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Wiley InterScience | |||
  Astronomy & GeophysicsVolume 41 Issue 4, Pages 4.18 - 4.22 Published Online: 24 Dec 2001 © 2010 Royal Astronomical Society Published on behalf of the Royal Astronomical Society
Abstract | References | Full Text: HTML, PDF (Size: 118K) | Related Articles | Citation Tracking  Cosmic rays and climate The influence of cosmic rays on terrestrial clouds and global warming Note: Following completion of this paper, the authors were informed by Drs N Marsh and H Svensmark, that they have obtained similar results to those presented here. Marsh and Svensmark's paper will appear in a forthcoming issue of Space Science Review. Acknowledgements. The cloud D2 datasets were obtained from the NASA Langley Research Center EOSDIS Distributed Active Archive Center. The authors would like to thank K O'Brien, B Bromage and G McCormak for discussions and M Murphy for assistance with computing. Research at Armagh Observatory is grant-aided by the Department of Culture, Arts and Leisure for Northern Ireland. Copyright Blackwell Science Ltd. ABSTRACTWe analyse the new ISCCP (International Satellite Cloud Climatology Project) D2 cloud data to ascertain if a connection between cosmic-ray flux and cloud cover exists. Despite a previous finding that total-cloud factor and cosmic-ray fluxes were correlated, our results indicate that only the low-level cloud follows solar activity over the full period, 1983–94. Using several proxies for solar activity and the radiative forcing calculated by Ockert-Bell (1992) for the ISCCP cloud types, we estimate the possible impact that such a solar–terrestrial connection may have on climate. We conclude that, possibly excluding the most recent decades, much of the warming of the past century can be quantitatively accounted for by the direct and indirect effects of solar activity. ABSTRACTE Pallé Bagó and C J Butler outline the links between cosmic rays, clouds and the climate. | 
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