# Oroko Tree ring 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. # # Original_Source_URL: # # Archive: Tree Rings #-------------------- # Contribution_Date # Date: 25-08-2016 #-------------------- # Title # Study_Name: Oroko Tree ring reconstruction #-------------------- # Investigators # Investigators: Cook, E.R. #-------------------- # Description_and_Notes # Description: These are not raw data but a calibrated temperature reconstruction. File originally created 28 Feb 2013 by Raphi Neukom based on WDC template from 21 Dec 2012 using make_NOAA_files.r # File updated 9 Aug 2016 and 25 Aug 2016 by Bruce Bauer. First update shortened period of record to 781-2003 AD. # Upon further examination, the reconstructed values were an unpublished reconstruction update. The current # (25 August 2016) version of this file contains the reconstructed temperature values for 900-1999 AD, as published in Cook et al. 2002 GRL (Fig. 3). #-------------------- # Publication # Authors: Cook, Edward R., Jonathan G. Palmer, and Rosanne D. D'Arrigo # Published_Date_or_Year: 2002 # Published_Title: Evidence for a 'Medieval Warm Period' in a 1,100 year tree-ring reconstruction of past austral summer temperatures in New Zealand # Journal_Name: Geophysical Research Letters # Volume: 29 # Issue: 14 # DOI: 10.1029/2001GL014580 # Pages: # Abstract: The occurrence of the Medieval Warm Period (MWP) in the Southern Hemisphere is uncertain because of the paucity of well-dated, high-resolution paleo-temperature records covering the past 1,000 years. We describe a new tree-ring reconstruction of Austral summer temperatures from the South Island of New Zealand, covering the past 1,100 years. This record is the longest yet produced for New Zealand and shows clear evidence for persistent above-average temperatures within the interval commonly assigned to the MWP. Comparisons with selected temperature proxies from the Northern and Southern Hemispheres confirm that the MWP was highly variable in time and space. Regardless, the New Zealand temperature reconstruction supports the global occurrence of the MWP. #-------------------- # Publication # Authors: Cook, E.R.; Palmer, J.G.; Cook, B.I.; Hogg, A.; DArrigo, R.D. # Published_Date_or_Year: 2002 # Published_Title: A multi-millennial palaeoclimatic resource from Lagarostrobos colensoi tree-rings at Oroko Swamp, New Zealand # Journal_Name: Global and Planetary Change # Volume: 33 # Issue: 03. Apr # Pages: 209-220 # Abstract: We describe the first results of a new dendroclimatic study in New Zealand using Lagarostrobos colensoi (silver pine) growing at Oroko Swamp in the West Coast of the South Island. This research has produced the first millennium-length tree-ring chronology from New Zealand, covering the period AD 816-1998. Statistical analysis of the climate signal in the chronology indicates that it reflects Austral summer temperatures with a high degree of fidelity, except for the post-1957 period when a stand-wide disturbance apparently impacted the trees. Locally abundant sub-fossil wood on the swamp surface has been used to extend the present chronology back beyond the ages of the living trees. However, a large amount of material is still available, so the prospect of extending this chronology further back in time is good. A comparison of the pre-20th Century temperatures estimated using the chronology with instrumental data over the 1900-1999 period indicates a change in variability from that of the 20th century. In addition, it appears that summer temperatures estimated over the period of most reliable tree-ring data prior to the instrumental record (AD 1200-1865) were considerably more variable and persistent than those found in the "modern" record, This result has implications in detection and attribution studies of greenhouse gas forcing because it suggests that Austral summer temperatures in this sector of New Zealand have been anomalous during the 20th Century relative to earlier times. (C) 2002 Elsevier Science B.V. All rights reserved. #-------------------- # Publication # Authors: Cook, E. R.; Buckley, B. M.; Palmer, J. G.; Fenwick, P.; Peterson, M. J.; Boswijk, G.; Fowler, A. # Published_Date_or_Year: 2006 # Published_Title: Millennia-long tree-ring records from Tasmania and New Zealand: a basis for modelling climate variability and forcing, past, present and future # Journal_Name: Journal of Quaternary Science # Volume: 21 # Issue: 7 # Pages: 689-699 # Abstract: Progress in the development of millennia-long tree-ring chronologies from Australia and New Zealand is reviewed from the perspective of modelling long-term climate variability there. Three tree species have proved successful in this regard: Huon pine (Lagarostrobos franklinii) from Tasmania, silver pine (L. colensoi) from the South Island of New Zealand, and kauri (Agathis australis) from the North Island of New Zealand. Each of these species is very long-lived and produces abundant quantities of well-preserved wood for extending their tree-ring chronologies back several millennia into the past. The growth patterns on these chronologies strongly correlate with both local and regional warm-season temperature changes over significant areas of the Southern Hemisphere (especially Huon and silver pine) and to ENSO variability emanating from the equatorial Pacific region (especially kauri). In addition, there is evidence for significant, band-limited, multi-decadal and centennial timescale variability in the warm-season temperature reconstruction based on Huon pine tree rings that may be related to slowly varying changes in ocean circulation dynamics in the southern Indian Ocean. This suggests the possibility of long-term climate predictability there. Copyright (c) 2006 John Wiley & Sons, Ltd. #-------------------- # Funding_Agency #-------------------- # Site_Information # Site_Name: Oroko # Location: Australia/New Zealand>New Zealand # Region: PAGES Australasia 2k # Country: New Zealand # Northernmost_Latitude: -43.23 # Southernmost_Latitude: -43.23 # Easternmost_Longitude: 170.28 # Westernmost_Longitude: 170.28 # Elevation: 110 #-------------------- # Data_Collection # Collection_Name: Oroko Tree-ring based temperature reconstruction # Earliest_Year: 900 # Most_Recent_Year: 1999 # Time_Unit: AD # Notes: Calibrated temperature reconstruction based on Silver Pine tree ring data. #-------------------- # Species # Species Name: Lagarostrobos colensoi #-------------------- # Chronology: #-------------------- # Variables # Short_name What,Material,Error,Units, Anomaly_period,Archive,Details,Method,Data_type ## age_AD age, , ,CE, ,tree rings, ,counting,N ## Oroko_TT_Recon JFM temperature,wood,,degrees C,,tree ring,chronology,calibrated_temp_recon,N #-------------------- # Data # Missing values: NA age_AD Oroko_TT_Recon 900 14.006 901 14.6 902 13.413 903 13.427 904 13.611 905 13.85 906 13.123 907 13.855 908 13.464 909 13.063 910 13.381 911 13.878 912 14.14 913 14.398 914 13.215 915 14.273 916 13.454 917 13.956 918 13.914 919 13.956 920 14.122 921 14.108 922 14.885 923 14.549 924 14.448 925 14.986 926 14.485 927 14.605 928 14.246 929 14.568 930 15.433 931 13.983 932 15.203 933 14.816 934 15.557 935 14.848 936 15.621 937 15.695 938 15.042 939 15.249 940 15.06 941 15.447 942 14.756 943 13.997 944 14.687 945 14.402 946 14.287 947 14.871 948 15.056 949 15.41 950 14.913 951 15.157 952 15.58 953 15.327 954 15.051 955 13.993 956 13.054 957 13.786 958 13.942 959 13.753 960 14.807 961 14.513 962 14.738 963 14.439 964 15.069 965 14.848 966 14.559 967 14.655 968 14.724 969 14.052 970 14.103 971 14.549 972 13.56 973 14.103 974 14.126 975 14.407 976 15.009 977 14.319 978 15.253 979 15.778 980 14.77 981 15.336 982 14.632 983 15.824 984 13.753 985 14.338 986 14.356 987 15.792 988 15.226 989 16.229 990 14.816 991 14.623 992 15.805 993 14.637 994 14.223 995 13.661 996 14.26 997 13.891 998 13.905 999 13.809 1000 12.778 1001 13.919 1002 13.441 1003 13.542 1004 14.14 1005 13.666 1006 13.293 1007 13.036 1008 13.873 1009 14.112 1010 14.241 1011 13.684 1012 14.319 1013 13.413 1014 13.629 1015 12.778 1016 12.879 1017 13.362 1018 13.376 1019 13.091 1020 13.477 1021 13.293 1022 14.296 1023 13.625 1024 13.873 1025 14.099 1026 13.422 1027 13.381 1028 14.319 1029 13.257 1030 13.928 1031 13.928 1032 14.025 1033 13.712 1034 14.145 1035 14.375 1036 13.758 1037 14.637 1038 13.28 1039 13.606 1040 14.664 1041 14.057 1042 15.391 1043 15.134 1044 15.235 1045 14.375 1046 13.473 1047 14.209 1048 14.296 1049 13.638 1050 13.625 1051 13.303 1052 14.269 1053 13.947 1054 13.845 1055 13.965 1056 13.036 1057 13.629 1058 13.868 1059 13.776 1060 14.177 1061 14.416 1062 15.102 1063 14.122 1064 14.425 1065 14.595 1066 14.802 1067 14.471 1068 13.97 1069 14.444 1070 14.6 1071 14.982 1072 14.347 1073 14.513 1074 14.439 1075 14.462 1076 14.052 1077 14.278 1078 13.965 1079 13.891 1080 14.968 1081 14.177 1082 13.933 1083 14.099 1084 13.951 1085 15.295 1086 13.896 1087 13.293 1088 13.132 1089 13.418 1090 14.301 1091 14.945 1092 14.94 1093 14.296 1094 15.161 1095 14.936 1096 15.088 1097 14.968 1098 15.184 1099 15.272 1100 15.253 1101 16.063 1102 15.24 1103 15.525 1104 14.637 1105 14.867 1106 14.283 1107 15.184 1108 13.74 1109 13.781 1110 13.694 1111 14.112 1112 14.508 1113 14.14 1114 14.996 1115 14.724 1116 14.48 1117 14.342 1118 14.991 1119 15.217 1120 13.997 1121 13.27 1122 14.365 1123 14.789 1124 15.212 1125 15.221 1126 14.945 1127 14.802 1128 14.646 1129 14.968 1130 14.858 1131 14.375 1132 14.798 1133 15.12 1134 13.882 1135 14.094 1136 14.066 1137 15.065 1138 14.89 1139 15.281 1140 15.102 1141 14.77 1142 15.272 1143 15.194 1144 15.06 1145 14.453 1146 15.194 1147 15.327 1148 15.125 1149 15.203 1150 14.549 1151 15.221 1152 15.598 1153 15.773 1154 16.611 1155 15.787 1156 15.428 1157 15.957 1158 15.479 1159 14.444 1160 15.649 1161 15.562 1162 15.24 1163 15.019 1164 15.134 1165 14.835 1166 14.715 1167 15.157 1168 14.71 1169 14.812 1170 15.437 1171 15.529 1172 15.069 1173 15.373 1174 15.111 1175 15.672 1176 14.747 1177 15.355 1178 14.163 1179 14.526 1180 14.885 1181 14.048 1182 14.72 1183 14.931 1184 14.623 1185 14.338 1186 15.267 1187 14.591 1188 15.575 1189 14.996 1190 15.12 1191 14.503 1192 14.913 1193 15.382 1194 14.43 1195 14.715 1196 15.746 1197 14.563 1198 15.088 1199 14.453 1200 14.02 1201 14.729 1202 14.899 1203 15.299 1204 13.671 1205 14.066 1206 14.724 1207 14.885 1208 14.522 1209 15.235 1210 14.715 1211 14.996 1212 15.175 1213 14.835 1214 15.566 1215 15.428 1216 14.908 1217 15.037 1218 14.108 1219 15.511 1220 15.157 1221 15.833 1222 15.47 1223 16.045 1224 15.566 1225 15.585 1226 14.591 1227 15.405 1228 15.93 1229 14.48 1230 14.402 1231 15.396 1232 14.963 1233 15.341 1234 15.046 1235 15.175 1236 15.663 1237 15.87 1238 14.085 1239 14.563 1240 15.58 1241 15.152 1242 15.552 1243 15.258 1244 16.123 1245 16.56 1246 15.525 1247 15.64 1248 16.749 1249 15.35 1250 14.582 1251 15.102 1252 15.92 1253 15.447 1254 15.355 1255 14.89 1256 14.761 1257 14.485 1258 14.651 1259 15.332 1260 15.138 1261 14.375 1262 14.052 1263 14.204 1264 14.651 1265 14.977 1266 14.844 1267 15.032 1268 14.72 1269 15.037 1270 14.485 1271 14.729 1272 14.798 1273 14.931 1274 15.534 1275 15.603 1276 14.692 1277 14.692 1278 15.088 1279 14.595 1280 14.733 1281 13.689 1282 15.106 1283 14.287 1284 14.333 1285 13.832 1286 15.709 1287 15.424 1288 15.207 1289 15.019 1290 15.861 1291 15.447 1292 14.421 1293 14.876 1294 13.763 1295 14.398 1296 15.088 1297 14.761 1298 15.695 1299 13.919 1300 14.77 1301 14.821 1302 14.333 1303 14.72 1304 14.756 1305 13.496 1306 13.933 1307 13.836 1308 14.789 1309 14.08 1310 13.459 1311 13.418 1312 14.333 1313 15.125 1314 14.503 1315 15.097 1316 14.379 1317 14.54 1318 14.117 1319 14.549 1320 14.959 1321 14.871 1322 14.651 1323 14.812 1324 13.873 1325 13.675 1326 14.462 1327 14.209 1328 14.522 1329 15.134 1330 14.71 1331 15.092 1332 13.845 1333 14.352 1334 14.752 1335 14.789 1336 15.663 1337 14.623 1338 14.687 1339 15.175 1340 15.631 1341 14.66 1342 15.874 1343 15.442 1344 15.29 1345 15.419 1346 15.506 1347 15.516 1348 15.879 1349 15.009 1350 14.812 1351 14.798 1352 14.241 1353 14.729 1354 15.598 1355 14.522 1356 14.816 1357 15.267 1358 15.042 1359 14.931 1360 14.319 1361 15.042 1362 14.729 1363 15.355 1364 14.025 1365 14.936 1366 13.381 1367 13.5 1368 14.08 1369 14.439 1370 13.638 1371 14.881 1372 14.49 1373 14.48 1374 14.232 1375 14.563 1376 15.552 1377 15.079 1378 14.448 1379 14.871 1380 14.034 1381 13.947 1382 14.388 1383 14.467 1384 14.195 1385 14.858 1386 14.283 1387 14.71 1388 13.937 1389 14.264 1390 14.168 1391 13.845 1392 14.632 1393 14.761 1394 15.925 1395 16.505 1396 16.532 1397 15.525 1398 16.206 1399 15.589 1400 14.361 1401 14.729 1402 14.876 1403 14.6 1404 15.166 1405 15.424 1406 13.937 1407 14.029 1408 13.919 1409 14.614 1410 14.591 1411 14.678 1412 14.043 1413 15.778 1414 13.965 1415 13.901 1416 13.891 1417 14.559 1418 14.609 1419 14.701 1420 14.568 1421 14.434 1422 13.707 1423 14.48 1424 13.344 1425 13.896 1426 14.614 1427 14.425 1428 14.586 1429 15.157 1430 14.904 1431 14.08 1432 14.545 1433 14.95 1434 15.161 1435 15.41 1436 15.884 1437 15.962 1438 15.47 1439 15.424 1440 15.244 1441 15.428 1442 14.738 1443 15.276 1444 15.575 1445 14.655 1446 14.963 1447 15.18 1448 14.582 1449 15.879 1450 14.641 1451 14.434 1452 14.927 1453 14.172 1454 14.453 1455 14.264 1456 14.411 1457 13.629 1458 14.034 1459 14.775 1460 14.563 1461 14.016 1462 14.66 1463 13.873 1464 14.743 1465 14.595 1466 15.097 1467 14.154 1468 14.559 1469 14.867 1470 14.209 1471 14.605 1472 14.816 1473 14.315 1474 14.425 1475 14.154 1476 15.336 1477 14.871 1478 15.143 1479 15.382 1480 15.506 1481 15.539 1482 14.554 1483 14.894 1484 14.605 1485 15.065 1486 14.655 1487 15.548 1488 15.373 1489 15.226 1490 15.152 1491 15.585 1492 15.281 1493 15.92 1494 16.197 1495 14.867 1496 15.801 1497 14.807 1498 15.566 1499 16.022 1500 15.718 1501 15.723 1502 16.302 1503 15.023 1504 15.368 1505 15.074 1506 15.341 1507 15.479 1508 14.352 1509 15.626 1510 14.729 1511 15.198 1512 15.534 1513 14.559 1514 14.425 1515 13.464 1516 14.094 1517 14.131 1518 13.56 1519 13.648 1520 13.321 1521 13.786 1522 13.845 1523 13.855 1524 14.103 1525 13.905 1526 13.247 1527 13.634 1528 14.862 1529 14.163 1530 14.029 1531 14.513 1532 13.813 1533 14.365 1534 13.947 1535 13.983 1536 13.629 1537 14.416 1538 14.011 1539 14.154 1540 14.301 1541 14.296 1542 13.983 1543 14.103 1544 14.531 1545 14.715 1546 15.226 1547 15.727 1548 15.686 1549 14.605 1550 15.327 1551 15.102 1552 14.871 1553 15.286 1554 14.195 1555 14.048 1556 14.503 1557 14.494 1558 15.129 1559 14.614 1560 14.531 1561 15.056 1562 14.352 1563 14.802 1564 13.62 1565 13.91 1566 15.483 1567 14.848 1568 13.574 1569 13.979 1570 14.968 1571 15.143 1572 15.152 1573 16.206 1574 14.853 1575 14.908 1576 15.488 1577 15.12 1578 14.913 1579 15.575 1580 15.152 1581 15.157 1582 15.115 1583 14.448 1584 14.048 1585 14.191 1586 14.54 1587 14.72 1588 14.26 1589 14.043 1590 13.942 1591 13.487 1592 14.034 1593 14.246 1594 14.255 1595 14.563 1596 14.333 1597 13.855 1598 14.071 1599 14.126 1600 14.733 1601 13.96 1602 13.901 1603 13.979 1604 14.628 1605 13.859 1606 15.304 1607 14.278 1608 15.152 1609 15.023 1610 14.457 1611 15.833 1612 14.536 1613 14.283 1614 14.568 1615 13.303 1616 14.356 1617 13.744 1618 14.715 1619 14.816 1620 14.02 1621 14.029 1622 14.609 1623 13.914 1624 13.505 1625 14.283 1626 13.114 1627 13.878 1628 13.855 1629 13.767 1630 14.66 1631 14.048 1632 14.586 1633 15.695 1634 14.411 1635 14.085 1636 14.227 1637 15.382 1638 16.243 1639 14.738 1640 14.853 1641 14.959 1642 14.904 1643 15.442 1644 15.787 1645 14.835 1646 14.278 1647 14.48 1648 14.908 1649 13.97 1650 14.287 1651 13.781 1652 14.973 1653 14.913 1654 15.368 1655 15.106 1656 14.885 1657 14.775 1658 14.618 1659 14.609 1660 14.052 1661 13.717 1662 14.085 1663 14.301 1664 14.191 1665 13.79 1666 14.283 1667 14.614 1668 13.772 1669 14.646 1670 14.237 1671 14.779 1672 15.171 1673 15.741 1674 14.835 1675 16.086 1676 14.94 1677 14.908 1678 15.447 1679 14.927 1680 14.094 1681 14.503 1682 15.281 1683 15.608 1684 15.502 1685 15.221 1686 15.437 1687 15.405 1688 14.724 1689 14.715 1690 14.674 1691 14.871 1692 13.905 1693 14.503 1694 15.019 1695 14.384 1696 15.051 1697 15.309 1698 15.631 1699 15.203 1700 14.747 1701 14.586 1702 15.286 1703 15.079 1704 15.111 1705 15.166 1706 14.724 1707 15.419 1708 14.154 1709 13.675 1710 14.204 1711 14.715 1712 15.465 1713 15.359 1714 14.499 1715 15.111 1716 14.577 1717 15.171 1718 14.664 1719 13.96 1720 15.074 1721 15.773 1722 15.7 1723 14.982 1724 15.364 1725 15.069 1726 14.646 1727 14.31 1728 14.798 1729 14.954 1730 13.675 1731 15.028 1732 13.974 1733 13.698 1734 14.043 1735 13.947 1736 14.807 1737 14.793 1738 14.324 1739 14.338 1740 14.683 1741 14.77 1742 14.269 1743 14.227 1744 14.034 1745 14.071 1746 15.189 1747 15.405 1748 15.405 1749 15.805 1750 15.226 1751 14.618 1752 15.263 1753 15.704 1754 15.143 1755 14.747 1756 15.299 1757 15.051 1758 15.184 1759 14.729 1760 14.618 1761 14.858 1762 15.194 1763 15.474 1764 14.637 1765 15.161 1766 14.568 1767 15.111 1768 14.338 1769 14.112 1770 14.264 1771 14.154 1772 14.674 1773 14.329 1774 14.664 1775 14.319 1776 14.536 1777 14.094 1778 15.005 1779 14.835 1780 15.148 1781 14.867 1782 14.14 1783 13.767 1784 14.517 1785 14.08 1786 14.789 1787 15.433 1788 15.281 1789 14.347 1790 14.922 1791 14.237 1792 14.227 1793 14.825 1794 15.608 1795 15.023 1796 14.48 1797 14.954 1798 14.052 1799 13.5 1800 14.163 1801 15.184 1802 15.286 1803 15.713 1804 14.986 1805 15.221 1806 16.224 1807 13.344 1808 14.444 1809 14.706 1810 14.577 1811 15.769 1812 16.054 1813 16.371 1814 16.049 1815 16.266 1816 15.934 1817 16.206 1818 15.194 1819 15.562 1820 15.313 1821 15.488 1822 14.825 1823 15.299 1824 15.032 1825 15.175 1826 15.943 1827 14.08 1828 14.471 1829 14.269 1830 14.563 1831 14.407 1832 15.143 1833 13.546 1834 14.112 1835 15.24 1836 14.738 1837 14.462 1838 14.945 1839 14.499 1840 15.175 1841 14.342 1842 14.784 1843 14.361 1844 14.77 1845 15.028 1846 14.701 1847 14.945 1848 15.102 1849 14.798 1850 14.894 1851 14.825 1852 14.568 1853 14.54 1854 15.194 1855 14.862 1856 15.272 1857 14.476 1858 14.761 1859 14.586 1860 14.471 1861 14.871 1862 14.338 1863 14.54 1864 14.025 1865 15.327 1866 14.536 1867 15.47 1868 14.517 1869 15.175 1870 15.088 1871 15.52 1872 15.051 1873 14.954 1874 14.71 1875 14.963 1876 15.065 1877 14.476 1878 14.434 1879 13.574 1880 15.451 1881 15.203 1882 15.281 1883 15.364 1884 14.407 1885 15.106 1886 15.447 1887 15.258 1888 14.232 1889 15.083 1890 15.566 1891 14.807 1892 15.838 1893 14.894 1894 15.525 1895 15.244 1896 13.878 1897 14.6 1898 13.997 1899 14.416 1900 15.318 1901 15.787 1902 14.931 1903 15.272 1904 16.008 1905 15.281 1906 14.338 1907 14.982 1908 15.12 1909 15.552 1910 15.7 1911 15.304 1912 13.698 1913 14.416 1914 15.442 1915 14.798 1916 16.063 1917 14.881 1918 14.545 1919 14.131 1920 14.149 1921 14.729 1922 15.401 1923 14.646 1924 15.925 1925 15.037 1926 14.89 1927 15.309 1928 16.496 1929 14.609 1930 14.623 1931 14.168 1932 14.531 1933 15.442 1934 14.816 1935 15.106 1936 14.218 1937 13.482 1938 14.697 1939 13.96 1940 13.951 1941 14.752 1942 14.605 1943 14.411 1944 15.203 1945 14.214 1946 14.117 1947 14.145 1948 14.963 1949 14.802 1950 14.674 1951 15.143 1952 14.112 1953 14.637 1954 14.168 1955 14.517 1956 14.927 1957 14.706 1958 15.7 1959 15.4 1960 15.067 1961 15.333 1962 15.567 1963 15.1 1964 14.167 1965 15.1 1966 16.033 1967 15.033 1968 15.033 1969 14.533 1970 16.333 1971 17.233 1972 15.5 1973 14.6 1974 15.667 1975 16.9 1976 14.467 1977 14.9 1978 15.633 1979 15.033 1980 14.967 1981 15.867 1982 15.1 1983 13.733 1984 15.667 1985 15.467 1986 16.033 1987 15.333 1988 14.9 1989 16.833 1990 15.767 1991 15.1 1992 13.7 1993 13.8 1994 15.4 1995 15.3 1996 16.1 1997 15 1998 15.767 1999 17.233