Computer Science
Scientific paper
Aug 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997nasa.repts....p&link_type=abstract
Technical Report, NASA-CR-205210; NAS 1.26:205210
Computer Science
Craters, Impact Damage, Acid Rain, Aerosols, Asteroids, Cretaceous-Tertiary Boundary, Ocean Currents, Water Vapor, Carbon Dioxide, Targets, Rocks, Projectiles
Scientific paper
A comprehensive analysis of volatiles in the Chicxulub impact strongly supports the hypothesis that impact-generated sulfate aerosols caused over a decade of global cooling, acid rain, and disruption of ocean circulation, which contributed to the mass extinction at the Cretaceous/Tertiary (K/T) boundary. The crater size, meteoritic content of the K/T boundary clay, and impact models indicate that the Chicxulub crater was formed by a short period comet or an asteroid impact that released 0.7-3.4 x 1031 ergs of energy. Impact models and experiments combined with estimates of volatiles in the projectile and target rocks predict that over 200 gigatons (Gt) each of SO2 and water vapor, and over 500 Gt of CO2, were globally distributed in the stratosphere by the impact.
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