# southamerica_arge057 - Rio Blanco Jujuy - 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
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# Contribution_Date
#	Date: 2016-01-07
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# Title
#	Study_Name: southamerica_arge057 - Rio Blanco Jujuy - 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: Rio Blanco Jujuy
#	Location:
#	Country: Argentina
#	Northernmost_Latitude: -24.92
#	Southernmost_Latitude: -24.92
#	Easternmost_Longitude: -65.42
#	Westernmost_Longitude: -65.42
#	Elevation: 1900 m
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# Data_Collection
#	Collection_Name: southamerica_arge057B
#	Earliest_Year: 1877
#	Most_Recent_Year: 1981
#	Time_Unit: y_ad
#	Core_Length:
#	Notes: {"sensitivity":"temperature"}{"T1":"4.91052724311"}{"T2":"13.5819879244"}{"M1":"0.0223264877388"}{"M2":"0.290359655534"}
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# Species
#	Species_Name: cedro salteno
#	Species_Code: CEAN
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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
1877	0.902
1878	0.792
1879	1.261
1880	1.41
1881	0.895
1882	0.749
1883	1.125
1884	0.983
1885	0.879
1886	1.091
1887	1.008
1888	1.145
1889	1.089
1890	0.921
1891	1.224
1892	0.997
1893	0.754
1894	1.208
1895	1.307
1896	1.381
1897	0.99
1898	1.205
1899	0.94
1900	0.719
1901	1.348
1902	1.645
1903	1.239
1904	0.681
1905	0.776
1906	0.873
1907	0.844
1908	0.799
1909	1.092
1910	0.823
1911	1.108
1912	1.197
1913	0.743
1914	1.275
1915	1.034
1916	1.056
1917	1.138
1918	0.732
1919	0.499
1920	0.875
1921	0.442
1922	0.389
1923	0.343
1924	0.463
1925	0.41
1926	0.635
1927	1.181
1928	0.951
1929	2.021
1930	0.933
1931	1.678
1932	0.784
1933	1.174
1934	0.715
1935	1.109
1936	1.462
1937	1.272
1938	1.778
1939	1.971
1940	1.057
1941	0.632
1942	0.533
1943	0.274
1944	0.262
1945	0.404
1946	0.733
1947	0.723
1948	1.184
1949	0.959
1950	0.667
1951	1.044
1952	1.32
1953	1.523
1954	1.079
1955	0.625
1956	0.793
1957	1.097
1958	1.24
1959	1.068
1960	1.334
1961	0.634
1962	0.514
1963	0.986
1964	0.964
1965	0.981
1966	1.074
1967	0.881
1968	0.614
1969	0.804
1970	0.72
1971	0.954
1972	1.343
1973	1.067
1974	1.129
1975	1.341
1976	1.017
1977	0.664
1978	1.235
1979	0.617
1980	1.465
1981	1.075