # Species # Species_Name: mountain hemlock # Species_Code: TSME #-------------------- # 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 1600 0.699 1601 0.803 1602 0.453 1603 1.04 1604 0.957 1605 0.926 1606 1.15 1607 1.329 1608 1.285 1609 1.084 1610 1.35 1611 1.344 1612 1.408 1613 0.939 1614 1.186 1615 0.884 1616 1.191 1617 1.194 1618 0.535 1619 0.664 1620 0.114 1621 0.447 1622 0.814 1623 0.681 1624 0.597 1625 0.695 1626 0.901 1627 1.153 1628 1.307 1629 1.189 1630 1.169 1631 1.158 1632 1.571 1633 1.259 1634 1.128 1635 1.365 1636 1.067 1637 1.036 1638 0.887 1639 0.381 1640 0.969 1641 0.65 1642 0.408 1643 0.779 1644 0.616 1645 0.713 1646 0.92 1647 0.938 1648 1.001 1649 1.106 1650 1.479 1651 1.733 1652 1.184 1653 1.06 1654 1.086 1655 0.913 1656 0.955 1657 0.974 1658 0.838 1659 0.918 1660 1.03 1661 0.936 1662 0.423 1663 0.488 1664 0.534 1665 0.685 1666 0.814 1667 1.011 1668 1.191 1669 0.996 1670 1.232 1671 1.48 1672 1.177 1673 0.988 1674 0.775 1675 0.982 1676 0.779 1677 0.354 1678 0.542 1679 0.386 1680 0.686 1681 0.77 1682 0.721 1683 1.285 1684 1.33 1685 1.578 1686 1.419 1687 1.291 1688 1.308 1689 1.05 1690 0.833 1691 0.805 1692 1.273 1693 1.099 1694 1.299 1695 1.1 1696 0.775 1697 0.238 1698 0.129 1699 -0.023 1700 0.365 1701 0.469 1702 0.6 1703 0.74 1704 0.915 1705 1.001 1706 0.798 1707 0.785 1708 0.635 1709 0.767 1710 0.551 1711 0.564 1712 0.917 1713 1.027 1714 0.666 1715 1.072 1716 0.563 1717 0.598 1718 1.077 1719 0.994 1720 1.139 1721 1.057 1722 1.365 1723 1.493 1724 1.145 1725 1.127 1726 0.843 1727 0.928 1728 1.22 1729 1.397 1730 1.095 1731 1.074 1732 1.17 1733 1.054 1734 0.765 1735 0.742 1736 0.784 1737 0.893 1738 0.642 1739 1.259 1740 0.98 1741 1.307 1742 1.233 1743 1.205 1744 0.421 1745 0.815 1746 0.414 1747 1.055 1748 0.816 1749 1.33 1750 1.37 1751 1.264 1752 0.886 1753 0.824 1754 0.375 1755 0.315 1756 0.537 1757 0.741 1758 0.948 1759 0.765 1760 1.057 1761 1.242 1762 1.001 1763 1.424 1764 0.755 1765 1.141 1766 0.921 1767 1.093 1768 0.773 1769 0.966 1770 0.816 1771 0.837 1772 1.121 1773 1.009 1774 1.321 1775 0.724 1776 0.847 1777 0.743 1778 0.682 1779 1.066 1780 1.047 1781 1.042 1782 1.046 1783 1.004 1784 1.158 1785 1.424 1786 1.169 1787 1.202 1788 1.3 1789 1.031 1790 0.854 1791 0.882 1792 1.289 1793 1.257 1794 1.176 1795 1.588 1796 1.008 1797 1.584 1798 1.379 1799 1.627 1800 0.957 1801 1.271 1802 1.304 1803 1.403 1804 1.81 1805 1.553 1806 1.23 1807 1.128 1808 1.414 1809 0.912 1810 1.005 1811 0.872 1812 0.861 1813 0.659 1814 0.48 1815 0.859 1816 1.138 1817 1.023 1818 1.219 1819 1.368 1820 1.516 1821 1.48 1822 1.58 1823 1.586 1824 1.694 1825 1.904 1826 1.395 1827 0.847 1828 1.458 1829 1.438 1830 1.092 1831 0.853 1832 1.171 1833 1.379 1834 1.039 1835 1.125 1836 1.062 1837 1.077 1838 1.449 1839 1.349 1840 1.401 1841 1.641 1842 1.328 1843 1.1 1844 1.253 1845 1.227 1846 1.457 1847 1.109 1848 1.097 1849 0.623 1850 0.652 1851 0.876 1852 1.379 1853 1.369 1854 1.094 1855 1.136 1856 0.918 1857 1.218 1858 1.235 1859 0.993 1860 0.802 1861 0.823 1862 0.405 1863 0.47 1864 0.781 1865 0.893 1866 1.202 1867 1.33 1868 1.24 1869 1.251 1870 1.534 1871 0.982 1872 1.666 1873 1.476 1874 0.92 1875 1.129 1876 0.34 1877 0.226 1878 0.551 1879 0.493 1880 0.494 1881 0.812 1882 0.705 1883 0.451 1884 0.965 1885 1.012 1886 0.846 1887 0.506 1888 0.721 1889 0.843 1890 0.658 1891 0.676 1892 1.052 1893 0.95 1894 0.623 1895 0.591 1896 0.741 1897 0.456 1898 0.548 1899 0.615 1900 0.862 1901 0.54 1902 0.744 1903 0.651 1904 0.673 1905 1.185 1906 1.071 1907 0.803 1908 0.774 1909 0.986 1910 0.609 1911 1.037 1912 0.961 1913 0.954 1914 1.114 1915 1.499 1916 1.158 1917 1.182 1918 1.308 1919 1.111 1920 1.108 1921 1.381 1922 1.115 1923 1.172 1924 1.345 1925 1.188 1926 1.464 1927 1.153 1928 1.079 1929 1.166 1930 1.357 1931 1.141 1932 1.051 1933 1.142 1934 1.107 1935 1.275 1936 1.114 1937 0.589 1938 0.515 1939 0.697 1940 0.949 1941 1.247 1942 1.516 1943 1.22 1944 0.886 1945 1.15 1946 0.844 1947 1.05 1948 1.107 1949 1.013 1950 1.153 1951 0.858 1952 0.903 1953 1.043 1954 0.711 1955 0.33 1956 0.401 1957 0.83 1958 0.799 1959 0.785 1960 1.079 1961 1.121 1962 1.166 1963 1.206 1964 1.003 1965 0.9 1966 0.936 1967 0.777 1968 0.863 1969 0.755 1970 0.623 1971 0.789 1972 0.592 1973 0.265 1974 0.724 1975 0.504 1976 0.632 1977 0.78 1978 0.67 1979 0.643 1980 0.622 1981 1.005 1982 0.998 1983 1.105 1984 1.098 1985 1.027 1986 0.993 1987 0.75 1988 0.888 1989 0.736 1990 0.665 1991 0.784 1992 0.798 1993 0.801 1994 0.969 1995 1.038 1996 1.208 1997 1.259 1998 0.877 1999 0.913 2000 0.71 2001 0.936 2002 1.004