Climate explainers are struggling trying to tell us why it is all our fault that bitter cold is gripping the USA this winter, our fault that winters have grown colder in Europe and the USA over the last 25 years.
Remember: they shifted away from “global warming” to “climate change” because things weren’t warming the way their propaganda said it would.
Why So Cold? Climate Change May Be Part of the Answer
By HENRY FOUNTAINJAN. 3, 2018
As bitter cold continues to grip much of North America and helps spawn the fierce storm along the East Coast, the question arises: What’s the influence of climate change?
The reason a direct connection between cold weather and global warming is still up for debate, scientists say, is that there are many other factors involved. Ocean temperatures in the tropics, soil moisture, snow cover, even the long-term natural variability of large ocean systems all can influence the jet stream.
“I think everyone would agree that potentially the warming Arctic could have impacts on the lower latitudes,” said Rick Thoman, climate services manager with the National Weather Service in Fairbanks, Alaska. “But the exact connection on the climate scale is an area of active research.”
But scientists have been puzzled by data that at first seems counterintuitive: Despite an undeniable overall year-round warming trend, winters in North America and Europe have trended cooler over the past quarter-century.
“We’re trying to understand these dynamic processes that lead to cold winters,” Ms. Kretschmer said
She is the lead author of a study published last fall that looked at four decades of climate data and concluded that the jet stream — usually referred to as the polar vortex this time of year — is weakening more frequently and staying weaker for longer periods of time. That allows cold air to escape the Arctic and move to lower latitudes. But the study focused on Europe and Russia.
“The changes in very persistent weak states actually contributed to cold outbreaks in Eurasia,” Ms. Kretschmer said. “The bigger question is how this is related to climate change.”