GEOPHYSICS: Daggers Are Drawn Over Revived Cosmic Ray-Climate Link
Science 11 January 2008:
Vol. 319. no. 5860, p. 144
“Last year, climate change scientists thought they had driven a silver stake through the idea that fluctuations in solar activity were behind global warming in the last century. Now, a high-profile team led by geophysicist Vincent Courtillot, director of the Institut de Physique du Globe in Paris, has sought to raise the dead in a paper linking changes in Earth’s magnetic field to temperature variations in recent millennia.
The paper, which appeared last year in Earth and Planetary Science Letters, has drawn fierce criticism, including a rebuttal in the 15 January issue of EPSL, and sparked a rancorous debate on a climate blog. “There is nothing new nor valuable in Courtillot’s paper,” asserts Gilles Delaygue, a geochemist at the University Paul Cézanne Aix-Marseille 3. Not so, says Courtillot. “If we are proven to be right, this will seriously backlash on scientists’ credibility,” he says. …”