A hybrid model of the CO2 geochemical cycle and its application to large impact events.

Abstract

A hybrid model of the carbonate-silicate geochemical cycle is presented which is capable of calculating the partitioning of carbon dioxide between the atmosphere, ocean, and sedimentary rocks. Determines how the modern and ancient marine biospheres might be affected by an oceanic impact of a large asteroid or comet. Disruption of the carbon cycle by an impact event cannot by itself explain the scarcity of calcium carbonate in sediments found within the first few centimeters above the K/T boundary. -from Authors