Via 'Science' online: http://sciencenow.sciencemag.org/cgi...ull/2007/810/3
This article illustrates how important it is to include natural climate forcers in one's model. This article does not contradict the assertion that anthropogenic CO2 emissions are driving climate change, but it does imply that other climate forcers must be factored in when trying to predict the short-term and long-term effects of those CO2 emissions on the climate.Now, U.S. and British researchers have discovered that the sunspot cycle correlates with the intensity of rainfall in East Africa and with the rise and fall of water levels in the region's largest body of water, Lake Victoria. As they report in this week's Journal of Geophysical Research—Atmospheres, over the entire 20th century the three measurements match statistically: About every 11 years, rainfall amounts spike in East Africa. The curious thing, however, is that the peaks of East African rainfall consistently precede the solar maximum by 1 year....with the next solar maximum due sometime in 2011 or 2012, East Africans should expect more rain in 2010 or 2011, along with an accompanying surge in insect-borne diseases triggered by wetter weather.
More on sunspots here: http://solarscience.msfc.nasa.gov/SunspotCycle.shtml
Edit: Take a good look at that last graph. We are in a minimum right now. Another maximum is slated to occur between 2010 and 2020. This means that, in addition to the effects of CO2-forcing on earth's heat balance, we'll have greater heat input from solar radiation. Yikes!