Glacier Monitoring in the Central Alaska Network of National Parks

Loso MG . Glacier Monitoring in the Central Alaska Network of National Parks. 1991. National Park Service

Glaciers and glacier systems are dominant and dynamic physical features of two of the three parks (Denali, Wrangell-St. Elias) in the Central Alaska Network and are a driver of landform and ecosystem change in them. Glaciers are inextricably tied to climate and the hydrological cycle. Because glacier systems are regulated solely by climate fluctuations, they provide a reliable record of long-term climate change that has already occurred. Upper elevation climate is nearly impossible to measure directly and can be well represented by glacier dynamics. Glaciers provide significant hydrologic base flow to major rivers in Central Alaska national parks. Mass balance (snow accumulation and snow/ice melt) is the primary variable monitored on an annual basis in Denali and Wrangell-St. Elias. In Denali, mass balance has been measured twice annually (spring and fall) on Traleika and Kahiltna glaciers since 1991. Measurements on Kahiltna are ongoing, while measurements on Traleika were discontinued in 2016. In Wrangell-St. Elias, mass balance is measured twice annually on Kennicott Glacier, and is ongoing. Terminus mapping is completed for the parks using aerial and/or satellite imagery every decade or so. In addition, repeated measurements are taken on several focus glaciers throughout the park to measure changes in surface elevation.

Type
Project
Authors
Loso, Michael
Publisher
National Park Service
Units
CAKN , DENA , WRST
Keywords
CAKN, Central Alaska Network, change, climate change, cryosphere, DENA, Denali National Park, glacier, glaciers, inventory, monitoring, repeat photography, vital signs, Wrangell-St. Elias National Park, WRST
Subjects
Ecological Framework: Geology and Soils | Geomorphology | Glacial Features and Processes

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