Editing has been performed to remove artifacts and interpolate over failed regions. DEM used to...
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Transcript of Editing has been performed to remove artifacts and interpolate over failed regions. DEM used to...
•Editing has been performed to remove artifacts and interpolate over failed regions.•DEM used to orthorectify image bands•False color VNIR composite draped over DEM for 3-D visualization
Glacier Mass Balance Studies
• ASTER data being used to predict response of glacier systems to climate change
• Glacier boundary outlines (using GLIMSView) combined w/ ASTER-derived DEM to get hypsography
• Hypsography plus measurements from benchmark glacier used to define mass balance as function of ELA for entire glacier system
•Mask DEM using ice outlines•Compute histogram of elevations
Glacier Mass Balance Studies
• ASTER data being used to predict response of glacier systems to climate change
• Glacier boundary outlines (using GLIMSView) combined w/ ASTER-derived DEM to get hypsography
• Hypsography plus measurements from benchmark glacier used to define mass balance as function of ELA for entire glacier system
•Digitizing outlines w/ GLIMSView•Exports data in format specified for ingest into GLIMS database at NSIDC
Glacier Mass Balance Studies
• ASTER data being used to predict response of glacier systems to climate change
• Glacier boundary outlines (using GLIMSView) combined w/ ASTER-derived DEM to get hypsography
• Hypsography plus measurements from benchmark glacier used to define mass balance as function of ELA for entire glacier system
Area vs. Elevation
3600
3800
4000
4200
4400
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4800
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0 5 10
Area (%)
Ele
va
tio
n
Petrov (this analysis)
Akshiyrak (Kuz'michenok)
Hypsography compared to previous field survey (Kuzmichenok, 1977)
Glacier Mass Balance Studies
• ASTER data being used to predict response of glacier systems to climate change
• Glacier boundary outlines (using GLIMSView) combined w/ ASTER-derived DEM to get hypsography
• Hypsography plus measurements from benchmark glacier used to define mass balance as function of ELA for entire glacier system
The “Template” Method
• Field measurements of benchmark glacier used to find annual mass balance as function of accumulation area ratio (AAR)– This relationship is assumed to apply to all glaciers
in a region sharing similar climate, terrain, etc.
• Integral of area vs. elevation curve gives AAR as function of equilibrium line altitude (ELA)
• Thus, we can get mass balance as function of ELA for any glacier, using its hypsography
![[CS7031] Graphics and Console Hardware and Real-time …and A2 w2 Also interpolate 1 w1 and 1 w2 These also interpolate linearly in screen space Divide interpolants at each sample](https://static.fdocuments.in/doc/165x107/5e7aed2ef9dc26191841932f/cs7031-graphics-and-console-hardware-and-real-time-and-a2-w2-also-interpolate.jpg)
