Category : UPSC / STATE PCS
Sudden Stratospheric Warming (SSW) Event
Meteorologists have warned Sudden Stratospheric Warming (SSW) event may occur in December this year. SSW will send unusually cold Arctic air into parts of United States.
What is SSW event?
It is rapid rise in stratospheric temperature that weakens or distorts the Polar Vortex, the circulation of strong westerlies winds around the Arctic often causing major weather anomalies at the surface.
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Why SSW Event occur?
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Implication of SSW Events –
1. Weather Impacts –Sudden Cold waves, snow storms, extended freezing conditions across North America & Europe.
Shifting of storm tracks and create high pressure blocks over North Atlantic.
2.Forecast Challenges –It is hard to predict in advance.
Struggle to pinpoint where the Displaced Arctic Air will descend.
3. Effects on India – Cold surges, enhanced western disturbances and prolonged cold wave days
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