Hawaii seen from the International Space Station

Hawaii seen from the International Space Station

Crews aboard the Worldwide House Station oriented the digicam particularly to seize this panorama of Hawaii’s Kilauea volcano (picture left) with the lengthy swirls of volcanic gases (high half of the picture) wafting west from the volcano. Astronauts are educated to take indirect photographs of hard-to-see atmospheric haze by capturing obliquely to boost visibility. The gasoline haze–termed vog, a mixture of fog, smog and volcanic–is well-known in Hawai’i, and is outlined as “a type of air air pollution that outcomes when sulfur dioxide and different gases … emitted by an erupting volcano react with oxygen and moisture within the presence of daylight”.

Right here the vog haze is transported a whole bunch of km downwind of the volcano (for scale the Massive Island is 137 km, 85 miles, lengthy). On this uncommon view the vog types a sequence of delicate however distinct alternating swirls (arrows) generally known as von Karman vortices, a favourite subject for crew images. Swirls kind underneath particular circumstances of excessive atmospheric stress and comparatively sluggish wind speeds. They often develop in clouds downwind of islands, as proven in lots of astronaut photographs of cloud patterns. Photographs of vog haze are captured typically by astronauts, however few present the swirl phenomenon.

Picture Credit score: NASA
Clarification from: https://eol.jsc.nasa.gov/SearchPhotos/photograph.pl?mission=ISS042&roll=E&body=281151

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