# asia_nepa011 - BudoRouke - 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: asia_nepa011 - BudoRouke - 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: BudoRouke # Location: # Country: Nepal # Northernmost_Latitude: 27.45 # Southernmost_Latitude: 27.45 # Easternmost_Longitude: 87.17 # Westernmost_Longitude: 87.17 # Elevation: 2970 m #-------------------- # Data_Collection # Collection_Name: asia_nepa011B # Earliest_Year: 1692 # Most_Recent_Year: 1996 # Time_Unit: y_ad # Core_Length: # Notes: {"sensitivity":"temperature"}{"T1":"5.46075522306"}{"T2":"19.3750324545"}{"M1":"0.0229916273727"}{"M2":"0.225398216008"} #-------------------- # Species # Species_Name: silver fir # Species_Code: ABSB #-------------------- # 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 1692 1.008 1693 1.051 1694 0.929 1695 0.928 1696 1.03 1697 1.107 1698 0.999 1699 1.091 1700 1.16 1701 1.19 1702 1.355 1703 1.318 1704 1.036 1705 1.116 1706 1.296 1707 0.99 1708 1.044 1709 1.042 1710 1.158 1711 1.116 1712 1.005 1713 0.775 1714 1.169 1715 0.982 1716 1.071 1717 0.884 1718 0.813 1719 0.739 1720 1.053 1721 0.96 1722 0.91 1723 0.818 1724 0.659 1725 0.715 1726 0.807 1727 0.653 1728 0.635 1729 0.626 1730 0.806 1731 0.802 1732 0.732 1733 0.731 1734 1.002 1735 0.811 1736 0.763 1737 0.768 1738 0.727 1739 0.774 1740 0.711 1741 0.668 1742 0.943 1743 0.84 1744 0.807 1745 0.703 1746 0.996 1747 1.193 1748 0.98 1749 0.782 1750 0.705 1751 0.744 1752 0.681 1753 0.697 1754 0.776 1755 1.012 1756 1.12 1757 1.015 1758 1.023 1759 0.979 1760 1.027 1761 0.947 1762 0.954 1763 0.876 1764 1.151 1765 1.245 1766 1.136 1767 1.013 1768 0.989 1769 0.863 1770 0.977 1771 1.102 1772 1.233 1773 1.23 1774 0.986 1775 1.016 1776 0.965 1777 1.314 1778 1.058 1779 0.949 1780 0.848 1781 1.032 1782 0.945 1783 1.093 1784 1.274 1785 1.393 1786 1.296 1787 0.957 1788 1.139 1789 1.19 1790 1.115 1791 1.074 1792 1.059 1793 1.028 1794 1.105 1795 0.964 1796 1.068 1797 1.061 1798 1.155 1799 1.085 1800 1.089 1801 1.029 1802 1.127 1803 1.049 1804 1.066 1805 1.245 1806 1.286 1807 1.199 1808 0.844 1809 0.837 1810 0.919 1811 0.869 1812 0.77 1813 0.881 1814 1.074 1815 1.189 1816 1.117 1817 0.959 1818 0.748 1819 0.744 1820 0.766 1821 0.823 1822 0.891 1823 0.721 1824 0.995 1825 0.792 1826 1.03 1827 1.01 1828 0.843 1829 1.069 1830 1.202 1831 1.117 1832 1.159 1833 1.374 1834 1.247 1835 1.222 1836 1.13 1837 1.182 1838 0.907 1839 1.323 1840 1.316 1841 1.017 1842 1.033 1843 0.87 1844 0.928 1845 0.686 1846 0.961 1847 0.811 1848 1.038 1849 0.629 1850 0.672 1851 0.62 1852 0.676 1853 0.838 1854 0.92 1855 0.948 1856 0.886 1857 0.953 1858 1.077 1859 0.878 1860 0.892 1861 0.747 1862 0.774 1863 0.684 1864 0.777 1865 1.026 1866 0.779 1867 0.912 1868 0.762 1869 0.677 1870 0.719 1871 1.011 1872 0.667 1873 0.672 1874 0.684 1875 0.67 1876 0.891 1877 1.16 1878 0.972 1879 1.132 1880 1.009 1881 1.238 1882 1.099 1883 1.231 1884 1.009 1885 1.005 1886 0.938 1887 0.781 1888 0.906 1889 0.952 1890 0.935 1891 1.157 1892 0.924 1893 1.199 1894 1.144 1895 0.843 1896 1.018 1897 1.013 1898 0.996 1899 1.099 1900 1.074 1901 0.708 1902 0.821 1903 0.978 1904 0.806 1905 0.781 1906 0.761 1907 0.944 1908 1.146 1909 1.126 1910 1.807 1911 1.879 1912 1.009 1913 0.878 1914 1.08 1915 0.679 1916 0.655 1917 0.754 1918 0.619 1919 0.945 1920 0.84 1921 0.835 1922 1.265 1923 1.02 1924 0.989 1925 1.082 1926 0.934 1927 0.668 1928 0.757 1929 0.783 1930 0.945 1931 0.861 1932 0.773 1933 0.871 1934 0.693 1935 0.75 1936 0.898 1937 0.772 1938 0.674 1939 0.763 1940 0.719 1941 0.606 1942 0.845 1943 0.884 1944 0.957 1945 0.889 1946 1.03 1947 1.146 1948 0.965 1949 0.904 1950 0.782 1951 0.716 1952 0.771 1953 1.058 1954 1.172 1955 0.988 1956 0.903 1957 0.895 1958 0.715 1959 0.524 1960 0.704 1961 0.776 1962 0.993 1963 0.827 1964 0.495 1965 0.718 1966 1.278 1967 0.877 1968 1.065 1969 1.088 1970 1.009 1971 0.864 1972 0.727 1973 0.829 1974 0.964 1975 0.946 1976 0.873 1977 0.884 1978 0.871 1979 1.152 1980 0.879 1981 1.204 1982 0.871 1983 0.936 1984 0.796 1985 1.146 1986 1.418 1987 1.304 1988 1.122 1989 0.853 1990 0.907 1991 0.782 1992 0.877 1993 1.116 1994 0.939 1995 0.805 1996 0.708