# europe_germ060 - Falkenfels - Breitenmoser Tree Ring Chronology Data
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#		World Data Center for Paleoclimatology, Boulder
#				and
#		NOAA Paleoclimatology Program
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# 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.
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# Online_Resource:
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# Original_Source_URL:
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# Description/Documentation lines begin with #
# Data lines have no #
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# Archive: Tree Rings
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# Contribution_Date
#	Date: 2016-01-07
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# Title
#	Study_Name: europe_germ060 - Falkenfels - 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.
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# Funding_Agency
#	Funding_Agency_Name: Swiss National Science Foundation
#	Grant:
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# Site_Information
#	Site_Name: Falkenfels
#	Location:
#	Country: Germany
#	Northernmost_Latitude: 48.98
#	Southernmost_Latitude: 48.98
#	Easternmost_Longitude: 12.57
#	Westernmost_Longitude: 12.57
#	Elevation: 420 m
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# Data_Collection
#	Collection_Name: europe_germ060B
#	Earliest_Year: 1864
#	Most_Recent_Year: 1997
#	Time_Unit: y_ad
#	Core_Length:
#	Notes: {"sensitivity":"moisture"}{"T1":"4.08174962342"}{"T2":"16.096591842"}{"M1":"0.0226130927516"}{"M2":"0.510696862189"}
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# Species
#	Species_Name: silver fir
#	Species_Code: ABAL
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# Chronology:
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# Variables
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# 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)
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##age	age, , ,years AD, , , , ,N
##trsgi	tree ring standardized growth index, tree ring, ,percent relative to mean growth, , Tree Rings, , ,N
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# Data:
# Data lines follow (have no #)
# Data line format - tab-delimited text, variable short name as header
# Missing Values: nan
#
age	trsgi
1864	1.044
1865	0.924
1866	1.212
1867	1.226
1868	0.913
1869	1.096
1870	0.993
1871	1.171
1872	0.903
1873	1.266
1874	0.967
1875	0.903
1876	0.965
1877	0.946
1878	0.934
1879	1.137
1880	0.745
1881	1.134
1882	1.191
1883	1.138
1884	1.093
1885	0.8
1886	0.666
1887	0.808
1888	0.793
1889	0.842
1890	1.014
1891	0.898
1892	0.793
1893	0.613
1894	0.864
1895	1.131
1896	1.041
1897	1.214
1898	1.068
1899	1.018
1900	0.868
1901	0.938
1902	1.027
1903	0.956
1904	1.0
1905	0.752
1906	1.004
1907	0.767
1908	0.912
1909	0.819
1910	0.905
1911	0.858
1912	0.749
1913	0.966
1914	1.119
1915	0.756
1916	0.9
1917	1.014
1918	0.847
1919	1.14
1920	0.827
1921	0.648
1922	0.847
1923	0.955
1924	0.774
1925	0.955
1926	1.324
1927	1.171
1928	1.386
1929	0.647
1930	0.725
1931	1.049
1932	1.445
1933	1.471
1934	1.162
1935	1.251
1936	1.02
1937	1.23
1938	0.923
1939	1.087
1940	0.515
1941	0.942
1942	0.735
1943	0.794
1944	0.829
1945	0.801
1946	1.002
1947	1.296
1948	1.02
1949	1.022
1950	0.849
1951	1.063
1952	0.882
1953	0.884
1954	1.036
1955	1.412
1956	0.84
1957	1.391
1958	1.065
1959	1.241
1960	0.951
1961	1.373
1962	0.958
1963	1.129
1964	1.015
1965	0.958
1966	0.796
1967	0.824
1968	0.668
1969	0.896
1970	0.711
1971	0.81
1972	0.668
1973	0.757
1974	0.266
1975	0.484
1976	0.269
1977	0.166
1978	0.139
1979	0.227
1980	0.387
1981	0.463
1982	0.507
1983	0.913
1984	0.943
1985	0.705
1986	1.047
1987	0.984
1988	1.301
1989	1.059
1990	1.224
1991	1.233
1992	1.298
1993	1.062
1994	1.44
1995	1.397
1996	1.392
1997	2.029