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Terra biosphere mass extinction

  1. Dec 2, 2008 #1

    Is Terra's biosphere dying?

    Reference:
    http://www.youtube.com/watch?v=x2SNKvVOrMk"
    http://en.wikipedia.org/wiki/Sun#Life_cycle"
    http://arxiv.org/PS_cache/arxiv/pdf/0801/0801.4031v1.pdf" [Broken]
    http://news.bbc.co.uk/1/hi/sci/tech/specials/washington_2000/649913.stm" [Broken]
    http://en.wikipedia.org/wiki/Biosphere#Extent_of_Earth.27s_biosphere"
    http://en.wikipedia.org/wiki/Extinction#Modern_mass_extinction"
     
    Last edited by a moderator: May 3, 2017
  2. jcsd
  3. Dec 4, 2008 #2
    Well basically, most are unverifiable speculations approaching philosophy. I doubt about the habitable zone if it's based on a radiation model only, neglecting convection/advection of heat. If there is more sunlight, you would expect the earth just evaporating more water and thus having more clouds, which is increasing reflextivity, which lowers the absorbted radiation and hence keeps the temperature lower. But the end must be somewhere.
     
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