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Satellite Eye on Earth: November and December 2017 - in pictures

Winter solstice, night lights and interesting islands are among the images captured by Nasa and the ESA last monthDust blowing out of the Copper River valley on Alaska's south coast. The dust plume was likely comprised of fine-grained loess, which was formed as glacial ice moved over the area and ground the underlying rock into a powder. Dust storms in southern Alaska generally occur in late autumn, when river levels are relatively low, snow has not yet fallen, and the layers of dried, loess-rich mud are exposed to the wind. The Copper River - named for ore deposits found upstream - drains an area of more than 24,000 square miles (62,000 square kilometres) and is, by volume of discharge, the 10th largest river in the United States. Its delta forms one of the largest and most productive wetlands on the Pacific Coast of North America. Continue reading...
Zdroj: The Guardian

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