# Big Round Lake, Baffin Island Varve Thickness 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: https://www.ncdc.noaa.gov/cdo/f?p=519:1:::::P1_STUDY_ID:6203
#
# Online_Resource: https://www.ncdc.noaa.gov/paleo/study/24611
#
# Original_Source_URL: http://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/canada/baffin/big-round2008.txt
# 
# Description/Documentation lines begin with #
# Data lines have no #
#
# Archive: Lake Cores
#--------------------
# Contribution_Date
#	Date: 2008-11-01
#--------------------
# Title
#	Study_Name: Big Round Lake, Baffin Island Varve Thickness Data
#--------------------
# Investigators
#       Investigators: Thomas, E.K.; Briner, J.P. 
#--------------------
# Description_and_Notes
#	Description: Varve thickness and varve-inferred July-August September temperature  from Big Round Lake, Baffin Island, Nunavut, Canada:  69deg 52'N, 68deg 50'W, 180m elev. 
#--------------------
# Publication 
#       Authors: Thomas, E.K.; Briner, J.P. 
#       Published_Date_or_Year: 2009
#       Published_Title: Climate of the past millennium inferred from varved proglacial lake sediments on northeast Baffin Island, Arctic Canada. 
#       Journal_Name: Journal of Paleolimnology
#       Volume: 41
#       Edition: 1
#       Issue: 
#       Pages: 209-224
#       DOI: 10.1007/s10933-008-9258-7
#       Online_Resource: 
#       Full_Citation: Thomas, E.K. and J.P. Briner. 2009. Climate of the past millennium inferred from varved proglacial lake sediments on northeast Baffin Island, Arctic Canada. Journal of Paleolimnology, 41(1), 209-224. doi: 10.1007/s10933-008-9258-7
#       Abstract: This study uses 239+240Pu-dated varved sediments from Big Round Lake, a proglacial lake on northeast Baffin Island, Arctic Canada to generate a 1000-year-long, annual-resolution record of past climate. Varve thickness is positively correlated with July-August-September temperature measured at Clyde River, 70 km to the north of the lake (r = 0.46, p<0.001). We therefore interpret the variability and trends in varve thickness to partially represent summer temperature. The coolest Little Ice Age temperatures occurred in this record from 1575 to 1760 AD and were approximately 1.5C cooler than today (average from 1995 to 2005 AD) and 0.2C cooler than the last millennium (average from 1000 to 2000 AD). Pre-twentieth-century warmth occurred during two intervals, 970-1150 AD and 1375-1575 AD; temperatures were approximately 1.2C cooler than today, but 0.1C warmer than the last millennium. The Big Round Lake varve-thickness record contains features similar to that reconstructed elsewhere in the eastern Canadian Arctic. This high-resolution quantitative record expands our understanding of arctic climate during the past millennium.
#------------------
#	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: US National Science Foundation
#       Grant: Graduate Research Fellowship
#------------------
# Funding_Agency 
#       Funding_Agency_Name: Geological Society of America
#       Grant: student research grant
#------------------
#	Funding_Agency_Name: National Science Foundation
#	Grant:AGS-1304263
#	Funding_Agency_Name: National Oceanic and Atmospheric Administration
#	Grant:NA14OAR4310176
#------------------
# Site_Information 
#       Site_Name: Big Round Lake, Baffin Island, Canada
#       Location: North America>Canada
#	Country: Canada  
#	Northernmost_Latitude: 69.866 
# 	Southernmost_Latitude: 69.866 
# 	Easternmost_Longitude: -68.833 
# 	Westernmost_Longitude: -68.833 
# 	Elevation: 180 m  
#------------------
# Data_Collection   
#	Collection_Name: 09cana01a 
#	Earliest_Year: 971
#	Most_Recent_Year: 2003
#	Time_Unit: y_ad
#	Core_Length: 
#	Notes: {"database":"LMR"}  
#------------------
# Species
#	Species_Name:  
#	Common_Name: 
#------------------
# 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, , ,y_ad, , Lake Cores, , ,N
##varve	varve thickness, varve sediment, , , , Lake Cores, , ,N
#
#----------------
# Data:
# Data lines follow (have no #)
# Data line format - tab-delimited text, variable short name as header
# Missing Values: NAN
#
age	varve
2003	1.35
2002	1.571
2001	1.126
2000	1.51
1999	0.974
1998	0.695
1997	0.479
1996	0.762
1995	0.814
1994	0.815
1993	0.58
1992	0.493
1991	1.629
1990	0.57
1989	0.721
1988	0.985
1987	0.833
1986	0.538
1985	0.467
1984	0.69
1983	1.3
1982	0.579
1981	0.959
1980	0.479
1979	0.498
1978	0.417
1977	0.884
1976	1.466
1975	1.245
1974	1.078
1973	1.143
1972	0.257
1971	0.885
1970	1.004
1969	0.626
1968	0.819
1967	0.676
1966	2.146
1965	0.729
1964	1.167
1963	1.1
1962	1.107
1961	1.136
1960	0.841
1959	1.254
1958	1.152
1957	0.972
1956	1.065
1955	0.709
1954	1.393
1953	1.811
1952	1.514
1951	1.357
1950	0.773
1949	0.975
1948	0.942
1947	1.028
1946	0.78
1945	0.846
1944	0.757
1943	1.38
1942	1.229
1941	1.397
1940	0.891
1939	1.192
1938	2.755
1937	1.209
1936	1.39
1935	1.676
1934	2.896
1933	1.26
1932	0.632
1931	0.947
1930	0.925
1929	0.816
1928	1.154
1927	0.913
1926	1.184
1925	0.239
1924	1.187
1923	0.572
1922	0.689
1921	0.209
1920	0.492
1919	0.453
1918	0.892
1917	1.904
1916	0.562
1915	0.453
1914	0.798
1913	1.042
1912	0.749
1911	0.709
1910	0.314
1909	1.571
1908	0.719
1907	1.069
1906	0.999
1905	0.289
1904	1.276
1903	1.088
1902	0.686
1901	1.024
1900	0.502
1899	0.623
1898	0.556
1897	0.811
1896	0.692
1895	0.375
1894	1.042
1893	0.439
1892	1.213
1891	0.997
1890	0.638
1889	0.41
1888	0.283
1887	0.658
1886	1.2
1885	0.799
1884	1.256
1883	0.831
1882	0.545
1881	0.903
1880	0.246
1879	0.267
1878	0.205
1877	0.6
1876	0.444
1875	0.471
1874	0.412
1873	0.255
1872	0.577
1871	0.942
1870	1.491
1869	1.504
1868	0.249
1867	0.468
1866	0.372
1865	0.403
1864	0.283
1863	0.405
1862	0.723
1861	0.453
1860	1.454
1859	1.153
1858	2.394
1857	0.236
1856	0.334
1855	0.284
1854	0.554
1853	0.787
1852	0.895
1851	0.581
1850	0.518
1849	1.226
1848	1.288
1847	0.657
1846	0.708
1845	2.109
1844	0.502
1843	0.809
1842	0.608
1841	0.959
1840	0.629
1839	1.378
1838	1.441
1837	0.42
1836	0.558
1835	0.799
1834	0.495
1833	0.342
1832	0.478
1831	1.505
1830	1.015
1829	0.859
1828	0.929
1827	1.449
1826	0.73
1825	0.425
1824	0.181
1823	0.148
1822	0.443
1821	0.382
1820	0.345
1819	0.537
1818	0.216
1817	0.239
1816	0.148
1815	0.216
1814	0.439
1813	0.541
1812	0.197
1811	0.322
1810	0.19
1809	0.158
1808	0.966
1807	0.828
1806	0.627
1805	0.696
1804	0.627
1803	0.215
1802	1.162
1801	0.502
1800	0.242
1799	0.586
1798	1.399
1797	0.464
1796	0.61
1795	0.643
1794	1.522
1793	1.222
1792	1.073
1791	0.481
1790	0.216
1789	0.198
1788	0.232
1787	0.317
1786	0.839
1785	0.496
1784	1.01
1783	0.917
1782	0.231
1781	0.488
1780	0.282
1779	1.197
1778	0.205
1777	0.342
1776	0.932
1775	0.299
1774	0.145
1773	0.171
1772	0.222
1771	0.205
1770	0.205
1769	0.864
1768	0.333
1767	0.214
1766	0.128
1765	0.236
1764	0.519
1763	0.289
1762	0.54
1761	0.26
1760	0.116
1759	0.11
1758	0.2
1757	0.588
1756	0.526
1755	0.501
1754	1.103
1753	0.167
1752	0.2
1751	0.277
1750	0.873
1749	1.128
1748	0.412
1747	0.257
1746	0.264
1745	0.356
1744	0.47
1743	0.347
1742	0.412
1741	0.302
1740	0.466
1739	0.445
1738	0.224
1737	0.295
1736	0.116
1735	0.597
1734	0.559
1733	0.27
1732	0.128
1731	0.456
1730	0.279
1729	0.238
1728	0.624
1727	0.264
1726	0.573
1725	0.495
1724	0.417
1723	0.27
1722	0.154
1721	0.622
1720	0.179
1719	0.43
1718	0.097
1717	2.007
1716	1.266
1715	0.145
1714	0.685
1713	0.641
1712	0.385
1711	0.291
1710	0.231
1709	0.214
1708	0.419
1707	0.103
1706	0.111
1705	0.13
1704	0.205
1703	0.103
1702	0.231
1701	0.122
1700	0.141
1699	0.16
1698	0.205
1697	0.154
1696	0.41
1695	0.635
1694	0.372
1693	0.648
1692	0.257
1691	0.758
1690	0.225
1689	0.277
1688	0.218
1687	0.135
1686	0.584
1685	0.212
1684	0.353
1683	0.507
1682	0.084
1681	1.002
1680	0.346
1679	0.474
1678	1.046
1677	0.129
1676	0.239
1675	0.845
1674	0.443
1673	0.62
1672	0.247
1671	0.244
1670	0.162
1669	0.245
1668	0.971
1667	0.359
1666	0.647
1665	0.622
1664	0.205
1663	0.436
1662	0.167
1661	0.276
1660	0.122
1659	0.263
1658	0.397
1657	0.366
1656	0.508
1655	0.494
1654	0.776
1653	0.603
1652	0.449
1651	0.295
1650	0.302
1649	0.475
1648	0.212
1647	0.353
1646	0.347
1645	0.398
1644	0.437
1643	0.367
1642	0.424
1641	0.462
1640	0.437
1639	0.224
1638	0.269
1637	0.154
1636	0.308
1635	0.276
1634	0.546
1633	1.519
1632	0.29
1631	0.155
1630	0.303
1629	0.188
1628	0.688
1627	0.466
1626	0.149
1625	0.308
1624	0.345
1623	0.456
1622	0.437
1621	0.772
1620	0.232
1619	0.172
1618	0.241
1617	0.317
1616	0.729
1615	0.163
1614	0.257
1613	0.513
1612	0.171
1611	0.361
1610	0.412
1609	0.223
1608	0.488
1607	0.109
1606	0.501
1605	0.295
1604	0.173
1603	0.379
1602	0.61
1601	0.578
1600	0.257
1599	0.591
1598	0.199
1597	0.199
1596	0.641
1595	0.6185
1594	0.5495
1593	0.3825
1592	0.249
1591	0.14
1590	0.251
1589	0.125
1588	0.1305
1587	0.5455
1586	0.39
1585	1.053
1584	0.287
1583	0.445
1582	0.4085
1581	0.97
1580	1.1535
1579	0.673
1578	0.1435
1577	0.3245
1576	0.4995
1575	0.6165
1574	5.383
1573	3.187
1572	1.9375
1571	1.256
1570	0.327
1569	1.2795
1568	0.263
1567	0.3275
1566	2.293
1565	0.5235
1564	1.1325
1563	2.734
1562	0.843
1561	1.1205
1560	0.3655
1559	0.968
1558	0.277
1557	0.809
1556	1.111
1555	0.1845
1554	0.58
1553	1.063
1552	0.869
1551	0.6925
1550	0.5215
1549	1.0025
1548	0.533
1547	0.198
1546	0.119
1545	0.1505
1544	0.311
1543	0.252
1542	0.704
1541	0.953
1540	1.544
1539	0.807
1538	0.609
1537	1.0425
1536	1.679
1535	2.266
1534	0.2405
1533	0.4555
1532	1.3545
1531	0.4745
1530	0.527
1529	0.954
1528	1.108
1527	1.1585
1526	0.881
1525	0.608
1524	1.197
1523	0.7175
1522	0.6715
1521	0.384
1520	0.308
1519	2.82
1518	0.109
1517	0.139
1516	0.392
1515	0.332
1514	2.239
1513	2.119
1512	0.737
1511	1.48
1510	0.252
1509	0.212
1508	0.749
1507	0.211
1506	0.181
1505	5.519
1504	0.408
1503	1.003
1502	0.491
1501	0.525
1500	0.43
1499	0.438
1498	1.346
1497	0.361
1496	0.434
1495	2.047
1494	0.316
1493	0.561
1492	1.806
1491	0.791
1490	0.315
1489	1.492
1488	0.529
1487	0.487
1486	0.376
1485	0.285
1484	4.178
1483	0.697
1482	0.133
1481	0.122
1480	0.122
1479	0.829
1478	0.56
1477	0.578
1476	0.316
1475	1.242
1474	0.144
1473	0.468
1472	0.504
1471	0.887
1470	0.656
1469	0.659
1468	0.57
1467	0.656
1466	0.176
1465	1.149
1464	0.438
1463	0.279
1462	0.325
1461	0.234
1460	0.898
1459	0.393
1458	0.394
1457	0.884
1456	0.226
1455	0.808
1454	0.445
1453	0.151
1452	0.272
1451	0.287
1450	1.2
1449	1.999
1448	0.08
1447	1.132
1446	0.438
1445	0.896
1444	0.332
1443	0.439
1442	2.236
1441	0.428
1440	0.493
1439	0.222
1438	0.194
1437	1.031
1436	0.305
1435	1.129
1434	1.512
1433	0.864
1432	1.282
1431	0.618
1430	0.762
1429	2.016
1428	1.174
1427	0.711
1426	1.236
1425	0.464
1424	0.846
1423	0.212
1422	1.008
1421	0.425
1420	0.172
1419	0.437
1418	0.197
1417	0.076
1416	0.113
1415	1.323
1414	0.311
1413	0.379
1412	0.629
1411	0.448
1410	0.332
1409	0.192
1408	0.427
1407	0.243
1406	0.258
1405	0.303
1404	2.42
1403	0.282
1402	0.477
1401	0.526
1400	1.309
1399	0.295
1398	0.897
1397	1.338
1396	0.967
1395	0.815
1394	0.6
1393	0.161
1392	0.684
1391	0.159
1390	0.664
1389	0.454
1388	0.097
1387	0.097
1386	0.078
1385	0.223
1384	0.098
1383	0.199
1382	0.199
1381	0.112
1380	0.789
1379	0.514
1378	0.133
1377	0.142
1376	0.24
1375	0.314
1374	0.635
1373	0.282
1372	0.328
1371	0.237
1370	0.493
1369	0.387
1368	0.144
1367	0.174
1366	0.765
1365	0.247
1364	0.359
1363	0.371
1362	0.167
1361	0.433
1360	0.906
1359	0.418
1358	0.322
1357	0.136
1356	0.503
1355	0.096
1354	0.121
1353	0.226
1352	0.111
1351	0.428
1350	0.332
1349	0.332
1348	0.222
1347	0.458
1346	0.252
1345	0.412
1344	0.936
1343	0.352
1342	0.297
1341	0.161
1340	0.156
1339	0.372
1338	0.252
1337	0.443
1336	0.519
1335	0.332
1334	1.137
1333	1.077
1332	0.765
1331	0.247
1330	1.384
1329	0.423
1328	0.649
1327	0.081
1326	0.518
1325	0.468
1324	0.282
1323	0.211
1322	0.413
1321	0.111
1320	0.111
1319	1.213
1318	0.85
1317	0.483
1316	1.006
1315	0.166
1314	0.674
1313	0.196
1312	0.302
1311	0.528
1310	0.498
1309	0.438
1308	0.362
1307	0.312
1306	0.382
1305	0.367
1304	0.87
1303	0.247
1302	0.161
1301	0.403
1300	0.307
1299	0.282
1298	0.689
1297	0.352
1296	0.186
1295	0.131
1294	0.362
1293	0.709
1292	0.961
1291	0.106
1290	0.221
1289	0.443
1288	1.887
1287	0.52
1286	0.374
1285	0.715
1284	0.347
1283	0.267
1282	0.121
1281	0.292
1280	1.072
1279	0.317
1278	0.207
1277	0.79
1276	0.237
1275	0.171
1274	0.181
1273	0.403
1272	0.081
1271	0.499
1270	0.156
1269	0.448
1268	0.362
1267	0.081
1266	0.257
1265	0.121
1264	0.919
1263	0.302
1262	0.168
1261	0.37
1260	0.151
1259	0.534
1258	0.847
1257	0.701
1256	0.102
1255	0.571
1254	0.747
1253	0.278
1252	0.243
1251	0.272
1250	0.237
1249	0.684
1248	0.136
1247	0.502
1246	0.287
1245	0.574
1244	0.358
1243	0.443
1242	0.664
1241	0.272
1240	0.725
1239	0.279
1238	0.318
1237	1.328
1236	0.349
1235	0.144
1234	0.321
1233	0.123
1232	0.586
1231	0.19
1230	1.063
1229	0.738
1228	0.312
1227	0.663
1226	0.129
1225	0.13
1224	0.259
1223	0.224
1222	0.161
1221	0.441
1220	0.261
1219	0.207
1218	0.191
1217	0.372
1216	0.577
1215	1.049
1214	0.408
1213	0.597
1212	0.17
1211	0.284
1210	0.178
1209	0.319
1208	0.351
1207	0.628
1206	0.16
1205	0.535
1204	0.258
1203	0.432
1202	0.249
1201	0.643
1200	0.317
1199	0.318
1198	0.475
1197	0.211
1196	0.294
1195	0.326
1194	0.287
1193	0.151
1192	0.211
1191	0.243
1190	0.302
1189	0.257
1188	0.34
1187	0.839
1186	0.144
1185	0.257
1184	0.392
1183	0.625
1182	0.526
1181	0.345
1180	0.478
1179	1.086
1178	0.333
1177	0.755
1176	0.261
1175	0.224
1174	0.289
1173	0.377
1172	0.394
1171	0.324
1170	0.352
1169	0.919
1168	0.199
1167	0.471
1166	0.11
1165	0.461
1164	0.236
1163	0.575
1162	0.297
1161	0.459
1160	0.282
1159	0.201
1158	0.311
1157	0.29
1156	0.35
1155	0.324
1154	0.161
1153	3.381
1152	0.485
1151	1.036
1150	0.302
1149	0.675
1148	0.346
1147	0.184
1146	1.757
1145	0.318
1144	0.638
1143	0.258
1142	1.331
1141	2.747
1140	0.081
1139	0.096
1138	0.156
1137	0.166
1136	0.367
1135	0.221
1134	0.292
1133	0.654
1132	0.767
1131	0.296
1130	0.204
1129	0.4
1128	0.173
1127	0.323
1126	0.681
1125	0.286
1124	0.232
1123	0.888
1122	0.889
1121	1.017
1120	0.422
1119	0.492
1118	3.635
1117	0.357
1116	0.419
1115	0.494
1114	0.247
1113	0.223
1112	0.239
1111	0.094
1110	0.473
1109	0.818
1108	0.428
1107	1.104
1106	2.673
1105	0.155
1104	1.085
1103	0.138
1102	0.452
1101	0.618
1100	0.441
1099	0.912
1098	0.295
1097	0.896
1096	0.67
1095	0.566
1094	0.19
1093	0.29
1092	0.212
1091	0.826
1090	0.179
1089	0.173
1088	0.153
1087	0.221
1086	1.527
1085	0.96
1084	0.175
1083	0.169
1082	0.166
1081	1.715
1080	0.284
1079	0.196
1078	0.223
1077	0.286
1076	0.537
1075	0.094
1074	0.459
1073	0.111
1072	0.236
1071	0.697
1070	0.304
1069	0.328
1068	0.288
1067	0.256
1066	0.599
1065	0.246
1064	0.293
1063	1.816
1062	0.633
1061	0.397
1060	0.199
1059	0.422
1058	0.365
1057	0.37
1056	0.351
1055	0.237
1054	0.28
1053	0.127
1052	0.148
1051	0.447
1050	0.305
1049	1.263
1048	0.278
1047	0.2
1046	0.077
1045	0.113
1044	0.257
1043	0.877
1042	0.436
1041	0.431
1040	0.287
1039	0.255
1038	0.215
1037	0.592
1036	0.375
1035	0.621
1034	0.164
1033	0.305
1032	0.649
1031	0.688
1030	0.486
1029	0.419
1028	0.433
1027	0.241
1026	1.166
1025	0.298
1024	0.309
1023	0.577
1022	0.338
1021	0.149
1020	0.325
1019	0.219
1018	0.503
1017	0.277
1016	0.505
1015	0.455
1014	0.728
1013	0.516
1012	0.431
1011	0.142
1010	0.702
1009	0.472
1008	1.512
1007	0.307
1006	0.655
1005	0.189
1004	0.797
1003	0.267
1002	0.887
1001	1.243
1000	0.324
999	0.366
998	0.263
997	0.278
996	0.537
995	0.598
994	1.899
993	0.117
992	0.461
991	0.242
990	0.444
989	0.323
988	0.101
987	0.158
986	0.563
985	0.279
984	0.287
983	0.132
982	0.091
981	0.169
980	0.477
979	0.409
978	0.385
977	0.343
976	0.332
975	0.263
974	0.649
973	0.332
972	0.094
971	2.588