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dc.contributor.authorMelott, Adrian L.
dc.contributor.authorLieberman, Bruce S.
dc.contributor.authorLaird, Claude M.
dc.contributor.authorMartin, Larry D.
dc.contributor.authorMedvedev, Mikhail V.
dc.contributor.authorThomas, Brian C.
dc.contributor.authorCannizzo, J. K.
dc.contributor.authorGehrels, N.
dc.contributor.authorJackman, C. H.
dc.date.accessioned2012-05-01T18:26:52Z
dc.date.available2012-05-01T18:26:52Z
dc.date.issued2004
dc.identifier.citationMelott, A. L., B. S. Lieberman, C. M. Laird, L. D. Martin, M. V. Medvedev, B. C. Thomas, J. K. Cannizo, N. Gehrels, and C. H. Jackman. 2004. Did a gamma-ray burst initiate the late Ordovician mass extinction? International Journal of Astrobiology 3:55-61. http://dx.doi.org/10.1017/S1473550404001910
dc.identifier.urihttp://hdl.handle.net/1808/9204
dc.descriptionAvailable from the publisher at http://dx.doi.org/10.1017/S1473550404001910
dc.description.abstractGamma-ray bursts (GRBs) produce a flux of radiation detectable across the observable Universe. A GRB within our own galaxy could do considerable damage to the Earth's biosphere; rate estimates suggest that a dangerously near GRB should occur on average two or more times per billion years. At least five times in the history of life, the Earth has experienced mass extinctions that eliminated a large percentage of the biota. Many possible causes have been documented, and GRBs may also have contributed. The late Ordovician mass extinction approximately 440 million years ago may be at least partly the result of a GRB. A special feature of GRBs in terms of terrestrial effects is a nearly impulsive energy input of the order of 10 s. Due to expected severe depletion of the ozone layer, intense solar ultraviolet radiation would result from a nearby GRB, and some of the patterns of extinction and survivorship at this time may be attributable to elevated levels of UV radiation reaching the Earth. In addition, a GRB could trigger the global cooling which occurs at the end of the Ordovician period that follows an interval of relatively warm climate. Intense rapid cooling and glaciation at that time, previously identified as the probable cause of this mass extinction, may have resulted from a GRB.
dc.description.sponsorshipA.L.M. and B.S.L. acknowledge support from the US National Science Foundation; B.S.L. acknowledges support from a Self Faculty Award; B.C.T. acknowledges support from a Self Graduate Fellowship; and A.L.M. and B.C.T. acknowledge support from NASA and the Graduate Research Fund at the University of Kansas.
dc.language.isoen_US
dc.publisherCambridge University Press
dc.rights© 2004 Cambridge University Press.
dc.titleDid a gamma-ray burst initiate the late Ordovician mass extinction?
dc.typeArticle
kusw.kuauthorLieberman, Bruce S.
kusw.kudepartmentGeology
kusw.oanotesCambridge Univeristy Press http://www.sherpa.ac.uk/romeo/issn/1473-5504/ 23-Apr-12 ü Can Archive ü Can Archive "ü Restricted 12 month embrago" "•On authors personal or departmental web page or institutional repository or PubMed Central •Pre-print to record acceptance for publication •Publisher copyright and source must be acknowledged •Must link to publisher version •Authors version may be deposited immediately on acceptance •Publishers version/PDF may be used on authors personal or departmental web page any time after publication •Publishers version/PDF may be used in an institutional repository or PubMed Central after 12 month embargo •Articles in some journals can be made Open Access on payment of additional charge •If funding agency rules apply, authors may post articles in PubMed Central 12 months after publication or use Cambridge Open Option •Permission (not to be unreasonably withheld) needs to be sought if the author is at a different institution to when the article was originally published."
dc.identifier.doi10.1017/S1473550404001910
dc.identifier.orcidhttps://orcid.org/0000-0001-9091-0830
kusw.oaversionScholarly/refereed, publisher version
kusw.oapolicyThis item meets KU Open Access policy criteria.
dc.rights.accessrightsopenAccess


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