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Politics : BuSab
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To: Archie Meeties who wrote (416)3/31/2009 2:05:27 AM
From: Jorj X Mckie1 Recommendation  Read Replies (1) of 23934
 
Humans have been observing sunspot activity longer than 150 years and the cycles can be extrapolated from Berrylium-10 concentrations.
en.wikipedia.org

Note that the Berrylium-10 concentration levels and sunspot averages closely correspond with the temperature levels

I recommend reading up on the Maunder Minimum as it gives a pretty good idea how sunspots do affect the climate.
en.wikipedia.org

The current sunspot cycle is referred to as the "modern Maximum". It appears to have topped out in 1998, which also corresponds to the highest temperature averages for earth.
en.wikipedia.org

-Was there a general warming trend over the past 400 years? Yes
-Was this warming trend outside of normal climate cycles? No, in fact it appears to have a smaller amplitude compared to previous warming trends.
-Was the warming trend caused by CO2 levels? Maybe
-Was the warming trend caused by solar output levels? Maybe
-Was the warming trend caused by anthropogenic CO2 emissions? very doubtful since humans contribute about 2% of the total atmospheric CO2. One volcano erupting, or not erupting will offset any efforts we make toward affecting atmospheric CO2 levels. And previous warming trends occured without any meaningful of conceivable human contribution.

The reason I included the ocean temperatures is that the oceans store the vast majority of the sun's energy that is absorbed by the planet. The oceans drive our climate and weather. If the oceans are cooling (on average) it is a pretty storng indication that less energy from the sun is reaching the planet.
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