11 Aug '12, 11pm

River Outflow to the Kara Sea: The Ob and Yenisei Rivers wash sediment and dissolved plant matter into the Arcti...

River Outflow to the Kara Sea: The Ob and Yenisei Rivers wash sediment and dissolved plant matter into the Arcti...

When rivers flow to the sea, they usually carry sediment and dissolved organic material —dead and decaying plant material—with them. The question for many Arctic researchers is how does that flow change from season to season, and how might it accelerate as far northern latitudes grow warmer. The Ob and Yenisei Rivers in north-central Russia are among the larger rivers that drain into the Arctic Ocean, though past research suggested that they do not necessarily carry as much organic matter and sediment as other rivers. The Moderate Resolution Imaging Spectroradiometer (MODIS) aboard the Aqua satellite acquired this image of the rivers as they dumped tan sediments and dark brown dissolved organic material (DOM) into the Kara Sea on June 29, 2012. Note that the image is rotated to face southeast, such that the North Pole is off the bottom of the image. Though the exact amount...

Full article: http://earthobservatory.nasa.gov/IOTD/view.php?id=78829&s...

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