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A sudden stratospheric warming (SSW) is an event in which polar stratospheric temperatures rise by several tens of kelvins (up to increases of about 50 °C (90 °F)) over the course of a few days. [ 1] The warming is preceded by a slowing then reversal of the westerly winds in the stratospheric polar vortex.
From late December to early January, a sudden stratospheric warming event was observed over the Arctic, which caused the "polar vortex" to weaken and split into three lobes. In late January 2019, one of these lobes traveled southward and stalled over central Canada and north-central United States for about a week before the upper-level flow of ...
Beginning on January 2, 2014, sudden stratospheric warming (SSW) [dubious – discuss] led to the breakdown of the semi-permanent feature across the Arctic known as the polar vortex. Without an active upper-level vortex to keep frigid air bottled up across the Arctic, the cold air mass was forced southward as upper-level warming displaced the ...
A Sudden Stratospheric Warming miles above the North Pole (a natural event) with a warmed Arctic due to climate change piggy backing on that pattern = unstable PV & wavy extreme jet stream, with ...
A sudden stratospheric warming (SSW) is an event that occurs when the stratospheric vortex breaks down during winter, and can have significant impacts on surface weather. [ citation needed ] The tropospheric polar vortex is often defined as the area poleward of the tropospheric jet stream .
“We did have a sudden stratospheric warming in January,” explained Butler, a NOAA stratosphere expert. “The polar vortex weakened. “The polar vortex weakened. It got stretched out of shape ...
Met Office said there’s a high chance of Sudden Stratospheric Warming which could impact weather within weeks Warning UK faces ‘sudden’ weather event that previously led to ‘Beast from the ...
The February 2021 North American cold wave was an extreme weather event that brought record low temperatures to a significant portion of Canada, the United States and parts of northern Mexico during the first two-thirds of February 2021. The cold was caused by a southern migration of the polar vortex, likely caused by a sudden stratospheric ...