Abstract
Modelling and Geographic Information System (GIS) technology are employed in order to extend spatially, estimated and observed growing season values of the components of the surface heat energy budget for an area of alpine tundra in the Colorado Front Range. A surface equilibrium temperature model is calibrated for one sub-class of vegetation surface and is used to model surface heat energy budget component values for other sub-classes of vegetation. The model values compare favorably with values independently estimated or observed. The data are spatially displayed using the Idrisi GIS. At the microclimatic scale the presence of different sub-classes of vegetation plays a large role in controlling the actual values of the surface heat budget components. This is in contrast to the larger scale at which climatic variables such as air temperature control the overall vegetation type found in the area.
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