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Worrying about drought? Why not start by making some “cloud seeding engineering”?

This summer, the United States was hit by the most severe drought in fifty years; it has resulted in a serious declination and inflation in cereal crop supply and prices. An awareness was brought to a breakthrough projected called “cloud seeding” which was renounced a couple of months ago by the U.S. government.

The idea of cloud seeding was first developed in 1940 by U.S. chemist Vincent Schaefer. Irving Langmuir, a scientist at General Electric’s Schenectady Research Lab, did an actual experiment in 1946. By injecting substances such as dry ice (solid carbon dioxide) into the cloud, it stimulates precipitation.  The cloud seeding technology was valued priceless. More than one hundred and fifty formal programs in thirty-seven countries had tried to make this work. However, due to many interventions in climate changes and uncertainty to the amount of precipitation seeded, these researches were completely abandoned in 1983.

Cloud vs. Artificial cloud? Image from: Mitch Dobrowner

Recently, the idea of cloud seeding was brought out again. In 2008 Beijing Olympic game, clouds were seeded before the game, using rockets filled with silver iodide, to ensure total dryness at the opening ceremony. The chemical injected act as a cloud condensation or ice nuclei, which alters the microphysical processes within the cloud, leading to an increase precipitation of cloud or snow.

Aircraft in North Dakota release seeding chemicals from fitted flares. Image from: Mitch Dobrowner

According to Financial Times Magazine, there has been a project in Ohio State on this cloud seeding engineering technology. The company has been accumulating snows in between two adjoin mountains in prep for producing more spring and summer water supply. The project has only been in progress for the last two years, so the actual result has not yet been announced.

As our technology improves, there were no doubt soon be a day where human can control the amount of precipitation using cloud seeding engineering. By then, will we need the weather forecast?

YouTube Preview ImageThis video gives a demonstration of how cloud NASA do cloud seeding.

Blog post submitted by Jamie Tsai