| Figure 5. Map (a) shows the 1961-1990 average December-March precipitation derived from our linearregression-based model, which takes into account topographic factors such as elevation, slope, aspect, latitude, and longitude. Map (b) shows the 1961-1990 average December-March precipitation derived from interpolation (simple inverse distance weighting) without regard to topographic factors. Note the fine detail made available by using our model, which will allow CLIMAS stakeholders to better home in on their region of interest. Map (c) shows interpolated predicted minus observed precipitation (residuals). These values represent errors in prediction, i.e., variance in the data not captured by our precipitation model. Underpredictions are shown as negative values (blue) and overpredictions are shown as positive values (red). All units are in millimeters. 100 millimeters is approximately equal to 3.9 inches. |
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