• MODIS Pic of the Day 22 September 2021

    From Dan Richter@1:317/3 to All on Wed Sep 22 11:00:04 2021
    September 22, 2021 - Rio de la Plata

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    rio de la plata
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    This stunning true-color image captures the dramatic colors created by
    the mixing of muddy river water with the clear, but saline water of the
    South Atlantic Ocean. This mixing occurs in Rio de la Plata, the muddy
    estuary of the Paraná and Uruguay Rivers, which forms part of the
    border between Argentina and Uruguay. The rich estuary supports both
    capital cities of Buenos Aires, Argentina and Montevideo, Uruguay.
    These cities appear as gray pixels on the south shore and the north
    shore of Rio de la Plata. Buenos Aires is the larger city.

    The Paraná is South America’s second longest river and drains much of
    the southeastern part of the continent. The extensive delta of the
    Paraná nearly reaches across the mouth of the Uruguay River. The
    rivers’ fertile soils support extensive agriculture, including
    livestock, in the region surrounding the cities. As the rivers course
    through the landscape, they accumulate large amounts of sediment, which
    dumps into the estuary along with fresh water. The complex mixing
    pattern creates beautiful colors, with sediment floating near the
    surface appearing in shades of tan. As sediment sinks below the
    surface, the reflectivity changes and this causes the color to trend
    towards green when seen from space.

    The Moderate Resolution Imaging Spectroradiometer (MODIS) on board
    NASA’s Terra satellite acquired this true-color image on September 16,
    2021, in the waning days of winter.

    Image Facts
    Satellite: Terra
    Date Acquired: 9/16/2021
    Resolutions: 1km (239.5 KB), 500m (670.9 KB), 250m (1.4 MB)
    Bands Used: 1,4,3
    Image Credit: MODIS Land Rapid Response Team, NASA GSFC



    https://modis.gsfc.nasa.gov/gallery/individual.php?db_date=2021-09-22

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