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Old 11-01-2010, 04:30 PM   #1
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Arrow Cloud seeding not effective

Research by Prof. Pinhas Alpert, Prof. Zev Levin and Dr. Noam Halfon of Tel Aviv University's Department of Geophysics and Planetary Sciences has dispelled the effectiveness of cloud seeding by studying 50 years worth of collected data. Rainfall happens by chance and changing weather patterns according to Prof. Alpert. The only case where cloud seeding was seen to be effective was when it was performed on orographic clouds above mountains. These clouds have a short lifespan. Cloud seeding is used in the Sierra Mountains of California and in Wyoming to encourage rainfall over the mountains to increase water levels in reservoirs.

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Old 02-11-2011, 05:37 AM   #2
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China desperate.

On Wednesday and Thursday, 487 cloud-seeding operations had been conducted in Beijing, Tianjin, Hebei, Shanxi, Henan, Anhui and Shandong, with 1,201 rockets and 1,867 shells, according to official data.

In Beijing, 759 silver iodide rods were used Thursday to increase snowfall, Xinhua reported quoting Zhang Qiang, head of the municipal weather office, as saying.

(as they haven't had rain for over a 100 days did it just raine. The results ??? natural or man made)

Beijing, Feb 11 ; Light to moderate snowfall has brought relief to the winter wheat crops in drought-hit areas of China, where more than seven million hectares of farmland have been affected due to a lingering drought.

The snowfall occurred Thursday in the parched grain-producing provinces of Anhui, Henan, Hebei, Shanxi, Shaanxi, Shandong and Jiangsu, said Yang Guiming, chief forecaster of the National Meteorological Centre.

The southern parts of Henan province and the western and northern parts of Anhui province have received snowfall ranging from 11 mm to 23 mm, the China Daily reported.

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cloud, effective, seeding

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