# northamerica_usa_wa116 - Dodger Point Low - 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: northamerica_usa_wa116 - Dodger Point Low - 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: Dodger Point Low
#	Location:
#	Country: United States
#	Northernmost_Latitude: 47.83
#	Southernmost_Latitude: 47.83
#	Easternmost_Longitude: -123.52
#	Westernmost_Longitude: -123.52
#	Elevation: 1395 m
#--------------------
# Data_Collection
#	Collection_Name: northamerica_usa_wa116B
#	Earliest_Year: 1866
#	Most_Recent_Year: 1990
#	Time_Unit: y_ad
#	Core_Length:
#	Notes: {"sensitivity":"temperature"}{"T1":"5.72719721566"}{"T2":"18.2563109542"}{"M1":"0.0225822264506"}{"M2":"0.361616843988"}
#--------------------
# Species
#	Species_Name: subalpine fir
#	Species_Code: ABLA
#--------------------
# 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
1866	0.792
1867	0.881
1868	0.818
1869	0.857
1870	0.861
1871	0.847
1872	0.932
1873	1.037
1874	0.764
1875	0.989
1876	0.721
1877	1.104
1878	0.727
1879	0.747
1880	0.814
1881	0.709
1882	0.78
1883	0.896
1884	1.058
1885	1.021
1886	1.075
1887	0.968
1888	1.048
1889	1.128
1890	0.962
1891	1.042
1892	0.987
1893	0.73
1894	0.701
1895	0.887
1896	0.908
1897	0.967
1898	0.914
1899	0.777
1900	1.056
1901	0.965
1902	0.933
1903	0.905
1904	1.032
1905	1.015
1906	1.028
1907	1.113
1908	0.941
1909	0.648
1910	0.992
1911	0.875
1912	1.057
1913	1.044
1914	1.031
1915	1.216
1916	0.869
1917	1.07
1918	1.046
1919	0.792
1920	1.128
1921	0.69
1922	1.133
1923	1.045
1924	1.012
1925	1.009
1926	0.887
1927	0.819
1928	1.084
1929	1.094
1930	1.171
1931	1.21
1932	1.139
1933	1.208
1934	1.023
1935	1.244
1936	1.162
1937	1.146
1938	1.202
1939	1.202
1940	1.211
1941	1.181
1942	1.113
1943	0.845
1944	1.083
1945	1.132
1946	0.922
1947	1.135
1948	1.278
1949	1.225
1950	1.245
1951	1.074
1952	1.21
1953	1.065
1954	0.988
1955	1.36
1956	0.948
1957	0.889
1958	1.351
1959	0.835
1960	1.112
1961	0.918
1962	1.004
1963	0.975
1964	0.838
1965	1.18
1966	0.968
1967	1.102
1968	0.911
1969	0.821
1970	1.052
1971	0.912
1972	0.921
1973	0.929
1974	0.605
1975	0.975
1976	0.752
1977	1.148
1978	0.749
1979	0.868
1980	1.004
1981	1.033
1982	0.586
1983	0.597
1984	0.868
1985	0.933
1986	0.8
1987	0.88
1988	0.736
1989	0.702
1990	0.922