The stinkin' sun, again
Irene Wolfson sent me a Drudge flash about two books regarding the influence of solar activity on the earth's climate - a 1,500 year cycle. This roughly corresponds to one of the early entries in this blog where it was shown 1,000 years ago the average temperature in North America was almost identical to that of today. If I didn't have a life, I would research this further. The point is merely to express views not part of the consensus reality, not pretend to know the mind of God.
From prior entry:
So, you ask, does this have any implications regarding Mars' global warming? Damned if I know.
Sidebar: I see the US Congress is finally catching on to "climate change" as the best term as "global warming" is not exactly accurate as some places are freakin frezzing. Took them a few years to catch on, not bad for our Congress people. There are changes, of course, and that is nothing knew. It may be that the "average" is warming up, some places are. Then, let us see what happens as we enter the period of decreasing solar activity (which is now).
I don't think the link will work as it is a flash, so here is the piece. Don't panic, I agree the headline is probably too sweeping. Human's fart as well as cows.
Two New Books Confirm Global Warming is Natural; Not Caused By Human Activity
Tue Jan 30 2007 10:02:32 ET
Two powerful new books say today’s global warming is due not to human activity but primarily to a long, moderate solar-linked cycle. Unstoppable Global Warming Every 1500 Years, by physicist Fred Singer and economist Dennis Avery was released just before Christmas. The Chilling Stars: A New Theory of Climate Change, by Danish physicist Henrik Svensmark and former BBC science writer Nigel Calder (Icon Books), is due out in March.
Singer and Avery note that most of the earth’s recent warming occurred before 1940, and thus before much human-emitted CO2. Moreover, physical evidence shows 600 moderate warmings in the earth’s last million years. The evidence ranges from ancient Nile flood records, Chinese court documents and Roman wine grapes to modern spectral analysis of polar ice cores, deep seabed sediments, and layered cave stalagmites.
Unstoppable Global Warming shows the earth’s temperatures following variations in solar intensity through centuries of sunspot records, and finds cycles of sun-linked isotopes in ice and tree rings. The book cites the work of Svensmark, who says cosmic rays vary the earth’s temperatures by creating more or fewer of the low, wet clouds that cool the earth. It notes that global climate models can’t accurately register cloud effects.
The Chilling Stars relates how Svensmark’s team mimicked the chemistry of earth’s atmosphere, by putting realistic mixtures of atmospheric gases into a large reaction chamber, with ultraviolet light as a stand-in for the sun. When they turned on the UV, microscopic droplets—cloud seeds—started floating through the chamber.
“We were amazed by the speed and efficiency with which the electrons [generated by cosmic rays] do their work of creating the building blocks for the cloud condensation nuclei,” says Svensmark.
The Chilling Stars documents how cosmic rays amplify small changes in the sun’s irradiance fourfold, creating 1-2 degree C cycles in earth’s temperatures: Cosmic rays continually slam into the earth’s atmosphere from outer space, creating ion clusters that become seeds for small droplets of water and sulfuric acid. The droplets then form the low, wet clouds that reflect solar energy back into space. When the sun is more active, it shields the earth from some of the rays, clouds wane, and the planet warms.
Unstoppable Global Warming documents the reality of a moderate, natural, 1500-year climate cycle on the earth. The Chilling Stars explains the why and how.
Labels: Global warming