by steam_cannon » Wed 18 Jul 2007, 14:36:18
$this->bbcode_second_pass_quote('azreal60', 'T')hat's not a bad list of steps at all.
Yeah, asdar's list is a very good list...
Now here's the very bad list!I would take all the scrubbers off of coal plants and purposefully spread dark soot over polar ice!
But seriously, I have good reason for saying this. Taking scrubbers off coal plants would increase efficiency a few percent and more importantly it would keep up
global dimming. Global dimming is caused by soot in the atmosphere and since the 1950's has been blocking 10% average of the worlds sunlight (20% in the northern hemisphere). Our past was literally a brighter time. And global dimming seems to be the reason the world has only heated by 0.6 degrees from global warming thus far, it would be at least 1.8 degrees higher then that.
So I would encourage wind power with extra sooty coal power as backup power. That way we could cut carbon emissions and maintain the same soot levels in the atmosphere. This plan might put us on track to a gentle powerdown scenario and a soft landing for global warming, if implemented over the next hundred years.
Basically it's the "Highlander II" problem. Sharply ending mixed CO2 / soot emissions could trigger catastrophic global warming. It has been suggested that an alternative method to encourage global dimming would be to seed the upper atmosphere with sulfur compounds, but dirty burning of coal might be a simpler solution. Ironically the fact that only the dirtiest fossil fuels are left at the end of this age might be a good thing...
Also, I might suggest purposefully spread dark soot over polar ice to melt the poles. This would be to deepen the oceans and stabilize clathrate deposits. Melting the polar ice could deepen the oceans and stabilize ocean clathrate deposits in a warmer world. And yes, melting floating water can deepen the ocean because of salt/freshwater density differences. But I would focus on the ice on land.
Destabilizing clathrates can release huge quantities of methane into the atmosphere. Such releases have been implicated in mass extinctions in the earths past, when the sun was a dimmer star. People can move to higher ground if sea levels rise. But if clathrate destabilization happens again and causes run away global warming, this ice will melt anyway and people can't move to a different planet.
Another strategy,
make a big push to burn clathrates and encourage the release of CFC's! Burning the methane clathrate deposits would dam the earth, guaranteeing the earth would probably not recover from the next ice age. Clathrates bubble up if the sea levels dip too low from glaciers forming on land. The methane then holds heat in and melts the ice... But if we didn't care about damming the earth to a cold death in < 10,000 years, we could burn the clathrates... Burning them into carbon dioxide could avert the clathrate gun hypothesis and catastrophic global warming in the present with minimal rising sea levels.
Also it seems the ozone hole may be influencing winds such that warm air is staying away from the poles. This means there is a lot less melting then there should be. If we want to keep that up, pumping out CFC's to maintain the ozone hole might be a way to keep the ice unmelted and prevent sea level rise.
Well, all amusing ideas... Personally, I think the clathrates should stay in place to protect the earth from turning into a permanent iceball planet after the next ice age. And not be allowed to bubble up as that could cause runaway global warming in the present. Talk about walking a knifes edge...
So my suggestions are cooling the earth with particulates and possibly melting the poles to stabilize clathrates, even though this would risk stagnation of the oceans and could result in dangerous levels of sulfur dioxide in the atmosphere. But it might be possible to purposefully melt polar ice if done done carefully so that outflows are in areas that minimally disrupt ocean currents...
$this->bbcode_second_pass_quote('wiki', '
')Clathrate gun hypothesis

The clathrate gun hypothesis states that as sea temperatures rise the sudden release of methane from methane clathrate compounds buried in the seabeds will cause a drastic alteration of the ocean environment and the atmosphere of earth, as recent analysis concerning the Permian extinction event indicates may have happened in the past.
http://en.wikipedia.org/wiki/Clathrate_gun_hypothesis It's a good idea to try to avoid extinction level events, IMO...
')Currently, most climate change models predict a 5 degrees increase in temperature over the next century, which is already considered extremely grave.
Global dimming can be dealt with by cleaning up emissions.
However, if global dimming problems are only addressed, then the effects of global warming will increase even more.