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Global Warming – Cloud-Spraying Unmanned Ships Can Stop Warming

posted March 15, 2007 - 9:21pm
Global Warming – Cloud-Spraying Unmanned Ships Can Stop Warming

One of the smartest and well-analyzed solutions to global warming consists of building special unmanned ships that would operate with wind power and have a single mission: to suck in sea water and then vaporize it into huge mist clouds over the surface of the water.

The sun's rays would be reflected off such a cloud-shield and eventually the surface temperature would start to drop.

Stephen Salter of the University of Edinburgh has actually subjected the idea to scientific simulations and have decided that, yes, the idea might actually work.

Each ship, capable of spraying 22 lb (10 kg) of sea water per second, can be built for just a few million dollars. Imagine... 50 of these totally automated ships operating 24x7 around the seas and oceans of the world can “cancel out a year's worth of global carbon-dioxide emissions” within a year, according to an Economist report.

When such practical solutions do exist, what do the nations of the world are waiting for?



Comments

I wish I could be of more help...

Les, thanks for all your explanations, references, and feedback on my original posting. Unfortunately, I'm not a scientist specialized in this field. So I cannot go any deeper into this topic than I already have. As I said in an earlier comment, my source is the ECONOMIST magazine. I'm pretty sure it was in a mid-March issue but I probably threw it away. They had a fantastic report about green technologies and this was one of the many ideas and developments covered in that report.

I seem to be apologizing a lot recently.

Karbon, my apology will only go so far. I apologize for misunderstanding, and complain you did not properly cite anthing to straighten us all out. If you had stated " I THINK THIS " then we would have a better point of departure. . . I do not buy into the scheme, though it is interesting. I read of the scheme several years back in another guise and misunderstood what was being said here. You did not cite with a good link, anything in the comments of the posting so where exactly did the idea you refer to come from? I admit and apologize for having the same difficulty in the fact that I actually assumed you were referring to stratospheric (say above 10 km, 33,000ft) injection of liquid water to atmosphere, which form nice icy cirrostratus cloud, such injection to take advantage of the albedo and aerosol cooling benefits of "contrail-like" high thin clouds. Below, though some of these articles do seem to be similar to your source of information, they are foggy (cloudy and nebulous) on hard details -- but the pictures of ocean-going automatic spray ships (Artists conception) are adequate to get the point across to me, finally. This is an albedo scheme, attempting to get the lowlevel clouds to reflect insolation back to space, and thereby counteract the effects of CO2 warming by cooling the Oceans hottest areas; see below links. I suppose it could help, but the main problem of re-sequestering the CO2 is ignored and that is the initial problem. A CO2 induced permafrost melt and methane release is a really dangerous atmospheric heating mechanism, and the mechanism occurs well above most sequestration capacities or mechanical Carbon capture and reinvestiture schemes. "Natural Gas" is largely methane CH4, and a few more complex CxHx and burning it gives H2O and CO2 -- which does not help the over all CO2 budget which needs constraint. Salter is an exceptional and talented engineer scientist in his 70's I think. Fascinating ideas, even if I disagree for cause. =================== Pub, the energy to vaporize water in the scheme actually comes from the atmosphere (ambient temp) and the idea is to expose more water molecules to evaporation by increasing the surface area via a spray of water. A variety of renewable on board ship mechanisms are the pump power source; from wind (sea anchor approach) to wave energy extraction. . . for the pumping. Certainly you gave seen Large ships with major pumping capabiities. (Seawater is alive, the clogging of seawater spray nozzles is a serious problem being addressed.) The energy in the air supplies the energy of vaporization with the water already at a high temp. [I note that the very hot area's of ocean the scheme purports to cool probably have high humidities and water vapor saturated volumes so the amount of water actually vaporized woud be limited -- like trying to use a swamp cooler in already highly humid Florida. I have not the slightest objection (But it seems you do) to massive and complete switch over to nuclear power. Except this: Very limited role of private enterprise operation, very limited use of contractors, of subcontractors, of any profit motivated engagement. This is an area where skimming profit for a few or a corporation MUST be eliminated, benefits are for the society not for a few scum skimmers. That profit scheme worldwide and petroleum interests are what has produced the current situation, and the hysteria you claim for CO2 is pushed to nuke fear by the petrol companies. This is where France has done it largely right and we have had a bunch of skim crooks sleazing money with a safety trade-off. TMI, St Vrain, etc. all sunk by skim and incompetence, at the CEO level, and all the tway down, and where the idea of beating up on your neighbor or the I am better than you and you deserve to pay me for it is not needed or wanted in our society. ====================== (Pub, find someother line to respond, or at least see if you can write stuff that can earn hits and ads on its own, write about batteries or something, and maybe we can get going again. good luck!) ====================================== These links are or may be helpful for this thread: http://www.sciencemag.org/cgi/content/full/299/5605/339?maxtoshow=&HITS=10&hits=10&RESULTFORMAT=&fulltext=stephen+salter&searchid=1&FIRSTINDEX=0&resourcetype=HWCIT I am a member of AAAS, so not sure what access level nonmenbers can get -- I would have to re-write the above to post it. (Article by Richard Stone) but there are other sources like these: http://www.brdt.org/content/fx.brdt/resources/S_Salter_paper_BBK.pdf http://www.scenta.co.uk/nature/global_warming.cfm?cit_id=1687489&FAArea1=widgets.content_view_1 http://www.scenta.co.uk/scenta/news.cfm?cit_id=798338&FAArea1=customWidgets.content_view_1 http://abob.libs.uga.edu/bobk/ccc/cc120502.html Heed the copyright warnings on this above site.

Yes, this would be a

Yes, this would be a brilliant idea...except for one major problem. How would you expect to spray 22 lbs. per second of sea water into the air and vaporize it? Wind power? Solar power? I'm not sure that you can fit enough windmills or solar panels on a ship to generate that kind of power. It would most likely rely on petroleum or coal powered energy, so it would defeat the whole purpose...or of course, (GASP!) nuclear energy. This is considered a "practical" solution?

Does nothing for the CO2, not a thing. Water is not yet forcing

The data is not in completely though it looks like this could cool similarly to aerosls in the stratosphere. The Water Methane, and water Nitrous Oxide intereface is being studied. I love when something costs nothing! like being reported here. You should develop the Salter idea Karbon. How high and how does it go up? Let's see? energy is never lost or destroyed, but is transformed. Check! Uh, "You can't get something for nothing." (entropy, snd law thermo.)Check! So how does the thing work on wind? I noticed pup says it is a heater; when Stephen Salter says it is a cooler. Gosh. It is both and more. http://www.xomba.com/ice_cores_air_temp_rises_before_co2_rises_explain_that_h2o_ignored_as_greenhouse_gas_contributing_to_rising_temperature_why Salter has some excellent wave electricity devices, but Karbon, how do you suppose you get the water up there? The wind is free? Balloons? We properly used to envision skyhooks, and if I had one now. . . .

Well, here's where good

Well, here's where good research comes into play. WATER is not a greenhouse gas, it is a liquid. WATER VAPOR is water in its gaseous form. Water vapor makes up about 3% of our current atmosphere, which is around 75 times the amount of carbon dioxide, which makes up about .04% of it. It is also more than methane (I'm not sure of the current level of methane, but a quick search would probably tell you). And yes, water vapor is a greenhouse gas.

H2O is not a "greenhouse gas"

I agree with Idlewild that water is not a greenhouse gas but CO2 and methane definitely are. I think the way this idea is supposed to work is by forming a reflective shield of vapory cloud over large ocean surfaces and thus reflecting some of the sunrays back like a "mirror." When the hot rays of sun are reflected back into space before they reach the surface of the water, the water temperature eventually starts to drop -- or at least it stops from getting any higher. That's how I think these two scientists believe this scheme might work.

Water vapor

is a greenhouse gas? I don't understand how that could be possible, I've never heard of it referred to as one before. Water is naturally present in the atmosphere, clouds, etc. The most prevalent greenhouse gas is CO2, then methane I think? I guess maybe if water vapor could contain some heat in the atmosphere, but that doesn't make it a 'greenhouse gas.'

The idea belongs to 2 scientists, John Latham and Stephen Salter

Good question, Publius. The idea has actually been first forwarded by John Latham, a scientist working for US National Center for Atmospheric Research in Colorado. And yes, Salter is also a scientist working for the University of Edinburgh. Let me quote the Economist report which explains how this crazy-sounding idea might actually work: "...blasting tiny doplets of seawater into the air would simulate the formation of highly reflective, low-lying marine cloud. Simulations suggest this would have a substantial cooling effect. The question is how to do it economically."

Global Warming would be

Global Warming would be stopped by producing more water vapor? Is Stephen Salter a scientist? If he was, he would know that water vapor is actually a greenhouse gas and that it is far more abundant than carbon dioxide. So, how would creating more water vapor help offset global warming?

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