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<p style="margin-right:0cm"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif">Another polar vortex is on the cards, thanks to a sudden stratospheric warming event around the North Pole.</span></span></p>
<p style="margin-right:0cm"> </p>
<p style="margin-right:0cm"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><strong>Details</strong></span></span></p>
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<li>
<p><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif">During such episodes, the stratosphere can increase in temperature by up to 90°F (50°C) over mere days.</span></span></p>
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<p><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif">This disturbance can travel down through the atmosphere and if it reaches the ground — can cause shifts in the jet stream that cool Europe and northern Asia. </span></span></p>
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<p><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif">Experts studied 40 stratospheric warming episodes from the last six decades and learnt to track their signals that they travel down to the Earth's surface.</span></span></p>
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<p><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif">While an extreme cold weather event is not a certainty, sudden stratospheric warmings have a significant impact on surface weather.</span></span></p>
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<p><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif">The sudden stratospheric warming can potentially result in polar vortex splitting into two smaller "child" vortices.</span></span></p>
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<p><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif">Such splitting, the team found, tends to be associated with colder weather over both Siberia and north-west Europe.</span></span></p>
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<p style="margin-right:0cm"> </p>
<p style="margin-right:0cm"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><strong>Stratospheric warming</strong></span></span></p>
<p style="margin-right:0cm"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif">A sudden stratospheric warming (SSW) is an event in which polar stratospheric temperature rises by several times over a course of few days. SSW is closely associated with polar vortex breakdown.</span></span></p>
<p style="margin-right:0cm"> </p>
<p style="margin-right:0cm"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><strong>Polar vortex</strong></span></span></p>
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<li>
<p><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif">A polar vortex is a low pressure area that is parked in polar regions. During winter, the polar vortex at the North Pole expands, sending cold air southward. </span></span></p>
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<p><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif">This happens fairly regularly and is often associated with outbreaks of cold temperatures in the United States.</span></span></p>
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<li>
<p><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif">Sometimes this low-pressure system can weaken and travel from its usual position. As this system weakens, part of the polar vortex can break off and migrate south, bringing plenty of cold air with it.</span></span></p>
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<li>
<p><span style="font-size:11.0pt"><span style="font-family:"Calibri","sans-serif"">The reason for breaking of the pressure system is attributed to global warming when polar ice melts faster than usual, resulting in dissipation of heat.</span></span></p>
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<p style="margin-right:0cm"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif">Another polar vortex is on the cards, thanks to a sudden stratospheric warming event around the North Pole.</span></span></p>
<p style="margin-right:0cm"> </p>
<p style="margin-right:0cm"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><strong>Details</strong></span></span></p>
<ul>
<li>
<p><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif">During such episodes, the stratosphere can increase in temperature by up to 90°F (50°C) over mere days.</span></span></p>
</li>
<li>
<p><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif">This disturbance can travel down through the atmosphere and if it reaches the ground — can cause shifts in the jet stream that cool Europe and northern Asia. </span></span></p>
</li>
<li>
<p><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif">Experts studied 40 stratospheric warming episodes from the last six decades and learnt to track their signals that they travel down to the Earth's surface.</span></span></p>
</li>
<li>
<p><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif">While an extreme cold weather event is not a certainty, sudden stratospheric warmings have a significant impact on surface weather.</span></span></p>
</li>
<li>
<p><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif">The sudden stratospheric warming can potentially result in polar vortex splitting into two smaller "child" vortices.</span></span></p>
</li>
<li>
<p><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif">Such splitting, the team found, tends to be associated with colder weather over both Siberia and north-west Europe.</span></span></p>
</li>
</ul>
<p style="margin-right:0cm"> </p>
<p style="margin-right:0cm"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><strong>Stratospheric warming</strong></span></span></p>
<p style="margin-right:0cm"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif">A sudden stratospheric warming (SSW) is an event in which polar stratospheric temperature rises by several times over a course of few days. SSW is closely associated with polar vortex breakdown.</span></span></p>
<p style="margin-right:0cm"> </p>
<p style="margin-right:0cm"><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif"><strong>Polar vortex</strong></span></span></p>
<ul>
<li>
<p><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif">A polar vortex is a low pressure area that is parked in polar regions. During winter, the polar vortex at the North Pole expands, sending cold air southward. </span></span></p>
</li>
<li>
<p><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif">This happens fairly regularly and is often associated with outbreaks of cold temperatures in the United States.</span></span></p>
</li>
<li>
<p><span style="font-size:11pt"><span style="font-family:Calibri,sans-serif">Sometimes this low-pressure system can weaken and travel from its usual position. As this system weakens, part of the polar vortex can break off and migrate south, bringing plenty of cold air with it.</span></span></p>
</li>
<li>
<p><span style="font-size:11.0pt"><span style="font-family:"Calibri","sans-serif"">The reason for breaking of the pressure system is attributed to global warming when polar ice melts faster than usual, resulting in dissipation of heat.</span></span></p>
</li>
</ul>
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