David Archibald has a number of presentations available including from his web site, www.DavidArchibald.info. He has proposed a connection where the length of a solar sun spot cycle affects the earth's temperatures, with shorter cycles causing warmer temperatures or longer cycles causing cooler temperatures.

The charts in this web page set plot the relationship of the solar sun spot cycle lengths and the 10-year average temperature anomalies in the GISS raw data set. The temperature values are averages over the 10-year span centered on the next solar cycle maximum, assuming that much of a lag from the effects of a solar cycle (where a shorter cycle presumably adds more heat to the earth’s oceans while a longer cycle presumably adds less heat). For each chart, if there were a tight correlation between solar cycle length and temperature trends then the averages would plot from the upper left (where shorter cycles are warmer) to the lower right (where the longer cycles are cooler). Around the world some locations follow this relationship closer than do others. Locations in the upper Northern Hemisphere seem to conform better than locations elsewhere.

The regions are separated here just for ease of viewing. There is no additional analysis included here per region. The regional averages (or world averages) were calculated in that page but there is no regional sun spot cycle analysis. A comparison between the 10-year average of the temperature anomalies with the CO2 levels is presented in another page. A presentation of the differences between in the GISS raw and homogenized data sets is presented in another page.

Midwest Cycles

Northeast Cycles

Southeast Cycles

West Cycles

World (outside of USA) Cycles


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created - Jan. 2011
last change - 01/12/2011