Northern Hemisphere Extratropical Temperature Reconstruction ----------------------------------------------------------------------- World Data Center for Paleoclimatology, Boulder and NOAA Paleoclimatology Program ----------------------------------------------------------------------- NOTE: PLEASE CITE CONTRIBUTORS WHEN USING THIS DATA!!!!! NAME OF DATA SET: Northern Hemisphere Extratropical Temperature Reconstruction LAST UPDATE: 6/2003 (Original Receipt by WDC Paleo) CONTRIBUTOR: Jan Esper, Swiss Federal Research Institute WSL IGBP PAGES/WDCA CONTRIBUTION SERIES NUMBER: 2003-036 SUGGESTED DATA CITATION: Esper, J., et al., 2003, Northern Hemisphere Extratropical Temperature Reconstruction, IGBP PAGES/World Data Center for Paleoclimatology Data Contribution Series # 2003-036. NOAA/NGDC Paleoclimatology Program, Boulder CO, USA. ORIGINAL REFERENCE: Esper, J., E.R. Cook, and F.H. Schweingruber, 2002, Low-Frequency Signals in Long Tree-Ring Chronologies for Reconstructing Past Temperature Variability, Science, Volume 295, Number 5563, 22 March 2002. GEOGRAPHIC REGION: Northern Hemisphere PERIOD OF RECORD: 831-1992 AD DESCRIPTION: Northern Hemisphere extratropical tree ring temperature reconstruction. Presented is the Regional Curve Standardization (RCS) Chronology. The series is not scaled to any observational record (index values only). ABSTRACT: Preserving multicentennial climate variability in long tree-ring records is critically important for reconstructing the full range of temperature variability over the past 1000 years. This allows the putative "Medieval Warm Period" (MWP) to be described and to be compared with 20th-century warming in modeling and attribution studies. We demonstrate that carefully selected tree-ring chronologies from 14 sites in the Northern Hemisphere (NH) extratropics can preserve such coherent large-scale, multicentennial temperature trends if proper methods of analysis are used. In addition, we show that the average of these chronologies supports the large-scale occurrence of the MWP over the NH extratropics. DATA: Northern Hemisphere Extratropical Regional Curve Standardization (RCS) Chronology YEAR RCS_BAND(COS) 831 0.696 832 0.8 833 0.856 834 0.893 835 0.888 836 0.935 837 0.981 838 1.015 839 1.013 840 1.166 841 1.222 842 1.249 843 1.216 844 1.134 845 1.02 846 0.996 847 0.9 848 0.986 849 1.13 850 1.174 851 1.132 852 0.934 853 1.142 854 0.809 855 0.825 856 0.961 857 0.851 858 0.783 859 0.825 860 0.766 861 0.744 862 0.897 863 0.833 864 0.765 865 0.753 866 0.788 867 0.801 868 0.773 869 0.815 870 0.884 871 0.936 872 1.041 873 1.016 874 1.05 875 1.123 876 1.174 877 1.019 878 1.187 879 1.213 880 1.135 881 1.035 882 1.189 883 1.04 884 0.891 885 1.165 886 0.946 887 1.218 888 1.047 889 1.157 890 1.195 891 1.166 892 1.301 893 1.211 894 1.314 895 1.405 896 1.112 897 1.352 898 1.302 899 1.165 900 1.027 901 1.033 902 0.988 903 0.722 904 0.977 905 0.886 906 0.749 907 0.741 908 0.811 909 0.835 910 0.929 911 0.943 912 0.914 913 0.816 914 0.948 915 1.208 916 0.911 917 0.945 918 0.953 919 0.937 920 0.862 921 0.999 922 0.966 923 0.963 924 1.01 925 0.913 926 1.002 927 1.086 928 1.019 929 1.09 930 0.985 931 1.108 932 1.05 933 1.098 934 1.103 935 1.011 936 1.24 937 1.14 938 1.139 939 1.162 940 0.933 941 1.098 942 1 943 1.088 944 0.959 945 0.989 946 0.997 947 0.874 948 0.928 949 1.021 950 0.926 951 1.056 952 0.962 953 1.09 954 1.055 955 0.981 956 0.906 957 1.05 958 0.806 959 1.022 960 1.165 961 0.99 962 0.99 963 1.228 964 1.022 965 1.242 966 1.34 967 1.102 968 1.288 969 1.136 970 1.243 971 1.142 972 1.208 973 1.129 974 1.171 975 1.01 976 0.985 977 1.188 978 1.252 979 1.08 980 1.203 981 1.098 982 1.256 983 1.223 984 1.356 985 1.176 986 1.294 987 1.253 988 1.301 989 1.506 990 1.469 991 1.191 992 1.225 993 1.352 994 1.407 995 1.529 996 1.29 997 1.107 998 1.201 999 1.271 1000 1.209 1001 1.22 1002 1.025 1003 1.024 1004 1.118 1005 1.211 1006 1.157 1007 1.254 1008 1.142 1009 0.961 1010 1.067 1011 1.042 1012 1.052 1013 1.077 1014 1.14 1015 1.127 1016 1.211 1017 1.224 1018 1.183 1019 1.249 1020 1.429 1021 1.256 1022 1.237 1023 1.152 1024 1.226 1025 1.015 1026 1.208 1027 1.447 1028 1.313 1029 1.199 1030 1.316 1031 1.206 1032 1.062 1033 1.223 1034 1.162 1035 1.143 1036 1.078 1037 1.149 1038 1.132 1039 1.072 1040 1.128 1041 1.084 1042 1.034 1043 1.143 1044 1.141 1045 1.027 1046 1.075 1047 0.959 1048 1.149 1049 1.085 1050 1.138 1051 0.935 1052 1.119 1053 0.988 1054 0.895 1055 0.949 1056 0.996 1057 1.068 1058 0.943 1059 0.861 1060 0.726 1061 1.089 1062 1.061 1063 0.956 1064 1.119 1065 1.116 1066 1.184 1067 1.048 1068 0.861 1069 0.858 1070 0.892 1071 0.871 1072 0.95 1073 1.022 1074 1.081 1075 1.21 1076 1.168 1077 1.101 1078 1.207 1079 1.224 1080 1.297 1081 1.354 1082 1.195 1083 1.203 1084 1.209 1085 1.19 1086 1.079 1087 1.213 1088 1.09 1089 1.232 1090 1.203 1091 1.239 1092 1.141 1093 1.144 1094 1.318 1095 1.246 1096 0.934 1097 1.114 1098 0.905 1099 0.969 1100 1.031 1101 1.004 1102 1.073 1103 0.922 1104 1.045 1105 1.005 1106 1.087 1107 1.182 1108 1.126 1109 0.991 1110 0.937 1111 1.051 1112 1.063 1113 1.079 1114 0.928 1115 0.911 1116 1.017 1117 0.933 1118 0.885 1119 0.921 1120 0.954 1121 0.807 1122 0.819 1123 0.931 1124 0.828 1125 0.819 1126 0.835 1127 0.977 1128 1.003 1129 0.963 1130 1.017 1131 0.989 1132 0.884 1133 0.926 1134 0.906 1135 0.894 1136 0.793 1137 0.867 1138 0.873 1139 0.932 1140 0.784 1141 0.899 1142 1.074 1143 1.042 1144 1.022 1145 0.847 1146 0.907 1147 0.932 1148 0.966 1149 0.973 1150 0.936 1151 0.811 1152 0.967 1153 0.962 1154 0.896 1155 1.035 1156 1.007 1157 1.04 1158 0.964 1159 1.172 1160 1.085 1161 0.974 1162 1.034 1163 1.099 1164 1.098 1165 1.141 1166 1.047 1167 1.006 1168 1.169 1169 1.087 1170 0.981 1171 0.973 1172 1.001 1173 0.944 1174 0.973 1175 0.99 1176 0.997 1177 0.894 1178 0.905 1179 0.863 1180 0.836 1181 0.959 1182 0.876 1183 0.967 1184 0.979 1185 0.909 1186 0.861 1187 0.943 1188 1.003 1189 0.98 1190 1.036 1191 0.902 1192 0.971 1193 1.005 1194 0.883 1195 1.003 1196 0.845 1197 0.925 1198 0.908 1199 0.978 1200 0.806 1201 0.802 1202 0.923 1203 0.899 1204 0.841 1205 0.789 1206 0.698 1207 0.692 1208 0.856 1209 0.876 1210 0.742 1211 0.872 1212 0.901 1213 0.833 1214 0.896 1215 0.926 1216 0.867 1217 0.773 1218 0.827 1219 0.844 1220 0.885 1221 0.958 1222 1.001 1223 1.025 1224 1.023 1225 1.041 1226 0.954 1227 0.915 1228 0.932 1229 0.998 1230 0.809 1231 0.922 1232 0.858 1233 0.848 1234 0.795 1235 0.711 1236 0.681 1237 0.704 1238 0.738 1239 0.807 1240 0.88 1241 0.899 1242 0.873 1243 0.84 1244 0.811 1245 0.884 1246 0.849 1247 0.802 1248 0.905 1249 0.893 1250 0.882 1251 0.841 1252 0.867 1253 0.992 1254 0.799 1255 0.881 1256 0.908 1257 0.948 1258 0.802 1259 0.763 1260 0.856 1261 0.832 1262 0.898 1263 0.719 1264 0.781 1265 0.803 1266 0.82 1267 0.811 1268 0.876 1269 0.894 1270 0.806 1271 0.851 1272 0.891 1273 0.822 1274 0.877 1275 0.957 1276 0.88 1277 0.899 1278 0.883 1279 0.932 1280 0.84 1281 0.917 1282 0.867 1283 0.957 1284 0.871 1285 0.843 1286 0.878 1287 0.837 1288 0.85 1289 0.844 1290 0.84 1291 0.836 1292 0.855 1293 0.707 1294 0.74 1295 0.751 1296 0.725 1297 0.668 1298 0.78 1299 0.781 1300 0.731 1301 0.945 1302 0.856 1303 0.955 1304 0.912 1305 0.836 1306 0.893 1307 0.874 1308 0.899 1309 0.84 1310 0.95 1311 0.94 1312 0.867 1313 1.034 1314 1.012 1315 1.003 1316 0.934 1317 1.018 1318 0.95 1319 0.963 1320 0.953 1321 1.055 1322 0.999 1323 1.047 1324 1.027 1325 1.07 1326 1.114 1327 1.199 1328 1.072 1329 1.005 1330 0.974 1331 1.028 1332 0.92 1333 0.962 1334 0.914 1335 0.876 1336 0.765 1337 0.858 1338 0.806 1339 0.867 1340 0.821 1341 0.879 1342 0.864 1343 0.942 1344 0.893 1345 0.847 1346 0.785 1347 0.717 1348 0.713 1349 0.751 1350 0.7 1351 0.744 1352 0.777 1353 0.757 1354 0.769 1355 0.874 1356 0.934 1357 0.897 1358 0.882 1359 0.914 1360 0.821 1361 0.869 1362 0.955 1363 0.912 1364 0.896 1365 0.891 1366 0.907 1367 0.98 1368 0.967 1369 0.975 1370 0.926 1371 0.979 1372 0.935 1373 0.942 1374 0.954 1375 0.916 1376 1.039 1377 0.95 1378 1.031 1379 0.878 1380 0.89 1381 0.956 1382 0.969 1383 0.942 1384 0.983 1385 0.985 1386 0.918 1387 0.964 1388 1.039 1389 1.011 1390 0.965 1391 0.89 1392 0.859 1393 0.894 1394 0.931 1395 0.994 1396 0.928 1397 0.925 1398 0.955 1399 0.929 1400 0.873 1401 0.894 1402 0.884 1403 0.948 1404 0.924 1405 0.951 1406 1.055 1407 1.02 1408 0.991 1409 1.058 1410 1.002 1411 1.051 1412 0.94 1413 0.957 1414 0.894 1415 0.968 1416 0.927 1417 0.946 1418 0.929 1419 0.946 1420 0.936 1421 0.925 1422 0.945 1423 0.909 1424 1.025 1425 1.041 1426 0.951 1427 1.009 1428 1.042 1429 1.049 1430 1.04 1431 1.051 1432 1.025 1433 1.063 1434 1.135 1435 1.107 1436 1.065 1437 1.105 1438 1.071 1439 1.086 1440 1.084 1441 1.039 1442 1.042 1443 1.031 1444 1.016 1445 1.082 1446 0.947 1447 1.048 1448 0.928 1449 0.967 1450 1.02 1451 0.939 1452 0.915 1453 0.877 1454 0.867 1455 0.837 1456 0.795 1457 0.842 1458 0.763 1459 0.765 1460 0.792 1461 0.838 1462 0.765 1463 0.859 1464 0.895 1465 0.875 1466 0.799 1467 0.833 1468 0.795 1469 0.887 1470 0.894 1471 0.892 1472 0.894 1473 0.887 1474 0.969 1475 0.981 1476 1.056 1477 0.956 1478 0.979 1479 0.894 1480 0.958 1481 0.898 1482 0.947 1483 0.936 1484 0.906 1485 0.971 1486 0.984 1487 0.977 1488 0.979 1489 1.097 1490 1.088 1491 0.992 1492 0.997 1493 0.976 1494 0.919 1495 0.942 1496 1 1497 1 1498 0.922 1499 0.988 1500 1.02 1501 1.059 1502 1.027 1503 1.011 1504 1.086 1505 1.081 1506 1.046 1507 1.106 1508 1.056 1509 1.046 1510 1.177 1511 1.064 1512 1.14 1513 1.078 1514 1.044 1515 1.004 1516 0.994 1517 1.019 1518 0.922 1519 1.055 1520 1.046 1521 1.07 1522 1.083 1523 0.958 1524 1.067 1525 1.072 1526 1.085 1527 1.134 1528 1.055 1529 0.931 1530 1.009 1531 0.976 1532 0.964 1533 0.971 1534 1.003 1535 1.114 1536 1.106 1537 1.185 1538 1.099 1539 1.157 1540 1.111 1541 1.02 1542 1.099 1543 0.977 1544 1.018 1545 1.064 1546 1.028 1547 1.068 1548 1.082 1549 1.036 1550 1.026 1551 1.038 1552 1.052 1553 1.096 1554 0.997 1555 0.997 1556 1.039 1557 1.096 1558 1.048 1559 1.101 1560 1.114 1561 1.08 1562 1.127 1563 1.13 1564 1.184 1565 1.197 1566 1.159 1567 1.169 1568 1.102 1569 1.112 1570 1.086 1571 0.98 1572 1.016 1573 1.016 1574 1.001 1575 1.118 1576 0.947 1577 1.049 1578 0.938 1579 0.851 1580 0.889 1581 0.897 1582 0.931 1583 1.021 1584 0.947 1585 0.895 1586 1.005 1587 0.957 1588 0.943 1589 0.866 1590 0.897 1591 0.835 1592 0.9 1593 0.873 1594 0.981 1595 0.907 1596 0.867 1597 0.905 1598 0.948 1599 0.989 1600 0.939 1601 0.745 1602 0.745 1603 0.857 1604 0.922 1605 0.82 1606 0.798 1607 0.828 1608 0.782 1609 0.766 1610 0.772 1611 0.84 1612 0.809 1613 0.784 1614 0.84 1615 0.815 1616 0.887 1617 0.872 1618 0.744 1619 0.794 1620 0.8 1621 0.845 1622 0.735 1623 0.82 1624 0.806 1625 0.89 1626 0.863 1627 0.862 1628 0.795 1629 0.887 1630 0.848 1631 0.8 1632 0.828 1633 0.813 1634 0.828 1635 0.838 1636 0.854 1637 0.921 1638 0.863 1639 0.884 1640 0.995 1641 0.797 1642 0.723 1643 0.774 1644 0.692 1645 0.813 1646 0.836 1647 0.766 1648 0.877 1649 0.853 1650 0.904 1651 0.928 1652 0.877 1653 0.835 1654 0.832 1655 0.914 1656 0.972 1657 0.917 1658 0.975 1659 0.973 1660 1.03 1661 1.036 1662 0.995 1663 0.924 1664 1.079 1665 1.025 1666 1.027 1667 0.934 1668 1.005 1669 0.98 1670 0.9 1671 0.972 1672 1.031 1673 1.003 1674 0.915 1675 0.889 1676 0.875 1677 0.85 1678 0.918 1679 0.892 1680 0.916 1681 0.822 1682 0.921 1683 1.043 1684 0.952 1685 0.935 1686 0.982 1687 0.999 1688 0.997 1689 1.029 1690 0.988 1691 1.051 1692 1.023 1693 1.106 1694 1.087 1695 1.066 1696 0.963 1697 1.01 1698 0.953 1699 0.794 1700 0.858 1701 0.842 1702 0.926 1703 0.889 1704 0.924 1705 0.841 1706 0.872 1707 1.02 1708 0.985 1709 0.96 1710 0.882 1711 0.898 1712 0.944 1713 1.002 1714 0.922 1715 1.002 1716 0.974 1717 0.992 1718 0.969 1719 0.971 1720 0.951 1721 0.949 1722 1.027 1723 0.91 1724 1.061 1725 1.093 1726 0.99 1727 1.129 1728 0.994 1729 1.053 1730 1.041 1731 0.985 1732 1.023 1733 0.947 1734 1.034 1735 0.953 1736 0.945 1737 0.965 1738 0.997 1739 0.964 1740 0.905 1741 0.907 1742 0.919 1743 0.937 1744 0.946 1745 0.94 1746 0.94 1747 1.01 1748 0.977 1749 0.923 1750 0.96 1751 0.97 1752 0.993 1753 0.959 1754 1.01 1755 0.949 1756 1.01 1757 1.092 1758 1.02 1759 1 1760 0.997 1761 1.057 1762 1.057 1763 1.08 1764 0.95 1765 1.018 1766 1.077 1767 1.072 1768 0.984 1769 1.006 1770 0.933 1771 0.994 1772 1.036 1773 1.013 1774 1.047 1775 1.104 1776 0.992 1777 1.073 1778 1.079 1779 1.022 1780 1.016 1781 1.067 1782 0.997 1783 0.931 1784 1.092 1785 1.061 1786 1.085 1787 1.049 1788 0.944 1789 1.008 1790 0.982 1791 1.004 1792 0.964 1793 0.971 1794 1.052 1795 1.018 1796 1.029 1797 1.02 1798 1.075 1799 1.07 1800 0.945 1801 1.125 1802 1.057 1803 1.006 1804 1.074 1805 1.045 1806 1.013 1807 1.003 1808 1.04 1809 1.012 1810 0.888 1811 0.953 1812 0.811 1813 0.879 1814 0.854 1815 0.83 1816 0.761 1817 0.884 1818 0.8 1819 0.817 1820 0.815 1821 0.773 1822 0.833 1823 0.944 1824 0.872 1825 0.909 1826 1.041 1827 1.022 1828 0.988 1829 1.02 1830 0.948 1831 1 1832 1.028 1833 0.942 1834 1.03 1835 0.99 1836 0.937 1837 0.854 1838 0.841 1839 0.938 1840 0.942 1841 0.882 1842 0.983 1843 0.888 1844 0.948 1845 0.95 1846 1.065 1847 0.96 1848 1.081 1849 0.984 1850 0.994 1851 0.988 1852 1.097 1853 1.047 1854 1.062 1855 1.026 1856 1.048 1857 0.975 1858 1.043 1859 1.024 1860 1.087 1861 1.178 1862 1.07 1863 1.035 1864 1.027 1865 1.027 1866 1.094 1867 1.038 1868 1.073 1869 0.93 1870 1.04 1871 1.033 1872 1.001 1873 0.942 1874 0.956 1875 0.95 1876 1.009 1877 1.038 1878 1.012 1879 1.039 1880 1.094 1881 1.044 1882 1.091 1883 1.083 1884 1.013 1885 0.936 1886 1.05 1887 0.986 1888 0.963 1889 0.974 1890 0.983 1891 1.092 1892 1.067 1893 0.978 1894 1.055 1895 1.08 1896 1.15 1897 1.183 1898 1.091 1899 1.01 1900 1.071 1901 1.155 1902 1.119 1903 1.022 1904 1.099 1905 1.037 1906 1.13 1907 1.052 1908 1.156 1909 1.194 1910 1.131 1911 1.131 1912 1.021 1913 0.952 1914 1.035 1915 1.132 1916 1.035 1917 1.055 1918 1.094 1919 1.13 1920 1.093 1921 1.122 1922 1.214 1923 1.196 1924 1.144 1925 1.118 1926 1.102 1927 1.199 1928 1.187 1929 1.087 1930 1.178 1931 1.126 1932 1.2 1933 1.157 1934 1.164 1935 1.271 1936 1.255 1937 1.301 1938 1.323 1939 1.147 1940 1.184 1941 1.162 1942 1.224 1943 1.187 1944 1.202 1945 1.253 1946 1.259 1947 1.146 1948 1.324 1949 1.112 1950 1.333 1951 1.196 1952 1.231 1953 1.299 1954 1.229 1955 1.303 1956 1.294 1957 1.292 1958 1.338 1959 1.327 1960 1.248 1961 1.198 1962 1.207 1963 1.212 1964 1.232 1965 1.199 1966 1.154 1967 1.33 1968 1.175 1969 1.315 1970 1.178 1971 1.021 1972 1.082 1973 1.152 1974 1.136 1975 1.169 1976 1.209 1977 1.268 1978 1.212 1979 1.195 1980 1.217 1981 1.216 1982 1.265 1983 1.264 1984 1.332 1985 1.271 1986 1.265 1987 1.167 1988 1.215 1989 1.237 1990 1.317 1991 1.215 1992 1.263