# northamerica_canada_cana184 - Munsen Park - 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_cana184 - Munsen Park - 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: Munsen Park
#	Location:
#	Country: Canada
#	Northernmost_Latitude: 49.87
#	Southernmost_Latitude: 49.87
#	Easternmost_Longitude: -97.17
#	Westernmost_Longitude: -97.17
#	Elevation: 230 m
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# Data_Collection
#	Collection_Name: northamerica_canada_cana184B
#	Earliest_Year: 1880
#	Most_Recent_Year: 1999
#	Time_Unit: y_ad
#	Core_Length:
#	Notes: {"sensitivity":"moisture"}{"T1":"4.26492865684"}{"T2":"14.9430967991"}{"M1":"0.0225802798736"}{"M2":"0.535043474217"}
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# Species
#	Species_Name: burr oak
#	Species_Code: QUMA
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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
1880	1.027
1881	1.001
1882	1.102
1883	0.981
1884	1.075
1885	1.297
1886	0.835
1887	0.917
1888	0.947
1889	0.593
1890	1.04
1891	1.033
1892	1.473
1893	1.539
1894	1.384
1895	1.042
1896	1.5
1897	1.179
1898	1.402
1899	1.431
1900	0.895
1901	1.512
1902	1.329
1903	0.813
1904	1.203
1905	1.361
1906	1.254
1907	0.877
1908	1.006
1909	0.671
1910	0.8
1911	0.922
1912	1.148
1913	1.058
1914	0.924
1915	0.72
1916	1.204
1917	0.67
1918	0.867
1919	0.923
1920	0.86
1921	1.023
1922	0.837
1923	0.948
1924	0.772
1925	0.95
1926	0.905
1927	0.946
1928	0.751
1929	0.794
1930	0.853
1931	0.742
1932	0.674
1933	0.864
1934	0.867
1935	1.108
1936	0.796
1937	0.847
1938	0.761
1939	0.922
1940	0.983
1941	1.133
1942	1.114
1943	0.921
1944	0.849
1945	0.931
1946	0.738
1947	0.879
1948	0.834
1949	0.977
1950	1.039
1951	0.83
1952	0.97
1953	1.352
1954	1.144
1955	1.195
1956	0.994
1957	1.389
1958	0.983
1959	1.035
1960	0.856
1961	0.792
1962	1.241
1963	0.966
1964	0.646
1965	0.905
1966	0.874
1967	0.835
1968	1.262
1969	1.084
1970	1.007
1971	0.904
1972	0.669
1973	1.159
1974	0.918
1975	1.206
1976	0.979
1977	1.024
1978	1.108
1979	0.833
1980	0.574
1981	1.064
1982	1.011
1983	1.072
1984	0.585
1985	0.631
1986	1.004
1987	0.952
1988	0.85
1989	1.144
1990	1.049
1991	0.761
1992	0.865
1993	1.469
1994	1.256
1995	1.106
1996	1.096
1997	1.149
1998	1.389
1999	1.444