Wednesday, April 20, 2011
Cosmic Ray Forcing Factor Significant
A lot has been done in terms of understanding the impact of cosmic rays, including a prediction for a harsh winter as a result in a sharp reduction in the Earth’s magnetic field last year. We know that the harsh winter duly arrived and kicked butt.
This at least provides us with a scale for the forcing impact. It plausibly is far greater than any human based inputs.
Thus the shift in input discerned last year was an excellent predictor of a derivative climate change. The good news is that the magnetic field should have blown back out with the recent surge in sun spot activity. So maybe it will be back to good weather next year.
Now if we could only figure out how the heat is getting into the
Top Indian space boffin beams down climate shocker
By Andrew Orlowski
U R Rao has analysed 45 years of data and declared that the forcing from charged particles is higher than previously thought, at 1.1Wm-2, and human-forcing lower than the IPCC "consensus" of 1.6Wm-2.
Rao should know his muons. He launched
's satellite program in the
70s, and became head of the Indian Space Agency in the 1980s; many of his 350
published papers are about galactic cosmic rays (GCRs). He makes an unlikely
candidate for a skeptic, having written books on sustainability and
implementing the United Nations' Agenda 21. India
The influence of charged particles on climate is controversial, not least because it's based on observation and physics experiments, rather than trick cycling computer modelling. GCRs have been demonstrated to "seed" cloud formation, and small variations in cloud cover are known to have significant impacts on surface temperature.
The IPCC estimates human forcing via greenhouse gas emissions to be 1.6Wm-2, whereas clouds reduce the amount of incoming radiation received by 44Wm-2, also reducing the outgoing (longwave) radiation by 31Wm-2.
The quantity of GCRs reaching Earth depends on the solar magnetic field and Earth's own magnetosphere, which act as umbrellas shielding the surface from the particles. The strength of this "background drizzle" of GCRs varies, depending on the Earth's relative position to the galaxy. A major experiment called CLOUD ("Cosmics Leaving Outdoor Droplets") using CERN's original proton particle accelerator, has been designed to study how charged particles nucleate clouds. It finally cranked into life in 2009.
Full results have yet to be published, but confirm the relationship. Others argue that cosmic ray penetration to surface level is merely a proxy for solar magnetic activity.
Despite the controversy, supporters point to both short-term and long-term correlations between cosmic ray activity and climate.
The report was commissioned by Indian environment minister Jairam Ramesh, who has described the manmade global warming hypothesis as a "religion".
"We’re not denying the contribution of greenhouse gases — we’re only trying to expand the scientific debate to look at some non-greenhouse gas factors that may also influence global warming," Ramesh told the Telegraph of