Planes have sprayed a chemical named silver iodide
on rain-bearing clouds in the city.
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.
"The most common seeding material is silver iodide
(AgI), which nucleates ice particles at temperatures below about -5 A C," according to the WMO's "Peer Review Report on Global Precipitation Enhancement Activities." The process can be improved by adding common salt.
the term "silver iodine cartridge in a package of at least 20 grams" refers to the mass of the pyrotechnic material they contain, where the active ingredient of the composition is silver iodide
. these cartridges, upon burning, release active condensing cores, the number of which is a function of temperature.
An airplane owned by the KMA dispersed silver iodide
, a chemical that increases precipitation by collecting water vapor, into the clouds.
The field campaign took place in Idaho between 7 January and 17 March 2017 and employed a comprehensive suite of instrumentation, including ground-based radars and airborne sensors, to collect in situ and remotely sensed data in and around clouds containing super-cooled liquid water before and after seeding with silver iodide
For release by aircraft, silver iodide
flares are ignited and dispersed as an aircraft or drone flies through a cloud.
In UAE and other areas this is done by both ground generators and aircraft using silver iodide
. As silver is expensive, potassium iodide can be used in Pakistan.
The new climate-modification system consists of an enormous network of fuel-burning chambers high in the Tibetan mountains, which transform moist monsoon winds from south Asia into rain using a cloud-seeding agent called silver iodide
. Covering an area three times the size of Spain, it could boost the region's rainfall by up to 10 billion cubic metres a year - or about 7% of China's water consumption.
Their goal is the same: to "seed" clouds with particles of silver iodide
, a compound that freezing water vapour easily attaches to.
In the silver iodide
(AgI) Seeding Cloud Impact Investigation (ASCII) pilot project, Geerts et al.
The skies are cannoned from An-26 planes with silver iodide
or liquid nitrogen by forestry fire fighters, provoking 50 minutes of rain across a 30 kilometre area.