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Thread: Solar shield idea to address climate change.

  1. #31
    Join Date
    Dec 2004
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    Quote Originally Posted by grapes View Post
    Or, the 6 looks like a b. A fine line, I guess.

    Formerly Frog march.

  2. #32
    Join Date
    Dec 2006
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    Quote Originally Posted by Darrell View Post
    It probably is not a straightforward relationship. Many (most?) plants will produce more chlorophyll in lower light conditions. For example, SOP for nurseries is to cycle green plants through a period of shade as final preparation for sale because it causes them to become more green. Obviously there are limits but it is possible that up to some threshold reducing sunlight wouldn't cause a significant change in the rate plants remove CO2 from the atmosphere.
    Actually, it's pretty much established that reduced sunlight allows tropical plants to grow faster, and to use more fertilizer (CO2)

    http://climate.envsci.rutgers.edu/pd..._Robocknew.pdf

  3. #33
    Join Date
    Feb 2005
    Posts
    11,084
    The best thing about a sun-shield SPS syatems is that it can also serve as DE-STAR or STARSHOT infrastructure--or even as this:
    https://www.nextbigfuture.com/2017/1...ar-flares.html
    https://www.trekbbs.com/threads/spac...-power.267454/

    The worst geohacks would be the stratospheric injection of SO2. The chem-trail folks would go ape, we get acid rain, and if a big volcano goes up, we get a double dose and freeze over.

    With active structures in space, you can dial it up, and dial it back, so as to not hurt photosyth' (cloudy days cool without killing plants after all.)

    If Earth gets too cold, reflect more light on us, if the Sun dims. Over time--the Sun will brighten, so we need solar shades at some point anyway, CO2 or not. Even if we ran out of hydrocarbons--warming will continue:
    https://www.americanbazaaronline.com...ands-of-years/

    I wonder if you could put sunshades into looping Molniya orbits, edge on most of the time so as to avoid over cooling--but reflecting sunlight as they near the poles, where less plants are bothered, and where you need the most cooling.

    If nothing else, place SPSS in sunsynch, where you never are in the shadow. With space based structures, you have options:

    https://www.technologyreview.com/s/4...mate-revealed/

    "Reflecting sun away from the earth by launching sunshades into space or injecting reflective manufactured particles into the stratosphere tops UEA’s list, showing the greatest potential to cool Earth back to preindustrial temperatures by 2050, when combined with serious greenhouse-gas reductions."
    https://www.technologyreview.com/s/4...ng-the-planet/
    Last edited by publiusr; Yesterday at 09:01 PM.

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