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R
rams.atmos.colostate.edu
research
https://rams.atmos.colostate.edu/gkss_node4.html
One method of seeding clouds to enhance precipitation is to introduce hygroscopic particles (salts) which readily take on water by vapor deposition in a supersaturated cloudy environment. Observational and modeling studies provide further support that at least in some clouds, the addition of hygroscopic seeding material can broaden drop-spectra and at least hasten the onset of precipitation formation. We concluded that `` there appears to be a real opportunity to enhance rainfall through hygroscopic seeding in some clouds. Thus there probably exists a spectrum of clouds between these two extreme types that have enough liquid water to support a warm cloud precipitation process that can be accelerated by hygroscopic seeding. As optimism for significant precipitation enhancement by static seeding of supercooled clouds has waned, enthusiasm for the potential of hygroscopic seeding has grown. Seeding trials with this system suggested that the pyrotechniques produced a cloud droplet spectrum that was broader and with fewer numbers, which would be expected to increase the chance for initiation of collision and coalescence processes.
C
cloud-seeding-technologies.com
article
https://www.cloud-seeding-technologies.com/applications/
## How we Seed the Clouds. Cloud Seeding is a scientifically validated method of weather modification, involving the controlled dispersion of seeding materials into clouds. These techniques offer versatility, allowing for the augmentation of precipitation (rain or snowfall) within targeted areas, as well as hail suppression and fog dispersion. Our product range caters to diverse scenarios, enabling application within both warm and cold cloud environments. Cloud seeding in cold clouds. Cloud seeding in warm clouds. ### Cloud Seeding Application. ### Cloud-Top Seeding by Aircraft. This extremely effective all-weather method uses light aircraft to transport BIP and ejectable flares, and aerosol generators above into the cloud to release seeding materials along the flight path. ### Areal Cloud-Base Seeding. This widely successful method uses Cloud Seeding Aircraft or Smart Cloud Seeding Drones to deliver seeding materials to the updrafts that feed the clouds where the particles are naturally dispersed. ### Ground-based Cloud Seeding.
D
dri.edu
research
https://www.dri.edu/cloud-seeding-program/what-is-cloud-seeding/
## What is Cloud Seeding? Illustration on how cloud seeding works with silver iodide rising into the clouds and resulting in ice crystals that grow large enough to fall as snow. ## How we Cloud Seed. Most cloud seeding operations, including those run by DRI, use a compound called silver iodide (AgI) to aid in the formation of ice crystals. When storm systems move through one of our cloud seeding project areas, a solution containing a small amount of silver iodide is burned from ground-based generators or released from aircraft. Cloud seeding is used all over the world as a method for enhancing winter snowfall and increasing mountain snowpack, supplementing the natural water supply available to communities of the surrounding area. At a study site in the Snowy Mountains of New South Wales, Australia, a five-year cloud seeding project designed by DRI resulted in a 14 percent increase in snowfall across the project area.
A
ametsoc.org
article
https://www.ametsoc.org/ams/about-ams/ams-statements/archive-statements-of-th…
## Planned Weather Modification through Cloud Seeding. One tool available for mitigating some of these weather impacts is planned weather modification through cloud seeding. Planned weather modification programs benefit from a comprehensive understanding of the physical processes responsible for desired modification effects. Recent improvements in the composition and techniques for dispersion of seeding agents, observational technology, numerical cloud models, and in physical understanding of cloud processes permit ever more detailed design and targeting of planned weather modification effects, and more accurate specification of the range of anticipated responses. Rigorous attention to evaluation of both operational and research programs is needed to help develop more effective procedures and to improve understanding of the effects of cloud seeding. Weather modification techniques other than cloud seeding have been used in various areas of the world for short periods of time to achieve goals similar to those of cloud seeding. 1) Efforts should continue to improve understanding of the targeted cloud and precipitation processes in planned modification.
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gao.gov
official
https://www.gao.gov/products/gao-25-107328
* Federal reporting requirements may not include all information necessary to adequately monitor cloud seeding. 23) *For example, NOAA could use its existing authority to work with other government entities, researchers, and operators to update required data for reporting, and make changes to improve standardization of annual reports.* | * Better quality and transparency of information would improve broad understanding of cloud seeding. 24) *For example, government entities, industry associations, scientific societies, researchers, and operators could promote awareness of the distinction between long-term climate or geoengineering applications and short-term cloud seeding to alter local precipitation.* | * Better understanding of definitions and differences can inform debate about potential risks and benefits of cloud seeding. This report discusses (1) the emerging and current technologies for cloud seeding (and weather modification generally), (2) the potential benefits of cloud seeding, (3) challenges surrounding the use and development of cloud seeding, and (4) policy options that may help address challenges or enhance benefits of cloud seeding.
E
en.wikipedia.org
article
https://en.wikipedia.org/wiki/Cloud_seeding
Based on its findings, Stanford University ecologist Jerry Bradley said: "I think you can squeeze out a little more snow or rain in some places under some conditions, but that's quite different from a program claiming to reliably increase precipitation." Data similar to that of the NAS study was acquired in a separate study conducted by the Wyoming Weather Modification Pilot Project, but whereas the NAS study concluded that "it is difficult to show clearly that cloud seeding has a very large effect", the WWMPP study concluded that "seeding could augment the snowpack by a maximum of 3% over an entire season.". In 2016, Jeff Tilley, director of weather modification at the Desert Research Institute in Reno, claimed that new technology and research has produced reliable results that make cloud seeding a dependable and affordable water supply practice for many regions. **^** "Weather Modification Association (WMA) Position on the Environmental Impact of using Silver Iodide as a Cloud Seeding Agent" (PDF).
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ars.usda.gov
official
https://www.ars.usda.gov/oc/dof/seeding-the-skies-harvesting-rain/
Researchers at ARS are developing a revolutionary technique of seeding clouds to produce more rain, in cleaner, less costly ways.
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news.climate.columbia.edu
research
https://news.climate.columbia.edu/2025/07/17/geoengineering-cloud-seeding/
# Need To Know: Geoengineering and Cloud Seeding. No comments on Need To Know: Geoengineering and Cloud Seeding. Techniques to deliberately alter Earth’s climate, such as geoengineering and cloud seeding, have been in the news following the devastating floods in Texas. Lamb, an associate research scientist in the Department of Earth and Environmental Engineering at Columbia University, introduces the science underlying geoengineering and weather modification and discusses their implications for future climate mitigation strategies. Another set of methods, referred to under the umbrella of Solar Radiation Management (SRM), aim to increase the reflection of sunlight from the Earth’s atmosphere in order to cool the Earth’s climate. The most studied of these methods is stratospheric aerosol injection, which proposes to put sulfate aerosols high up in the Earth’s atmosphere to cool the climate (this is similar to the cooling effect that is observed after a large volcanic eruption, such as Mount Pinatubo in 1991). atmospheric science, climate change, cloud seeding, geoengineering, Kara D.