# asia_indi010 - Kanasar - 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_indi010 - Kanasar - 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: Kanasar # Location: # Country: India # Northernmost_Latitude: 30.75 # Southernmost_Latitude: 30.75 # Easternmost_Longitude: 77.8 # Westernmost_Longitude: 77.8 # Elevation: 2200 m #-------------------- # Data_Collection # Collection_Name: asia_indi010B # Earliest_Year: 1788 # Most_Recent_Year: 1988 # Time_Unit: y_ad # Core_Length: # Notes: {"sensitivity":"temperature"}{"T1":"3.705017834"}{"T2":"18.1377272203"}{"M1":"0.0229430622731"}{"M2":"0.469432305476"} #-------------------- # Species # Species_Name: deodar cedar # Species_Code: CDDE #-------------------- # 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 1788 0.797 1789 0.638 1790 0.833 1791 0.977 1792 1.029 1793 1.089 1794 1.034 1795 0.968 1796 0.715 1797 1.123 1798 0.973 1799 0.886 1800 0.669 1801 1.157 1802 0.77 1803 0.687 1804 1.297 1805 1.546 1806 1.07 1807 1.475 1808 0.99 1809 1.428 1810 1.18 1811 1.024 1812 0.836 1813 1.121 1814 1.078 1815 0.639 1816 1.432 1817 1.18 1818 0.778 1819 0.987 1820 0.911 1821 0.729 1822 0.721 1823 0.69 1824 0.943 1825 0.536 1826 0.696 1827 0.862 1828 0.652 1829 0.895 1830 0.556 1831 0.786 1832 0.833 1833 0.764 1834 0.93 1835 0.761 1836 0.857 1837 0.758 1838 0.768 1839 0.62 1840 1.086 1841 1.001 1842 0.887 1843 1.341 1844 0.91 1845 1.103 1846 1.182 1847 1.371 1848 1.165 1849 0.761 1850 1.043 1851 1.021 1852 0.964 1853 1.22 1854 1.2 1855 1.136 1856 1.002 1857 0.935 1858 0.862 1859 1.01 1860 0.845 1861 0.926 1862 1.001 1863 1.029 1864 1.149 1865 1.179 1866 1.076 1867 1.143 1868 1.026 1869 0.842 1870 0.965 1871 1.034 1872 0.771 1873 0.662 1874 0.968 1875 0.793 1876 1.073 1877 1.197 1878 1.14 1879 0.884 1880 1.06 1881 1.053 1882 1.014 1883 0.874 1884 0.751 1885 1.159 1886 1.044 1887 0.867 1888 0.844 1889 0.926 1890 0.565 1891 0.881 1892 0.432 1893 1.123 1894 0.887 1895 0.959 1896 0.678 1897 1.058 1898 0.632 1899 0.673 1900 1.051 1901 0.857 1902 0.725 1903 0.417 1904 0.7 1905 0.771 1906 0.826 1907 0.809 1908 0.441 1909 0.942 1910 1.057 1911 0.823 1912 0.94 1913 1.177 1914 1.401 1915 0.937 1916 0.688 1917 1.057 1918 0.608 1919 0.878 1920 0.676 1921 0.246 1922 0.648 1923 0.691 1924 0.914 1925 1.044 1926 1.252 1927 0.882 1928 1.541 1929 1.34 1930 1.42 1931 1.358 1932 0.941 1933 1.423 1934 1.18 1935 1.122 1936 1.342 1937 1.431 1938 1.249 1939 1.512 1940 1.828 1941 0.84 1942 1.192 1943 1.114 1944 1.163 1945 1.046 1946 1.084 1947 0.694 1948 0.882 1949 1.076 1950 0.861 1951 0.998 1952 1.034 1953 0.718 1954 0.841 1955 0.792 1956 0.872 1957 1.056 1958 0.868 1959 0.951 1960 0.721 1961 0.784 1962 0.685 1963 0.764 1964 1.038 1965 1.111 1966 0.613 1967 0.82 1968 0.893 1969 0.62 1970 0.718 1971 0.956 1972 0.897 1973 0.752 1974 0.697 1975 0.995 1976 1.035 1977 1.011 1978 0.75 1979 0.856 1980 0.387 1981 1.184 1982 1.507 1983 1.43 1984 0.699 1985 0.463 1986 1.229 1987 1.493 1988 1.115