Tropical-Extratropical Interactions Causing Precipitation in Northwest Africa: Statistical Analysis and Seasonal Variations

Knippertz, Peter
December 2003
Monthly Weather Review;Dec2003, Vol. 131 Issue 12, p3069
Academic Journal
Employs an automatic algorithm to identify tropical-extratropical interaction (TEI) episodes on the basis of a 20-year climatology of four-day backward trajectories starting at 400 hPa over northwest Africa. Climatological relevance of TEI situations for different seasons; Indication that the region with the highest relative importance of TEIs is the semiarid southern foothills of the High Atlas.


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