# Foy Lake, Montana Oxygen Isotope Data covering the last 2,200 years
#-----------------------------------------------------------------------            
#                World Data Service for Paleoclimatology, Boulder            
#                                  and            
#                     NOAA Paleoclimatology Program            
#             National Centers for Environmental Information (NCEI)            
#-----------------------------------------------------------------------            
# Template Version 3.0            
# Encoding: UTF-8            
# 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: https://www.ncdc.noaa.gov/paleo/study/23080
#     Online_Resource_Description: NOAA Landing Page
# Online_Resource:  https://www1.ncdc.noaa.gov/pub/data/paleo/pages2k/NAm2kHydro-2017/noaa-templates/data-version-1.0.0/Foy.Stevens.2006.txt
#     Online_Resource_Description:  This file.  NOAA WDS Paleo formatted metadata and data for version 1.0.0 of this dataset.
#
# Online_Resource:  https://www1.ncdc.noaa.gov/pub/data/paleo/pages2k/NAm2kHydro-2017/data-version-1.0.0/Foy.Stevens.2006.lpd
#     Online_Resource_Description:  Linked Paleo Data (LiPD) formatted file containing the same metadata and data as this file, for version 1.0.0 of this dataset.
#
# Original_Source_URL: this study
# Description/Documentation lines begin with #
# Data lines have no #
#
# Archive: Paleolimnology
# Parameter_Keywords: oxygen isotopes
# Dataset_DOI: 
#
#------------------
# Contribution_Date
#     Date: 2017-11-15
#------------------
# File_Last_Modified_Date
#     Modified_Date: 2017-11-15
#------------------
# Title
#     Study_Name: Foy Lake, Montana Oxygen Isotope Data covering the last 2,200 years
#------------------
# Investigators
#     Investigators: Stevens, Lora R.; Stone, Jeffery R.; Fritz, Sherilyn C.
#------------------
# Description_Notes_and_Keywords
#     Description: chronology via varve counting
#------------------
# Publication
#     Authors: Stevens, Lora R., Jeffery R. Stone, Josh Campbell, and Sherilyn C. Fritz 
#     Published_Date_or_Year: 2006
#     Published_Title: A 2200-yr record of hydrologic variability from Foy Lake, Montana, USA, inferred from diatom and geochemical data
#     Journal_Name: Quaternary Research
#     Volume: 65
#     Edition: 
#     Issue: 2
#     Pages: 264-274
#     Report: 
#     DOI: 10.1016/j.yqres.2005.08.024
#     Online_Resource: 
#     Full_Citation: 
#     Abstract: A 2200-yr long, high-resolution ( ~5 yr) record of drought variability in northwest Montana is inferred from diatoms and d18O values of bio- induced carbonate preserved in a varved lacustrine core from Foy Lake. A previously developed model of the diatom response to lake-level fluctuations is used to constrain estimates of paleolake levels derived from the diatom data. High-frequency (decadal) fluctuations in the de- trended d18O record mirror variations in wet/dry cycles inferred from Banff tree-rings, demonstrating the sensitivity of the oxygen-isotope values to changes in regional moisture balance. Low frequency (multi-centennial) isotopic changes may be associated with shifts in the seasonal distribution of precipitation. From 200 B.C. to A.D. 800, both diatom and isotope records indicate that climate was dry and lake level low, with poor diatom preservation and high organic carbon: nitrogen ratios. Subsequently, lake level rose slightly, although the climate was drier and more stable than modern conditions. At A.D. 1200, lake level increased to approximately 6 m below present elevation, after which the lake fluctuated between this elevation and full stage, with particularly cool and/or wetter conditions after 1700. The hydrologic balance of the lake shifted abruptly at 1894 because of the establishment of a lumber mill at the lake's outlet. Spectral analysis of the d18O data indicates that severe droughts occurred with multi-decadal (50 to 70 yr) frequency.
#------------------
# Funding_Agency
#     Funding_Agency_Name: 
#     Grant: 
#------------------
# Site_Information
#     Site_Name: Foy Lake
#     Location: Montana
#     Country: 
#     Northernmost_Latitude: 48.17
#     Southernmost_Latitude: 48.17
#     Easternmost_Longitude: -114.35
#     Westernmost_Longitude: -114.35
#     Elevation: 1006
#------------------
# Data_Collection
#     Collection_Name: Foy.Stevens.2006
#     Earliest_Year: 3112.939
#     Most_Recent_Year: -42.0
#     Time_Unit: BP
#     Core_Length: 
#     Notes: 
#------------------
# Species
#     Species_Name: 
#     Species_Code: 
#     Common_Name: 
#------------------
# Chronology_Section
#   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 ( 10 components: what, material, error, units, seasonality, archive, detail, method, C or N for Character or Numeric data, additional_information)
#
## year	age, ,,year CE, , , ,,N,   
## d18Ocarb	delta 18O,calcium carbonate,,per mil VPDB,,paleolimnology,,,N,sediments <63um
## age	age, ,,calendar years before present, ,, ,,N,
#
#------------------
# Data:        
# Data lines follow (have no #)        
# Data line format - tab-delimited text, variable short name as header)        
# Missing_Values: nan
#
year	d18Ocarb	age	
1992.0	-5.56	-42.0	
1990.5	-5.6	-40.5	
1987.5	-5.72	-37.5	
1984.0	-6.14	-34.0	
1981.0	-5.81	-31.0	
1978.0	-5.49	-28.0	
1975.5	-6.16	-25.5	
1973.0	-5.97	-23.0	
1970.0	-6.38	-20.0	
1967.5	-8.4	-17.5	
1963.0	-6.19	-13.0	
1958.5	-6.36	-8.5	
1954.0	-6.31	-4.0	
1947.5	-5.76	2.5	
1940.5	-5.22	9.5	
1935.0	-5.57	15.0	
1929.5	-5.54	20.5	
1923.5	-5.86	26.5	
1915.5	-6.65	34.5	
1905.0	-7.48	45.0	
1896.0	-7.4	54.0	
1890.5	-5.97	59.5	
1886.0	-3.97	64.0	
1882.0	-3.79	68.0	
1880.0	-3.98	70.0	
1879.0	-4.11	71.0	
1877.5	-3.92	72.5	
1876.0	nan	74.0	
1875.0	nan	75.0	
1872.5	-3.97	77.5	
1871.0	nan	79.0	
1870.0	nan	80.0	
1870.0	nan	80.0	
1869.0	-3.75	81.0	
1869.0	-3.83	81.0	
1868.0	nan	82.0	
1865.0	nan	85.0	
1860.0	-3.51	90.0	
1855.0	-3.87	95.0	
1850.0	-4.05	100.0	
1845.0	-5.41	105.0	
1840.0	-3.45	110.0	
1835.0	-3.97	115.0	
1830.0	-3.74	120.0	
1825.0	-3.74	125.0	
1820.0	-4.06	130.0	
1815.0	-4.17	135.0	
1810.0	-4.15	140.0	
1805.0	-4.22	145.0	
1800.0	-3.96	150.0	
1795.0	-4.67	155.0	
1790.0	-4.29	160.0	
1785.0	-4.96	165.0	
1780.0	-5.32	170.0	
1775.0	-5.65	175.0	
1770.0	-5.48	180.0	
1765.0	-2.47	185.0	
1760.0	-5.82	190.0	
1755.0	-5.4	195.0	
1750.0	-4.85	200.0	
1745.0	-4.62	205.0	
1740.0	-6.84	210.0	
1735.0	-6.03	215.0	
1729.0	-5.01	221.0	
1724.0	-3.64	226.0	
1719.0	-4.99	231.0	
1714.0	-3.65	236.0	
1708.0	-5.07	242.0	
1702.0	-3.69	248.0	
1697.0	-5.08	253.0	
1692.0	-3.72	258.0	
1687.0	-4.95	263.0	
1682.0	-3.99	268.0	
1677.0	-5.0	273.0	
1673.0	nan	277.0	
1672.0	-5.0	278.0	
1669.0	-5.02	281.0	
1665.0	-3.67	285.0	
1660.0	-5.19	290.0	
1654.0	-4.76	296.0	
1648.0	-3.98	302.0	
1642.0	-3.85	308.0	
1637.0	-4.18	313.0	
1630.0	-3.84	320.0	
1622.0	-4.27	328.0	
1616.0	-2.85	334.0	
1611.0	-3.04	339.0	
1606.0	-2.85	344.0	
1601.0	-5.14	349.0	
1594.0	-3.2	356.0	
1588.0	-7.36	362.0	
1582.0	-3.54	368.0	
1577.0	-4.35	373.0	
1572.0	-3.35	378.0	
1567.0	-4.23	383.0	
1562.0	-3.34	388.0	
1556.0	-3.82	394.0	
1550.0	-3.28	400.0	
1543.0	-4.01	407.0	
1535.0	-3.75	415.0	
1527.0	-4.39	423.0	
1519.0	-3.86	431.0	
1513.0	-4.15	437.0	
1507.0	-3.64	443.0	
1501.0	-4.42	449.0	
1495.0	-3.59	455.0	
1489.0	-3.69	461.0	
1483.0	-4.0	467.0	
1477.0	-4.55	473.0	
1471.0	-4.06	479.0	
1464.0	-4.63	486.0	
1458.0	-2.34	492.0	
1452.0	nan	498.0	
1445.0	-3.24	505.0	
1437.0	-2.78	513.0	
1429.0	-4.32	521.0	
1423.0	-4.05	527.0	
1416.0	-4.23	534.0	
1409.0	-4.92	541.0	
1403.0	-3.61	547.0	
1398.0	-4.53	552.0	
1392.0	-3.92	558.0	
1385.0	-3.97	565.0	
1378.0	-4.01	572.0	
1372.0	-5.6	578.0	
1366.0	-4.66	584.0	
1359.0	-5.02	591.0	
1351.0	-3.78	599.0	
1344.0	-4.54	606.0	
1337.0	-3.96	613.0	
1330.0	-4.34	620.0	
1321.0	-4.01	629.0	
1312.0	-3.79	638.0	
1302.0	-4.29	648.0	
1294.0	-5.18	656.0	
1287.0	-5.06	663.0	
1279.0	-7.01	671.0	
1270.0	-5.8	680.0	
1261.0	-4.01	689.0	
1252.0	-3.79	698.0	
1244.0	-3.8	706.0	
1237.0	-4.14	713.0	
1230.0	-3.85	720.0	
1224.0	-4.47	726.0	
1219.0	-4.8	731.0	
1214.0	-4.83	736.0	
1208.0	-3.87	742.0	
1202.0	-4.1	748.0	
1196.0	-4.14	754.0	
1188.0	-3.85	762.0	
1181.0	-3.78	769.0	
1177.0	-4.14	773.0	
1172.0	-3.75	778.0	
1167.0	-4.34	783.0	
1161.0	-3.57	789.0	
1154.0	-3.99	796.0	
1147.0	-3.29	803.0	
1140.0	-3.6	810.0	
1133.0	-2.84	817.0	
1125.0	-4.04	825.0	
1117.0	-3.42	833.0	
1109.0	-3.92	841.0	
1103.0	-4.2	847.0	
1098.0	-3.72	852.0	
1093.0	nan	857.0	
1087.0	-5.37	863.0	
1081.0	-4.44	869.0	
1073.0	-4.35	877.0	
1065.0	-4.74	885.0	
1057.0	-5.33	893.0	
1049.0	-4.02	901.0	
1043.0	-4.02	907.0	
1037.0	-4.53	913.0	
1029.0	-3.98	921.0	
1023.0	-3.94	927.0	
1017.0	-4.49	933.0	
1010.0	-4.49	940.0	
1003.0	-4.44	947.0	
994.0	-4.17	956.0	
986.0	-4.15	964.0	
980.0	-4.47	970.0	
974.0	-4.44	976.0	
969.0	-3.43	981.0	
962.0	-3.76	988.0	
955.0	-4.35	995.0	
949.0	-4.14	1001.0	
945.0	-4.15	1005.0	
942.0	-4.07	1008.0	
937.0	-3.88	1013.0	
933.0	-3.82	1017.0	
928.0	-3.95	1022.0	
921.0	-3.88	1029.0	
914.0	-4.05	1036.0	
909.0	-4.02	1041.0	
904.0	-3.95	1046.0	
898.0	-4.2	1052.0	
891.0	-4.02	1059.0	
885.0	-3.75	1065.0	
880.0	nan	1070.0	
877.0	-4.01	1073.0	
872.0	-4.64	1078.0	
865.0	-5.58	1085.0	
859.0	-4.52	1091.0	
853.0	-3.39	1097.0	
847.0	-3.66	1103.0	
841.0	-5.68	1109.0	
835.0	-5.28	1115.0	
829.0	-7.66	1121.0	
823.0	-4.92	1127.0	
815.0	-4.21	1135.0	
808.0	-3.9	1142.0	
802.0	-5.4	1148.0	
795.0	-4.14	1155.0	
787.0	-5.2	1163.0	
782.0	-4.14	1168.0	
777.0	-4.21	1173.0	
773.0	-4.69	1177.0	
768.0	-4.94	1182.0	
761.0	-4.83	1189.0	
752.0	-5.25	1198.0	
744.0	-3.75	1206.0	
737.0	-4.86	1213.0	
730.0	-4.21	1220.0	
723.0	-5.21	1227.0	
717.0	-4.67	1233.0	
710.0	-6.03	1240.0	
704.0	-4.39	1246.0	
699.0	-3.88	1251.0	
694.0	-3.69	1256.0	
689.0	-4.59	1261.0	
685.0	-3.93	1265.0	
681.0	-4.75	1269.0	
676.0	-4.61	1274.0	
671.0	-5.14	1279.0	
666.0	-5.3	1284.0	
661.0	-4.34	1289.0	
655.0	-3.2	1295.0	
648.0	-3.97	1302.0	
642.0	-3.96	1308.0	
636.0	-3.31	1314.0	
629.0	-3.28	1321.0	
624.0	-4.03	1326.0	
619.0	-4.36	1331.0	
612.0	-4.0	1338.0	
603.0	-4.17	1347.0	
594.0	-4.5	1356.0	
585.0	-4.0	1365.0	
576.0	-2.54	1374.0	
567.0	-2.48	1383.0	
562.0	-3.83	1388.0	
557.0	-2.69	1393.0	
551.0	-2.9	1399.0	
544.0	-2.88	1406.0	
537.0	-2.89	1413.0	
529.0	-2.64	1421.0	
524.0	-3.62	1426.0	
518.0	-3.95	1432.0	
510.0	-6.35	1440.0	
502.0	-3.58	1448.0	
496.0	-3.35	1454.0	
492.0	-3.59	1458.0	
487.0	-2.99	1463.0	
481.0	-3.17	1469.0	
476.0	-3.37	1474.0	
471.0	-3.73	1479.0	
466.0	-3.86	1484.0	
461.0	-4.97	1489.0	
456.0	-3.62	1494.0	
451.0	-5.2	1499.0	
445.0	-4.97	1505.0	
437.0	-4.03	1513.0	
431.0	-3.52	1519.0	
424.0	-3.88	1526.0	
418.0	-3.83	1532.0	
412.0	-3.72	1538.0	
407.0	-4.15	1543.0	
402.0	-3.89	1548.0	
396.0	-3.96	1554.0	
391.0	-4.15	1559.0	
384.0	-4.39	1566.0	
375.0	-4.23	1575.0	
367.0	-4.14	1583.0	
360.0	-5.46	1590.0	
355.0	-5.08	1595.0	
348.0	-5.24	1602.0	
340.0	-5.29	1610.0	
332.0	-4.69	1618.0	
324.0	-3.44	1626.0	
318.0	-3.99	1632.0	
314.0	-3.73	1636.0	
310.0	-3.54	1640.0	
306.0	-3.53	1644.0	
306.0	nan	1644.0	
306.0	nan	1644.0	
306.0	nan	1644.0	
306.0	nan	1644.0	
306.0	nan	1644.0	
306.0	nan	1644.0	
306.0	nan	1644.0	
306.0	nan	1644.0	
306.0	nan	1644.0	
306.0	nan	1644.0	
306.0	nan	1644.0	
306.0	nan	1644.0	
300.0	nan	1650.0	
293.0	-4.53	1657.0	
286.0	-4.02	1664.0	
279.0	-4.01	1671.0	
274.0	-3.94	1676.0	
268.0	-4.43	1682.0	
261.0	-4.3	1689.0	
256.0	-4.17	1694.0	
251.0	-5.65	1699.0	
247.0	-5.9	1703.0	
241.0	-4.86	1709.0	
235.0	-4.56	1715.0	
230.0	-4.92	1720.0	
225.0	-5.2	1725.0	
216.0	-5.39	1734.0	
207.0	-5.26	1743.0	
200.0	-4.7	1750.0	
191.0	-4.49	1759.0	
183.0	-4.34	1767.0	
175.0	-4.46	1775.0	
167.0	-4.08	1783.0	
160.0	-4.14	1790.0	
157.0	-5.52	1793.0	
150.0	-4.65	1800.0	
144.0	-6.32	1806.0	
139.0	-5.76	1811.0	
133.0	-6.92	1817.0	
126.0	-5.82	1824.0	
119.0	-5.49	1831.0	
111.0	-5.88	1839.0	
104.0	-5.69	1846.0	
97.0	-4.51	1853.0	
90.0	-6.78	1860.0	
84.0	nan	1866.0	
76.0	-4.29	1874.0	
70.0	-4.16	1880.0	
64.0	-4.49	1886.0	
58.0	-3.33	1892.0	
53.0	-4.59	1897.0	
47.0	-4.49	1903.0	
40.0	-5.66	1910.0	
35.0	-4.58	1915.0	
31.0	-4.92	1919.0	
25.0	-5.29	1925.0	
19.0	nan	1931.0	
13.0	-5.73	1937.0	
6.0	-3.8	1944.0	
-1.0	-4.5	1951.0	
-6.0	-5.064	1956.0	
-11.0	-4.246	1961.0	
-16.0	-4.642	1966.0	
-21.0	-4.354	1971.0	
-28.0	-4.908	1978.0	
-36.0	-5.947	1986.0	
-44.0	-4.664	1994.0	
-55.0	-5.041	2005.0	
-66.0	-5.029	2016.0	
-74.0	-5.764	2024.0	
-82.0	-4.481	2032.0	
-88.0	-5.027	2038.0	
-92.0	-5.941	2042.0	
-98.0	-5.884	2048.0	
-106.0	-4.458	2056.0	
-113.0	-4.316	2063.0	
-123.0	-4.732	2073.0	
-132.0	-5.871	2082.0	
-140.0	-4.051	2090.0	
-149.0	-4.601	2099.0	
-155.0	-4.801	2105.0	
-160.0	-4.06	2110.0	
-165.0	-3.523	2115.0	
-170.0	-4.459	2120.0	
-175.0	-4.99	2125.0	
-180.0	-4.231	2130.0	
-187.0	-3.436	2137.0	
-195.0	-3.692	2145.0	
-201.0	-3.938	2151.0	
-206.0	-4.656	2156.0	
-211.0	-4.742	2161.0	
-216.0	-4.909	2166.0	
-224.0	-5.351	2174.0	
-297.527	-4.524	2247.527	
-327.603	-4.628	2277.603	
-342.563	-5.077	2292.563	
-357.471	-5.252	2307.471	
-387.132	-5.432	2337.132	
-416.587	-5.354	2366.587	
-445.838	-5.834	2395.838	
-474.887	nan	2424.887	
-503.733	nan	2453.733	
-532.379	nan	2482.379	
-560.826	-7.549	2510.826	
-589.075	nan	2539.075	
-617.127	nan	2567.127	
-644.984	nan	2594.984	
-672.646	-5.262	2622.646	
-686.405	nan	2636.405	
-700.116	nan	2650.116	
-727.393	nan	2677.393	
-754.481	-5.192	2704.481	
-781.378	nan	2731.378	
-808.088	nan	2758.088	
-834.611	nan	2784.611	
-860.948	-4.373	2810.948	
-887.101	nan	2837.101	
-913.07	nan	2863.07	
-938.857	nan	2888.857	
-964.463	-4.523	2914.463	
-989.89	nan	2939.89	
-1015.137	nan	2965.137	
-1040.208	nan	2990.208	
-1065.102	-4.563	3015.102	
-1089.821	nan	3039.821	
-1114.366	nan	3064.366	
-1138.738	nan	3088.738	
-1162.939	-5.451	3112.939