Abstract
Climatic data with a high temporal and spatial resolution are invaluable when modelling the potential distribution of non‐native pests. The European Commission Joint Research Centre Monitoring Agricultural ResourceS (MARS) programme provides a unique source of European daily climatic data. Available from 1975 to 2015 and updated annually, the data are interpolated from over 5000 weather stations to 25‐km grid cells. All geographical Europe is included, plus Mediterranean areas of the Middle East and North Africa. The climatic parameters available include temperature (daily minima and maxima), solar radiation, rainfall and relative humidity. As well as the potential for use in simple pest models, selected parameters can be imported into more complex models, such as CLIMEX, for more detailed analyses. Case studies showing how the MARS data have been used by the UK in pest risk analyses are presented for three insect pests: Thaumetopoea pityocampa, Hyphantria cunea (both Lepidoptera) and Popillia japonica (Coleoptera). The case studies illustrate some methods of representing uncertainty where thresholds are lacking in the published literature, there are conflicting data and only air temperature data are available to model a soil‐dwelling organism.
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