May 6, 2023 - Frozen Lakes in Manitoba

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The province of Manitoba, Canada has been called “the land of 100,000
lakes” and on May 4, 2023, most of the many lakes and ponds remained
covered in ice.

On that same day, the Moderate Resolution Imaging Spectroradiometer
(MODIS) on board NASA’s Terra satellite acquired a true-color image of
Lake Winnipeg, said to be the 12th largest freshwater lake on Earth,
and several surrounding lakes. To the west of northern Lake Winnipeg,
sits Lake Winnipegosis and Lake Manitoba stretches south of
Winnipegosis. Together, Lakes Winnipeg, Winnipegosis, and Manitoba are
often referred to as Manitoba’s Great Lakes. The lakes are surrounded
by wetlands and forest (dark green) and prairie or grasslands (light
tan) and are covered with bright white ice.

The origins of the lakes and surrounding wetlands can be traced to the
last ice age. The wetlands were created in the low-lying topography
ground down by the advancing and retreating ice sheets. The three
Manitoba Great Lakes, however, are actual remnants of glacial Lake
Agassiz. This was an ice-dammed lake that formed south of the
Laurentide Ice Sheet about 14,500 years ago. At its largest, Lake
Agassiz was 1,125 kilometers (700 miles) long and 400 kilometers (250
miles) wide. As the ice dams melted and receded at the end of the ice
age, about 8,000 years ago, outlets to the sea opened and the lake
drained, leaving behind the deeper lakes.

Image Facts
Satellite: Terra
Date Acquired: 5/4/2023
Resolutions: 1km (580.2 KB), 500m (1.5 MB), 250m (3 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=2023-05-06

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