# asia_nepa039 - Banal-Salme - 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_nepa039 - Banal-Salme - 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: Banal-Salme # Location: # Country: Nepal # Northernmost_Latitude: 28.03 # Southernmost_Latitude: 28.03 # Easternmost_Longitude: 85.07 # Westernmost_Longitude: 85.07 # Elevation: 3115 m #-------------------- # Data_Collection # Collection_Name: asia_nepa039B # Earliest_Year: 1771 # Most_Recent_Year: 1996 # Time_Unit: y_ad # Core_Length: # Notes: {"sensitivity":"temperature"}{"T1":"6.20649928015"}{"T2":"17.4796996594"}{"M1":"0.0221355760328"}{"M2":"0.397088873365"} #-------------------- # Species # Species_Name: East Himalayan hemlock # Species_Code: TSDU #-------------------- # 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 1771 0.979 1772 0.856 1773 0.969 1774 0.899 1775 0.764 1776 0.737 1777 0.727 1778 0.557 1779 0.668 1780 0.528 1781 0.521 1782 0.757 1783 0.92 1784 1.125 1785 0.951 1786 1.059 1787 0.453 1788 0.754 1789 0.907 1790 1.064 1791 0.811 1792 1.168 1793 0.989 1794 1.137 1795 1.073 1796 1.039 1797 0.966 1798 1.071 1799 1.001 1800 0.84 1801 0.911 1802 1.331 1803 1.276 1804 1.139 1805 1.029 1806 1.217 1807 0.996 1808 0.962 1809 0.851 1810 1.168 1811 0.896 1812 0.739 1813 0.992 1814 0.702 1815 0.395 1816 0.84 1817 0.71 1818 0.841 1819 0.717 1820 0.718 1821 0.94 1822 0.84 1823 0.992 1824 1.044 1825 0.652 1826 0.998 1827 1.244 1828 0.797 1829 0.672 1830 1.229 1831 1.324 1832 1.298 1833 1.395 1834 0.748 1835 0.734 1836 0.714 1837 0.873 1838 0.486 1839 0.482 1840 0.916 1841 1.091 1842 0.977 1843 0.943 1844 1.057 1845 1.183 1846 0.96 1847 0.714 1848 1.064 1849 0.943 1850 0.94 1851 1.23 1852 1.306 1853 1.407 1854 0.785 1855 0.768 1856 1.098 1857 1.636 1858 1.057 1859 1.134 1860 1.33 1861 0.908 1862 1.04 1863 1.065 1864 0.842 1865 0.969 1866 0.51 1867 0.389 1868 0.699 1869 0.732 1870 0.578 1871 0.842 1872 1.166 1873 1.183 1874 0.609 1875 0.386 1876 0.998 1877 1.317 1878 1.622 1879 0.829 1880 0.882 1881 1.662 1882 1.27 1883 1.272 1884 1.266 1885 1.182 1886 0.964 1887 0.647 1888 0.712 1889 0.829 1890 0.214 1891 0.521 1892 0.67 1893 0.971 1894 1.782 1895 1.069 1896 0.645 1897 0.224 1898 0.397 1899 0.805 1900 1.361 1901 0.706 1902 0.851 1903 1.128 1904 0.902 1905 0.677 1906 0.735 1907 0.61 1908 1.127 1909 0.648 1910 0.398 1911 0.484 1912 0.735 1913 0.842 1914 1.054 1915 0.77 1916 0.502 1917 0.758 1918 1.444 1919 1.382 1920 0.912 1921 0.741 1922 0.922 1923 0.702 1924 1.159 1925 1.103 1926 1.193 1927 1.055 1928 0.961 1929 0.92 1930 1.077 1931 1.278 1932 0.798 1933 0.792 1934 1.128 1935 1.187 1936 1.316 1937 1.368 1938 0.864 1939 0.801 1940 1.155 1941 1.134 1942 1.234 1943 0.884 1944 0.899 1945 0.919 1946 0.811 1947 0.976 1948 1.049 1949 1.134 1950 1.335 1951 1.328 1952 1.142 1953 0.631 1954 0.817 1955 0.764 1956 0.815 1957 1.217 1958 0.897 1959 0.826 1960 1.064 1961 0.881 1962 0.873 1963 1.04 1964 1.125 1965 0.676 1966 0.74 1967 0.554 1968 0.427 1969 0.654 1970 0.483 1971 0.557 1972 1.187 1973 0.878 1974 0.602 1975 0.908 1976 1.266 1977 1.337 1978 0.985 1979 0.859 1980 1.299 1981 1.563 1982 1.917 1983 1.751 1984 1.193 1985 1.413 1986 1.313 1987 1.271 1988 1.189 1989 1.197 1990 1.319 1991 0.899 1992 0.985 1993 1.111 1994 1.155 1995 0.748 1996 1.144