ThomasEdwardMiller
What if brightening clouds causes them to heat up less and rise less and reduce rain? I say, rather than brighten clouds, make more clouds. Here is my Rain Enhancement Steam Grid idea. Contrary to what many believe, there is a lot of moisture in hot fairly dry desert air. The weather report says that at 17h00 Monday 24 July the humidity in Cairo will be 30% and the temperature will be 37 deg C. This air will hold about 13 grams of water vapour in each cubic metre. If the temperature was 15 deg C and the relative humidity was 95% the air would hold only about 12 grams of water vapour per cubic metre. When air cools the relative humidity increases and the weather report says that at 23h00 on Monday 24 July the relative humidity in Cairo will be 65% and the temperature will be 29 deg C. Now if you heat air with a high relative humidity it does not have to rise far before clouds form. If you heat low relative humidity air, it has to rise high before clouds form and you have to heat it a lot to get it to rise so far. So here is the idea: Wait until the air cools and RH is high and then heat air a little to get it to rise and form clouds. My method to heat it is to have pipes with heated water containers at the ends and with holes in the pipes to let steam out. This will humidify and heat the air. Example. The weather report says that in Cairo on 28 July 2017 at 04h00 the RH will be 86% and the temperature will be 26 deg C. Using Espy's equation, if this 26 deg C air is heated to 28 deg C it only needs to rise 321 metres for clouds to form. By virtue of its temperature (T=28 deg C) it could rise 606 metres. So it can easily reach the height needed for clouds to form (used general sorts of lapse rates). I think it is an excellent idea to make clouds over the ocean, but not necessarily brighter clouds. By making spray clouds over the ocean one prevents a huge amount of energy being absorbed because most of the solar energy is absorbed by oceans and most of the energy falling on water is absorbed by it. Clouds absorb infrared readily and the clouds will absorb and evaporate. This will create more moisture (raise relative humidity) which is again a good thing as it helps prevent droughts. It will also help produce more clouds.
windykites
The article does not mention the subject of Chemtrails. High altitude planes appear to be spraying chemicals into the skies all over the world. The trails expand and last for many hours, eventually veiling the sky from horizon to horizon. There are plenty of photos online. I have a personal collection.
Brian M
@windykites - Yes the dimming effect, although not sure if that is the best way to solve the problem!
Perhaps an easier option is reducing the greying of Antarctic ice by micro organisms or consider whitening ground areas, roofs etc. to reflect light.
Always dangerous to tweak the natural process (as we have done), but global warming (and cooling) will happen eventually (as it has done in the past) without human intervention anyway, so maybe we will need to employ geoengineering some time in the future anyway!
highlandboy
The solution proposed would need to be implemented so that the saline solution does not precipitate on land. Rising salt and irrigation induced salinity is allready a problem in many areas whithout starting salary rain.
fen
Perhaps we need to mandate cities to be more reflective. Most of the "heating" of the world that humans seem to see, is jut because they are in a city and cities are local hotspots.
If we make a real effort to turn to hydrogen made with green energy, carbon instead of aluminum in our cars, graphene in our chips instead of hard to mine materials, our cities reflecting the heat back... well I think we could go right to the edge of the world failing and save it.
Bob
Actually after 9/11 when most air traffic was grounded for several days, there were some studies made on significant temperature fluctuations due to the lack of contrails in the sky. I attempted to interest Richard Branson and a major airline in a jet fuel additive for day and night time global routes to take advantage of the contrail reflectivity and the effect it could have on global temperatures. Unfortunately, no one was interested. The vaporizing of sea water or trying to brighten clouds sounds interesting but would require a great investment and consumption of energy. My idea would have cost little and the planes would be flying the global routes anyway whether or not they used the additive. It would only take small deviations in the global routes and flying altitudes to increase the area covered and enhance its effects. Eventually, someone with money and influence will pick up on the idea. and make a fortune.
watersworm