|MadSci Network: Earth Sciences|
Hurricanes need a temperature of 80º F, 26º C, to form. Cooler waters in Hurricane Bonnie's wake caused Hurricane Danielle to dissipate: What Lies Beneath a Hurricane. http://science.nasa.gov/headlines/y2000/ast11sep_1.htm It only had to be reduced to 75º F for this to occur. Could we cover the hurricane path with chemicals to reduce temperature? Ammonium nitrate (NH4NO3) for example; 14 kg of ammonium nitrate can freeze 14 liters, 14 kg, of water: Re: Making ice without machinery http://www.madsci.org/posts/archives/jun99/929075573.Ch.r.html To reduce temperature only by 3º C, the amount can be reduced by a factor of 1/30th. However, freezing has the advantage that it would take some time for it to melt. How much NH4NO3 would be required? For freezing, the same amount as the water you wanted to freeze. To estimate, I'll use a size of the eye of 10 km across. This is an area of 100 square kilometers. The thickness depends on how quickly it melts at 26º C. Let's say 1cm thick. Then this is 10,000m x 10,000m x .01m = 1,000,000 m^3. This is 1,000,000 metric tons of water. Then it would require that amount of NH4NO3. It would require much less if you only wanted to decrease the temperature 3º C, perhaps only 30,000 metric tons for the same volume of water. However, the amount required might wind up being the same since the ammonium nitrate would have to be continually supplied. Bob Clark
Re: Could we use endothermic reactions to reduce hurricane strength?
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