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rdf:type |
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lifeskim:mentions |
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pubmed:dateCreated |
1997-8-18
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pubmed:abstractText |
Without sufficient greenhouse gases in the atmosphere, the early Earth would have become a permanently frozen planet because the young Sun was less luminous than it is today. Several resolutions to this faint young Sun-frozen Earth paradox have been proposed, with an atmosphere rich in CO2 being the one generally favored. However, these models assume that there were no mechanisms for melting a once frozen ocean. Here we show that bolide impacts between about 3.6 and 4.0 billion years ago could have episodically melted an ice-covered early ocean. Thaw-freeze cycles associated with bolide impacts could have been important for the initiation of abiotic reactions that gave rise to the first living organisms.
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pubmed:commentsCorrections |
http://linkedlifedata.com/resource/pubmed/commentcorrection/11539550-11536547,
http://linkedlifedata.com/resource/pubmed/commentcorrection/11539550-11536595,
http://linkedlifedata.com/resource/pubmed/commentcorrection/11539550-11536616,
http://linkedlifedata.com/resource/pubmed/commentcorrection/11539550-11537797,
http://linkedlifedata.com/resource/pubmed/commentcorrection/11539550-11538074,
http://linkedlifedata.com/resource/pubmed/commentcorrection/11539550-11538392,
http://linkedlifedata.com/resource/pubmed/commentcorrection/11539550-11540884,
http://linkedlifedata.com/resource/pubmed/commentcorrection/11539550-11540918,
http://linkedlifedata.com/resource/pubmed/commentcorrection/11539550-11540934,
http://linkedlifedata.com/resource/pubmed/commentcorrection/11539550-11542193,
http://linkedlifedata.com/resource/pubmed/commentcorrection/11539550-16591973,
http://linkedlifedata.com/resource/pubmed/commentcorrection/11539550-17756316,
http://linkedlifedata.com/resource/pubmed/commentcorrection/11539550-17779689,
http://linkedlifedata.com/resource/pubmed/commentcorrection/11539550-2819806,
http://linkedlifedata.com/resource/pubmed/commentcorrection/11539550-5634660,
http://linkedlifedata.com/resource/pubmed/commentcorrection/11539550-6417344
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pubmed:keyword |
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pubmed:language |
eng
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pubmed:journal |
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pubmed:citationSubset |
S
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pubmed:chemical |
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pubmed:status |
MEDLINE
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pubmed:month |
Feb
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pubmed:issn |
0027-8424
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pubmed:author |
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pubmed:issnType |
Print
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pubmed:volume |
91
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pubmed:owner |
NASA
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pubmed:authorsComplete |
Y
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pubmed:pagination |
1248-50
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pubmed:dateRevised |
2010-9-14
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pubmed:meshHeading |
pubmed-meshheading:11539550-Amino Acids,
pubmed-meshheading:11539550-Atmosphere,
pubmed-meshheading:11539550-Biogenesis,
pubmed-meshheading:11539550-Carbon Dioxide,
pubmed-meshheading:11539550-Earth (Planet),
pubmed-meshheading:11539550-Evolution, Planetary,
pubmed-meshheading:11539550-Ice,
pubmed-meshheading:11539550-Minor Planets,
pubmed-meshheading:11539550-Oceans and Seas,
pubmed-meshheading:11539550-Seawater,
pubmed-meshheading:11539550-Sunlight
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pubmed:year |
1994
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pubmed:articleTitle |
Impact melting of frozen oceans on the early Earth: implications for the origin of life.
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pubmed:affiliation |
Scripps Institution of Oceanography, University of California at San Diego, La Jolla 92093-0212, USA.
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pubmed:publicationType |
Journal Article,
Research Support, U.S. Gov't, Non-P.H.S.
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