# northamerica_canada_cana200 - Fleming Island, Cree Lake - 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.
#
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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
#--------------------
# Contribution_Date
#	Date: 2016-01-07
#--------------------
# Title
#	Study_Name: northamerica_canada_cana200 - Fleming Island, Cree Lake - 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:
#--------------------
# Site_Information
#	Site_Name: Fleming Island, Cree Lake
#	Location:
#	Country: Canada
#	Northernmost_Latitude: 57.55
#	Southernmost_Latitude: 57.55
#	Easternmost_Longitude: -106.88
#	Westernmost_Longitude: -106.88
#	Elevation: 510 m
#--------------------
# Data_Collection
#	Collection_Name: northamerica_canada_cana200B
#	Earliest_Year: 1878
#	Most_Recent_Year: 2002
#	Time_Unit: y_ad
#	Core_Length:
#	Notes: {"sensitivity":"moisture"}{"T1":"3.39740790747"}{"T2":"15.6861712929"}{"M1":"0.0229213232442"}{"M2":"0.516190763309"}
#--------------------
# Species
#	Species_Name: jack pine
#	Species_Code: PIBN
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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)
#
##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
1878	1.19
1879	1.239
1880	1.624
1881	1.232
1882	0.94
1883	1.186
1884	0.977
1885	0.79
1886	0.709
1887	0.995
1888	0.829
1889	1.081
1890	0.979
1891	1.18
1892	1.022
1893	1.026
1894	1.171
1895	1.194
1896	1.055
1897	0.993
1898	1.005
1899	0.757
1900	0.904
1901	1.039
1902	1.024
1903	1.132
1904	1.132
1905	0.936
1906	0.945
1907	1.034
1908	1.175
1909	1.088
1910	1.202
1911	1.338
1912	0.997
1913	0.896
1914	1.109
1915	1.109
1916	1.008
1917	0.963
1918	0.946
1919	1.318
1920	1.031
1921	1.181
1922	1.531
1923	1.072
1924	0.964
1925	1.051
1926	1.063
1927	0.86
1928	0.685
1929	0.683
1930	0.861
1931	1.111
1932	1.109
1933	0.927
1934	0.751
1935	0.842
1936	1.098
1937	1.066
1938	1.115
1939	0.992
1940	0.904
1941	0.997
1942	0.568
1943	0.717
1944	0.763
1945	0.816
1946	0.477
1947	0.746
1948	0.797
1949	0.93
1950	0.845
1951	0.81
1952	0.441
1953	0.781
1954	0.819
1955	0.742
1956	1.071
1957	1.263
1958	1.093
1959	0.848
1960	0.964
1961	0.881
1962	0.921
1963	1.237
1964	1.458
1965	1.587
1966	1.239
1967	1.066
1968	0.929
1969	1.109
1970	0.911
1971	0.921
1972	0.92
1973	0.549
1974	0.819
1975	1.019
1976	1.297
1977	1.272
1978	1.005
1979	1.082
1980	0.99
1981	0.869
1982	0.755
1983	0.897
1984	1.097
1985	1.165
1986	1.256
1987	1.363
1988	0.986
1989	1.126
1990	0.975
1991	0.979
1992	1.102
1993	0.803
1994	0.769
1995	0.58
1996	0.69
1997	0.864
1998	0.952
1999	0.862
2000	0.89
2001	0.827
2002	0.737