Voeykov axis

Voeykov axis (or Voeikov axis) is the axial portion (ridge) of a high atmospheric pressure band stretching across Eurasia roughly along the 50th parallel. It was named in honor of Alexander Voeykov, a climatologist, who studied this phenomenon.

The formation if the Voeykov axis is due to the continental climate in the hinterland of Eurasia. In winter, the territory of Mongolia and Siberia experience strong cooling. This leads to the formation of stable high atmospheric pressure, known as the Siberian anticyclone. The huge size of the continent, and also the relief of the earth's surface contributes to the ride formation. In Tuva, Mongolia and to the north are vast basins and valleys, surrounded by high mountain ranges. In winter, they cool air and stagnation occurs, that favors the growth of atmospheric pressure.

On the territory of Mongolia and southern Siberia the high-pressure region diverges in two spurs in two directions - to the north and west. To the north, extends the East Siberian anticyclone. It involves a clear, quiet and extreme freezing weather, which is set in the winter in the vast eastern Siberia. West departs Voeykov axis, which can be traced on the territory of Kazakhstan and in the south of the East European Plain. It extends approximately along the line Kyzyl - Uralsk - Saratov - Kharkiv - Chisinau. To the west of Moldova, it continues, gradually weakening, down to the South of France, where there is already an action of another center of high pressure - Azores anticyclone.

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