# europe_spai006 - El Quintar - 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_spai006 - El Quintar - 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: El Quintar # Location: # Country: Spain # Northernmost_Latitude: 42.03 # Southernmost_Latitude: 42.03 # Easternmost_Longitude: -2.7 # Westernmost_Longitude: -2.7 # Elevation: 1900 m #-------------------- # Data_Collection # Collection_Name: europe_spai006B # Earliest_Year: 1862 # Most_Recent_Year: 1977 # Time_Unit: y_ad # Core_Length: # Notes: {"sensitivity":"temperature"}{"T1":"4.27740880742"}{"T2":"18.9066613937"}{"M1":"0.0221988864286"}{"M2":"0.356622231355"} #-------------------- # Species # Species_Name: Scots pine # Species_Code: PISY #-------------------- # 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 1862 1.066 1863 1.133 1864 1.505 1865 1.383 1866 1.406 1867 1.122 1868 0.971 1869 1.087 1870 0.984 1871 1.246 1872 0.848 1873 0.699 1874 0.684 1875 0.586 1876 0.496 1877 0.9 1878 1.028 1879 0.881 1880 1.003 1881 1.01 1882 0.967 1883 1.011 1884 0.871 1885 0.807 1886 0.512 1887 0.616 1888 0.946 1889 0.908 1890 0.954 1891 1.033 1892 1.418 1893 1.657 1894 1.267 1895 1.372 1896 0.886 1897 0.354 1898 0.382 1899 0.671 1900 0.617 1901 0.816 1902 0.908 1903 1.237 1904 1.522 1905 1.398 1906 1.289 1907 1.124 1908 0.973 1909 0.905 1910 0.936 1911 1.221 1912 1.065 1913 1.216 1914 1.175 1915 0.88 1916 0.98 1917 0.95 1918 0.918 1919 0.802 1920 0.812 1921 0.833 1922 0.832 1923 1.06 1924 0.954 1925 0.946 1926 0.962 1927 1.045 1928 0.981 1929 1.123 1930 1.168 1931 1.206 1932 1.232 1933 1.401 1934 0.893 1935 0.953 1936 0.944 1937 1.057 1938 0.898 1939 0.814 1940 0.727 1941 0.511 1942 0.675 1943 0.99 1944 0.768 1945 0.824 1946 0.816 1947 1.185 1948 1.269 1949 1.045 1950 1.058 1951 1.238 1952 1.29 1953 1.223 1954 0.875 1955 1.173 1956 0.996 1957 1.009 1958 1.377 1959 1.235 1960 1.139 1961 1.166 1962 0.731 1963 0.51 1964 0.895 1965 0.86 1966 0.819 1967 0.734 1968 0.789 1969 0.935 1970 1.179 1971 1.006 1972 0.894 1973 1.264 1974 0.989 1975 0.848 1976 1.142 1977 0.89