# europe_swit143w - Roggwil BE Fi Vergl.Prob - 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_swit143w - Roggwil BE Fi Vergl.Prob - 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: Roggwil BE Fi Vergl.Prob # Location: # Country: Switzerland # Northernmost_Latitude: 47.25 # Southernmost_Latitude: 47.25 # Easternmost_Longitude: 7.83 # Westernmost_Longitude: 7.83 # Elevation: 535 m #-------------------- # Data_Collection # Collection_Name: europe_swit143wB # Earliest_Year: 1870 # Most_Recent_Year: 1977 # Time_Unit: y_ad # Core_Length: # Notes: {"sensitivity":"moisture"}{"T1":"3.47576076962"}{"T2":"12.487376178"}{"M1":"0.0235424851648"}{"M2":"0.639650040917"} #-------------------- # Species # Species_Name: Norway spruce # Species_Code: PCAB #-------------------- # 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 1870 1.018 1871 1.082 1872 1.295 1873 1.279 1874 1.159 1875 1.289 1876 0.82 1877 1.045 1878 1.243 1879 1.001 1880 0.886 1881 0.948 1882 0.991 1883 0.972 1884 0.991 1885 0.661 1886 0.753 1887 0.58 1888 0.972 1889 1.057 1890 1.226 1891 1.107 1892 0.897 1893 0.597 1894 0.762 1895 0.786 1896 0.873 1897 0.805 1898 0.983 1899 0.862 1900 0.804 1901 0.881 1902 1.016 1903 1.294 1904 1.049 1905 1.03 1906 0.949 1907 0.929 1908 0.844 1909 0.962 1910 1.426 1911 0.942 1912 1.269 1913 1.296 1914 1.329 1915 1.428 1916 1.638 1917 1.286 1918 1.162 1919 1.011 1920 0.806 1921 0.568 1922 0.567 1923 0.799 1924 0.909 1925 1.206 1926 1.461 1927 1.482 1928 1.06 1929 0.652 1930 1.091 1931 1.109 1932 1.229 1933 0.958 1934 0.807 1935 0.768 1936 0.738 1937 0.787 1938 0.718 1939 1.008 1940 1.057 1941 0.937 1942 0.834 1943 1.1 1944 0.682 1945 0.597 1946 0.517 1947 0.389 1948 0.286 1949 0.362 1950 0.536 1951 0.448 1952 0.706 1953 0.925 1954 0.991 1955 1.4 1956 1.363 1957 1.465 1958 1.431 1959 1.104 1960 1.038 1961 1.131 1962 0.841 1963 1.183 1964 1.132 1965 1.016 1966 1.169 1967 1.042 1968 1.111 1969 1.267 1970 1.11 1971 0.954 1972 1.246 1973 0.903 1974 0.698 1975 0.935 1976 0.553 1977 0.696