# northamerica_usa_co546 - Onahu Creek - 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_co546 - Onahu Creek - 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: Onahu Creek # Location: # Country: United States # Northernmost_Latitude: 40.33 # Southernmost_Latitude: 40.33 # Easternmost_Longitude: -105.83 # Westernmost_Longitude: -105.83 # Elevation: 2804 m #-------------------- # Data_Collection # Collection_Name: northamerica_usa_co546B # Earliest_Year: 1795 # Most_Recent_Year: 1987 # Time_Unit: y_ad # Core_Length: # Notes: {"sensitivity":"moisture"}{"T1":"4.28974385607"}{"T2":"14.3910384178"}{"M1":"0.02298318826"}{"M2":"0.511695214371"} #-------------------- # Species # Species_Name: lodgepole pine # Species_Code: PICO #-------------------- # 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 1795 1.092 1796 1.085 1797 0.972 1798 1.1 1799 1.04 1800 1.118 1801 0.936 1802 1.123 1803 1.157 1804 1.138 1805 1.095 1806 0.968 1807 0.942 1808 1.001 1809 0.949 1810 0.969 1811 0.944 1812 0.927 1813 0.957 1814 0.989 1815 1.024 1816 1.127 1817 1.043 1818 0.998 1819 0.94 1820 0.932 1821 0.962 1822 1.113 1823 0.998 1824 0.808 1825 0.994 1826 1.032 1827 1.047 1828 1.058 1829 0.882 1830 0.996 1831 1.034 1832 0.976 1833 0.954 1834 0.825 1835 0.996 1836 0.96 1837 0.942 1838 0.891 1839 0.868 1840 0.941 1841 0.965 1842 1.011 1843 1.075 1844 0.932 1845 0.805 1846 0.895 1847 0.953 1848 0.909 1849 1.035 1850 1.001 1851 0.804 1852 0.968 1853 0.943 1854 0.93 1855 0.935 1856 0.928 1857 1.038 1858 1.095 1859 1.049 1860 1.126 1861 1.068 1862 1.141 1863 1.036 1864 0.873 1865 0.69 1866 0.973 1867 0.894 1868 0.861 1869 0.888 1870 0.892 1871 0.677 1872 0.703 1873 0.679 1874 0.83 1875 1.015 1876 1.018 1877 0.963 1878 0.906 1879 0.975 1880 0.882 1881 0.868 1882 0.933 1883 0.853 1884 0.974 1885 1.08 1886 1.06 1887 0.948 1888 0.951 1889 0.921 1890 0.772 1891 0.917 1892 0.929 1893 0.81 1894 1.006 1895 1.126 1896 0.942 1897 1.07 1898 0.962 1899 0.952 1900 1.043 1901 1.12 1902 1.011 1903 1.066 1904 1.061 1905 1.14 1906 0.987 1907 1.066 1908 1.093 1909 1.015 1910 1.022 1911 1.229 1912 1.255 1913 1.159 1914 1.238 1915 1.187 1916 1.245 1917 1.239 1918 1.165 1919 1.015 1920 0.968 1921 1.101 1922 1.047 1923 1.148 1924 1.131 1925 1.133 1926 1.111 1927 1.122 1928 1.202 1929 1.089 1930 0.999 1931 1.044 1932 1.041 1933 0.92 1934 0.82 1935 0.857 1936 0.799 1937 0.96 1938 0.88 1939 0.954 1940 1.028 1941 1.106 1942 0.955 1943 1.138 1944 1.044 1945 1.232 1946 1.134 1947 1.241 1948 0.966 1949 1.156 1950 0.956 1951 1.159 1952 1.159 1953 1.203 1954 1.131 1955 1.135 1956 1.041 1957 1.108 1958 0.924 1959 0.813 1960 0.8 1961 0.84 1962 0.84 1963 0.951 1964 0.862 1965 0.881 1966 0.949 1967 0.986 1968 0.853 1969 0.742 1970 0.818 1971 0.791 1972 0.817 1973 0.897 1974 0.987 1975 1.05 1976 0.847 1977 0.85 1978 1.038 1979 0.909 1980 0.867 1981 0.957 1982 0.989 1983 0.969 1984 1.191 1985 1.163 1986 1.37 1987 1.21