Physics
Scientific paper
May 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994stin...9432740p&link_type=abstract
Progress Report, FY 1993 Geo Eco Arc Research, La Canada, CA.
Physics
Atmospheric Chemistry, Atmospheric Effects, Climate Change, Cretaceous-Tertiary Boundary, Hypervelocity Impact, Meteorite Craters, Meteoritic Damage, Paleoclimatology, Aerosols, Atmospheric Models, Meteorite Collisions, Radiative Transfer, Sulfuric Acid
Scientific paper
The Chicxulub Crater in Yucatan, Mexico, is the primary candidate for the impact that caused mass extinctions at the Cretaceous/Tertiary boundary. The target rocks at Chicxulub contain 750 to 1500 m of anhydrite (CaSO4), which was vaporized upon impact, creating a large sulfuric acid aerosol cloud. In this study we apply a hydrocode model of asteroid impact to calculate the amount of sulfuric acid produced. We then apply a radiative transfer model to determine the atmospheric effects. Results include 6 to 9 month period of darkness followed by 12 to 26 years of cooling.
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