12 MAY 1990, Page 27

Sir: William Cooper correctly predicts (10 March) that atmospheric warming

will spawn more vigorous Atlantic depressions, but he is wrong to deduce that Britain will thereby experience stormier conditions. For the centrifugal pole-ward Coriolis force, enhanced by a greater mass of warm air encroaching from the South, will whirl these vortices on a more northward course than at present — the mean track of depressions possibly backing from south- east of Iceland westward into the Denmark Strait.

We can then expect a consequent north- ward shift of the Sahara High, extending Mediterranean conditions of warm wet winters (such as we have experienced for the three seasons now) and hot dry sum- mers (for two) well into northern Europe. John A. Cooper

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