Visitors to the Athabasca Glacier in British Columbia are provided a some interpretive information, including these small signs that represent where the end of the glacier extended to, at various years in the past. This demonstrates the retreat of the glacier as it melts, and leaves a powerful impression.
Here is the text from the signs that a visitor will encounter if the walk to the glacier on the designated route:
"A World Heritage Site
Jasper, Banff, Yoho and Kootenay national parks belong to a Canada-wide family of national parks. These four parks, along with Mr. Assiniboine, Hamber and Mt. Robson provincal parks, also make up the Canadian Rocky Mountain Parks World Heritage Site, a 23,069 km2 tract of wilderness protected for all people...for all time.
The Athabasca Glacier and The Columbia Icefield
Parks Canada"
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"Athabasca Glacier forefield trail
Length 1 kilometre
Elevation change 30 metres
Hiking time 20 minutes down, 25 minutes up.
forefield trail
The forefield trail passes through an area that, less than 100 years ago, lay beneath the glacial ice. From the trail there are excellent views of the Athabasca Glacier and the landscape it has sculptured.
Sturdy shoes and a jacket are recommended for crossing this rocky, breezy terrain.
The few plants that have gained a foothold here live a harsh life. Please help to protect them and the area by staying on the trail."
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The coordinates of each of the markers, by year:
Year/coordiates
1890 N 52° 13.098 W 117° 13.488
1908 N 52° 13.056 W 117° 13.579
1925 N 52° 13.027 W 117° 13.679
1935 N 52° 12.926 W 117° 13.811
1942 N 52° 12.865 W 117° 13.843
1948 N 52° 12.832 W 117° 13.878
1982 N 52° 12.591 W 117° 14.002
1992 N 52° 12.519 W 117° 14.025
2000 N 52° 12.514 W 117° 14.129
My GoogleEarth calculation as of 2011: N 52° 12.484 W 117° 14.147
(not scientific, but a rough measurement)
According to one website, the Athabasca Glacier has retreated 1,500 m (4,900 ft) since the late 19th Century, and the retreat has been speeding up since 1980. It has lost over half of its volume.
Sources:
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