# northamerica_usa_nm503 - Ditch Canyon B - 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:
#
# Online_Resource: https://www.ncdc.noaa.gov/paleo/study/24611
#
# Original_Source_URL:https://www.ncdc.noaa.gov/paleo/study/2944
#
# Description/Documentation lines begin with #
# Data lines have no #
#
# Archive: Tree Rings
#--------------------
# Contribution_Date
#	Date: 2016-01-07
#--------------------
# Title
#	Study_Name: northamerica_usa_nm503 - Ditch Canyon B - 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 VaganovÃÂ¢ÃÂÃÂShashkin 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 4ÃÂ¢ÃÂÃÂ6 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 modelÃÂ¢ÃÂÃÂs 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.
#--------------------
#	Authors: Anderson, D.M., Tardif, R., Horlick, K., Erb, M.P., Hakim, G.J., Noone, D., Perkins, W.A., and E. Steig
#	Published_Date_or_Year: 2018
#	Published_Title: Additions to the last millennium reanalysis multi-proxy database
#	Journal_Name: Data Science Journal
#	Volume:
#	Edition:
#	Issue:
#	Pages:
#	Report_Number:
#	DOI:
#	Online_Resource:
#	Full_Citation: Anderson, D.M., Tardif, R., Horlick, K., Erb, M.P., Hakim, G., J., Noone, D., Perkins, W.A., and E. Steig, submitted. Additions to the last millennium reanalysis multi-proxy database. Data Science Journal.
#	Abstract: Progress in paleoclimatology increasingly occurs via data syntheses. We describe additions to a collection prepared for use in paleoclimate state estimation, specifically the Last Millennium Reanalysis (LMR).  The 2290 additional series include 2152 tree ring chronologies and 138 other series.  They supplement the collection used previously and together form a database titled LMRdb 1.0.0. The additional data draws from lake core, ice core, coral, speleothem, and tree ring archives, using published data primarily from the NOAA Paleoclimatology archive and a set of tree ring width chronologies standardized from raw International Tree Ring Data Bank ring width series. In contrast to many previous paleo compilations, the data were not selected (screened) on the basis of their environmental correlation, multi-century length, or other attributes. The inclusion of proxies sensitive to moisture and other environmental variables expands their use in data assimilation.  A preliminary calibration using linear regression with mean annual temperature reveals characteristics of the proxy series and their relationship to temperature, as well as the noise and error characteristics of the records. The additional records are structured as individual files in the NOAA Paleoclimatology format and archived at NOAA Paleoclimatology (Anderson et al. 2018) and will continue to be improved and expanded as part of the LMR Project.  The additions represent a four-fold increase in the number of records available for assimilation, provide expanded geographic coverage, and add additional proxy variables.  Applications include data assimilation, proxy system model development, and paleoclimate reconstruction using climate field reconstruction and other methods.
#------------------
# Funding_Agency
#	Funding_Agency_Name: Swiss National Science Foundation
#	Grant:
#--------------------
#	Funding_Agency_Name: National Science Foundation
#	Grant:AGS-1304263
#	Funding_Agency_Name: National Oceanic and Atmospheric Administration
#	Grant:NA14OAR4310176
#------------------
# Site_Information
#	Site_Name: Ditch Canyon B
#	Location:
#	Country: United States
#	Northernmost_Latitude: 36.98
#	Southernmost_Latitude: 36.98
#	Easternmost_Longitude: -107.07
#	Westernmost_Longitude: -107.07
#	Elevation: 2073 m
#--------------------
# Data_Collection
#	Collection_Name: northamerica_usa_nm503B
#	Earliest_Year: 1621
#	Most_Recent_Year: 1978
#	Time_Unit: y_ad
#	Core_Length:
#	Notes: {"database":{"database1":"LMR","database2":"Breits"}} {"climateInterpretation":{"basis":"", "climateVariable":"M", "climateVariableDetail":"air", "interpDirection":"positive", "seasonality":"[6, 7, 8]"}}{"VSLite_parameters":{"T1":"3.21354103749","T2":"16.0227859129","M1":"0.0234239964441","M2":"0.499663733515"}}
#--------------------
# Species
#	Species_Name: Douglas fir
#	Species_Code: PSME
#--------------------
# 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
1621	1.709
1622	0.779
1623	0.766
1624	0.519
1625	0.528
1626	0.386
1627	1.024
1628	0.828
1629	1.37
1630	2.18
1631	1.502
1632	0.489
1633	1.197
1634	1.635
1635	1.715
1636	1.241
1637	0.89
1638	0.785
1639	1.077
1640	1.818
1641	1.359
1642	0.726
1643	0.819
1644	1.038
1645	0.533
1646	1.213
1647	1.369
1648	0.423
1649	1.046
1650	1.412
1651	1.948
1652	0.719
1653	1.809
1654	0.512
1655	1.57
1656	1.387
1657	0.896
1658	0.525
1659	0.688
1660	1.13
1661	0.774
1662	0.602
1663	0.927
1664	0.271
1665	1.107
1666	0.454
1667	0.311
1668	0.278
1669	0.289
1670	0.355
1671	0.631
1672	0.48
1673	1.123
1674	1.27
1675	1.427
1676	0.399
1677	0.56
1678	0.827
1679	0.895
1680	1.031
1681	1.213
1682	1.168
1683	1.146
1684	0.238
1685	-0.006
1686	0.937
1687	0.818
1688	0.621
1689	0.989
1690	1.549
1691	0.896
1692	1.909
1693	2.162
1694	1.096
1695	1.24
1696	0.502
1697	0.987
1698	1.621
1699	1.856
1700	0.842
1701	1.685
1702	0.546
1703	0.94
1704	0.531
1705	0.998
1706	1.023
1707	0.3
1708	0.566
1709	0.735
1710	1.687
1711	1.69
1712	1.313
1713	0.717
1714	0.621
1715	0.904
1716	0.363
1717	0.817
1718	0.921
1719	1.504
1720	2.346
1721	1.255
1722	0.65
1723	1.451
1724	0.345
1725	1.158
1726	1.521
1727	1.54
1728	1.086
1729	0.051
1730	0.488
1731	0.749
1732	0.931
1733	0.771
1734	0.617
1735	0.084
1736	0.615
1737	0.486
1738	0.495
1739	0.401
1740	0.488
1741	0.562
1742	0.539
1743	0.892
1744	0.432
1745	0.913
1746	1.464
1747	1.994
1748	0.274
1749	1.685
1750	0.996
1751	0.606
1752	0.637
1753	0.465
1754	0.991
1755	0.556
1756	0.58
1757	0.554
1758	0.687
1759	0.782
1760	0.561
1761	0.351
1762	1.085
1763	0.733
1764	0.806
1765	0.835
1766	1.49
1767	0.709
1768	1.358
1769	1.335
1770	1.333
1771	2.073
1772	1.578
1773	0.261
1774	0.791
1775	1.01
1776	0.384
1777	0.854
1778	0.574
1779	0.553
1780	0.4
1781	0.79
1782	0.381
1783	0.75
1784	0.866
1785	0.904
1786	0.778
1787	1.469
1788	0.676
1789	0.561
1790	0.389
1791	1.286
1792	1.382
1793	1.387
1794	0.552
1795	1.006
1796	0.745
1797	0.843
1798	1.083
1799	0.95
1800	1.063
1801	0.368
1802	1.102
1803	0.992
1804	0.918
1805	0.686
1806	0.378
1807	1.243
1808	0.518
1809	0.715
1810	0.554
1811	1.323
1812	1.368
1813	1.061
1814	1.009
1815	1.834
1816	2.674
1817	2.092
1818	0.234
1819	0.368
1820	0.545
1821	1.556
1822	0.618
1823	0.671
1824	0.467
1825	0.825
1826	0.673
1827	0.464
1828	1.154
1829	1.008
1830	1.477
1831	1.479
1832	2.01
1833	1.646
1834	1.623
1835	1.81
1836	1.116
1837	1.223
1838	1.741
1839	1.983
1840	1.98
1841	1.469
1842	0.888
1843	1.255
1844	1.001
1845	1.097
1846	1.251
1847	0.094
1848	1.34
1849	1.368
1850	1.426
1851	0.229
1852	1.978
1853	1.703
1854	1.363
1855	1.456
1856	1.46
1857	0.814
1858	1.223
1859	0.927
1860	1.385
1861	0.089
1862	1.39
1863	0.978
1864	0.27
1865	1.194
1866	0.795
1867	1.498
1868	1.341
1869	2.114
1870	0.708
1871	0.689
1872	0.343
1873	1.117
1874	1.089
1875	0.854
1876	0.235
1877	1.479
1878	0.544
1879	0.581
1880	0.596
1881	0.641
1882	1.033
1883	0.627
1884	1.12
1885	1.652
1886	1.921
1887	1.331
1888	1.946
1889	1.557
1890	1.615
1891	1.659
1892	1.026
1893	0.625
1894	0.57
1895	0.571
1896	0.179
1897	1.232
1898	1.125
1899	0.192
1900	0.555
1901	0.661
1902	-0.009
1903	0.971
1904	-0.009
1905	1.063
1906	0.928
1907	1.362
1908	1.112
1909	1.236
1910	1.122
1911	1.205
1912	1.335
1913	0.702
1914	1.607
1915	1.934
1916	1.831
1917	1.927
1918	0.566
1919	1.743
1920	2.383
1921	2.389
1922	1.764
1923	0.841
1924	1.26
1925	0.754
1926	1.417
1927	1.004
1928	1.252
1929	0.833
1930	1.119
1931	0.832
1932	1.369
1933	1.363
1934	0.657
1935	1.045
1936	1.086
1937	1.387
1938	1.206
1939	0.767
1940	0.843
1941	1.702
1942	1.622
1943	0.896
1944	1.021
1945	0.801
1946	0.061
1947	0.665
1948	0.928
1949	1.239
1950	0.433
1951	0.237
1952	1.126
1953	0.468
1954	0.577
1955	0.418
1956	0.269
1957	0.554
1958	0.937
1959	0.161
1960	0.978
1961	0.653
1962	0.453
1963	0.644
1964	0.403
1965	0.901
1966	0.979
1967	0.497
1968	0.637
1969	0.728
1970	0.788
1971	0.808
1972	0.506
1973	1.284
1974	0.631
1975	1.149
1976	0.617
1977	0.243
1978	1.143