# australia_newz026 - Logos Hill 6 - 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: australia_newz026 - Logos Hill 6 - 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: Logos Hill 6
#	Location:
#	Country: New Zealand
#	Northernmost_Latitude: -43.08
#	Southernmost_Latitude: -43.08
#	Easternmost_Longitude: 171.7
#	Westernmost_Longitude: 171.7
#	Elevation: 900 m
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# Data_Collection
#	Collection_Name: australia_newz026B
#	Earliest_Year: 1840
#	Most_Recent_Year: 1979
#	Time_Unit: y_ad
#	Core_Length:
#	Notes: {"sensitivity":"temperature"}{"T1":"2.86119660118"}{"T2":"11.1836749003"}{"M1":"0.0233444969067"}{"M2":"0.640234131303"}
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# Species
#	Species_Name: mountain beech nothofagus
#	Species_Code: NOSO
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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
1840	1.028
1841	0.953
1842	0.87
1843	0.686
1844	0.359
1845	0.981
1846	0.842
1847	0.965
1848	1.079
1849	1.221
1850	1.311
1851	1.041
1852	0.878
1853	0.773
1854	0.931
1855	1.04
1856	0.959
1857	0.946
1858	0.953
1859	0.767
1860	1.018
1861	0.881
1862	0.694
1863	1.079
1864	0.974
1865	0.949
1866	0.967
1867	1.031
1868	1.174
1869	1.155
1870	0.714
1871	0.589
1872	0.575
1873	0.747
1874	0.967
1875	0.905
1876	0.874
1877	0.883
1878	1.061
1879	0.882
1880	0.959
1881	0.703
1882	0.597
1883	0.927
1884	1.178
1885	0.52
1886	0.714
1887	0.766
1888	0.99
1889	0.602
1890	1.015
1891	0.641
1892	0.897
1893	1.578
1894	1.19
1895	1.223
1896	0.896
1897	1.094
1898	1.445
1899	1.023
1900	1.397
1901	1.859
1902	1.422
1903	1.162
1904	1.205
1905	1.057
1906	0.965
1907	0.378
1908	0.919
1909	1.596
1910	1.583
1911	1.256
1912	1.182
1913	0.994
1914	1.211
1915	1.228
1916	0.921
1917	1.263
1918	1.105
1919	1.122
1920	0.992
1921	1.026
1922	1.176
1923	1.425
1924	0.99
1925	1.46
1926	0.933
1927	0.764
1928	0.99
1929	1.101
1930	1.495
1931	1.135
1932	1.005
1933	0.993
1934	0.582
1935	0.392
1936	0.297
1937	0.867
1938	0.89
1939	1.13
1940	1.07
1941	1.012
1942	0.98
1943	0.372
1944	0.384
1945	1.04
1946	1.175
1947	0.944
1948	1.196
1949	1.058
1950	0.93
1951	0.89
1952	0.831
1953	0.543
1954	0.597
1955	0.51
1956	0.782
1957	1.071
1958	0.743
1959	0.751
1960	0.825
1961	0.742
1962	0.669
1963	0.652
1964	1.122
1965	1.282
1966	0.999
1967	1.241
1968	0.95
1969	0.806
1970	0.65
1971	0.633
1972	0.753
1973	0.776
1974	0.964
1975	0.907
1976	1.225
1977	1.075
1978	0.982
1979	1.589