Phenology models and categories selection
Currently there are over 90 models including a generic DD calculator in our database. First click on the model category list for your subject of interest to narrow the range of models available. Then select a model from the model list. Most models were originally developed for use in the Northwestern US, but many were added to be used in other areas of the US. The threshold values are not selectable for a given model. To change thresholds, use the DD calculator, where you may also change calculation method, and start and stop dates. Then click the "CALC/RUN MODEL" button to calculate degree-days.