An astronaut on the ISS photographed the rippling clouds over an archipelago near Antarctica.
Beautiful chevron-shaped cloud patterns have been pictured stretching over the southern Indian Ocean by an astronaut aboard the International Space Station.Earth Observatory's April 16 Image of the Day, shows the strange cloud patterns splaying out like a wake around the Crozet Islands, situated roughly 1,500 miles east of South Africa and around the same distance north of Antarctica. The picture was taken on January 8, earlier this year.
These bizarre clouds are known as wave clouds, or gravity waves, according to the National Oceanic and Atmospheric Administration . Astronaut photograph ISS068-E-39246 was acquired on January 8, 2023, with a Nikon D5 digital camera using a focal length of 50 millimeters. It shows the wave clouds around the Crozet Islands in the south Indian Ocean The image has been cropped and enhanced to improve contrast, and lens artifacts have been removed.
Provided by the ISS Crew Earth Observations Facility and the Earth Science and Remote Sensing Unit, Johnson Space Center. The image was taken by a member of the Expedition 68 crew., which are fluctuations in the air formed when air moves over areas of higher ground, being forced upwards, before being pulled down again by gravity. This then results in ripples of air, rising up and down like disturbed water in a tub.
The characteristic clouds form on the cooler crests of these ripples, with the water condensing due to the lower temperatures, but evaporate again at the troughs of the ripples due to the air heating up again via adiabatic heating. This then leads to the stripy pattern of clouds as snapped from space, also known as cloud streets, stretching out like the wake of a boat in a still lake.
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