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A new method to trigger rain where water is scarce

Phys.org/news (MAY 6, 2021)

Titre : A new method to trigger rain where water is scarce

Phys.org/news (MAY 6, 2021)

Présentation
A new method to trigger rain in places where water is scarce is being tested in the United Arab Emirates using unmanned drones that were designed and manufactured at the University of Bath. The drones carry an electric charge that is released into a cloud, giving cloud droplets the jolt they need to clump together and fall as rain.

This is one of the first times scientists have used drones in an attempt to stimulate rainfall from clouds. Established techniques for encouraging rainfall in dry countries involve low-flying aircraft or rockets dropping or firing solid particles (such as salt or silver iodide) into clouds. This is known as cloud seeding.

The drones, which are being tested as part of the UAE’s rain-enhancement science-research program, are equipped with a payload of electric-charge emission instruments and sensors. Human operators on the ground will direct them towards low-hanging clouds, where they will release their charge. Clouds naturally carry positive and negative charges. By altering the balance of these charges, it is hoped that cloud droplets can be persuaded to grow and merge, eventually producing rain.

Source  : Vittoria D’alessio, University of Bath

Annonce (Phys.org/news)

Page publiée le 23 juin 2021