It’s not successful because dynamics and physics controlling precipitation are very complex. Precipitation is determined by large scale processes whereas cloud seeding is a microscale process operating within a single cloud.
Well,
The blue water (artificial rain) can be replaced by green water (the water required for agriculture), because the cost of the artificial rain drop is high and these costs can be replaced by importing agricultural products (green water).
Regards
The problem of assessing the effectiveness of different strategies used to control rainfall is very old and complex. Before I embark on a technical debate, I believe that the natural approach suggested in the project: Cooling the planet with revegetation (posted on the Research Gate by Craig Carlton Dremann) should be given our full attention. Maybe the best solution is simpler than we expected.
Janusz Pudykiewicz
I think a scientific deba regarding cloud seeding and artificial rain enhancement is worth a lengthy discussion by experts in this field
Whether it is artificial or natural rain, the local atmosphere should hold water vapor to condense. If the drought area does not have enough moisture to condense, no effort works to form rain. :))
Dear Janusz Pudykiewicz ,
Talking about temperature and the moisture in the atmosphere, the revegetation is fine, but it is also a scientific debate in terms of air pollution. It may, in the worst, exacerbate the air pollution because of the present anthropogenic emissions and their interaction with biogenic emissions.
Dear Kishore Ragi
I agree with your opinion, but please note that a significant number of pollution events in many parts of the world are caused by wind-blown sand particles. This cause could be eliminated by new vegetation.
Dear Janusz Pudykiewicz ,
Just because of wind-blown sand particles which usually big enough to not-much-causing health issues, we should not risk our life with detrimental PM2.5 and ground level ozone,which are potentially formed due to biogenic emissions. However, it is noted that the biobenic emissions are not always forming the said pollutants; sometimes the ozone levels may decrease as well depending on the anthropogenic emissions. We are still progressing in the research because of lack of observations of biogenic emissions and of their interaction with anthropgenic emissions. Therefore, until we are confident on this, we can't say that the plants are going to help us. However, my hypothesis is that we have to plan to select a right place to plant in such as way reducing the air pollution, but it happens down the road.
Dear Kishore Ragi
The problem is more general because it is related to the coordination of land management and precipitation control. The traditional air quality element comes last in this scheme (but not least). The dust storms are probably one of the most devastating manifestations of the desertification process
https://en.m.wikipedia.org/wiki/2018_Indian_dust_storms
Modification of precipitation by revegetation is still being debated but we should remember about other techniques. It is also clear that the solution requires extensive international cooperation.
Artificial rain is simply hoax, it never succeeded anywhere, and that’s why we do not hear much about it anymore. Revegetation or reducing surface albedo, unless carried on a grand scale, are not effective to enhance precipitation.
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