mapping future snow cover in idaho brandon c. moore university of idaho
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Mapping future snow cover in Idaho
Brandon C. Moore
University of Idaho
Outline
Model Development
Validation
Results
Future Research
Model Development
Why start from scratch? Develop in-depth understanding Complicated models
Inputs Temperature Precipitation
Outputs Snow cover SWE Snow depth Snow density Runoff
Model Development
Anderson, E.A., 1976.
Brown, R.D., B. Brasnett, and D. Robinson., 2003.
Singh and Singh.
Model Validation
Validation at “high quality” SnoTEL locations
Determined by experienced SnoTEL users
Force snow model with observed monthly temperature and precipitation
Provides baseline of quality of the model
Model Validation
Model Validation
Remote Sensing Imagery
Snow Cover Extent Snow Water Equivalent
Hydrologic model comparisons
USGS streamflow data
Model Results
Modeled April 1974 snow cover for the state of Idaho
Model Results
Modeled April 2093 snow cover for the state of Idaho
Model Results
Modeled April 2077 snow cover for the state of Idaho
Model Results Trend in the fraction of Idaho snow covered.
Model Results Elevation trend in statewide snow cover
Model Results Figure from Mote et al, 2005
Model Results
March trend in SWE (1950-1999)
Future Research
Model Validation
As outlined previously
Multiple downscaled climate scenarios
GISS-ER, IPSL-CM4, CCSM3, PCM1
Move toward finer spatial resolution
1/8th degree to 1/16th degree
Future Research Snow Cover Imagery
1990 – 2003 NOHRSC Difficulties
Multiple formats Projection Issues Spatial Resolution
2001 – present MOD10A2 8-day composite
Dataset for the Western US
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