Difference between revisions of "Sunspot cycle"

Revision as of 01:46, July 1, 2010

Vandals will win.

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-[[File:Sunspot-temp-correlation.PNG|300px|right]]The '''sunspot cycle''' is a periodic variation in the number of [[sunspots]]. Over the last {{years ago|1755}} years, 23 of these have been observed with an average length of 11 years.<ref>"The number of sunspots reaches a maximum about every 11 years ..." [http://zebu.uoregon.edu/~soper/Sun/cycle.html Davison E. Soper, Institute of Theoretical Science, University of Oregon]</ref> A period of time when there are few sunspots is called a ''solar minimum''. The longest one was the [[Maunder Minimum]], and it corresponded with the [[Little Ice Age]] (1650 to 1850).<ref name=SantaFe>"That period also correlates with the Little Ice Age, which started in 1650 and ended in the mid-1800s." [http://www.santafenewmexican.com/HealthandScience/A-quiet-sun Low sunspot cycle fascinates scientists, who say there's no reason to panic] - Santa Fe New Mexican</ref>
+Vandals will win.
-Sunspot cycles are important because of their link to [[climate change]] on the earth. When there are few sunspots, the earth tends to get cooler, and vice versa. This may be the main driver of [[global warming]] and cooling.
-*...there is some evidence that a lack of sunspots can cause moderate cooling because of the way the sun interacts with Earth's outer atmosphere, said Alexei Pevtsov, staff astronomer at the National Solar Observatory in Sunspot, N.M.<ref name=SantaFe />
-==Notes==
-<references />
-==Links==
-*[http://www.paulmacrae.com/?p=34 Are sunspots to blame for climate change?] - Paul MacRae, May 31, 2008

Difference between revisions of "Sunspot cycle"

Revision as of 01:46, July 1, 2010

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