Forum Index > Trail Talk > From Shasta, CA to Adams to Baker, WA to Kokanee, BC to Banff, AB High Glacier Mass Loss in 2021
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jaysway
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jaysway
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PostThu Nov 04, 2021 1:13 pm 
https://blogs.agu.org/fromaglaciersperspective/2021/10/22/from-shasta-ca-to-baker-wa-to-kokanee-bc-to-banff-ab-high-glacier-mass-loss-in-2021/
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The exceptional heat of the summer of 2021 across glaciated mountain ranges of the Pacific Northwest, reduced snowcover extent from Mount Shasta, CA north to Mount Adams and Mount Baker, WA and east to Glacier National Park, MT, Kokanee Glacier, BC and Bonnet Glacier, Alberta. Here we examine late summer images to illustrate the extent of exposed bare ice and firn across glaciers in the region. For a glacier to be in equilibrium requires at least 50% to be in the accumulation zone, snow covered at the end of the summer. At the end of the summer the snowcovered area varied from 0-20% on all of the glaciers reviewed here, the snowcovered area is the accumulation area ratio. Low accumulation area ratios such as this indicate mass loss of at least 2 m w.e. in 2021 on these glaciers. That is the equivalent of losing a 2 m thick slide of ice off the surface of the entire glacier.
frown.gif

Anne Elk
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Sculpin
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PostFri Nov 05, 2021 7:32 am 
A minor tweak. The glaciers on Mount Shasta did not ablate due to the high heat of the summer of 2021. It is 95F in Weed every day in the summer every year. On the days of the heat dome, it was cooler in Weed than in Seattle. The glaciers ablated this year due to the fact that the 2020-21 rainy season precipitation in the region was 6% of normal. It was all due to the lack of snow cover. And we can already state with certainty that this scenario will not play out again next year! hockeygrin.gif

Between every two pines is a doorway to the new world. - John Muir
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Gwen
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Gwen
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PostMon Nov 08, 2021 1:56 pm 
Sculpin wrote:
And we can already state with certainty that this scenario will not play out again next year!
If there's one thing I've learned over the past decade or so it that nothing can be said with any level of certainty anymore. We seem to be having 100 year events more and more frequently with not a lot of indicators that might point to such events as being possible or even potential. But maybe the hockeygrin.gif was you indication of facetiousness, so it could be that you would agree with this statement (or it could not).

Tomorrow's not promised to anyone, so be bold, scare yourself, attempt something with no guarantee of success. You'll be amazed at what you can achieve. -Olive McGloin
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thunderhead
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PostMon Nov 08, 2021 5:58 pm 
I think he means that this water year already passed all of last year. Northern cali has been getting dumped on the last month or so.

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Forum Index > Trail Talk > From Shasta, CA to Adams to Baker, WA to Kokanee, BC to Banff, AB High Glacier Mass Loss in 2021
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