Bray cycle effects.pdf

Summary of the climatic effects of low solar activity associated to the Bray 2500-year cycle. Most effects derive from an atmospheric reorganization that contracts the Hadley cells and expands the Polar cells steepening the latitudinal temperature gradient and causing global cooling. Monsoon patterns are restricted, causing sub-tropical drying. El Niño is less frequent altering global precipitation patterns. The North Atlantic displays more AO/NAO winter negative conditions shifting the winter European storm track southwards. Weaker westerlies reduce the sub-polar gyre contribution to the North Atlantic current, increasing winter precipitation over Scandinavia and promoting glacier growth. A stronger Siberian High activates polar circulation and southward drift-ice, cooling northern Eurasia. Greenland undergoes a temperature inversion. Black dots represent proxy locations displaying a prominent 2500-year periodicity.