glacier dynamics
DESCRIPTION
Glacier Dynamics. Glacier Bay National Park and Preserve Klondike Gold Rush National Historical Park. Justification. Integrate weather, hydrology, landscapes, provide visitor opportunities “raison d’etre ” - PowerPoint PPT PresentationTRANSCRIPT
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Southeast Alaska NetworkInventory and Monitoring Program
Glacier Dynamics
Glacier Bay National Park and PreserveKlondike Gold Rush National Historical Park
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Justification
• Integrate weather, hydrology, landscapes, provide visitor opportunities
• “raison d’etre”• “Determine changes in
glacial extent and configuration of selected glaciers in GLBA and KLGO.”
Southeast Alaska NetworkInventory and Monitoring Program
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Alaska NPS Glacier Inventory and Change Assessment1. Map change in areal extent in
the 1950’s and 2000’s2. Estimate volume changes
over various time periods (~1995 – 2011)
3. More thoroughly characterize 1-3 “focus glaciers” per park
Southeast Alaska NetworkInventory and Monitoring Program
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Areal ExtentAnthony Arendt - UAF
• Glaciation in GLBA diminished 11% (from 53.5 to 48.4%) between 1952 and 2010
• Datasets describing physical characteristics of each glacier are in development (length, width, slope, area, elevation).
• Methods: image processing, digitizing, and watershed modelingSoutheast Alaska Network
Inventory and Monitoring Program
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Southeast Alaska NetworkInventory and Monitoring Program
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Volume ChangeChris Larsen - UAF• Found negative glacier-wide mass
balance rates with 5 exceptions.• Thinning was greatest on Grand
Pacific 2001-2009 (1.99 m/yr)• Methods: existing altimetry
profiles extrapolated glacier-wide using best available DEM
• Will project to additional glaciers beyond those directly measured
Southeast Alaska NetworkInventory and Monitoring Program
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What we’re learning
Southeast Alaska NetworkInventory and Monitoring Program
2000-2005
2000-2009
Volume change by elevation
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Focus GlaciersMike Loso - APU• Demonstrate unique ways in which
A) glaciers change in response to climate, and B) landscapes respond to glacier change.
• Focuses on interpretation and synthesis.
• Narratives, photos, maps will be presented as “vignettes”.
Southeast Alaska NetworkInventory and Monitoring Program
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Focus Glaciers
• Brady – Remote tidewater with very low-elev accum. zone
• Margerie– Cruise-ship visible, tidewater, high-elev accum. zone
• Muir– Formerly tidewater with spectacular retreat history
• Nourse– Outside park, moraine-dammed threatens infrastructure
Southeast Alaska NetworkInventory and Monitoring Program
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Logistics and Budget
• 10 year revisit schedule• Current project
– 3 years, $400,000 statewide– Multiple investigators, minimal fieldwork– Methods and technology are feasible but developing
rapidly– Dependent on quality of available remotely sensed
data and DEMs
Southeast Alaska NetworkInventory and Monitoring Program
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What we’re learning
Southeast Alaska NetworkInventory and Monitoring Program
• Ability to tell a more complete story• Drawing multiple partners together
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Southeast Alaska NetworkInventory and Monitoring Program
Program Delivery
• GIS data will be in PDS, and IRMA, and GLIMS, and GINA
• First progress report headed to IRMA• Poster presented at SW AK Parks
Symposium• Reports and presentations are on W drive• Protocol status = pending outcomes