ZPEnergy.com - SCIENTISTS RECONSTRUCTED THE SUN'S ACTIVITY OVER THE LAST 11 MILLENNIA

The activity of the Sun over the last 11,400 years, i.e., back to the end of the last ice age on Earth, has now for the first time been reconstructed quantitatively by an international group of researchers led by Sami K. Solanki from the Max Planck Institute for Solar System Research (Katlenburg-Lindau, Germany). The scientists have analyzed the radioactive isotopes in trees that lived thousands of years ago. As the scientists from Germany, Finland, and Switzerland report in the current issue of the science journal "Nature" from October 28, one needs to go back over 8,000 years in order to find a time when the Sun was, on average, as active as in the last 60 years.

Based on a statistical study of earlier periods of increased solar activity, the researchers predict that the current level of high solar activity will probably continue only for a few more decades.

Full story at: http://www.physorg.com/news1788.html

CLIMATE UNCERTAINTY WITH CO2 RISE DUE TO UNCERTAINTY ABOUT AEROSOLS, November 01

Climate scientists agree that atmospheric carbon dioxide (CO2) has increased about 35 percent over the industrial period and that it will continue to rise so that CO2 will reach double its pre-industrial value well before the end of this century. How much this doubled CO2 concentration will raise Earth's global mean temperature, however, remains quite uncertain and is the subject of intense research - and heated debate.

Full story at: http://www.physorg.com/news1797.html


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