2004
DOI: 10.1029/2004je002279
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Abstract: [1] Widespread fires can be generated after large impact events by atmospheric heating caused by the reaccretion of high-energy, vapor-rich plume material. We examine the threshold irradiance levels necessary for spontaneous and pilot ignition of various types of vegetation and define three specific cases for investigation: (1) 51 kW/m 2 for a period of at least 2 min to spontaneously ignite wood; (2) 20 kW/m 2 for a period of at least 20 min to ignite wood in the presence of an ignition source; and (3) 28 kW…

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