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Record 1 of 990
Ignition of global wildfires at the Cretaceous/Tertiary boundary
External Online Source: doi:10.1038/343251a0
Author and Affiliation:
Melosh, H. J.(Arizona Univ., Tucson, AZ, United States)
Schneider, N. M.(Arizona, University, Tucson, United States)
Zahnle, K. J.(NASA Ames Research Center, Moffett Field, CA, United States)
Latham, D.(U.S. Forest Service, Missoula, MT, United States)
Abstract: The recent discovery of an apparently global soot layer at the Cretaceous/Tertiary boundary indicates that global wildfires were somehow ignited by the impact of a comet or asteroid. It is shown here that the thermal radiation produced by the ballistic reentry of ejecta condensed from the vapor plume of the impact could have increased the global radiation flux by factors of 50 to 150 times the solar input for periods ranging from one to several hours. This great increase in thermal radiation may have been responsible for the ignition of global wildfires, as well as having deleterious effects on unprotected animal life.
Publication Date: Jan 18, 1990
Document ID:
19900035038
(Acquired Nov 28, 1995)
Accession Number: 90A22093
Subject Category: LUNAR AND PLANETARY EXPLORATION
Document Type: Journal Article
Publication Information: Nature; p. 251-254; (ISSN 0028-0836); 343
Publisher Information: United Kingdom
Financial Sponsor: NASA; United States
Organization Source: Arizona Univ.; Tucson, AZ, United States
NASA Ames Research Center; Moffett Field, CA, United States
Forest Service; Missoula, MT, United States
Description: 4p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: CRETACEOUS-TERTIARY BOUNDARY; FIRES; IGNITION; THERMAL RADIATION; EXTINCTION; HYPERVELOCITY IMPACT; SOOT
Imprint And Other Notes: Nature (ISSN 0028-0836), vol. 343, Jan. 18, 1990, p. 251-254.
Availability Source: Other Sources
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