2022 Early Hearing Detection & Intervention Virtual Conference
March 13 - 15, 2022
5/23/2019 | 11:00 AM - 11:15 AM | THE FUTURE OF GLACIAL-FED STREAMFLOW IN THE AMERICAN WEST | 250 AB
THE FUTURE OF GLACIAL-FED STREAMFLOW IN THE AMERICAN WEST
Perennial snow patches and glaciers are common to many high alpine environments. Less obvious high alpine glacial features are rock-covered glaciers and rock glaciers, where ice fills the voids between rocks. The geographic distribution of glaciers, debris-covered glaciers, and rock differ across the American West with more glaciers in the Pacific Northwest (Washington) and more rock glaciers in the south-central (Colorado). All glaciers provide two important streamflow services, supplying cool meltwater during the hottest, driest parts of the summer, and regulating seasonal streamflow variations, which mitigates the effects of drought. Runoff characteristics also differ. Streamflow from glaciers exhibit flashier daily flow variations and a faster runoff response with greater discharge to warmer weather. Rock debris insulates the subsurface ice from warm air temperatures and solar radiation slowing runoff response and reducing melt. However, as the climate warms, debris-covered and rock glaciers will persist longer into the future. The effect of glaciers on stream water quality (not including suspended sediment) depends the relationship between upstream glacier area and distance downstream. These processes will be examined in the context of a warming world.
- ClimateChange
- Aquatic-terrestrial Linkage
- Geomorphology
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Presenters/Authors
Andrew G. Fountain
(), Portland State University, andrew@pdx.edu;
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Allison Trcka
(), Portland State University, atrcka@pdx.edu;
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Bryce Glenn
(), Portland State University, brglenn@pdx.edu;
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