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From: Dan Richter (1:317/3)
To: All
Date: Thu, 22.04.21 13:00
MODIS Pic of the Day 22 April 2021
April 22, 2021 - Snow-capped Mountains of British Columbia


British Columbia

Canada’s Coast Mountains stretch about 1,000 miles (1,600 km) from
Yukon, Alaska, USA to the Frasier River in Southern British Columbia,
Canada. They are a part of the massively long “American Cordillera”—a
group of peaks that run along western North America, Central America,
and Antarctica.

Snow is a prime feature of the Coast Mountains, accumulating along the
entire range, both peaks and valleys, in the wintertime. Snow depth,
moisture content, and other characteristics are the result of many
climate features, including air temperature, wind, atmospheric
moisture, precipitation amounts, and storm frequency. As spring arrives
and temperatures warm, the snowpack begins to melt, feeding rivers and
streams and providing vital water to surrounding regions, filling lakes
and water reservoirs, irrigating agricultural land, and providing for
other needs of humans and the ecosystem.

On April 20, 2021, the Moderate Resolution Imaging Spectroradiometer
(MODIS) on board NASA’s Terra satellite acquired a true-color image of
the Coast Mountains north of the island of Vancouver. The ecoprovinces
recognized by British Columbia that are captured in this image include
Coast and Mountains (west), the Central Interior (north), and the
Southern Interior. While substantial snow remains on the highest
elevations, spring melting is well underway with many valleys in the
interior snow-free, especially in the Southern Interior. Some lakes in
the Central Interior, however, remain ice-covered.

According to British Columbia’s Environmental Reporting BC webpage,
snow depth and the water content of snow both significantly decreased
in three of B.C.’s ecoprovinces between 1950 and 2014. Snow depth and
snow water content decreased at a rate of 11 and 7 percent per decade
in the Southern Interior, 10 and 5 percent per decade in the Central
Interior, and 7 and 5 percent per decade in the Southern Interior

Image Facts
Satellite: Terra
Date Acquired: 4/20/2021
Resolutions: 1km (3 MB), 500m (8.5 MB), 250m (7 MB)
Bands Used: 1,4,3
Image Credit: MODIS Land Rapid Response Team, NASA GSFC

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