Solar total irradiance from Lean et al. 1995 (Fig. 2a) Year Solar total irradiance 1600.5 -99 1601.5 -99 1602.5 -99 1603.5 -99 1604.5 -99 1605.5 -99 1606.5 -99 1607.5 -99 1608.5 -99 1609.5 -99 1610.5 1365.7112 1611.5 1365.7913 1612.5 1366.0175 1613.5 1365.9847 1614.5 -99 1615.5 1366.0502 1616.5 1365.5328 1617.5 1365.3343 1618.5 1365.255 1619.5 1365.2777 1620.5 1365.1997 1621.5 1365.1232 1622.5 1365.0509 1623.5 1364.9859 1624.5 1364.8926 1625.5 1365.1032 1626.5 1364.9599 1627.5 1364.8808 1628.5 1364.9543 1629.5 1364.9591 1630.5 -99 1631.5 1364.9674 1632.5 1365.0019 1633.5 1365.2942 1634.5 1365.2059 1635.5 1365.3001 1636.5 -99 1637.5 -99 1638.5 1365.819 1639.5 1365.8728 1640.5 1365.3591 1641.5 -99 1642.5 1365.4563 1643.5 1365.1245 1644.5 1364.9603 1645.5 1364.7465 1646.5 1364.6211 1647.5 1364.4993 1648.5 1364.3861 1649.5 1364.2865 1650.5 1364.2062 1651.5 1364.2055 1652.5 1364.2357 1653.5 1364.2102 1654.5 1364.2087 1655.5 1364.2065 1656.5 1364.2019 1657.5 1364.2019 1658.5 1364.2004 1659.5 1364.1997 1660.5 1364.2152 1661.5 1364.213 1662.5 1364.2165 1663.5 1364.2231 1664.5 1364.2264 1665.5 1364.2272 1666.5 1364.226 1667.5 1364.2233 1668.5 1364.2195 1669.5 1364.2151 1670.5 1364.2104 1671.5 1364.2128 1672.5 1364.2049 1673.5 1364.1987 1674.5 1364.1983 1675.5 1364.1957 1676.5 1364.2132 1677.5 1364.1986 1678.5 1364.1978 1679.5 1364.1971 1680.5 1364.2044 1681.5 1364.1992 1682.5 1364.2 1683.5 1364.2005 1684.5 1364.2138 1685.5 1364.2001 1686.5 1364.2036 1687.5 1364.1974 1688.5 1364.2004 1689.5 1364.1993 1690.5 1364.1923 1691.5 1364.1911 1692.5 1364.1903 1693.5 1364.1903 1694.5 1364.1912 1695.5 1364.194 1696.5 1364.1964 1697.5 1364.2003 1698.5 1364.2051 1699.5 1364.2107 1700.5 1364.2209 1701.5 1364.2318 1702.5 1364.2389 1703.5 1364.2616 1704.5 1364.2891 1705.5 1364.3099 1706.5 1364.3 1707.5 1364.3286 1708.5 1364.3204 1709.5 1364.3289 1710.5 1364.3366 1711.5 1364.3511 1712.5 1364.3712 1713.5 1364.3956 1714.5 1364.4216 1715.5 1364.4735 1716.5 1364.548 1717.5 1364.6587 1718.5 1364.6392 1719.5 1364.7652 1720.5 1364.7553 1721.5 1364.832 1722.5 1364.8285 1723.5 1364.8235 1724.5 1364.9498 1725.5 1364.9825 1726.5 1365.228 1727.5 1365.2114 1728.5 1365.3204 1729.5 1365.1486 1730.5 1365.5666 1731.5 -99 1732.5 1365.1511 1733.5 1365.0531 1734.5 1365.0552 1735.5 1365.2082 1736.5 1365.4907 1737.5 1365.2321 1738.5 1365.1814 1739.5 1365.538 1740.5 -99 1741.5 1365.6563 1742.5 1365.4632 1743.5 1365.466 1744.5 -99 1745.5 -99 1746.5 1365.5524 1747.5 -99 1748.5 1366.5131 1749.5 1366.2513 1750.5 1366.2868 1751.5 1366.0362 1752.5 1365.9468 1753.5 1365.8269 1754.5 1365.679 1755.5 1365.5999 1756.5 1365.573 1757.5 1365.6547 1758.5 1365.7453 1759.5 1365.8192 1760.5 1365.7565 1761.5 1365.857 1762.5 1365.7772 1763.5 1365.7036 1764.5 1365.6824 1765.5 1365.5719 1766.5 1365.5847 1767.5 1365.8602 1768.5 1366.1301 1769.5 1366.3445 1770.5 1366.3838 1771.5 1366.3062 1772.5 1366.2242 1773.5 1366.0195 1774.5 1365.976 1775.5 1365.8232 1776.5 1365.8978 1777.5 1366.0672 1778.5 1366.4796 1779.5 1366.4437 1780.5 1366.2016 1781.5 1366.331 1782.5 1366.0422 1783.5 1365.957 1784.5 1365.8415 1785.5 1365.9636 1786.5 1366.4103 1787.5 1366.6607 1788.5 1366.6225 1789.5 1366.5939 1790.5 1366.4756 1791.5 1366.2624 1792.5 1366.2194 1793.5 1366.0312 1794.5 1365.9765 1795.5 1365.783 1796.5 1365.6801 1797.5 1365.5353 1798.5 1365.4136 1799.5 1365.3227 1800.5 1365.3017 1801.5 1365.5357 1802.5 1365.3426 1803.5 1365.068 1804.5 1365.026 1805.5 1364.9907 1806.5 1364.8004 1807.5 1364.709 1808.5 1364.6664 1809.5 1364.623 1810.5 1364.595 1811.5 1364.5864 1812.5 1364.6153 1813.5 1364.6402 1814.5 1364.6487 1815.5 1364.6964 1816.5 1364.8557 1817.5 1364.8572 1818.5 1364.8376 1819.5 1364.8506 1820.5 1364.8128 1821.5 1364.8119 1822.5 1364.8462 1823.5 1364.8818 1824.5 1364.9686 1825.5 1365.1047 1826.5 1365.2742 1827.5 1365.4579 1828.5 1365.631 1829.5 1365.7284 1830.5 1365.8503 1831.5 1365.761 1832.5 1365.7187 1833.5 1365.6883 1834.5 1365.8063 1835.5 1366.1567 1836.5 1366.624 1837.5 1366.7331 1838.5 1366.549 1839.5 1366.4847 1840.5 1366.3706 1841.5 1366.1989 1842.5 1366.1174 1843.5 1366.0053 1844.5 1365.9915 1845.5 1366.0787 1846.5 1366.1284 1847.5 1366.2352 1848.5 1366.4086 1849.5 1366.383 1850.5 1366.1222 1851.5 1366.1305 1852.5 1366.0579 1853.5 1365.9297 1854.5 1365.7667 1855.5 1365.665 1856.5 1365.661 1857.5 1365.794 1858.5 1366.0168 1859.5 1366.3193 1860.5 1366.3914 1861.5 1366.2743 1862.5 1366.1073 1863.5 1366.0474 1864.5 1366.0001 1865.5 1365.8863 1866.5 1365.8231 1867.5 1365.7582 1868.5 1365.9292 1869.5 1366.1888 1870.5 1366.476 1871.5 1366.3867 1872.5 1366.316 1873.5 1366.0624 1874.5 1365.884 1875.5 1365.6433 1876.5 1365.599 1877.5 1365.5752 1878.5 1365.4549 1879.5 1365.4544 1880.5 1365.5734 1881.5 1365.746 1882.5 1365.6472 1883.5 1365.5213 1884.5 1365.6045 1885.5 1365.5679 1886.5 1365.4443 1887.5 1365.4098 1888.5 1365.3943 1889.5 1365.436 1890.5 1365.4713 1891.5 1365.6953 1892.5 1365.9115 1893.5 1365.9316 1894.5 1365.9647 1895.5 1365.9514 1896.5 1365.8818 1897.5 1365.646 1898.5 1365.6906 1899.5 1365.6201 1900.5 1365.5619 1901.5 1365.4493 1902.5 1365.4087 1903.5 1365.5463 1904.5 1365.6971 1905.5 1365.5142 1906.5 1365.6523 1907.5 1365.5702 1908.5 1365.6274 1909.5 1365.5968 1910.5 1365.5139 1911.5 1365.4962 1912.5 1365.5497 1913.5 1365.6208 1914.5 1365.7056 1915.5 1366.0476 1916.5 1366.2342 1917.5 1366.4705 1918.5 1366.4392 1919.5 1366.2164 1920.5 1366.1059 1921.5 1366.0237 1922.5 1365.9178 1923.5 1365.9088 1924.5 1365.9033 1925.5 1365.9759 1926.5 1366.0011 1927.5 1366.1698 1928.5 1366.074 1929.5 1365.9751 1930.5 1366.0317 1931.5 1365.9969 1932.5 1365.9665 1933.5 1365.9631 1934.5 1366.0975 1935.5 1366.3026 1936.5 1366.7184 1937.5 1366.7072 1938.5 1366.7317 1939.5 1366.7241 1940.5 1366.7949 1941.5 1366.7592 1942.5 1366.6771 1943.5 1366.5566 1944.5 1366.6024 1945.5 1366.8141 1946.5 1366.8834 1947.5 1367.2546 1948.5 1367.4923 1949.5 1367.359 1950.5 1367.1998 1951.5 1367.0516 1952.5 1366.9825 1953.5 1366.8958 1954.5 1366.8778 1955.5 1367.1282 1956.5 1367.6656 1957.5 1367.9917 1958.5 1367.8818 1959.5 1367.5702 1960.5 1367.6231 1961.5 1367.334 1962.5 1367.1234 1963.5 1367.0128 1964.5 1366.834 1965.5 1366.7924 1966.5 1366.9315 1967.5 1367.0203 1968.5 1367.0933 1969.5 1367.0899 1970.5 1366.9377 1971.5 1366.7375 1972.5 1366.8318 1973.5 1366.6555 1974.5 1366.6838 1975.5 1366.5701 1976.5 1366.5808 1977.5 1366.8432 1978.5 1367.4533 1979.5 1368.0713 1980.5 1368.1172 1981.5 1367.9037 1982.5 1367.579 1983.5 1367.4649 1984.5 1367.1799 1985.5 1367.0409 1986.5 1367.001 1987.5 1367.2029 1988.5 1367.8157 1989.5 1368.2017 1990.5 1368.1651 1991.5 1367.9996 1992.5 1367.7051 1993.5 1367.4 1994.5 1367.1455