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Modern Grand Solar Minimum

  • IASbaba
  • October 3, 2020
  • 0
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Modern Grand Solar Minimum

Part of: GS Prelims and GS-III – Space

In news

  • The magnitude of the Sun’s solar activity is decreasing. 
  • This period of decreased solar activity is known as the Modern Grand Solar Minimum that will last from 2020 to 2053.

Key takeaways

  • This is done by observing the number of Sunspots at any given time. 
  • The number of sunspots is directly proportional to solar activity. 
  • More Sunspots mean more solar activity.
  • The last time such an event occurred was during the Maunder Minimum, from 1645 CE to 1710 CE.

Impact

  • The surface temperatures on Earth may go down during the Modern Grand Solar Minimum due to a 70% reduction in solar magnetic activity.
  • Variations in solar irradiance will lead to heating of the upper layer of the Earth’s atmosphere and influences the transport of solar energy towards the planet’s surface.
  • Decreased solar activity has complex impacts on the abundance of ozone in the Earth’s atmosphere
  • It also affects the climatic cycles of Earth such as the North Atlantic Oscillation (NAO).

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