# Jämtland 900 Year Tree Ring MXD Temperature Reconstruction #----------------------------------------------------------------------- # World Data Center for Paleoclimatology, Boulder # and # NOAA Paleoclimatology Program #----------------------------------------------------------------------- # NOTE: Please cite original reference 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=519:1:0::::P1_study_id:13644 # # Online_Resource: https://www.ncdc.noaa.gov/paleo/study/24611 # # Original_Source_URL: ftp://ftp.ncdc.noaa.gov/pub/data/paleo/treering/reconstructions/europe/sweden/gunnarson2011temp.txt # # Description/Documentation lines begin with # # Data lines have no # # # Archive: Climate Reconstructions # -------------------- # Contribution_date # Date: 2012-12-19 # -------------------- # Title # Study_Name: Jämtland 900 Year Tree Ring MXD Temperature Reconstruction # -------------------- # Investigators # Investigators: Gunnarson, B.E.; Linderholm, H.W.; Moberg, A. # -------------------- # Description_and_Notes # Description: # Tree ring maximum density temperature reconstruction for AD 1100-2006 # based on a combination of old historical data and new data. # Dry dead wood covers the period AD 1107-1907 and living trees cover the period AD 1450-2006. # No subfossil lake material is included in the MXD data. # # Jämtland area, central Sweden (62.21-62.31°N, 13.15-13.60°E) # 700-650 m a.s.l. (ITRAX) # # -------------------- # Publication # Authors: Björn E. Gunnarson, Hans W. Linderholm, Anders Moberg # Published_Date_or_Year: 2011 # Published_Title: Improving a tree-ring reconstruction from west-central Scandinavia: 900 years of warm-season temperatures # Journal_Name: Climate Dynamics # Volume: 36 # Edition: # Issue: 1-2 # Pages: 97-108 # DOI: # Online_Resource: 10.1007/s00382-010-0783-5 # Full_Citation: # Abstract: Dendroclimatological sampling of Scots pine (Pinus sylvestris L.) has been made in the province of Jämtland, in the west-central Scandinavian mountains, since the 1970s. The tree-ring width (TRW) chronology spans several thousand years and has been used to reconstruct June-August temperatures back to 1632 bc. A maximum latewood density (MXD) dataset, covering the period ad 1107-1827 (with gap 1292-1315) was presented in the 1980s by Fritz Schweingruber. Here we combine these historical MXD data with recently collected MXD data covering ad 1292-2006 into a single reconstruction of April-September temperatures for the period ad 1107-2006. Regional curve standardization (RCS) provides more low-frequency variability than “non-RCS” and stronger correlation with local seasonal temperatures (51% variance explained). The MXD chronology shows a stronger relationship with temperatures than the TRW data, but the two chronologies show similar multi-decadal variations back to ad 1500. According to the MXD chronology, the period since ad 1930 and around ad 1150-1200 were the warmest during the last 900 years. Due to large uncertainties in the early part of the combined MXD chronology, it is not possible to conclude which period was the warmest. More sampling of trees growing near the tree-line is needed to further improve the MXD chronology. # -------------------- # 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: European Union # Grant: Millennium Project Contract No 017008 GOCE # -------------------- # Funding_Agency_Name: National Science Foundation # Grant:AGS-1304263 # Funding_Agency_Name: National Oceanic and Atmospheric Administration # Grant:NA14OAR4310176 #------------------ # Site_Information # Site_Name: Jämtland # Location: Europe>Northern Europe>Scandanavia>Sweden # Country: Sweden # Northernmost_Latitude: 62.31 # Southernmost_Latitude: 62.21 # Easternmost_Longitude: 13.60 # Westernmost_Longitude: 13.15 # Elevation: 350 m # -------------------- # Data_Collection # Collection_Name: 11Jamt01 # Earliest_Year: 1107 # Most_Recent_Year: 2007 # Time_Unit: AD # -------------------- # 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 ##temp Apr-Sept surface temperature, , ,degrees C, April-September, Climate Reconstructions, , RCS method, N # # -------------------- # Data: # Data lines follow (have no #) # Data line format - tab-delimited text, variable short name as header # Missing values: NAN # age temp 1107 7.44 1108 7.73 1109 7.47 1110 9.01 1111 7.91 1112 9.07 1113 8.15 1114 9.18 1115 8.23 1116 8.62 1117 8.89 1118 9.23 1119 9.51 1120 10.06 1121 9.69 1122 9.56 1123 9.36 1124 9.77 1125 9.47 1126 9.13 1127 8.74 1128 9.01 1129 9.67 1130 9.34 1131 9.87 1132 10.04 1133 8.99 1134 9.69 1135 10.22 1136 9.36 1137 9.56 1138 9.83 1139 9.74 1140 9.76 1141 9.9 1142 9.25 1143 9.86 1144 9.92 1145 9.71 1146 9.66 1147 10.04 1148 10.08 1149 10.25 1150 10.31 1151 9.94 1152 9.71 1153 9.93 1154 9.83 1155 10.37 1156 10.35 1157 9.74 1158 10.3 1159 10.2 1160 10.01 1161 10.24 1162 10.05 1163 9.44 1164 10.08 1165 9.63 1166 9.66 1167 9.78 1168 10.04 1169 9.53 1170 9.95 1171 9.57 1172 9.67 1173 9.51 1174 9.48 1175 9.78 1176 9.46 1177 10.12 1178 10.02 1179 9.83 1180 9.77 1181 9.5 1182 9.92 1183 9.75 1184 10.09 1185 9.71 1186 9.69 1187 9.93 1188 9.84 1189 9.96 1190 10.02 1191 9.92 1192 9.66 1193 9.5 1194 9.96 1195 10.11 1196 9.96 1197 9.67 1198 10.32 1199 9.94 1200 10.23 1201 9.93 1202 9.68 1203 10 1204 9.94 1205 9.93 1206 10.25 1207 9.54 1208 9.47 1209 9.95 1210 9.8 1211 10.28 1212 9.97 1213 10.41 1214 10.02 1215 9.92 1216 10.14 1217 9.94 1218 9.42 1219 9.5 1220 9.69 1221 9.71 1222 9.64 1223 9.41 1224 9.86 1225 9.12 1226 9.39 1227 10.33 1228 9.61 1229 8.95 1230 9.15 1231 9.52 1232 8.83 1233 9.13 1234 9.01 1235 9.25 1236 8.91 1237 8.46 1238 8.37 1239 8.57 1240 9.23 1241 9 1242 8.96 1243 9.02 1244 9.17 1245 9.01 1246 8.95 1247 9.24 1248 9.05 1249 9.14 1250 9.43 1251 8.81 1252 8 1253 9.47 1254 8.81 1255 8.92 1256 9.1 1257 9.4 1258 8.33 1259 8.57 1260 8.29 1261 8.28 1262 8.52 1263 8.72 1264 8.26 1265 8.92 1266 8.31 1267 8.72 1268 8.24 1269 9.43 1270 8.66 1271 9.51 1272 9.18 1273 8.74 1274 8.21 1275 7.78 1276 8.54 1277 8.37 1278 9.24 1279 8.31 1280 8.62 1281 8.5 1282 8.61 1283 8.66 1284 9.19 1285 9.53 1286 9.46 1287 9.4 1288 9.65 1289 9.17 1290 8.96 1291 9.09 1292 9.17 1293 8.77 1294 8.39 1295 9.37 1296 8.88 1297 10.11 1298 9.29 1299 9.5 1300 10.06 1301 8.68 1302 9.24 1303 8.99 1304 8.56 1305 8.45 1306 8.93 1307 8.79 1308 8.48 1309 6.88 1310 9.37 1311 8.85 1312 9.69 1313 8.58 1314 8.86 1315 9.75 1316 9.07 1317 8.3 1318 9.17 1319 8.49 1320 9.17 1321 9.01 1322 9.45 1323 8.17 1324 8.66 1325 8.97 1326 8.86 1327 9.14 1328 9.51 1329 8.57 1330 9.08 1331 9.55 1332 9.21 1333 8.82 1334 10.02 1335 9.12 1336 8.92 1337 8.87 1338 9.39 1339 7.98 1340 8.75 1341 8.02 1342 9 1343 8.99 1344 8.81 1345 9.18 1346 8.27 1347 9.16 1348 8.22 1349 8.63 1350 9.21 1351 9.49 1352 8.35 1353 8.98 1354 9.54 1355 8.83 1356 8.42 1357 8.48 1358 8.62 1359 9.17 1360 8.85 1361 8.72 1362 9.01 1363 8.58 1364 9.87 1365 9.56 1366 9.43 1367 8.74 1368 9.51 1369 9.27 1370 8.86 1371 9.67 1372 9.51 1373 8.73 1374 9.58 1375 8.75 1376 9.22 1377 8.32 1378 9.28 1379 9.9 1380 9.51 1381 9.24 1382 9.1 1383 10.27 1384 9.94 1385 9.01 1386 9.76 1387 8.93 1388 9.26 1389 9.06 1390 10.06 1391 9.8 1392 8.98 1393 9.03 1394 8.82 1395 9.09 1396 9.18 1397 9.34 1398 9.19 1399 9.05 1400 9.11 1401 9.65 1402 10 1403 9.49 1404 9.5 1405 8.96 1406 9.88 1407 9.14 1408 9.46 1409 9.73 1410 9.68 1411 9.73 1412 8.91 1413 9.63 1414 8.68 1415 9.27 1416 9.02 1417 9.02 1418 9.57 1419 8.5 1420 9.26 1421 8.41 1422 9.35 1423 8.7 1424 9.46 1425 9.73 1426 9.1 1427 9.49 1428 9.13 1429 9.56 1430 9.15 1431 9.54 1432 9.62 1433 9.46 1434 9.81 1435 9.78 1436 9.37 1437 9.34 1438 9.21 1439 9.15 1440 9.05 1441 9.51 1442 9.11 1443 8.88 1444 9.43 1445 9.23 1446 9.2 1447 9.16 1448 9.37 1449 9.87 1450 9.64 1451 9.99 1452 9.34 1453 8 1454 9.43 1455 8.85 1456 8.68 1457 8.98 1458 9.13 1459 9.2 1460 9.37 1461 8.37 1462 9.1 1463 9.03 1464 8.94 1465 9.22 1466 9.41 1467 9.17 1468 9.08 1469 9.06 1470 8.81 1471 9.18 1472 8.96 1473 8.98 1474 9.58 1475 9.29 1476 9.45 1477 9.48 1478 8.78 1479 9.39 1480 9.17 1481 9.23 1482 9.4 1483 9.47 1484 9.65 1485 10.09 1486 9.25 1487 9.23 1488 8.83 1489 9.58 1490 9.5 1491 9.29 1492 9.81 1493 9.39 1494 9.67 1495 9.32 1496 10.22 1497 8.25 1498 9.52 1499 9.63 1500 9.25 1501 9.21 1502 9.72 1503 9.57 1504 9.29 1505 9.83 1506 9.7 1507 9.07 1508 10.06 1509 9.42 1510 9.08 1511 9.48 1512 9.58 1513 9.58 1514 9.53 1515 9.7 1516 8.8 1517 9.23 1518 9.65 1519 9.62 1520 8.54 1521 9.35 1522 9.03 1523 9.41 1524 8.64 1525 8.87 1526 9.34 1527 8.92 1528 9.34 1529 8.67 1530 9.14 1531 9.3 1532 9.52 1533 9.68 1534 9.67 1535 9.57 1536 9.05 1537 9.56 1538 9.35 1539 9.55 1540 9.66 1541 9.36 1542 9.12 1543 9.44 1544 8.96 1545 9.27 1546 9.15 1547 9.18 1548 9.02 1549 9.11 1550 8.9 1551 9.2 1552 8.75 1553 9.18 1554 8.9 1555 9.15 1556 9.53 1557 9.24 1558 9.92 1559 9.7 1560 9.67 1561 9.8 1562 9.21 1563 8.93 1564 9.65 1565 9.31 1566 9.2 1567 8.88 1568 9.12 1569 9.12 1570 9.71 1571 9.56 1572 9.03 1573 9.06 1574 9.17 1575 9.55 1576 8.78 1577 8.58 1578 9.03 1579 8.17 1580 8.6 1581 9.05 1582 9.09 1583 9.07 1584 9.44 1585 9.42 1586 9.53 1587 8.28 1588 9.14 1589 8.65 1590 8.89 1591 8.52 1592 8.84 1593 8.48 1594 8.65 1595 8.22 1596 8.91 1597 8.55 1598 9.17 1599 8.94 1600 8.31 1601 7.94 1602 8.01 1603 8.39 1604 8.07 1605 8.93 1606 8.68 1607 8.89 1608 8.31 1609 8.76 1610 8.85 1611 8.97 1612 8.77 1613 9.73 1614 7.81 1615 8.59 1616 8.76 1617 9.53 1618 9.23 1619 9.04 1620 9.02 1621 9.2 1622 9.6 1623 9.17 1624 9.15 1625 9.2 1626 9.1 1627 9.17 1628 8.88 1629 9.55 1630 8.81 1631 9.57 1632 8.08 1633 8.01 1634 9.11 1635 8.23 1636 8.62 1637 8.68 1638 8.42 1639 8.44 1640 9.31 1641 8.16 1642 8.3 1643 8.44 1644 9.04 1645 8.57 1646 8.88 1647 8.22 1648 8.8 1649 9.18 1650 8.79 1651 8.89 1652 9.56 1653 8.66 1654 8.76 1655 9.84 1656 8.92 1657 9.17 1658 9.06 1659 8.75 1660 8.86 1661 8.94 1662 8.62 1663 8.68 1664 9.34 1665 9.59 1666 9.52 1667 8.33 1668 9.1 1669 9.41 1670 9.14 1671 9.27 1672 8.76 1673 8.91 1674 8.57 1675 8.39 1676 9.08 1677 8.7 1678 9.06 1679 9.23 1680 9.05 1681 9.24 1682 9.07 1683 9.26 1684 9.63 1685 8.88 1686 8.7 1687 8.5 1688 8.98 1689 9.64 1690 9.14 1691 9.5 1692 9.17 1693 9.69 1694 9.3 1695 8.27 1696 8.52 1697 8.82 1698 8.85 1699 8.6 1700 8.93 1701 8.55 1702 9.1 1703 9.68 1704 8.38 1705 8.02 1706 8.44 1707 8.82 1708 8.17 1709 8.4 1710 8.08 1711 8.71 1712 8.7 1713 8.6 1714 8.66 1715 8.95 1716 8.31 1717 8.51 1718 8.69 1719 8.69 1720 8.76 1721 8.91 1722 8.29 1723 8.77 1724 8.69 1725 8.76 1726 8.94 1727 9.1 1728 8.36 1729 8.77 1730 9.27 1731 8.6 1732 9.13 1733 8.73 1734 9.03 1735 9.33 1736 9.41 1737 8.65 1738 9.53 1739 8.71 1740 8.65 1741 8 1742 7.72 1743 8.54 1744 8.98 1745 9 1746 8.9 1747 8.81 1748 9.1 1749 9.31 1750 9.39 1751 9.13 1752 10.08 1753 9.11 1754 9.06 1755 9.14 1756 8.72 1757 9.34 1758 9.21 1759 8.78 1760 9.08 1761 9.43 1762 9.06 1763 9.22 1764 9.09 1765 8.8 1766 9.53 1767 8.83 1768 8.89 1769 8.91 1770 8.99 1771 8.85 1772 8.16 1773 9.28 1774 9.45 1775 9.61 1776 9.71 1777 9 1778 9.38 1779 9.46 1780 8.89 1781 9.07 1782 8.3 1783 8.65 1784 7.92 1785 8.43 1786 8.13 1787 8.21 1788 8.75 1789 9.06 1790 8 1791 8.52 1792 8.68 1793 8.64 1794 8.91 1795 8.74 1796 8.82 1797 9.12 1798 9.45 1799 8.56 1800 8.83 1801 8.86 1802 8.28 1803 8.89 1804 9.34 1805 8.81 1806 8.94 1807 8.75 1808 8.78 1809 9 1810 8.51 1811 8.7 1812 8.22 1813 8.99 1814 8.99 1815 8.7 1816 8.39 1817 8.61 1818 8.69 1819 9.65 1820 9.36 1821 8.15 1822 9.04 1823 9.18 1824 8.98 1825 9.21 1826 10.31 1827 9.23 1828 9.96 1829 9.53 1830 9.51 1831 10.19 1832 8.63 1833 8.73 1834 10.04 1835 9.3 1836 8.98 1837 9.38 1838 8.48 1839 8.88 1840 8.83 1841 8.52 1842 8.95 1843 8.6 1844 8.48 1845 9.3 1846 9.5 1847 9.14 1848 8.57 1849 8.62 1850 8.7 1851 8.17 1852 9.15 1853 8.6 1854 9.13 1855 9.61 1856 8.3 1857 8.95 1858 9.71 1859 8.9 1860 9.42 1861 9.29 1862 8.93 1863 8.53 1864 8.37 1865 8.54 1866 8.48 1867 8.46 1868 9.94 1869 8.3 1870 9.34 1871 8.44 1872 9.5 1873 8.87 1874 8.77 1875 9.47 1876 8.79 1877 8.49 1878 9.14 1879 9.7 1880 9.05 1881 8.16 1882 9.36 1883 9.37 1884 9.34 1885 8.37 1886 9.2 1887 9.01 1888 8.51 1889 9.31 1890 8.86 1891 8.71 1892 8.57 1893 9.09 1894 9.42 1895 9.26 1896 9.34 1897 9.64 1898 8.66 1899 8.01 1900 8.76 1901 9.92 1902 8.13 1903 8.5 1904 8.2 1905 8.04 1906 9.05 1907 8.31 1908 9.27 1909 8.22 1910 9.59 1911 8.79 1912 9.02 1913 8.84 1914 9.51 1915 8.7 1916 9.01 1917 9.4 1918 9.89 1919 9.57 1920 9.64 1921 9.25 1922 9.56 1923 8.52 1924 9.93 1925 10.27 1926 9.73 1927 9.63 1928 8.85 1929 9.03 1930 10.39 1931 8.99 1932 9.42 1933 9.88 1934 10.31 1935 8.97 1936 9.92 1937 10.66 1938 10.03 1939 10.08 1940 9.99 1941 9.6 1942 9.79 1943 10.13 1944 9.66 1945 9.83 1946 10.34 1947 10.64 1948 10.45 1949 9.51 1950 10.38 1951 10.25 1952 9.38 1953 10.06 1954 9.86 1955 10.25 1956 9.5 1957 9.63 1958 9.23 1959 10.55 1960 9.88 1961 9.3 1962 8.64 1963 9.86 1964 9.63 1965 9.53 1966 9.38 1967 9.99 1968 9.84 1969 9.76 1970 9.26 1971 8.66 1972 10.25 1973 9.87 1974 9.63 1975 10.26 1976 9.86 1977 8.97 1978 9.48 1979 9.05 1980 9.94 1981 9.38 1982 9.44 1983 9.2 1984 9.15 1985 9.29 1986 9.42 1987 8.61 1988 9.92 1989 9.9 1990 9.77 1991 9.87 1992 9.2 1993 9.24 1994 9.85 1995 9.36 1996 9.44 1997 10.27 1998 9.09 1999 9.81 2000 9.18 2001 9.32 2002 10.14 2003 10.49 2004 9.92 2005 9.57 2006 11.01 2007 10.44