Models, Climate Scientists Wrong Again…New Study Finds Jet Stream Strengthening, Not Weakening

Alarmist climate research centers like the Potsdam Institute and the unquestioning media have been claiming for years that the Jet Stream is weakening, hence this would lead to greater weather extremes across the northern hemisphere due to blocking. Responsible for this of course is man-made global warming.

Hat-tip: The Klimaschau

But a recent paper by Samantha Hallam et al published in the journal Climate Dynamics looks at the seasonal to decadal variations in Northern Hemisphere jet stream latitude and speed over land for the period 1871–2011. The authors were unable to find any weakening of the sort climate alarmists have been warning about.

Quite to the contrary, the authors in fact found that the winter jet stream over the North Atlantic and Eurasia has increased in average speed by 8% to 132 mph. The authors found the 141-year trends in jet latitude and speed show differences on a regional basis and that jet speed shows significant increases evident in winter (up to 4.7 ms −1 ), spring and autumn over the North Atlantic, Eurasia and North America. Over the North Pacific, no increase was observed.

Source: Figure 9, Climate Dynamics.

Moreover, the Jet Stream was found to have shifted northward by some 330 kilometers. Overall, the paper’s findings contradict the claims of a weakening Jet Stream regularly made by the climate alarmists and their media minions.

Applying climate alarmist science, we’d have to conclude now, due to the strengthening Jet Stream, less weather extremes should be expected. This would be good news of course. But don’t expect the fear-porn media to look at this.




15 responses to “Models, Climate Scientists Wrong Again…New Study Finds Jet Stream Strengthening, Not Weakening”

  1. Robert Folkerts

    What has happened to Notrickszone? Can only see it on Gab. Google hiding it?

  2. Richard Greene

    It’s not fair to compare anything to climate computer games (models).
    They are intended to scare people, not for accurate forecasts.

    That’s like comparing any prior US president to Jumpin’ Joe Biden.
    That would make any prior president look good.

  3. RoHa

    No problem.

    “The Jet Stream is strengthening. This will lead to greater weather extremes across the northern hemisphere due to unblocking. Responsible for this of course is man-made global warming.”

    Done.

    1. Yonason

      Problem

      ”A warming Arctic weakens the jet stream, which allows more extreme weather to be possible.”

      https://weather.com/news/climate/news/jet-stream-climate-change-extreme-weather-study

      OOPSIE 🤷‍♂️

  4. Harold Jarson

    Fucking fucker Pierre and his fellow fucker Steve Milloy doesn’t realize kinetic energy increases with increasing temperatures and so that average velocity will increase as well. Basis statistical mechanics.

    1. Yonason

      It’s not the increase in energy at the poles, but the difference in energy between the poles and the equator that matters. And since the poles would warm faster than the equator, the resulting chaos of mixing should decrease as the poles warm.

      Also, see what Senex wrote, below.

      1. Yonason

        Oh, yes, I forgot to reference Stephen Richards, below.

  5. Senex

    Much of North America, aside from the coasts, consists of plains and lowlands. Weather and climate are largely affected by the seasonal interplay between warmer humid air masses from the South, and cold, drier air masses from the Arctic. With few large intervening geographical features,the loops and dips in the jet stream determine how far north the warm air masses travel, how far south the cold air reaches, and where the two meet.

    If the jet stream has moved 300 km north on average, that would result in warmer, more unsettled weather patterns across much of central North America, regardless of the level of CO2 in the atmosphere.

  6. oebele bruinsma

    Another claim down the drain.

  7. Stephen Richards

    Paradox. HH Lamb hypothesised that global cooling would cause the jet stream to become amplified and for blocking to become more common.
    He also said that global warming would weaken the jet stream because the temperature gradient would diminish.

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  9. John Dowser

    It’s unclear if this article engages in a straw man logic. The theory on the “weakening jet stream” seems to boil in publications down to variability in course, “wavier”, like meandering up and down. It’s not clear if jet wind speed predictions are actually being supplied. Possible the difference in terminology between wave, stream and wind. If so, it wold be interesting to list or cite any former wind speed predictions. And to add to this question mark: the described shift upwards would still be part of the “weak” theory as the stream develops at the transitions between the polar, Ferrel and Hadley circulation cells. It the thermal loop keeps shifting North, one would expect the colder zones have done so as well.

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