Many people believe that Indian summer is the best time of the year. F. Tyutchev, Olga Berggolts, Leonid Vasyukovich sang this period in their poems. He was glorified in the visual arts. It is reflected in folk proverbs and signs. But what caused this natural phenomenon when it occurs and how long it lasts - many cannot give a coherent answer to this. There is also confusion with the concepts of “Indian summer” and “golden autumn”. Let's try to figure it out.
Where does the name come from
Despite the differences in climates, in all countries of Europe, the USA and Canada there is this time. True, it does not always coincide in terms of time, which is understandable: it comes earlier in the north and later in the south. The name of the natural phenomenon arose organically: the harvest was over, and old women can warm their bones in the mound, rejoicing at the last warmth. But not all peoples, this time is indicated by the term "Indian summer." This is the time of St. Martin (November 11) in Spain, Portugal and Italy; Michael (September 28) in Serbia, Croatia; San Denis - in France. In Bulgaria, it is customary to call it “gypsy summer”, and in the USA and Canada - “Native American”. The Czechs call this time "Semenna - Panna Maria", the Carpathian Slavs - "woman frosts". And in the subtropics, this period is called the "velvet season."
Why is Indian summer happening?
This natural phenomenon is associated with the action of the so-called Azores anticyclone. After the first cooling, which occurs in different territories at different times, the air masses warmed up over the summer form an extensive high-pressure zone. She, along with the Western trade winds, begins her advance east. In Western Europe, he is hardly noticed: summer reigns under the influence of the Gulf Stream. But in the west of Russia, Indian summer is a long-awaited joy after the first breath of the approaching winter. Rains and fogs end, the air warms up to + 25 ° C during the day. The air is transparent and clean, in the bright sun gleaming long threads of cobwebs.
Indian summer duration
Since this climatic phenomenon also depends on the weather, Indian summers do not have clear dates for the onset, end, and duration. If July-August were cool, then the Azores anticyclone is weak. In certain years, Indian summer does not happen at all, and in others, two “waves” of this wonderful time occur. By the way, Russians have special definitions for these cycles: “young Indian summer” (late August – early September) and “old” (from a few days to a week in the second half of the ninth month of the year). Therefore, even meteorologists find it difficult to predict when the Indian summer will begin. 2013 was a typical year for the climate of Russia. But what can we expect next?
