Static cloud seeding is the most common technique. Here, an aircraft sprays a chemical solution — usually silver iodide — into the clouds. The
# 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.
Cloud seeding is used to increase rain, or snow, it can also reduce the risk from hail, cloud seeding is used to disperse fog and some kinds of pollution. Cloud
## 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.
## 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.
Cloud seeding is a physical process/Fundamentals/Chemical_Change_vs._Physical_Change) whereby a seeding agent comprised of minute particles is released into an **EXISTING** cloud formation with Supercooled Liquid Water (SLW). A seeding agent, most commonly Silver Iodide (AgI), is then released into the existing storm cloud by an aircraft and/or by ground-based generators. The Seeded and Natural Orographic Wintertime clouds: the Idaho Experiment (SNOWIE) utilized a full outfitted weather research aircraft to fly directly into clouds and release silver iodide plumes to detect and measure the impacts of seeding. An aircraft flies either through or above an ACTIVE storm cloud releasing a seeding agent (Silver Iodide) into the cloud that has favorable conditions for ice crystal formulation. Cloud seeding is the process of inputting a solid particle (nucleus) into an EXISTING cloud formation, that liquid water can formulate ice around, and essentially deplete the cloud by turning its water content into ice.
Cloud seeding is a form of planned weather modification. Most commonly used to increase precipitation as a drought management technique, cloud
* 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.