# northamerica_canada_cana162 - Adams 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:
#
# 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_cana162 - Adams 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: Adams Lake
#	Location:
#	Country: Canada
#	Northernmost_Latitude: 51.03
#	Southernmost_Latitude: 51.03
#	Easternmost_Longitude: -119.05
#	Westernmost_Longitude: -119.05
#	Elevation: 1900 m
#--------------------
# Data_Collection
#	Collection_Name: northamerica_canada_cana162B
#	Earliest_Year: 1730
#	Most_Recent_Year: 1996
#	Time_Unit: y_ad
#	Core_Length:
#	Notes: {"sensitivity":"temperature"}{"T1":"4.57283901976"}{"T2":"18.9866208295"}{"M1":"0.0222759715821"}{"M2":"0.33472459856"}
#--------------------
# Species
#	Species_Name: subalpine fir
#	Species_Code: ABLA
#--------------------
# Chronology:
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# 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
1730	0.763
1731	0.684
1732	0.716
1733	0.698
1734	0.807
1735	0.746
1736	0.931
1737	0.785
1738	0.85
1739	0.995
1740	0.943
1741	0.903
1742	0.799
1743	0.846
1744	0.861
1745	0.846
1746	0.623
1747	0.944
1748	0.891
1749	0.941
1750	0.897
1751	0.86
1752	0.621
1753	0.785
1754	0.792
1755	0.778
1756	0.904
1757	0.925
1758	0.856
1759	0.836
1760	0.927
1761	0.858
1762	0.846
1763	1.006
1764	1.084
1765	0.874
1766	0.984
1767	1.091
1768	1.108
1769	1.149
1770	1.019
1771	0.887
1772	0.945
1773	1.164
1774	1.204
1775	0.887
1776	1.274
1777	1.33
1778	1.062
1779	0.893
1780	0.999
1781	0.851
1782	0.714
1783	0.998
1784	0.691
1785	0.645
1786	0.771
1787	0.716
1788	0.703
1789	0.72
1790	0.8
1791	0.841
1792	0.943
1793	0.943
1794	1.082
1795	0.989
1796	1.138
1797	0.922
1798	1.038
1799	0.736
1800	1.049
1801	0.722
1802	0.776
1803	1.054
1804	0.978
1805	0.931
1806	0.783
1807	0.943
1808	1.01
1809	0.985
1810	0.672
1811	0.869
1812	0.732
1813	0.764
1814	0.599
1815	0.644
1816	0.755
1817	0.903
1818	0.795
1819	0.592
1820	0.761
1821	0.838
1822	0.759
1823	0.862
1824	0.736
1825	0.911
1826	0.797
1827	0.961
1828	1.075
1829	0.924
1830	0.945
1831	1.118
1832	0.741
1833	0.927
1834	1.113
1835	0.952
1836	0.666
1837	0.897
1838	0.574
1839	1.2
1840	0.957
1841	0.947
1842	1.004
1843	1.047
1844	0.815
1845	0.823
1846	0.899
1847	0.899
1848	1.173
1849	0.851
1850	0.885
1851	1.2
1852	1.161
1853	1.048
1854	0.895
1855	1.056
1856	0.91
1857	0.87
1858	0.968
1859	1.005
1860	0.922
1861	0.862
1862	0.905
1863	1.18
1864	0.881
1865	1.038
1866	0.93
1867	0.708
1868	0.902
1869	1.037
1870	0.837
1871	0.907
1872	0.969
1873	0.88
1874	1.015
1875	1.146
1876	0.872
1877	1.116
1878	1.084
1879	0.935
1880	0.763
1881	0.674
1882	0.995
1883	0.946
1884	0.865
1885	1.047
1886	1.072
1887	0.942
1888	0.965
1889	1.132
1890	1.174
1891	1.183
1892	0.934
1893	1.047
1894	1.011
1895	0.944
1896	1.078
1897	1.156
1898	1.183
1899	0.895
1900	1.023
1901	1.146
1902	1.109
1903	1.278
1904	1.269
1905	1.32
1906	1.163
1907	1.096
1908	1.39
1909	1.11
1910	1.139
1911	1.113
1912	1.254
1913	1.413
1914	1.264
1915	1.207
1916	0.939
1917	1.148
1918	1.264
1919	1.202
1920	1.251
1921	1.06
1922	1.39
1923	1.185
1924	1.121
1925	1.299
1926	1.268
1927	1.021
1928	1.094
1929	0.968
1930	1.053
1931	1.058
1932	0.917
1933	1.074
1934	1.026
1935	1.157
1936	1.357
1937	1.246
1938	1.33
1939	1.156
1940	1.315
1941	1.453
1942	1.222
1943	1.041
1944	1.51
1945	1.481
1946	0.998
1947	1.147
1948	1.31
1949	1.232
1950	1.218
1951	1.093
1952	1.016
1953	1.106
1954	0.839
1955	0.967
1956	0.982
1957	0.924
1958	1.192
1959	0.79
1960	0.765
1961	0.928
1962	0.631
1963	0.887
1964	0.886
1965	1.054
1966	0.967
1967	1.13
1968	0.815
1969	0.806
1970	0.972
1971	0.807
1972	0.61
1973	0.784
1974	0.61
1975	0.804
1976	0.659
1977	0.828
1978	0.783
1979	0.749
1980	0.704
1981	0.702
1982	0.653
1983	0.671
1984	0.686
1985	0.735
1986	0.605
1987	0.812
1988	0.798
1989	0.849
1990	0.858
1991	0.556
1992	0.851
1993	0.596
1994	0.892
1995	0.853
1996	0.655