I find this global warming thing a bit humorus [sic] at times. The whole galaxy is warming up, it has very little to nothing to do with our use of gasoline or coal, it has to do with changes on the sun.This is a perfect example of how self-styled debunkers of 'junk science have succumbed to 'junk science. Even if the galaxy were heating up, it would have little if no effect on earth for a long, long time. Global warming is here and now. This is not the first time the GOP has tried to invent an entirely new phenomenon.
When the Sun becomes a red giant it will steadily lose mass and affect the orbits of the planets, making it hard to predict what will happen to them. Scientists think it is likely that Mercury and Venus will evaporate as the Sun's surface expands outwards, but the fate of Earth is less certain. --PhysicsWord.com, Earth could survive a red-giant SunLet's take the sun out of the equation. The nearest star to earth is Proxima Centauri, about 4.2 light years from earth. On a very clear night, far, far from city lights you might seek out Proxima Centauri with a good pair of 10x50 binoculars and a very steady tripod. Serious amateur astronomers will have a reflecting telescope, a steady mount and a clock drive. It is highly doubtful that the amount of 'heat' from Proxima Centauri on earth is measurable and certainly not in our life times.
Sunspot-driven changes to the sun's power are simply too small to account for the climatic changes observed in historical data from the 17th century to the present, research suggests. The difference in brightness between the high point of a sunspot cycle and its low point is less than 0.1 percent of the sun's total output. "If you run that back in time to the 17th century using sunspot records, you'll find that this amplitude variance is negligible for climate," Foukal said. --National Geographic, Don't Blame Sun for Global Warming, Study SaysI am of the opinion that the sun has become a convenient 'fall guy' for a political mindset that seeks out 'fall guys' to cover its own inadequacies.
I think some people have suggested that increasing solar intensity over millennia. But it seems to be the consensus that the current warming can't be explained by observed changes in the sun. I'll quote from something I wrote on another blog:http://futuregeek.blogspot.com/2006/07/5-global-warming-myths-debunked.html
From a 2003 Science Daily article NASA Study Finds Increasing Solar Trend That Can Change Climate: "Although the inferred increase of solar irradiance in 24 years, about 0.1 percent, is not enough to cause notable climate change, the trend would be important if maintained for a century or more. Satellite observations of total solar irradiance have obtained a long enough record (over 24 years) to begin looking for this effect." (emphasis mine) Note that we are only at the beginning stages, and there is not conclusive evidence of any significant solar effect. If the observed changes had been consistent over a century, they could have contributed a small amount to global warming. Indeed, the scientist who performed the study said: "Solar forcing would provide only about one-fourth as much warming [as GHG], if the solar trend persists over the same period. Solar forcing could be significant, but not dominant." Quoted from here.- Advertisement -