Cloud seeding
AssigneeYeda Research and Development Co. Ltd.
InventorsRonit Popovitz-Biro, Michal Gavish, Leslie Leiserowitz, Meir Lahav
Life of this patent
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Abstract
Long-chain aliphatic alcohols are provided that induce nucleation of ice at temperatures within the range from -8.degree. C. to 0.degree. C., from supercooled water present as small drops and/or in the vapor state, and are useful for seeding supercooled clouds in order to augment rainfall.
Claims8
A method for induction nucleation of ice at temperatures within the range from -8.degree. C. to 0.degree. C., from supercooled water present as small drops and/or in the vapour state, which comprises contacting supercooled water with an aliphatic long-chain alcohol of the formula:
- C.sub.n H.sub.2n+1 OH
- or
- H.sub.3 C--(CH.sub.2).sub.m --R--(CH.sub.2).sub.p --OH
- where n>14 and m+p>14 and R is an unsaturated radical, an heteroatom, carbonyl or carbonyloxy.
A method for augmenting rainfall which comprises seeding supercooled clouds with an alcohol of the formula
- C.sub.n H.sub.2n+1 OH
- or
- H.sub.3 C--(CH.sub.2).sub.m --R--(CH.sub.2).sub.p --OH
- where n>14 and m+p>14 and R is an unsaturated radical, an heteroatom, carbonyl or carbonyloxy.
A method for augmenting rainfall which comprises seeding supercooled clouds with an alcohol of the formula C.sub.n H.sub.2n+1 OH, where n is an odd number greater than 14.
Dependencies are inferred from the claim text.