HYSPLIT backward trajectories in Oiartzun and BTV-1 outbreaks in the Iberian Peninsula.

A. Backward trajectories from the HYSPLIT model at 10 m (red), 500 m (blue) and 1000 m (green) above ground level. Days: September 30, October 1 and October 2, 2007. B. Dots in the map show the outbreaks in the Iberian Peninsula from August 25 to October 5, before and during the hypothetical wind-borne transport of infected Culicoides.