TNPSC Thervupettagam

Sudden Stratospheric Warming

January 28 , 2021 1429 days 1178 0
  • The Southern India received excessively heavy rainfall (ten times the normal) between January 1, 2021 and January 17, 2021.
  • This winter rain, according to the scientists, is due to sudden stratospheric warming that occurred in Arctic region.
  • The Sudden Stratospheric Warming is an event where the polar stratospheric temperature increases up to fifty degrees Celsius.
  • It is preceded by a situation where the polar jet stream of westerly winds in the northern hemisphere is disturbed by natural weather patterns.
  • This is usually addressed as polar vortex.
  • It is a whirling cone of low pressure over the poles.
  • It is the strongest in winter.
  • It is due to the difference in temperature between polar and mid latitude regions.
  • It spins in the stratosphere.
  • The Stratosphere is the layer of the atmosphere at a height of ten to fifty kilo metres above the earth surface.

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