# europe_swit140w - Riederalp Vs Aletschwald - 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: europe_swit140w - Riederalp Vs Aletschwald - 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: Riederalp Vs Aletschwald # Location: # Country: Switzerland # Northernmost_Latitude: 46.4 # Southernmost_Latitude: 46.4 # Easternmost_Longitude: 8.02 # Westernmost_Longitude: 8.02 # Elevation: 2000 m #-------------------- # Data_Collection # Collection_Name: europe_swit140wB # Earliest_Year: 1866 # Most_Recent_Year: 1974 # Time_Unit: y_ad # Core_Length: # Notes: {"sensitivity":"temperature"}{"T1":"5.55217704925"}{"T2":"17.4811080943"}{"M1":"0.0228939038572"}{"M2":"0.399765161679"} #-------------------- # Species # Species_Name: European larch # Species_Code: LADE #-------------------- # 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 1866 0.839 1867 0.878 1868 1.073 1869 0.932 1870 0.978 1871 0.784 1872 0.673 1873 0.772 1874 1.168 1875 1.223 1876 1.074 1877 1.101 1878 1.043 1879 1.03 1880 1.081 1881 1.075 1882 1.093 1883 0.806 1884 1.061 1885 1.084 1886 0.762 1887 1.249 1888 0.958 1889 0.985 1890 0.837 1891 0.932 1892 1.296 1893 1.3 1894 1.099 1895 1.071 1896 1.103 1897 0.959 1898 0.775 1899 1.17 1900 1.225 1901 1.31 1902 0.998 1903 1.143 1904 1.326 1905 1.258 1906 1.13 1907 1.142 1908 1.273 1909 0.684 1910 0.865 1911 1.122 1912 1.09 1913 0.467 1914 0.473 1915 0.734 1916 0.747 1917 1.07 1918 0.988 1919 0.972 1920 1.157 1921 1.419 1922 1.57 1923 1.1 1924 1.43 1925 1.541 1926 0.824 1927 1.278 1928 1.29 1929 0.929 1930 0.988 1931 1.304 1932 1.009 1933 0.93 1934 1.216 1935 1.284 1936 0.969 1937 0.555 1938 0.462 1939 0.497 1940 0.523 1941 0.792 1942 0.954 1943 1.068 1944 1.194 1945 1.007 1946 0.522 1947 1.066 1948 0.891 1949 1.228 1950 1.449 1951 1.477 1952 1.494 1953 0.649 1954 0.891 1955 0.822 1956 0.628 1957 0.801 1958 1.201 1959 1.133 1960 0.982 1961 0.76 1962 1.195 1963 0.655 1964 0.489 1965 0.617 1966 0.771 1967 0.969 1968 0.808 1969 0.828 1970 1.027 1971 1.324 1972 1.132 1973 0.965 1974 0.838