Barometric lows of cyprus

Abstract

Abstract Regeneration of shallow secondaries, stationary near Cyprus for some time, is brought about by the approach of a stream of polar air from eastern Europe, or Asia Minor. The process is quite marked and common, and represents the main mechanism underlying the development of deep depressions in the eastern Mediterranean in winter. Successive cold fronts become traceable on the charts, and shallow thundery depressions, which travel with the general circulation round the main barometric minimum, sometimes develop in the polar air over Egypt; but the system of isobars and fronts is not Norwegian, and while the low can be regarded as orographic in origin, the associated weather is generally analogous to squall phenomena rather than to the development of a depression, and can be treated on the lines suggested by Margules. These regenerated lows are usually accompanied by the occurence of a strong south‐east current over Iraq. This phenomenon has, however, been regarded as a topographical effect; the current being mainly induced to flow parallel to the general run of the plateau of Iran under the effect of convergence into the Cyprus Iows. The present work also endeavours to show that the known seasonal features of the Mediterranean, which are associated directly with the southward extension from summer to winter of the zone of barometric depressions and accompanying westerly winds over the Atlantic and Europe, and with the formation in summer of the great continental low of Asia, are also influenced, at least in the eastern areas, by the Sudan low in the transitional seasons, and by the Siberian anticyclone in winter.