Exploring abrupt climate change induced by comets and asteroids during human history

July 25, 2013

Restored from the library fire 1/11/20
We find that the increases in 14C and 10 Be at the time of the Younger Dryas are consistent with the airburst of a long-period comet of the suggested mass, making this a plausible scenario. Overholt & Melott 2013 Cosmogenic nuclide enhancement via deposition from long-period comets as a test of the Younger Dryas…
Restored from the library fire 1/11/20
BBC The Mail  Phys.org Crickets Stein B. Jacobsen? and here and here Program Note: More recent posts can be found below Large Pt anomaly in the Greenland ice core points to a cataclysm at the onset of Younger Dryas The impact hypothesis (11), once declared dead (12, 13), recently gained new support from the discovery of siliceous scoria-like objects (SLOs) with global…
Restored from the library fire 1/11/20
The breakup in space of a comet or asteroid prior to impact could produce a surface or oceanic impact by the largest object, and hundreds of smaller fragments could create air-bursts affecting an entire hemisphere (Bunch et al. 2012). Approximately 90% of all ejecta from the main impact would fall within five crater radii,…
 
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