Glacier melt modelling in the Donjek Range, St. Elias Mountains, Yukon Territory

Peer reviewed: 
No, item is not peer reviewed.
Date created: 
2009
Keywords: 
Glaciology
Glaciers -- Yukon Territory
Glaciers
Mountain climate
Temperature-index modelling
Energy balance
Surface temperature
St. Elias Mountains
Glacier mass-balance
Regional modelling
Abstract: 

Toward addressing the challenges associated with regional glacier melt modelling, I investigate the physical mechanisms of glacier melt using energy balance models, then test empirical temperature-index melt models for regional applications. First, five energy balance models are applied to two glaciers in the Donjek Range, St.~Elias Mountains in order to quantify the differences between various treatments of the glacier surface temperature and subsurface heat flux. A model that assumes a constant 0°C surface temperature overestimates cumulative melt by 9–13%, but a simple model that computes surface temperatures from the residual of the energy balance yields significant improvement. Second, I evaluate the transferability of spatially-distributed temperature-index melt models through the application of calibrated model parameters to periods and locations that differ from those used for calibration. Results show that the calibrated model parameters can be transferred between the study glaciers with minimal reductions in skill.

Language: 
English
Document type: 
Thesis
Rights: 
Copyright remains with the author. The author granted permission for the file to be printed and for the text to be copied and pasted.
File(s): 
Supervisor(s): 
G
Department: 
Dept. of Earth Sciences - Simon Fraser University
Thesis type: 
Thesis (M.Sc.)
Statistics: