På WUWT hittar jag en referens till en nypublicerad studie om solens inverkan på jordens klimat. Författarna tycks, mot vad tidigare ansetts, ha kommit fram till att solen kan tänkas kyla jorden i tider av hög solaktivitet och tvärtom.
”Today’s study looked at the Sun’s activity over the period 2004-2007, when it was in a declining part of its 11-year activity cycle.
Although the Sun’s activity declined over this period, the new research shows that it may have actually caused the Earth to become warmer. Contrary to expectations, the amount of energy reaching the Earth at visible wavelengths increased rather than decreased as the Sun’s activity declined, causing this warming effect.
Following this surprising finding, the researchers behind the study believe it is possible that the inverse is also true and that in periods when the Sun’s activity increases, it tends to cool, rather than warm, the Earth. This is based on what is already known about the relationship between the Sun’s activity and its total energy output.”
Vad innebär det för klimatforskningen? Ja, en av studiens författare säger: ”this could suggest that we may have overestimated the Sun’s role in warming the planet, rather than underestimating it.” Mera bevis för AGW, eller precis tvärtom?