Southern Manitoba Annual Precipitation Reconstruction --------------------------------------------------------------------- World Data Center for Paleoclimatology, Boulder and NOAA Paleoclimatology Program --------------------------------------------------------------------- NOTE: PLEASE CITE ORIGINAL REFERENCES WHEN USING THIS DATA!!!!! CONTRIBUTORS: S. St. George, Geological Survey of Canada, and E. Nielsen, Manitoba Geological Survey. NAME OF DATA SET: Southern Manitoba Annual Precipitation Reconstruction IGBP PAGES/WDCA CONTRIBUTION SERIES NUMBER: 2002-060 SUGGESTED DATA CITATION: St. George, S. and Nielsen, E. 2002, Southern Manitoba Annual Precipitation Reconstruction, International Tree-Ring Data Bank. IGBP PAGES/World Data Center for Paleoclimatology Data Contribution Series #2002-060. NOAA/NGDC Paleoclimatology Program, Boulder CO, USA. ORIGINAL REFERENCE: St. George, S. and Nielsen, E., 2002, Hydroclimatic change in southern Manitoba since A.D. 1409 inferred from tree rings. Quaternary Research, Volume 58, pp. 103-111, September 2002. LAST UPDATE: 9/2002 (Original receipt by WDC Paleo) GEOGRAPHIC REGION: Manitoba, Canada PERIOD OF RECORD: 1409-1998 AD DESCRIPTION: Southern Manitoba annual precipitation reconstruction at Winnipeg, based on tree ring chronologies from living, archaeological, and sub-fossil samples. Alluvial logs: Assiniboine River, Red River Historial timbers: Manitoba Historical Live trees: Bruce Park, FortDufferin, Horseshoe Lake, Hyland Park, Kildonan Park, LaBarriere Park, Marais River, Munson Park, Parker Farm, Remus Farm, Shay, St. Agathe, St. Jean Baptiste, St. Norbert Park, St. Vital Park, Winnipeg. ITRDB filenames cana176-cana194.rwl Regional chronology: cana194.crn, cana194.txt. ABSTRACT: A record of estimated annual (prior August to current July) precipitation derived from a regional bur oak (Quercus macrocarpa Michx.) tree-ring chronology indicates that southern Manitoba's hydroclimate has been relatively stable over the last 200 yr. Although this stability was interrupted briefly by pronounced wet intervals in the late 1820s and 1850s, hydroclimatic conditions since permanent Euro-Canadian settlement were much less variable and persistent than those prior to A.D. 1790. The reconstruction indicates that the Red River basin experienced extremely dry conditions between A.D. 1670 and 1775, with below normal precipitation occurring approximately two years out of three. Annual precipitation was estimated at more than two standard deviations below the mean during A.D. 1477, 1485, 1556, 1595, 1612, 1644, 1661, 1743, 1900 and 1980. Comparisons with limnological records from North Dakota and Minnesota suggest that multi-decadal fluctuations in regional hydroclimate have been remarkably coherent across the northeastern Great Plains during the last 600 yr. However, individual dry years in the Red River basin were usually associated with larger-scale drought across much of the North American interior. DATA: Reconstructed annual (August-July) precipitation at Winnipeg from A.D. 1409-1998. Year Annual precipitation (mm) Deviations from the 1961-90 mean 1409 614.5 16.1 1410 883.3 284.9 1411 747.0 148.6 1412 649.2 50.7 1413 629.7 31.2 1414 545.0 -53.4 1415 652.3 53.9 1416 737.2 138.8 1417 606.1 7.7 1418 774.5 176.0 1419 766.9 168.4 1420 591.7 -6.7 1421 665.5 67.1 1422 662.8 64.4 1423 677.9 79.4 1424 604.9 6.5 1425 675.0 76.5 1426 623.6 25.1 1427 717.3 118.9 1428 689.0 90.5 1429 580.0 -18.4 1430 474.6 -123.8 1431 599.2 0.8 1432 637.8 39.3 1433 512.4 -86.0 1434 630.8 32.4 1435 586.3 -12.1 1436 545.4 -53.0 1437 547.9 -50.5 1438 556.6 -41.8 1439 565.9 -32.5 1440 511.8 -86.6 1441 567.9 -30.5 1442 599.5 1.1 1443 604.4 5.9 1444 501.8 -96.6 1445 670.8 72.4 1446 608.3 9.8 1447 750.4 152.0 1448 489.5 -108.9 1449 496.4 -102.0 1450 532.1 -66.3 1451 619.4 21.0 1452 547.5 -50.9 1453 544.5 -53.9 1454 500.3 -98.1 1455 544.0 -54.4 1456 656.4 58.0 1457 652.8 54.4 1458 534.4 -64.0 1459 602.0 3.6 1460 632.2 33.8 1461 529.9 -68.5 1462 636.5 38.1 1463 524.6 -73.9 1464 543.9 -54.5 1465 694.4 96.0 1466 658.4 60.0 1467 542.4 -56.1 1468 546.5 -51.9 1469 635.1 36.7 1470 603.3 4.9 1471 577.0 -21.4 1472 647.4 49.0 1473 515.6 -82.8 1474 619.2 20.8 1475 627.5 29.1 1476 568.1 -30.3 1477 435.4 -163.0 1478 525.8 -72.6 1479 523.1 -75.3 1480 596.0 -2.4 1481 625.4 27.0 1482 581.7 -16.7 1483 527.3 -71.1 1484 544.8 -53.6 1485 397.6 -200.8 1486 658.4 60.0 1487 701.4 103.0 1488 656.2 57.8 1489 464.1 -134.4 1490 611.2 12.8 1491 736.0 137.6 1492 531.4 -67.0 1493 542.9 -55.5 1494 602.7 4.3 1495 613.9 15.5 1496 741.8 143.4 1497 747.0 148.6 1498 449.3 -149.1 1499 625.4 27.0 1500 638.3 39.9 1501 656.3 57.9 1502 543.0 -55.4 1503 592.8 -5.6 1504 607.3 8.9 1505 666.5 68.1 1506 536.4 -62.0 1507 607.6 9.2 1508 649.4 51.0 1509 651.5 53.1 1510 709.6 111.2 1511 460.5 -138.0 1512 484.5 -113.9 1513 567.0 -31.4 1514 677.7 79.3 1515 489.0 -109.4 1516 512.3 -86.1 1517 591.0 -7.4 1518 617.5 19.1 1519 595.6 -2.8 1520 456.0 -142.4 1521 531.2 -67.2 1522 611.1 12.7 1523 576.0 -22.4 1524 801.5 203.1 1525 623.4 24.9 1526 684.9 86.5 1527 798.3 199.9 1528 543.2 -55.2 1529 454.7 -143.7 1530 638.2 39.8 1531 556.0 -42.5 1532 560.7 -37.7 1533 592.0 -6.4 1534 597.8 -0.6 1535 758.2 159.8 1536 590.1 -8.3 1537 697.8 99.3 1538 656.1 57.6 1539 495.1 -103.3 1540 608.8 10.4 1541 596.1 -2.3 1542 518.0 -80.4 1543 594.6 -3.8 1544 667.1 68.7 1545 741.4 143.0 1546 593.8 -4.6 1547 599.2 0.8 1548 521.2 -77.2 1549 657.5 59.1 1550 639.6 41.2 1551 595.2 -3.2 1552 535.5 -62.9 1553 745.3 146.9 1554 662.1 63.6 1555 744.6 146.2 1556 409.6 -188.8 1557 598.3 -0.1 1558 618.9 20.5 1559 480.3 -118.2 1560 645.1 46.7 1561 617.9 19.5 1562 691.8 93.4 1563 627.1 28.7 1564 532.4 -66.0 1565 487.9 -110.5 1566 839.7 241.3 1567 605.1 6.7 1568 666.9 68.5 1569 683.7 85.2 1570 546.4 -52.1 1571 644.7 46.3 1572 524.8 -73.6 1573 680.0 81.6 1574 637.3 38.8 1575 588.5 -10.0 1576 485.6 -112.9 1577 574.3 -24.1 1578 526.5 -71.9 1579 706.5 108.0 1580 749.0 150.6 1581 453.9 -144.5 1582 473.0 -125.4 1583 719.2 120.7 1584 570.9 -27.6 1585 747.2 148.8 1586 752.8 154.4 1587 465.8 -132.6 1588 586.2 -12.3 1589 648.8 50.4 1590 626.0 27.6 1591 754.7 156.3 1592 719.0 120.6 1593 601.7 3.3 1594 527.4 -71.0 1595 373.7 -224.7 1596 716.4 118.0 1597 835.4 237.0 1598 612.4 14.0 1599 810.1 211.7 1600 647.1 48.7 1601 731.2 132.8 1602 752.4 154.0 1603 627.0 28.6 1604 622.6 24.2 1605 472.0 -126.4 1606 607.5 9.1 1607 701.7 103.3 1608 565.0 -33.4 1609 633.5 35.1 1610 676.5 78.0 1611 791.8 193.4 1612 440.3 -158.1 1613 578.0 -20.4 1614 710.8 112.4 1615 627.5 29.0 1616 587.8 -10.6 1617 530.3 -68.1 1618 581.1 -17.3 1619 505.8 -92.6 1620 659.6 61.1 1621 552.4 -46.0 1622 611.5 13.1 1623 544.8 -53.6 1624 544.5 -54.0 1625 749.1 150.7 1626 753.5 155.1 1627 541.4 -57.0 1628 486.3 -112.1 1629 577.5 -20.9 1630 614.2 15.8 1631 498.3 -100.2 1632 534.1 -64.3 1633 708.8 110.4 1634 643.4 45.0 1635 670.1 71.7 1636 668.3 69.9 1637 489.5 -108.9 1638 552.8 -45.6 1639 610.9 12.5 1640 679.3 80.9 1641 722.2 123.8 1642 715.7 117.3 1643 652.6 54.1 1644 431.8 -166.7 1645 504.9 -93.6 1646 665.9 67.4 1647 573.9 -24.5 1648 567.0 -31.4 1649 584.6 -13.8 1650 599.5 1.1 1651 502.4 -96.0 1652 583.4 -15.0 1653 705.4 107.0 1654 661.0 62.6 1655 682.7 84.3 1656 640.6 42.2 1657 608.2 9.8 1658 551.9 -46.5 1659 747.7 149.3 1660 711.3 112.9 1661 422.6 -175.8 1662 695.9 97.5 1663 657.8 59.4 1664 481.9 -116.5 1665 593.8 -4.6 1666 644.7 46.3 1667 660.2 61.8 1668 645.2 46.7 1669 565.1 -33.3 1670 640.9 42.4 1671 574.4 -24.1 1672 574.3 -24.1 1673 586.0 -12.4 1674 492.4 -106.0 1675 693.3 94.9 1676 633.8 35.4 1677 502.4 -96.0 1678 539.5 -58.9 1679 525.2 -73.2 1680 493.6 -104.8 1681 528.9 -69.5 1682 597.1 -1.3 1683 688.4 90.0 1684 659.9 61.5 1685 695.8 97.4 1686 542.2 -56.2 1687 576.8 -21.6 1688 515.6 -82.8 1689 535.3 -63.1 1690 606.4 8.0 1691 508.8 -89.6 1692 553.3 -45.1 1693 626.1 27.7 1694 594.6 -3.8 1695 574.0 -24.4 1696 476.0 -122.4 1697 501.3 -97.1 1698 501.6 -96.8 1699 601.3 2.8 1700 576.8 -21.6 1701 613.8 15.4 1702 520.6 -77.8 1703 624.9 26.5 1704 547.4 -51.0 1705 622.8 24.4 1706 538.8 -59.6 1707 523.1 -75.3 1708 484.8 -113.6 1709 494.5 -103.9 1710 578.2 -20.2 1711 614.8 16.4 1712 579.5 -18.9 1713 541.5 -56.9 1714 560.7 -37.7 1715 566.2 -32.2 1716 588.9 -9.5 1717 659.9 61.5 1718 491.1 -107.3 1719 586.2 -12.2 1720 675.8 77.4 1721 451.8 -146.6 1722 529.1 -69.3 1723 649.0 50.6 1724 623.6 25.1 1725 543.6 -54.8 1726 622.5 24.0 1727 709.3 110.9 1728 625.9 27.5 1729 658.3 59.8 1730 524.2 -74.3 1731 563.9 -34.6 1732 552.4 -46.1 1733 558.8 -39.6 1734 558.4 -40.0 1735 512.2 -86.2 1736 559.0 -39.4 1737 586.8 -11.6 1738 626.1 27.6 1739 591.3 -7.1 1740 522.5 -75.9 1741 535.9 -62.6 1742 629.7 31.2 1743 442.2 -156.2 1744 638.7 40.3 1745 532.9 -65.5 1746 627.8 29.4 1747 642.4 44.0 1748 572.2 -26.2 1749 543.5 -55.0 1750 514.2 -84.2 1751 581.4 -17.0 1752 593.2 -5.2 1753 607.6 9.2 1754 602.3 3.9 1755 634.9 36.5 1756 565.8 -32.6 1757 505.1 -93.3 1758 545.6 -52.9 1759 581.9 -16.5 1760 581.6 -16.8 1761 692.8 94.4 1762 626.0 27.6 1763 606.6 8.2 1764 489.5 -108.9 1765 707.2 108.8 1766 678.8 80.4 1767 534.1 -64.3 1768 463.0 -135.4 1769 538.8 -59.6 1770 484.1 -114.4 1771 531.4 -67.0 1772 653.6 55.2 1773 613.2 14.8 1774 467.3 -131.1 1775 690.4 92.0 1776 586.6 -11.8 1777 626.1 27.7 1778 649.2 50.8 1779 598.8 0.4 1780 589.7 -8.7 1781 624.4 26.0 1782 633.3 34.9 1783 490.4 -108.0 1784 748.5 150.1 1785 566.6 -31.8 1786 475.5 -122.9 1787 709.2 110.8 1788 545.9 -52.5 1789 646.2 47.8 1790 532.3 -66.1 1791 518.4 -80.1 1792 653.4 55.0 1793 525.1 -73.3 1794 632.9 34.5 1795 614.2 15.8 1796 508.2 -90.2 1797 633.4 35.0 1798 575.1 -23.3 1799 657.2 58.8 1800 549.5 -48.9 1801 641.6 43.2 1802 555.5 -42.9 1803 603.3 4.9 1804 550.5 -47.9 1805 497.6 -100.8 1806 640.8 42.4 1807 594.7 -3.7 1808 545.6 -52.8 1809 497.4 -101.0 1810 551.2 -47.3 1811 700.1 101.6 1812 696.8 98.4 1813 602.0 3.6 1814 547.0 -51.4 1815 623.9 25.5 1816 453.4 -145.0 1817 632.8 34.4 1818 571.5 -26.9 1819 474.6 -123.8 1820 539.0 -59.4 1821 598.5 0.1 1822 645.1 46.7 1823 550.6 -47.8 1824 596.8 -1.6 1825 626.6 28.1 1826 516.7 -81.7 1827 650.8 52.4 1828 717.7 119.3 1829 608.3 9.9 1830 634.1 35.7 1831 546.0 -52.4 1832 642.6 44.2 1833 655.2 56.8 1834 528.0 -70.4 1835 542.3 -56.1 1836 489.6 -108.8 1837 584.2 -14.2 1838 556.5 -41.9 1839 573.6 -24.8 1840 548.9 -49.5 1841 616.5 18.0 1842 522.4 -76.1 1843 610.4 12.0 1844 510.6 -87.8 1845 652.8 54.4 1846 560.5 -37.9 1847 562.8 -35.6 1848 592.3 -6.2 1849 633.6 35.2 1850 627.7 29.3 1851 578.8 -19.6 1852 528.3 -70.2 1853 601.5 3.1 1854 644.0 45.6 1855 626.3 27.8 1856 732.3 133.9 1857 598.0 -0.4 1858 550.0 -48.4 1859 569.5 -29.0 1860 620.8 22.4 1861 658.6 60.2 1862 564.8 -33.6 1863 493.1 -105.3 1864 496.9 -101.6 1865 603.0 4.6 1866 710.3 111.9 1867 637.2 38.8 1868 534.0 -64.4 1869 474.1 -124.3 1870 621.3 22.9 1871 609.5 11.1 1872 617.8 19.4 1873 560.3 -38.1 1874 589.7 -8.7 1875 492.6 -105.8 1876 574.1 -24.3 1877 720.4 122.0 1878 604.5 6.1 1879 616.6 18.2 1880 573.9 -24.5 1881 627.4 29.0 1882 655.8 57.4 1883 511.4 -87.0 1884 550.3 -48.1 1885 664.4 66.0 1886 487.5 -110.9 1887 543.2 -55.2 1888 623.8 25.4 1889 493.6 -104.8 1890 614.4 16.0 1891 602.2 3.7 1892 692.8 94.4 1893 635.8 37.4 1894 554.8 -43.6 1895 545.0 -53.4 1896 669.2 70.8 1897 563.3 -35.1 1898 598.3 -0.1 1899 664.1 65.7 1900 439.7 -158.7 1901 685.2 86.8 1902 671.2 72.8 1903 466.4 -132.0 1904 616.9 18.5 1905 650.0 51.6 1906 572.3 -26.1 1907 563.7 -34.7 1908 553.3 -45.1 1909 611.3 12.9 1910 517.1 -81.3 1911 605.8 7.4 1912 633.7 35.3 1913 613.8 15.4 1914 567.4 -31.0 1915 465.2 -133.2 1916 699.3 100.9 1917 513.8 -84.6 1918 591.3 -7.2 1919 641.6 43.2 1920 570.8 -27.6 1921 627.0 28.6 1922 611.8 13.4 1923 658.6 60.2 1924 512.8 -85.6 1925 638.2 39.8 1926 547.4 -51.0 1927 627.9 29.5 1928 656.1 57.7 1929 544.3 -54.1 1930 560.5 -38.0 1931 527.2 -71.2 1932 550.8 -47.6 1933 608.3 9.9 1934 602.2 3.8 1935 717.9 119.5 1936 486.3 -112.1 1937 610.5 12.1 1938 522.8 -75.6 1939 561.8 -36.6 1940 541.3 -57.1 1941 646.9 48.5 1942 629.5 31.1 1943 546.8 -51.7 1944 591.5 -6.9 1945 672.0 73.6 1946 495.0 -103.4 1947 621.0 22.6 1948 660.8 62.4 1949 551.9 -46.5 1950 703.9 105.5 1951 522.3 -76.1 1952 498.2 -100.2 1953 719.4 121.0 1954 635.0 36.6 1955 573.2 -25.2 1956 557.9 -40.5 1957 690.9 92.5 1958 530.8 -67.7 1959 545.5 -53.0 1960 527.7 -70.7 1961 524.4 -74.0 1962 621.8 23.4 1963 618.2 19.8 1964 555.7 -42.7 1965 582.4 -16.1 1966 601.9 3.5 1967 544.5 -53.9 1968 656.8 58.4 1969 666.9 68.5 1970 597.3 -1.1 1971 556.2 -42.2 1972 506.9 -91.5 1973 682.2 83.8 1974 570.9 -27.5 1975 644.2 45.7 1976 543.4 -55.0 1977 552.2 -46.2 1978 714.6 116.2 1979 629.0 30.6 1980 433.1 -165.3 1981 656.9 58.5 1982 599.5 1.1 1983 548.5 -49.9 1984 540.9 -57.5 1985 542.4 -56.0 1986 687.6 89.2 1987 596.1 -2.3 1988 497.4 -101.0 1989 615.6 17.2 1990 602.2 3.8 1991 540.8 -57.6 1992 549.7 -48.7 1993 623.6 25.2 1994 593.9 -4.5 1995 573.2 -25.3 1996 628.6 30.2 1997 617.9 19.5 1998 575.1 -23.3