Extreme rainfall: More accurate predictions in a changing climate

To limit the impacts of climate change it is essential to predict them as accurately as possible. Regional Climate Models are high-resolution models of the Earth's climate that are able to improve simulations of extreme weather ...

India braces for powerful cyclone amid deadly virus surge

A powerful cyclone roaring in the Arabian Sea was moving toward India's western coast on Monday as authorities tried to evacuate hundreds of thousands of people and suspended COVID-19 vaccinations in one state.

Volcanic eruptions, hurricanes affect rainfall on Hawai'i Island

To better understand how and where groundwater is recharged on Hawaiʻi Island, a team of earth and atmospheric scientists from the University of Hawai'i at Mānoa looked to the source—rainfall. In a published study, the ...

A new method to trigger rain where water is scarce

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 ...

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Rain

Rain is liquid precipitation. On Earth, it is the condensation of atmospheric water vapor into drops heavy enough to fall, often making it to the surface. Rain is the primary source of fresh water for most areas of the world, providing suitable conditions for diverse ecosystems, as well as water for hydroelectric power plants and crop irrigation. However, not all rain reaches the surface; some evaporates while falling through dry air. This is called virga, a phenomenon often seen in hot, dry desert regions. The METAR code for rain is RA.

Rain is also known or suspected on other worlds. On Titan, Saturn's largest moon, infrequent methane rain is thought to carve the moon's numerous surface channels. On Venus, sulfuric acid virga evaporates 25 km from the surface. There is likely to be rain of various compositions in the upper atmospheres of the gas giants, as well as precipitation of liquid neon and helium in the deep atmospheres.

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