Climatology of Mediterranean cyclones
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Below, a northen hemisphere chart is presented, with unlabelled isolines of percentage frecuency of cyclones.
The chart corresponds to an average for the northern hemisphere winter, during the period 1899-1939.
EXERCISE: Click on the image to find the four major maxima of cyclone centers frecuency for this period.
(¡PLEASE!, DO NOT CHECK BEFORE HAVING COMPLETED THE EXERCISE the underlying image.
That is important for the learning objectives to be achieved)

Percentage frecuency of cyclone centers in squares 100.000 km^2, for the northern hemisphere,
in winter, during the period 1899-1939, according to Pettersen, S., 1956: Weather Analysis and Forecasting
in squares 100.000 km^, Graw Hill, New York. (Unlabelled)

Percentage frecuency of cyclone centers, for the northern hemisphere, in winter,
during the period 1899-1939, according to Pettersen, S., 1956: Weather Analysis and Forecasting, Graw Hill, New York.
Right! This area, west of Greenland coast, is one of the four major maxima
of percentage frecuency of cyclone centers, for the northern hemisphere in winter.
Right! This area, on the pacific northeast corner, is one of the four major maxima
of percentage frecuency of cyclone centers, for the northern hemisphere in winter.
Right! This area, west of Iceland, is one of the four major maxima
of percentage frecuency of cyclone centers, for the northern hemisphere in winter.
Right! This area, ¡ON THE WESTERN MEDITERRANEAN!, is one of the four major maxima
of percentage frecuency of cyclone centers, for the northern hemisphere in winter.Notice the secondary maxima
over eastern Mediterranean, south of Ciprus island.
No. This area do not correspond to one of the four major maxima of percentage frecuency of cyclone centers,
for the northern hemisphere in winter.