December 12, 2021 - Ice forming on Hudson Bay
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On December 9, 2021, the Moderate Resolution Imaging Spectroradiometer
(MODIS) on board NASA’s Terra satellite acquired a true-color image of
ice forming off the north-western shore of Hudson Bay. Fast ice clings
to the shore and extends for more than 90 miles (145 km) eastward over
the blue waters of the Bay.
Each winter, as daylight decreases and temperatures plummet, Hudson Bay
freezes over. Ice-up typically begins by mid-November and tends to
proceed rapidly. This year, despite earlier-than-average ice-up over
much of the Arctic, the start of ice formation on Hudson Bay has been
delayed by a few weeks, mostly likely due to lingering warm
temperatures. Once frozen, Hudson Bay becomes a key habitat for
migrating polar bears, which spend much of their time on the ice until
it starts to melt again around June.
Image Facts
Satellite: Terra
Date Acquired: 12/8/2021
Resolutions: 1km (870 KB), 500m (2.4 MB), 250m (1.9 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=2021-12-12
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