

1. SOLAR EVOLUTIONPARADOX: 4.5 billion years ago sun was ca. 8% smaller and ca. 3 % less luminous so solar constant was ca. 25 % less. As sun converts Hydrogen to Helium, the luminosity will continue to increase over next 4 by (Walter & Barry, 1991) 
R is the Wolf sunspot number g is the number of sunspot groups on the solar disk s is the total number of individual spots in all groups k is a variable scaling factor (usually <1) 
Science NASA (cycle 22) 
Wet MWP in the Southwest (Davis, 1994) 
Dry MWP Europe 
Dry MWP in the Sierra Nevada, high lakelevels during positive ^{14}C anomalies  
SUNSPOT MINIMA  PROXY RECORD  LAKE HIGH STAND  
Name  Name  Age ^{14}C  Age ^{10}Be  Jura Alps, Fr  Mono L., CA  
Dalton  1825 AD  1825 AD  
Maunder  Maunder  1710 AD  1710 AD  Clover Ranch  
Sporer  Sporer  1550 AD  1510 AD  Danberg Beach  
AD 1450  10ml road lowstand  
Wolf  Yuan  1330 AD  1290 AD  Rush Delta  
AD 1350  Simnis Ranch lowstand  
Medieval  Song  1050 AD  1010 AD  Post Office  
AD 1100  Lee Vining lowstand  
Roman IV  Medieval  690 AD  670 AD  P.Maclu 2  
Roman III  Wei  450 AD  430 AD  
AD 300  Marina Lowstand  
Roman II  270 AD  210 AD  
Roman I  90 AD  110 AD  P.Maclu 1  
Greek  330 BC  290 BC  Bourget  
Homeric  750 BC  770 BC  Bourget  
Egyptian  1370 BC  1370 BC  Pluvis  
Silver Lake  1870 BC  1910 BC  Dechambeau R.  
Noachan  2850 BC  2870 BC  
Sumerian II  3290 BC  3490 BC  Chalain  
Sumerian I  3570 BC  3690 BC  
Jerico  5190 BC  5030 BC  Cern  
Sahelan  5950 BC  6230 BC  
Eddy, 1977; Davis, 1992 
Youji, 1983  Magny, 1993  Stine, 1990; Stine, 1994 
Modeling 
Damon  AD 18801930  Global Temp 0.5 ^{o}C lower (Jones, 1988)  L 
Dalton  AD 17951825  "Year Without Summer" 1813  
Maunder  AD 16501710  Little Ice Age, Global Temp 12 ^{o}C lower  
Sporer  AD 14201540  Second Little Ice Age event  
Wolf  AD 12801340  The Great Drought  
Greek  330 BC  
Homeric  750 BC  
Egyptian  1370 BC  
Silver Lake  1870 BC  
Noachan  2850 BC  
The Greek and Homeric events together have been
called the "Hallstat Period"  a precurson or the Little Ice Age. REF All names informal, those in bold are in common usage. 
Cycle length 
Cycle name 
Last positive ^{14}C anomaly 
Next "warming" 
2241  Landscheidt  AD 1400 (cool)  AD 2520 
512  ?  not used  * 
232  ?  AD 1922 (cool)  AD 2038 
208  Suess  AD 1898 (cool)  AD 2002 
88  Gleisberg  AD 1986 (cool)  AD 2030 
22  Schwabe  
11  Hale  
* REFERENCES TO 512 YEAR CYCLE
