Here we go again: Climate activists blame record cold/snow on warming! – ‘How global warming also brings colder weather’ – Climate Depot Rebuttal

https://www.dw.com/en/cold-winter-global-warming-polar-vortex/a-56534450?maca=en-Twitter-sharing

By Jeannette Cwienk – Deutsche Welle (DW) – Germany’s international broadcaster

Article Claim: Temperatures in the Arctic have risen more than twice as fast as the global average over the past 40 years.

Reality Check: Study’s Model Simulations Show Arctic Sea Ice Reached Lowest Point On Modern Record… In The 1940s, Not Today

Arctic Cool Off: Canada, Greenland & Iceland Have Seen Almost No Warming So Far This Century

Settled climate science?! Everywhere is warming faster than everywhere! –

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Article Claim: “If the jet stream is weak and wavy, the polar vortex also weakens, and sometimes breaks down completely. The cold snap across Europe is the result of a weak jet stream — more precisely a dip — that has caused a strong and long-lasting collapse of the polar vortex.”

Feb. 2021: Polar vortex theory takes a beating: Journal Nature Refutes Claim That A Warmer Arctic Causes Extreme Cold Snaps

2019: UN IPCC’s Kevin Trenberth rebukes fellow warmists on polar vortex claims! ‘Frankly, it is a stretch to make that link…this is in realm of weather — Not climate’ – “Frankly, it is a stretch to make that link,” Kevin Trenberth, a climate scientist at the National Center for Atmospheric Research, told The Daily Caller News Foundation on Tuesday. “There is always cold air over the Arctic in the polar night and the question is whether it sits there or breaks out,” Trenberth said. “So all this is in realm of weather. Not climate.” … “‘Climate change’ once referred to outcomes measured via statistics (‘detection’) tracked over decades,” University of Colorado professor Roger Pielke Jr. noted Wednesday on Twitter. “Today ‘climate change’ is most often used as a causal factor in attributing events over hours, days or weeks,” Pielke said. “We’ve become dumber.”

Vortices Of Controversy…Experts Slam Polar Vortex-Global Warming Claim, Suggest Public Trickery

Veteran Swiss Meteorologist Slams Media For ‘Making It Up’…NOAA: Polar Vortex Term ‘Nothing New…Appeared In 1853’

Elizabeth Warren Uses Coldest ‘Polar Vortex’ In Decades To Call For ‘Green New Deal’ To Fight Global Warming

Polar Vortex: Killer Freeze Is Really Due To…Wait For It…Global Warming

Physicist rips ‘global warming’ causing record cold claims: The whole ‘narrative involving the polar vortex is just another pseudoscientific scam’

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Obama’s nuclear czar Ernest Moniz blames climate inaction for cold weather in Texas: ‘It’s giving the public an idea of what the stakes are for addressing the climate crisis’

.@BetoORourke blames Americans’ “emissions and our excesses and our inaction” for cold weather in Texas pic.twitter.com/VRdZky7m7A

— Tom Elliott (@tomselliott) February 17, 2021

He claims that Texas cold is "directly related to the warming", which specifically is unproven and in general wrong:

*ALL* climate models show higher temps➡️fewer cold days and nights

You can't just look at everything you don't like and claim it is caused by climate pic.twitter.com/7Qe9MLYHAN

— Bjorn Lomborg (@BjornLomborg) February 19, 2021

More climate nonsense from the @nytimes . During the 1970's, the identical weather patterns were blamed by climate scientists on global cooling and expanding sea ice. We have always had extreme weather and @khayhoe has been consistently wrong about everything. @Revkin pic.twitter.com/pkMHL6lfnM

— Tony Heller (@Tony__Heller) February 16, 2021

Record Cold/Snow caused by ‘global warming’?! Climate activists predict both outcomes — more snow, less snow — so they are never wrong – Book excerpt

https://www.dw.com/en/cold-winter-global-warming-polar-vortex/a-56534450?maca=en-Twitter-sharing

By Jeannette Cwienk – Deutsche Welle (DW) – Germany’s international broadcaster

Why is it so cold?

The past week’s sub-zero temperatures and heavy snowfalls are more than just a cold winter. They are made more likely by the collapse of the polar vortex — a huge ring of cold winds raging in the Earth’s stratosphere — at the North Pole.

The polar vortex is closely connected to the jet stream, a band of strong winds about 10 kilometers above the ground. At the polar front, this flows between warm air from the tropics and subtropics, and cold polar air. The pressure extremes that form in this transitional area at lower layers are sometimes referred to in weather reports as the Icelandic low or the Azores high.

The jet stream usually determines the winter weather in Europe: if it is strong and flows from west to east, it brings mild, windy and rainy weather from the Atlantic, and holds the cold air from the Arctic.

But if the jet stream is weak and wavy, the polar vortex also weakens, and sometimes breaks down completely. The cold snap across Europe is the result of a weak jet stream — more precisely a dip — that has caused a strong and long-lasting collapse of the polar vortex.

How can climate change make the weather colder?

Excerpt: Climate change, however,  doesn’t only lead to higher temperatures, but more extreme weather.

This is where the disproportionate warming of the Arctic comes into play, said Stefan Rahmstorf, head of the Earth System Analysis research department at the Potsdam Institute for Climate Impact Research (PIK). Temperatures in the Arctic have risen more than twice as fast as the global average over the past 40 years. “These changes are affecting the weather in Europe.”

Arctic warming is particularly strong in winter, said Dörthe Handorf, who researches the physics of the atmosphere at the Alfred Wegener Institute of the Helmholtz Centre for Polar and Marine Research (AWI). “As many studies show, this weakens the jet stream.”

The wind stream begins to fray, said Handorf, which could lead to more dips that affect temperatures in Europe.

Will climate change make European winters colder?

Climate change won’t necessarily make European winters colder because the outbreaks of cold air from the polar vortex are sometimes milder than the current cold snap. The Arctic is also not the only part of the world where air currents are changing because of rising temperatures.

Strong warming over the subtropics also affects the jet stream, said Handorf. While the Arctic warming tends to direct the jet stream southwards and cause cold spells in Europe, the subtropical warming generally sends the band northwards. If this is the case, she said, the winter weather in Europe will be milder. Climate models do not yet know which warming trend will dominate in the future, she added.