Weather Modification

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weather modification

[′weth·ər ‚mäd·ə·fə′kā·shən]
The changing of natural weather phenomena by technical means; so far, only on the microscale of condensation and freezing nuclei has it been possible to exert modifying influences.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Weather Modification


a group of measures taken to change the climate in a way that is useful to humans (for example, to improve the living conditions of the population in a particular region or to develop particular sectors of agriculture). At the present level of science and technology, weather modification can only be carried out over comparatively small areas, involving primarily the layer of the atmosphere next to the ground.

Weather modification plans for significant areas envision either direct influence on the atmosphere by technical means or a change in the geographic factors that influence the processes of climate formation. Examples of such projects are dusting of the upper layers of the atmosphere to change the heat exchange between the earth and space, the use of atomic energy to affect the general circulation of the atmosphere, the construction of dams to change the behavior of ocean currents, and the breakup of polar ice. Some of these projects will be technically feasible in the near future. However, at the present level of development of science, all the possible consequences of the particular interventions in the processes of climate formation cannot be foreseen. Therefore, the existing climatic conditions on earth must be preserved, and the tendency of human intervention in natural processes to worsen them must be limited.


Budyko, M. I. Klimat i zhizn’. Leningrad, 1971.
Budyko, M. I. Vliianie cheloveka na klimat. Leningrad, 1972.
Berliand, M. E., and K. la. Kondrat’ev. Goroda i klimatplanety. Leningrad, 1972.


The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
Cloud seeding, a type of weather modification, aims to change the amount or type of precipitation in the clouds through the method of sprinkling chemicals into the air.
As the founder of SPEC Incorporated and a renowned participant in over 50 international research projects related to weather modification, Dr.
Cloud seeding is a weather modification method where chemical "nuclei" such as silver iodide or calcium chloride are introduced in the atmosphere to induce condensation, and eventually, precipitation.
In the quote in question, the US Air Force admits that: "Weather modification will become a part of domestic and international security and could be done unilaterally ...
Cloud seeding is a type of weather modification that aims to change the amount or type of precipitation that falls from clouds by dispersing substances into the air and alter the microphysical processes within the cloud.
In addition, a session on Applied Rain Enhancement Research discussed a recent landmark report on cloud seeding published by the WMO Expert Team on Weather Modification.
Cloud seeding, a form of weather modification, is a way of attempting to change the amount or type of precipitation that falls from clouds, by dispersing substances into the air that serve as cloud condensation or ice nuclei, which alter the microphysical processes within the cloud.
The National Research Council stated that targeting seedable clouds with silver iodide (AgI) in complex terrain is a high priority research item for the weather modification community [1].
"Most of man's inadvertent weather modification has resulted from pollution of the atmosphere by discharges from his technological establishment.
Weather modification is actually nothing new for China.
The objectives and methods of weather modification are distinctly different than those of climate manipulation.