KLIWAS 
Seite 20 
KLIWAS 
Climatology 
of North Sea 
Fronts 
SST - Front Zone Vector Direction 
frontzone_vector_direction 
West North East South West 
gradient vector points from cold to warm 
Fig. 10: Direction of mean gradient vector for frontal zone based on the data of the AVHRR 
sensor on NOAA and METOP 1990 - 2011 and for seasons