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Impakwinter.
Impakwinter
’n Kunstenaarsvoorstelling van ’n groot meteoriet wat die Aarde tref.
’n Impakwinter is ’n uitgerekte tydperk van koue weer weens die botsing van ’n groot asteroïde of komeet met die Aarde. As ’n hemelliggaam die Aarde op land of in vlak water sou tref, sou dit ’n enorme hoeveelheid stof, as en ander materiaal die lug inwerp en dit sou die Son se lig afkeer. Dit sou die temperatuur oor die hele Aarde drasties laat daal.[1][2]
As ’n hemelliggaam met ’n deursnee van 5 km of meer die Aarde in diep water sou tref of sou ontplof voor dit die oppervlak tref, sou daar steeds ’n enorme hoeveelheid afval die lug ingewerp word.[1][3][2] Daar word gemeen ’n impakwinter kan tot ’n massauitwissing lei en baie van die spesies op Aarde laat uitsterf.
↑ 1,01,1CHAPMAN, CR; MORRISON, D., "Impacts on the Earth by Asteroids and Comets - Assessing the Hazard", Nature367 (6458): 33–40, doi:10.1038/367033a0
↑ 2,02,1MACCRACKEN, MC; Covey, C.; Thompson, S.L.; Weissman, P.R., "Global Climatic Effects of Atmospheric Dust from An Asteroid or Comet Impact on Earth", Global and Planetary Change9 (3-4): 263–273
↑Lewis, John S. (1997), Rain Of Iron And Ice: The Very Real Threat Of Comet And Asteroid Bombardment, Helix Books, ISBN0-201-48950-3
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