Comets and climate

Details Comets and climate Comets and climate

Dec 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009jastp..71.1766z&link_type=abstract

Journal of Atmospheric and Solar-Terrestrial Physics, Volume 71, Issue 17-18, p. 1766-1770.

Physics

Climate Variability, Paleoclimatic Temperature Records, Comet 1P/Halley, Cometary Dust

Scientific paper

No connection between comets and climate has been proposed until now; here, we show that such a connection exists. We use a model to evaluate the shadowing effect due to cometary dust released by comet 1P/Halley in the inner solar system. We find that comet Halley has left a detectable fingerprint in the climate records of the last two millennia. The print shows up as a periodic cooling of the order of 0.08 °C. This temperature drop is comparable with other natural fluctuations. The finding will add a brick to our knowledge of the climate system and could allow to improve our predictive capacity of future climate.

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