Physics
Scientific paper
Dec 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005agufm.a52b..01k&link_type=abstract
American Geophysical Union, Fall Meeting 2005, abstract #A52B-01
Physics
1650 Solar Variability (7537), 2104 Cosmic Rays, 3305 Climate Change And Variability (1616, 1635, 3309, 4215, 4513), 3311 Clouds And Aerosols, 3344 Paleoclimatology (0473, 4900)
Scientific paper
Palaeoclimatic data provide extensive evidence for solar/cosmic ray forcing of Earth's climate on all timescales, but the underlying mechanism remains a mystery. However, satellite data suggest that clouds may be influenced by galactic cosmic rays, which are modulated by the solar wind, by the geomagnetic field and, on longer timescales, by galactic variations. Physical mechanisms to explain the cloud observations have been proposed and modelled. Although these are supported by recent atmospheric observations, definitive mechanistic experiments are lacking. In order to test whether cosmic rays and clouds are causally linked, a novel experiment known as CLOUD has been proposed using a beam from a CERN particle accelerator. This paper presents an overview of the palaeoclimatic evidence for cosmic ray forcing of Earth's climate, and reviews the possible physical mechanisms and the experimental prospects.
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