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File:Glacial dust streams into the Gulf of Alaska (NESDIS 2017-11-16).png

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The NOAA/NASA Suomi NPP satellite’s VIIRS instrument captured this plume of glacial dust streaming into the Gulf of Alaska from the Copper River Valley.

Summary

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Description
English: The NOAA/NASA Suomi NPP satellite’s VIIRS instrument captured this plume of glacial dust streaming into the Gulf of Alaska from the Copper River Valley. As glaciers flow, they grind against underlying bedrock, which produces a very fine powder known as “glacial flour” or “rock flour.” Rich in iron, this silty substance often flows into rivers and lakes, giving the water a brown or grey tinge. When water levels are low, the flour dries out on riverbanks and deltas. Winds then lift the dust into the air and can transport it over several hundred miles of open ocean. Researchers are using satellite data to better understand how glacial dust events in the Gulf of Alaska can trigger phytoplankton growth, which affects marine ecosystems in the region.
Date 16 November 2017 (upload date)
Source Glacial dust streams into the Gulf of Alaska
Author NOAA

Licensing

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Public domain
This image is in the public domain because it contains materials that originally came from the U.S. National Oceanic and Atmospheric Administration, taken or made as part of an employee's official duties.

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current15:57, 2 June 2024Thumbnail for version as of 15:57, 2 June 20241,920 × 1,080 (1.09 MB)OptimusPrimeBot (talk | contribs)#Spacemedia - Upload of https://nesdis-prod.s3.amazonaws.com/2021-06/2141v1_20171116-CopperRiver.png via Commons:Spacemedia

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