Astronaut Alex Gerst captured from ISS the Amazon River mouth.

Credit: Alex Gerst, ESA, NASA

The Amazon River in South America is the largest river by discharge volume of water in the world, and either the longest or second longest. The image clearly shows sediments discharged by the river are laid up at the mouth of Amazon River. Including the Pará river and the Marajó island ocean frontage, the Amazon estuary is 325km wide. The plume generated by the river’s discharge covers up to 1.3 million km2 and is responsible for muddy bottoms influencing a wide area of the tropical north Atlantic in terms of salinity, pH, light penetration, and sedimentation. Moreover, clouds formed over rainforest land is created from water vapor evaporated due to heat can be seen in the image.

The local scenery on the ground is as follows.


Reference: Alex Gerst’s Tweet
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