NASAのインスタグラム(nasagoddard) - 9月23日 05時13分

Dust and Clouds Dance Over the Sahara -- More dust blows out of the Sahara Desert and into the atmosphere than from any other desert in the world, and more than half of the dust deposited in the ocean lifts off from these arid North African lands. Saharan dust influences the fertility of Atlantic waters and soils in the Americas. It blocks or reflects sunlight and affects the formation of clouds. By way of the dry Saharan air layer, dust either promotes or suppresses the development of Atlantic hurricanes, an enigma that scientists are trying to sort out.

In early September 2014, it looked like this sandy landscape had changed places with the sky. The photograph above was taken by astronaut Alex Gerst on September 8, 2014, from the International Space Station. The ISS was over Libya at the time, and Gerst was looking south-southwest over a storm that stretched hundreds of kilometers across the sand seas of the Sahara.

Credit: NASA #nasagoddard

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