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Wednesday, January 17, 2018

Green Antarctica: satellite photos


The green Antarctica from space has made the satellite “Landsat-8”, the website of NASA. The satellite is captured in a frame of Granite harbour, Antarctica, Bay near the Ross sea. Photographs show views of the Bay, covered with green sludge.

Sludge— loose accumulations of the substance in normal conditions has a liquid state. Depending on the amount of ice slush can flow as a liquid, or to lose this ability due to the emergence of congestion.

Australian glaciologist Jan Lieser believes that the green color is caused by phytoplankton on the surface. These microscopic marine plants, micro-algae typically begin to bloom in the waters around Antarctica during the southern hemisphere spring comes. The edge of the sea ice recedes, there is enough sunlight, which contributes to the appearance of plankton. However, scientists have noticed that sometimes this can occur and autumn.

Sea ice, wind, sunlight, availability of nutrients and predators are factors that determine whether the increase plankton and stained with the sludge, making it visible from space.
source

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