# 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, # plus the Online Resource and date accessed. # # # Online_Resource: http://hurricane.ncdc.noaa.gov/pls/paleox/f?p=519:1:::::P1_STUDY_ID:13644 # # Original_Source_URL: ftp://ftp.ncdc.noaa.gov/pub/data/paleo/treering/reconstructions/europe/sweden/gunnarson2011mxd.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 # # 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: 2011-01-01 # Published_Title: Improving a tree-ring reconstruction from west-central Scandinavia: 900 years of warm-season temperatures # Journal_Name: Climate Dynamics # Volume: 36 # Issue: 1-2 # Pages: 97-108 # DOI: 10.1007/s00382-010-0783-5 # 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. # #--------------------- # Funding_Agency # Funding_Agency_Name: European Union # Grant: Millennium Project Contract No 017008 GOCE #-------------------- # 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: m #------------------ # Data_Collection # Core_Name: gunnarson2011mxd # First_Year: 1290 # Last_Year: 2006 # Time_Unit: AD # Core_Length: # Notes: #------------------ # Chronology # # # #------------------ # Variables # # Variables list, one per line, shortname-tab-9 components: material, error, units, anomaly, period, archive, detail, method, C or N for Character or Numeric data) # ## age_AD Age (AD), , ,AD, , , , ,N ## trmxdsgi-rcs Tree Ring Maximum Density Standardized Growth Index Regional Curve Standardization, , , , , , , , N ## trmxdsgi-rcs30 Tree Ring Maximum Density Standardized Growth Index Regional Curve Standardization 30 Year Spline, , , , , , , , N #------------------------ # Data: # Missing Value: age_AD trmxdsgi-rcs trmxdsgi-rcs30 1290 0.92 0.98 1291 1.01 0.98 1292 1.00 0.98 1293 0.94 0.99 1294 0.88 0.99 1295 1.03 0.99 1296 0.96 0.99 1297 1.14 0.99 1298 1.02 0.99 1299 1.05 0.99 1300 1.14 0.98 1301 0.93 0.98 1302 1.01 0.98 1303 0.97 0.97 1304 0.91 0.97 1305 0.89 0.96 1306 0.97 0.96 1307 0.94 0.96 1308 0.90 0.96 1309 0.65 0.96 1310 1.03 0.97 1311 0.95 0.97 1312 1.08 0.98 1313 0.91 0.98 1314 0.95 0.99 1315 1.09 0.99 1316 1.15 1.00 1317 0.98 1.01 1318 1.10 1.01 1319 0.90 1.01 1320 1.06 1.02 1321 1.10 1.02 1322 1.08 1.02 1323 0.88 1.02 1324 0.93 1.02 1325 1.02 1.02 1326 1.00 1.02 1327 1.09 1.02 1328 1.08 1.02 1329 0.91 1.02 1330 0.99 1.01 1331 1.10 1.01 1332 1.07 1.01 1333 0.92 1.00 1334 1.19 1.00 1335 1.05 0.99 1336 0.98 0.98 1337 0.91 0.98 1338 1.03 0.97 1339 0.78 0.96 1340 0.91 0.96 1341 0.80 0.96 1342 0.91 0.95 1343 1.03 0.95 1344 1.00 0.95 1345 1.07 0.95 1346 0.89 0.95 1347 1.06 0.95 1348 0.84 0.95 1349 0.90 0.95 1350 1.03 0.95 1351 1.06 0.95 1352 0.86 0.95 1353 0.95 0.95 1354 1.04 0.95 1355 0.91 0.95 1356 0.86 0.95 1357 0.88 0.95 1358 0.91 0.95 1359 1.01 0.96 1360 0.94 0.96 1361 0.93 0.97 1362 0.97 0.97 1363 0.91 0.97 1364 1.14 0.98 1365 1.06 0.98 1366 1.07 0.98 1367 0.94 0.98 1368 1.00 0.99 1369 0.96 0.99 1370 0.94 0.99 1371 1.04 0.99 1372 1.02 0.99 1373 0.90 0.99 1374 1.06 0.99 1375 0.91 1.00 1376 0.98 1.00 1377 0.82 1.00 1378 0.99 1.01 1379 1.09 1.01 1380 1.06 1.02 1381 1.02 1.02 1382 0.98 1.02 1383 1.15 1.03 1384 1.16 1.03 1385 0.91 1.03 1386 1.10 1.03 1387 0.97 1.03 1388 1.01 1.03 1389 1.01 1.03 1390 1.15 1.03 1391 1.15 1.03 1392 0.99 1.03 1393 0.97 1.03 1394 0.95 1.03 1395 1.01 1.02 1396 0.98 1.02 1397 0.98 1.02 1398 0.99 1.03 1399 0.95 1.03 1400 0.97 1.03 1401 1.11 1.03 1402 1.15 1.03 1403 1.07 1.03 1404 1.04 1.03 1405 0.95 1.03 1406 1.15 1.03 1407 0.96 1.03 1408 1.05 1.02 1409 1.09 1.02 1410 1.02 1.01 1411 1.11 1.01 1412 0.98 1.00 1413 1.05 1.00 1414 0.91 0.99 1415 0.98 0.98 1416 0.93 0.98 1417 0.92 0.97 1418 1.01 0.97 1419 0.84 0.97 1420 0.97 0.97 1421 0.88 0.97 1422 1.03 0.98 1423 0.89 0.98 1424 1.00 0.99 1425 1.10 0.99 1426 0.98 1.00 1427 1.02 1.00 1428 0.96 1.01 1429 1.06 1.01 1430 0.96 1.02 1431 1.02 1.03 1432 1.06 1.03 1433 1.08 1.03 1434 1.14 1.04 1435 1.12 1.04 1436 1.02 1.04 1437 1.02 1.04 1438 1.01 1.04 1439 1.04 1.04 1440 0.99 1.04 1441 1.04 1.04 1442 0.97 1.04 1443 0.95 1.04 1444 1.06 1.04 1445 1.07 1.04 1446 1.01 1.04 1447 1.03 1.04 1448 1.07 1.04 1449 1.13 1.04 1450 1.11 1.04 1451 1.17 1.03 1452 1.04 1.03 1453 0.83 1.02 1454 1.07 1.02 1455 1.04 1.01 1456 0.91 1.01 1457 0.96 1.00 1458 1.04 1.00 1459 1.02 1.00 1460 1.07 0.99 1461 0.90 0.99 1462 0.99 0.99 1463 0.98 0.98 1464 0.93 0.98 1465 0.97 0.98 1466 1.02 0.98 1467 1.02 0.98 1468 1.01 0.98 1469 0.97 0.98 1470 0.94 0.98 1471 0.99 0.99 1472 0.96 0.99 1473 0.94 0.99 1474 1.06 1.00 1475 0.97 1.00 1476 1.06 1.01 1477 1.06 1.01 1478 0.92 1.02 1479 0.98 1.03 1480 0.95 1.03 1481 1.04 1.04 1482 1.05 1.05 1483 1.11 1.05 1484 1.14 1.06 1485 1.19 1.06 1486 1.04 1.07 1487 1.01 1.07 1488 0.99 1.07 1489 1.09 1.08 1490 1.10 1.08 1491 1.09 1.08 1492 1.15 1.08 1493 1.10 1.08 1494 1.15 1.08 1495 1.05 1.07 1496 1.19 1.07 1497 0.88 1.07 1498 1.04 1.06 1499 1.08 1.06 1500 1.01 1.06 1501 1.01 1.06 1502 1.11 1.06 1503 1.02 1.06 1504 0.99 1.05 1505 1.11 1.05 1506 1.08 1.05 1507 1.00 1.05 1508 1.14 1.05 1509 1.03 1.05 1510 1.00 1.05 1511 1.08 1.05 1512 1.07 1.05 1513 1.05 1.05 1514 1.06 1.05 1515 1.13 1.05 1516 0.96 1.04 1517 1.04 1.04 1518 1.15 1.04 1519 1.10 1.04 1520 0.93 1.03 1521 1.04 1.03 1522 1.00 1.03 1523 1.06 1.03 1524 0.95 1.03 1525 0.99 1.03 1526 1.06 1.03 1527 0.96 1.03 1528 1.08 1.03 1529 0.92 1.03 1530 0.99 1.04 1531 1.00 1.04 1532 1.10 1.05 1533 1.17 1.05 1534 1.11 1.05 1535 1.09 1.05 1536 1.02 1.05 1537 1.07 1.05 1538 1.03 1.05 1539 1.10 1.05 1540 1.07 1.05 1541 1.05 1.05 1542 1.02 1.04 1543 1.08 1.04 1544 1.02 1.04 1545 1.05 1.03 1546 1.04 1.03 1547 1.01 1.03 1548 1.00 1.03 1549 1.01 1.03 1550 0.96 1.02 1551 1.03 1.03 1552 0.93 1.03 1553 1.00 1.03 1554 0.97 1.03 1555 1.01 1.03 1556 1.06 1.04 1557 1.01 1.04 1558 1.14 1.04 1559 1.13 1.04 1560 1.12 1.04 1561 1.13 1.04 1562 1.04 1.03 1563 0.98 1.03 1564 1.10 1.02 1565 1.05 1.01 1566 1.00 1.01 1567 0.94 1.00 1568 0.89 0.99 1569 0.84 0.98 1570 1.14 0.98 1571 1.12 0.97 1572 0.82 0.97 1573 1.02 0.96 1574 0.79 0.96 1575 1.06 0.95 1576 0.91 0.95 1577 0.85 0.95 1578 0.96 0.95 1579 0.83 0.95 1580 0.94 0.96 1581 0.85 0.96 1582 1.04 0.96 1583 1.00 0.96 1584 1.09 0.96 1585 1.11 0.96 1586 1.13 0.96 1587 0.85 0.96 1588 0.97 0.95 1589 0.92 0.94 1590 0.94 0.94 1591 0.88 0.93 1592 0.95 0.92 1593 0.91 0.91 1594 0.92 0.90 1595 0.79 0.89 1596 0.90 0.89 1597 0.87 0.88 1598 1.00 0.87 1599 0.90 0.87 1600 0.83 0.86 1601 0.75 0.86 1602 0.78 0.86 1603 0.81 0.86 1604 0.76 0.86 1605 0.93 0.86 1606 0.87 0.87 1607 0.93 0.87 1608 0.83 0.88 1609 0.86 0.89 1610 0.93 0.90 1611 0.95 0.91 1612 0.87 0.92 1613 1.07 0.92 1614 0.76 0.93 1615 0.87 0.94 1616 0.89 0.95 1617 1.06 0.96 1618 1.04 0.97 1619 0.99 0.98 1620 0.96 0.98 1621 1.00 0.98 1622 1.04 0.99 1623 1.02 0.99 1624 0.99 0.98 1625 1.03 0.98 1626 0.98 0.97 1627 1.04 0.97 1628 0.95 0.96 1629 1.04 0.95 1630 0.90 0.94 1631 1.04 0.92 1632 0.82 0.91 1633 0.79 0.90 1634 0.92 0.89 1635 0.81 0.88 1636 0.85 0.87 1637 0.86 0.87 1638 0.81 0.86 1639 0.83 0.86 1640 0.98 0.86 1641 0.76 0.86 1642 0.79 0.86 1643 0.82 0.86 1644 0.93 0.86 1645 0.86 0.87 1646 0.90 0.87 1647 0.77 0.88 1648 0.89 0.89 1649 0.96 0.89 1650 0.91 0.90 1651 0.90 0.91 1652 1.01 0.91 1653 0.86 0.92 1654 0.87 0.93 1655 1.11 0.93 1656 0.96 0.93 1657 0.97 0.94 1658 0.95 0.94 1659 0.88 0.94 1660 0.88 0.94 1661 0.93 0.94 1662 0.88 0.94 1663 0.89 0.95 1664 1.00 0.95 1665 1.06 0.95 1666 1.04 0.95 1667 0.80 0.95 1668 0.97 0.94 1669 1.03 0.94 1670 0.94 0.94 1671 1.01 0.94 1672 0.88 0.94 1673 0.90 0.94 1674 0.85 0.94 1675 0.85 0.94 1676 0.93 0.94 1677 0.90 0.95 1678 0.93 0.95 1679 1.00 0.95 1680 0.99 0.96 1681 0.98 0.96 1682 0.98 0.96 1683 0.98 0.97 1684 1.08 0.97 1685 0.96 0.97 1686 0.93 0.97 1687 0.88 0.97 1688 0.91 0.97 1689 1.02 0.96 1690 0.96 0.96 1691 1.04 0.96 1692 0.98 0.95 1693 1.06 0.95 1694 0.99 0.94 1695 0.86 0.94 1696 0.85 0.93 1697 0.90 0.92 1698 0.90 0.92 1699 0.87 0.91 1700 0.94 0.90 1701 0.87 0.90 1702 0.94 0.89 1703 1.03 0.89 1704 0.85 0.88 1705 0.81 0.88 1706 0.83 0.87 1707 0.89 0.87 1708 0.80 0.87 1709 0.81 0.87 1710 0.78 0.87 1711 0.88 0.87 1712 0.94 0.88 1713 0.93 0.88 1714 0.92 0.88 1715 0.99 0.89 1716 0.84 0.89 1717 0.85 0.89 1718 0.89 0.90 1719 0.90 0.90 1720 0.92 0.90 1721 0.93 0.91 1722 0.84 0.91 1723 0.90 0.92 1724 0.91 0.92 1725 0.92 0.93 1726 0.94 0.93 1727 0.98 0.94 1728 0.87 0.94 1729 0.90 0.94 1730 1.03 0.95 1731 0.95 0.95 1732 1.00 0.96 1733 0.92 0.96 1734 0.98 0.96 1735 1.02 0.96 1736 1.05 0.96 1737 0.96 0.96 1738 1.08 0.96 1739 0.95 0.96 1740 0.95 0.95 1741 0.82 0.95 1742 0.78 0.95 1743 0.87 0.96 1744 0.96 0.96 1745 0.96 0.96 1746 0.98 0.97 1747 0.93 0.97 1748 1.00 0.98 1749 1.03 0.98 1750 1.06 0.99 1751 0.98 0.99 1752 1.13 1.00 1753 1.00 1.00 1754 0.97 1.00 1755 0.99 1.00 1756 0.93 1.01 1757 1.08 1.01 1758 1.04 1.01 1759 0.95 1.01 1760 0.99 1.01 1761 1.06 1.01 1762 1.00 1.01 1763 1.00 1.01 1764 0.98 1.01 1765 0.97 1.01 1766 1.06 1.01 1767 1.00 1.01 1768 0.98 1.01 1769 0.99 1.01 1770 0.99 1.01 1771 0.95 1.01 1772 0.84 1.01 1773 1.03 1.01 1774 1.05 1.01 1775 1.11 1.01 1776 1.14 1.01 1777 1.03 1.00 1778 1.06 1.00 1779 1.08 0.99 1780 1.03 0.98 1781 1.02 0.97 1782 0.96 0.97 1783 0.94 0.96 1784 0.78 0.95 1785 0.86 0.95 1786 0.84 0.94 1787 0.88 0.94 1788 0.96 0.94 1789 1.01 0.94 1790 0.87 0.95 1791 0.93 0.95 1792 0.95 0.95 1793 0.95 0.96 1794 0.99 0.97 1795 0.95 0.97 1796 1.02 0.98 1797 1.06 0.98 1798 1.11 0.99 1799 0.96 0.99 1800 0.98 1.00 1801 1.00 1.00 1802 0.91 1.01 1803 0.94 1.01 1804 1.12 1.01 1805 1.00 1.02 1806 1.02 1.02 1807 1.05 1.02 1808 1.08 1.02 1809 1.14 1.02 1810 0.98 1.02 1811 1.02 1.02 1812 0.93 1.02 1813 1.03 1.02 1814 1.04 1.02 1815 1.00 1.02 1816 0.93 1.02 1817 0.98 1.02 1818 0.98 1.03 1819 1.17 1.03 1820 1.09 1.03 1821 0.91 1.03 1822 1.05 1.03 1823 1.04 1.04 1824 0.96 1.04 1825 0.99 1.04 1826 1.17 1.04 1827 0.98 1.04 1828 1.12 1.04 1829 1.06 1.04 1830 1.05 1.03 1831 1.16 1.03 1832 0.92 1.02 1833 0.94 1.02 1834 1.14 1.01 1835 1.02 1.00 1836 0.98 1.00 1837 1.04 0.99 1838 0.90 0.98 1839 0.96 0.98 1840 0.95 0.97 1841 0.90 0.97 1842 0.97 0.97 1843 0.92 0.96 1844 0.90 0.96 1845 1.02 0.96 1846 1.05 0.96 1847 1.00 0.96 1848 0.91 0.96 1849 0.92 0.96 1850 0.93 0.96 1851 0.85 0.96 1852 1.00 0.96 1853 0.92 0.96 1854 1.00 0.96 1855 1.07 0.96 1856 0.87 0.97 1857 0.97 0.97 1858 1.09 0.97 1859 0.96 0.97 1860 1.04 0.97 1861 1.02 0.97 1862 0.97 0.96 1863 0.91 0.96 1864 0.88 0.96 1865 0.91 0.96 1866 0.90 0.96 1867 0.90 0.96 1868 1.12 0.96 1869 0.87 0.96 1870 1.03 0.97 1871 0.90 0.97 1872 1.05 0.97 1873 0.96 0.97 1874 0.94 0.97 1875 1.05 0.97 1876 0.95 0.98 1877 0.90 0.98 1878 1.00 0.98 1879 1.08 0.98 1880 0.99 0.98 1881 0.85 0.98 1882 1.03 0.98 1883 1.03 0.98 1884 1.03 0.98 1885 0.88 0.98 1886 1.01 0.98 1887 0.98 0.98 1888 0.90 0.98 1889 1.03 0.98 1890 0.96 0.97 1891 0.93 0.97 1892 0.91 0.97 1893 0.99 0.97 1894 1.04 0.97 1895 1.02 0.97 1896 1.03 0.96 1897 1.08 0.96 1898 0.93 0.96 1899 0.83 0.95 1900 0.94 0.95 1901 1.12 0.94 1902 0.85 0.94 1903 0.90 0.94 1904 0.86 0.94 1905 0.83 0.94 1906 0.99 0.94 1907 0.87 0.95 1908 1.02 0.95 1909 0.86 0.96 1910 1.07 0.96 1911 0.95 0.97 1912 0.98 0.98 1913 0.95 0.98 1914 1.05 0.99 1915 0.93 1.00 1916 0.98 1.01 1917 1.04 1.01 1918 1.11 1.02 1919 1.07 1.03 1920 1.08 1.03 1921 1.02 1.04 1922 1.06 1.04 1923 0.91 1.05 1924 1.12 1.05 1925 1.17 1.06 1926 1.09 1.06 1927 1.07 1.06 1928 0.96 1.07 1929 0.98 1.07 1930 1.19 1.08 1931 0.98 1.08 1932 1.04 1.09 1933 1.11 1.09 1934 1.18 1.10 1935 0.97 1.10 1936 1.12 1.11 1937 1.23 1.11 1938 1.13 1.12 1939 1.14 1.12 1940 1.13 1.12 1941 1.07 1.13 1942 1.10 1.13 1943 1.15 1.13 1944 1.08 1.13 1945 1.10 1.13 1946 1.18 1.14 1947 1.23 1.14 1948 1.20 1.13 1949 1.06 1.13 1950 1.19 1.13 1951 1.17 1.13 1952 1.04 1.12 1953 1.14 1.12 1954 1.11 1.11 1955 1.17 1.11 1956 1.05 1.10 1957 1.07 1.10 1958 1.01 1.09 1959 1.21 1.09 1960 1.11 1.08 1961 1.02 1.08 1962 0.92 1.08 1963 1.11 1.07 1964 1.07 1.07 1965 1.06 1.07 1966 1.04 1.07 1967 1.13 1.07 1968 1.11 1.07 1969 1.09 1.07 1970 1.02 1.07 1971 0.93 1.07 1972 1.17 1.07 1973 1.11 1.06 1974 1.07 1.06 1975 1.17 1.06 1976 1.11 1.06 1977 0.97 1.06 1978 1.05 1.05 1979 0.99 1.05 1980 1.12 1.05 1981 1.03 1.05 1982 1.04 1.04 1983 1.01 1.04 1984 1.00 1.04 1985 1.02 1.04 1986 1.04 1.04 1987 0.92 1.04 1988 1.12 1.05 1989 1.12 1.05 1990 1.10 1.05 1991 1.11 1.05 1992 1.01 1.06 1993 1.02 1.06 1994 1.11 1.06 1995 1.03 1.07 1996 1.04 1.07 1997 1.17 1.08 1998 0.99 1.08 1999 1.10 1.09 2000 1.01 1.09 2001 1.03 1.10 2002 1.15 1.11 2003 1.20 1.12 2004 1.12 1.13 2005 1.06 1.14 2006 1.28 1.15