• MODIS Pic of the Day 28 October 2022

    From Dan Richter@1:317/3 to All on Fri Oct 28 12:00:12 2022
    October 28, 2022 - Mississippi River Delta

    Delta
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    On October 26, 2022, the Moderate Resolution Imaging Spectroradiometer
    (MODIS) on board NASA’s Aqua satellite acquired a true-color image of
    the Mississippi River and Delta in Louisiana on a sunny autumn day. The
    curving course of the mighty river can be seen twisting through fall
    fields that are tinted gold and tan. Major cities, such as New Orleans,
    appear to be colored gray. Sediment swirls in Lake Ponchartrain just
    north of New Orleans and pours into the Gulf of Mexico through channels
    in the Mississippi Delta.

    Water levels in the Lower Mississippi River cycle through the year,
    with the highest levels (often accompanied by flooding) occurring in
    springtime as spring rains along the entire basin and snowmelt in the
    north combine to fill the river. After summer’s heat dries the
    Mississippi Basin, water levels in the Lower Mississippi River
    typically drop by fall. This year, driven by an extremely warm summer
    upstream and Moderate to Severe Drought (D1-D2) registered through most
    of the state of Louisiana, water levels have dropped to levels not seen
    since 2012, according to the National Weather Service (NWS).

    On October 18, the NWS Lower Mississippi River Forecast Center (LMRFC)
    reported that preliminary data showed some locations along the river
    from Cairo, Illinois to Memphis, Tennessee had broken modern-day
    low-level records. Memphis registered -10.7 feet, with a forecast for
    the river to reach a low of -11.1 feet.

    Low water levels in the Lower Mississippi River have allowed salty
    water from the Gulf of Mexico to push up the Delta and upriver into the
    Mississippi River, threatening water supplies. To prevent saltwater
    from getting farther upstream, the Corps began construction on an
    underwater sill in Myrtle Grove, Louisiana, on October 11.

    Image Facts
    Satellite: Aqua
    Date Acquired: 10/26/2022
    Resolutions: 1km (29.3 KB), 500m (101.7 KB), 250m (312.1
    KB)
    Bands Used: 1,4,3
    Image Credit: MODIS Land Rapid Response Team, NASA GSFC



    https://modis.gsfc.nasa.gov/gallery/individual.php?db_date=2022-10-28

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