# asia_nepa032 - Mumbuk - 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_nepa032 - Mumbuk - 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: Mumbuk # Location: # Country: Nepal # Northernmost_Latitude: 27.4 # Southernmost_Latitude: 27.4 # Easternmost_Longitude: 87.12 # Westernmost_Longitude: 87.12 # Elevation: 3200 m #-------------------- # Data_Collection # Collection_Name: asia_nepa032B # Earliest_Year: 1751 # Most_Recent_Year: 1996 # Time_Unit: y_ad # Core_Length: # Notes: {"sensitivity":"temperature"}{"T1":"5.33323185314"}{"T2":"21.6637582179"}{"M1":"0.0223743064154"}{"M2":"0.261826605424"} #-------------------- # 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 1751 0.66 1752 0.611 1753 0.555 1754 0.554 1755 0.523 1756 0.839 1757 0.696 1758 0.758 1759 0.704 1760 0.668 1761 0.57 1762 0.603 1763 0.719 1764 0.531 1765 0.68 1766 0.504 1767 0.443 1768 0.484 1769 0.464 1770 0.61 1771 0.818 1772 0.644 1773 0.76 1774 0.899 1775 1.036 1776 0.715 1777 0.637 1778 0.756 1779 1.061 1780 1.022 1781 1.387 1782 1.335 1783 1.7 1784 1.327 1785 1.221 1786 1.532 1787 1.589 1788 1.774 1789 1.505 1790 1.042 1791 0.773 1792 0.826 1793 0.729 1794 1.212 1795 1.085 1796 1.511 1797 1.249 1798 1.299 1799 1.12 1800 1.444 1801 1.103 1802 1.518 1803 1.512 1804 1.457 1805 1.28 1806 1.091 1807 1.067 1808 0.889 1809 0.728 1810 0.833 1811 0.852 1812 0.838 1813 0.551 1814 0.605 1815 0.562 1816 0.809 1817 0.537 1818 0.53 1819 0.454 1820 0.783 1821 1.085 1822 1.22 1823 1.177 1824 1.482 1825 1.268 1826 1.159 1827 1.156 1828 1.094 1829 1.209 1830 1.388 1831 1.337 1832 1.139 1833 1.364 1834 1.061 1835 1.437 1836 1.488 1837 1.501 1838 1.444 1839 0.892 1840 0.644 1841 0.721 1842 0.929 1843 0.959 1844 1.329 1845 1.38 1846 1.41 1847 1.103 1848 1.044 1849 0.741 1850 0.734 1851 0.57 1852 0.496 1853 0.684 1854 0.678 1855 0.843 1856 0.956 1857 1.151 1858 1.089 1859 0.939 1860 0.993 1861 0.832 1862 0.916 1863 1.135 1864 0.807 1865 1.149 1866 0.928 1867 0.778 1868 0.675 1869 0.827 1870 0.632 1871 1.196 1872 0.77 1873 0.495 1874 0.637 1875 0.826 1876 0.874 1877 0.852 1878 0.872 1879 0.806 1880 0.649 1881 0.83 1882 0.828 1883 0.919 1884 0.852 1885 0.876 1886 1.006 1887 0.614 1888 0.87 1889 0.74 1890 0.684 1891 0.995 1892 0.781 1893 0.712 1894 1.012 1895 0.844 1896 1.033 1897 0.834 1898 0.891 1899 1.219 1900 1.455 1901 1.187 1902 1.067 1903 1.288 1904 1.344 1905 0.75 1906 0.442 1907 0.589 1908 1.176 1909 1.025 1910 1.144 1911 1.717 1912 0.988 1913 0.948 1914 1.209 1915 0.762 1916 0.639 1917 0.883 1918 0.696 1919 0.639 1920 0.64 1921 0.71 1922 0.997 1923 1.093 1924 1.427 1925 1.127 1926 1.069 1927 0.992 1928 1.36 1929 0.987 1930 1.394 1931 1.244 1932 0.914 1933 1.281 1934 1.369 1935 1.225 1936 1.341 1937 1.009 1938 0.923 1939 0.943 1940 1.174 1941 1.018 1942 0.961 1943 1.342 1944 1.296 1945 1.119 1946 0.965 1947 1.093 1948 0.723 1949 0.828 1950 0.93 1951 1.141 1952 0.973 1953 0.773 1954 0.931 1955 0.882 1956 1.036 1957 0.992 1958 0.987 1959 0.514 1960 0.461 1961 0.641 1962 0.431 1963 0.823 1964 0.727 1965 0.681 1966 0.719 1967 0.513 1968 0.525 1969 0.765 1970 0.678 1971 0.84 1972 1.109 1973 1.069 1974 1.179 1975 0.992 1976 0.91 1977 1.154 1978 0.426 1979 0.379 1980 0.367 1981 0.717 1982 0.535 1983 0.509 1984 0.669 1985 0.8 1986 1.071 1987 1.1 1988 1.009 1989 0.746 1990 0.729 1991 0.756 1992 0.67 1993 1.035 1994 1.034 1995 0.918 1996 1.107