Tables of SCL values. Here are lists of solar cycle extrema. solar cycle lengths. and weighted solar cycle lengths (121 and 12221 scheme). Refer to Friis-Christensen and Lassen (1991) and Lassen and Friis-Christensen (1995) and Thejll and Lassen (2001) for discussion of the methods and data given here. Note that to 1744 the solar cycle extrema are very uncertain and non-standard. Extrema are estimated for dates past the present (late 2001). References: Friis-Christensen, E., and K. Lassen, Length of the Solar Cycle: An indicator of Solar Activity Closely Associated with Climate, Science 254, 698-700, (1991) Lassen, K., and E. Friis-Christensen, Variability of the solar cycle length during the past five centuries and the apparent association with terrestrial climate, Journal of Atmospheric and Solar-Terrestrial Physics 57, 835-845 (1995). Thejll, P., and Lassen, K., Solar forcing of the Northern hemipshere land air temperature: New data, Journal of Atmospheric and Solar-Terrestrial Physics 62, 1207-1213 (2000) Solar cycle data for minima Epoch Notes L L121 L12221 Ctr Year 1500 1514 14.0 1507.00 1524 10.0 12.3 1519.00 1539 15.0 13.3 12.8 1531.50 1552 13.0 13.3 12.9 1545.50 1564 12.0 12.5 12.4 1558.00 1577 13.0 11.5 11.1 1570.50 1585 8.0 9.8 11.0 1581.00 1595 10.0 10.5 10.9 1590.00 1609 14.0 12.0 11.0 1602.00 1619 10.0 11.5 11.5 1614.00 1631 12.0 11.0 13.9 1625.00 1641 10.0 16.3 17.1 1636.00 1674 33.0 23.3 17.8 1657.50 1691 17.0 19.3 17.8 1682.50 1701 10.0 12.3 15.3 1696.00 1713 12.0 11.3 11.4 1707.00 1724 11.0 10.5 10.5 1718.50 1732 8.0 9.8 10.7 1728.00 1744 12.0 10.8 10.6 1738.00 ------------------------------------------ 1755.2 11.2 11.4 10.8 1749.60 1766.5 11.3 10.7 10.5 1760.85 1775.5 9.0 9.6 10.5 1771.00 1784.7 9.2 10.3 10.9 1780.10 1798.3 13.6 12.2 11.5 1791.50 1810.6 12.3 12.7 12.1 1804.45 1823.3 12.7 12.1 11.8 1816.95 1833.9 10.6 10.9 11.3 1828.60 1843.5 9.6 10.6 11.2 1838.70 1856.0 12.5 11.5 11.1 1849.75 1867.2 11.2 11.7 11.4 1861.60 1878.9 11.7 11.3 11.5 1873.05 1889.6 10.7 11.3 11.5 1884.25 1901.7 12.1 11.7 11.4 1895.65 1913.6 11.9 11.5 11.1 1907.65 1923.6 10.0 10.5 10.8 1918.60 1933.8 10.2 10.2 10.4 1928.70 1944.2 10.4 10.3 10.2 1939.00 1954.2 10.0 10.3 10.5 1949.20 1964.9 1 10.7 10.8 10.7 1959.55 1976.5 11.6 11.1 10.65 1970.70 1986.8 10.3 10.55 10.63 1981.65 1996.8 10.0 10.2 1991.80 2007.3 2 10.5 2002.05 Solar cycle data for maxima Epoch Notes L L121 L12221 Ctr Year 1837.2 1848.1 10.9 1842.65 1860.1 12.0 11.4 1854.10 1870.6 10.5 11.6 11.6 1865.35 1883.9 13.3 11.8 11.6 1877.25 1894.1 10.2 11.65 11.7 1889.00 1907.0 12.9 11.65 11.4 1900.55 1917.6 10.6 11.2 11.0 1912.30 1928.4 10.8 10.3 10.5 1923.00 1937.4 9.0 9.7 10.1 1932.90 1947.5 10.1 9.9 10.1 1942.45 1957.9 10.4 10.5 10.4 1952.70 1968.9 11.0 10.85 10.58 1963.40 1979.9 11.0 10.7 10.56 1974.40 1989.6 9.7 10.27 10.59 1984.75 2000.3 2 10.7 10.5 1994.95 2011.2 2 10.9 2005.75 Notes: 1 From Thejll&Lassen (2001) 2 Estimated in Thejll&Lassen (2001) ----------------end of table-----------------