Tag Archives | Weather
From the Daily Mail:
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People in drought-stricken countries could one day create rain clouds on demand thanks to laser technology. Physicists have discovered that firing short laser bursts into the air can trigger the formation of water droplets. The breakthrough technique could help stimulate rainfall in the future.
Scientist Jerome Kasparian and his team from the University of Geneva wanted to find a more environmentally friendly alternative to cloud seeding. This 50-year-old process attempts to artificially induce showers. A red laser pulse ionises the air and triggers the condensation of water droplets to create a cloud, which is illuminated by a green laser
Rockets carrying silver iodide particles are scattered in the sky. The particles act as ‘condensation nuclei’ around which water drops can form. Dr Kasparian said cloud seeding is not an efficient method despite decades of development. He added: ‘There are also worries about how safe adding silver iodide particles into the air is for the environment.’
The researchers realised laser technology could be used to create an alternative technique.
For residents of a small Australian town, their usually mundane conversations about the weather have just become a whole lot more interesting. That's because in the outback town of Lajamanu it's started raining fish. Yes, fish. Hundreds of them, falling from the sky. Over the past two days the town's 660 residents have been bombarded with small white fish which have been falling like rain. Locals say the fish, mostly spangled perch, have even been alive as they hit the floor. Lucky it wasn't crocodiles then. Meteorologists believe the fish where sucked up by a tornado — which passed over a river some 300 miles away — before being carried through the sky at 40,000 to 50,000 feet.
By Michel Chossudovsky for the Centre for Research on Globalisation:
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The term “environmental modification techniques” refers to any technique for changing – through the deliberate manipulation of natural processes – the dynamics, composition or structure of the Earth, including its biota, lithosphere, hydrosphere and atmosphere, or of outer space. (Convention on the Prohibition of Military or Any Other Hostile Use of Environmental Modification Techniques, United Nations, Geneva: 18 May 1977)
“Environmental warfare is defined as the intentional modification or manipulation of the natural ecology, such as climate and weather, earth systems such as the ionosphere, magnetosphere, tectonic plate system, and/or the triggering of seismic events (earthquakes) to cause intentional physical, economic, and psycho-social, and physical destruction to an intended target geophysical or population location, as part of strategic or tactical war.” (Eco News)
“[Weather modification] offers the war fighter a wide range of possible options to defeat or coerce an adversary… Weather modification will become a part of domestic and international security and could be done unilaterally… It could have offensive and defensive applications and even be used for deterrence purposes.
From The Independent:
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Recently both Russia and China have claimed to be able to use cloud seeding to increase rainfall and snowfall, or change the location of where it falls. In the past, snow-making experiments have been carried out in North American ski resorts in the past with little evidence of success. So how have the Russian and Chinese scientists achieved this feat and what evidence is there that it is in fact due to cloud seeding?
The seeding method used is to add tiny particles of silver iodide to the clouds and there is solid science behind this method. At temperatures a few degrees below zero degrees centigrade, clouds consist mainly of supercooled water droplets. These clouds can be quite stable, but silver iodide has an ice-like structure and it will cause a few of these water droplets to freeze. Once you have ice particles mixed in with the supercooled droplets, these crystals grow rapidly to form snowflakes, causing the cloud to precipitate.