Re: Methane in the late Archean

From: glenn morton (mortongr@flash.net)
Date: Sat Jun 03 2000 - 03:45:44 EDT

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    Adam wrote:
    >Adam: To me this is suggestive of a Concordist scenario in which the Earth is enshrouded in >aerosols formed from photochemical reactions on methane in the upper atmosphere, thus covering >the heavens but allowing light to pass through producing a diurnal cycle. It's believed that the >Sun's UV production is decreasing over the aeons so in the late Archean upper atmospheric >processes would have been greater than the present day. Also methane implies life since that's >about the only way it can be produced in sufficient quantities under so much photochemical >breakdown.

    >Prior to methane being the major greenhouse gas perhaps the Earth was covered in carbon dioxide >ice clouds which would act as infrared heat traps, allowing liquid water oceans in the first >aeons of the Dim Sun, but would totally obscure the heavens. Thus the first creative act of God >in Genesis, the creation of the diurnal cycle might imply the creation of life - the >methanotrophic ecosystem - that preceded the rest of Creation?

    Can you provide either a reference or calculations to show that such aerosols would form in the requisite amounts? What are the chemical pathways and what is the composition of the aerosols?
    I am skeptical that this would work.

    glenn
      



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