Want to read Slashdot from your mobile device? Point it at m.slashdot.org and keep reading!

 



Forgot your password?
typodupeerror
×
Earth

Atlantic Hurricane Season Is Running 50 Percent Below Normal Levels (arstechnica.com) 166

An anonymous reader quotes a report from Ars Technica: To state the obvious: This has been an unorthodox Atlantic hurricane season. Everyone from the US agency devoted to studying weather, oceans, and the atmosphere -- the National Ocean and Atmospheric Administration -- to the most highly regarded hurricane professionals (PDF) predicted a season with above-normal to well above-normal activity. For example, NOAA's outlook for the 2022 Atlantic hurricane season, which runs from June 1 to November 30, predicted a 65 percent chance of an above-normal season, a 25 percent chance of a near-normal season, and a 10 percent chance of a below-normal season. The primary factor behind these predictions was an expectation that La Nina would persist in the Pacific Ocean, leading to atmospheric conditions in the tropical Atlantic more favorable to storm formation and intensification. La Nina has persisted, but the storms still have not come in bunches.

To date the Atlantic has had five named storms, which is not all that far off "normal" activity, as measured by climatological averages from 1991 to 2020. Normally, by now, the Atlantic would have recorded eight tropical storms and hurricanes that were given names by the National Hurricane Center. The disparity is more significant when we look at a metric for the duration and intensity of storms, known as Accumulated Cyclone Energy. By this more telling measurement, the 2022 season has a value of 29.6, which is less than half of the normal value through Saturday, 60.3. Perhaps what is most striking about this season is that we are now at the absolute peak of hurricane season, and there is simply nothing happening. Although the Atlantic season begins on June 1, it starts slowly, with maybe a storm here or there in June, and often a quiet July before the deep tropics get rolling in August. Typically about half of all activity occurs in the 14 weeks prior to September 10, and then in a mad, headlong rush the vast majority of the remaining storms spin up before the end of October.

While it is still entirely possible that the Atlantic basin -- which includes the Atlantic Ocean, Gulf of Mexico, and Caribbean Sea -- produces a madcap finish, we're just not seeing any signs of it right now. There are no active systems at the moment, and the National Hurricane Center is tracking just one tropical wave that will move off the African coast into the Atlantic Ocean in the coming days. It has a relatively low chance of development, and none of the global models anticipate much from the system. Our best global models show about a 20 to 30 percent chance of a tropical depression developing anywhere in the Atlantic during the next 10 days. This is the exact opposite of what we normally see this time of year, when the tropics are typically lit up like a Christmas tree. The reason for this is because September offers a window where the Atlantic is still warm from the summertime months, and we typically see some of the lowest wind-shear values in storm-forming regions.
We'll have to wait until after the season to get a detailed analysis as to why it's been so quiet in the Atlantic, but the report suggests dust could be to blame. "[W]e've seen a lot of dust in the atmosphere, which has choked off the formation of storms," reports Ars. "Additionally, upper-level winds in the atmosphere have generally been hostile to storm formation -- basically shearing off the top of any developing tropical systems."
This discussion has been archived. No new comments can be posted.

Atlantic Hurricane Season Is Running 50 Percent Below Normal Levels

Comments Filter:
  • Climate change is real. We had an overly active hurricane season predicted due to climate change, but more climate change meant the science was wrong, and therefore we need more science.
    • Minor blip on an otherwise correctly predicted long term trend.
    • by q_e_t ( 5104099 )

      Climate change is real. We had an overly active hurricane season predicted due to climate change, but more climate change meant the science was wrong, and therefore we need more science.

      Last year it was unusually active. It varies year-to-year. The important thing to look at is the long-term trend.

  • Hurricanes are scary deadly. We are actually in the middle of peak season when the strongest hurricanes tend to develop.

    Weather depends on so many unknown variables. We can prepare for a hurricane because we know they are out there. But in reality the weather service just gives up probabilities, and we have to make decisions based on those. All the averages, the horse race reporting, is meaningless. We know a hurricane could form off the coast tonight and destroy a city tomorrow.

  • Meanwhile, over here in the Pacific, we're already at #12 with another 2.5 months to go.

  • by TigerPlish ( 174064 ) on Monday September 12, 2022 @11:19PM (#62876431)

    I've been following / dodging these things since David and Frederic in 1979. Then later on I became a meteorologist, and then I gave it up for IT.

    When David hit Puerto Rico, my fam were cowering in the house. I was 9 then, out in the front yard with my Polaroid One-Step, taking pictures of sideways rain and palm trees bending from the wind. I'd listen to the wx radio and plot them on maps from El Mundo -- a long-defunct newspaper. I'd compare the current plot with what the last forecast said would happen, and mark the difference.

    These things defy logic. It's too early to be crowing about how quiet it is. After all, when it's really eerily quiet, that's when Big Bad is revealed, yes?

    When it's December, then y'all can crow about how quiet it is.

    • Maybe after January. The whole unpredictability thing being what it is.

    • The good news is that no matter what happens, you can blame it on climate change!

      More hurricanes than average? Climate change. Fewer hurricanes? Climate change. Hurricanes later than usual? Climate change.

      Just to be clear, not dismissing the issue or that we're causing it, but it seems that any deviation from the mean is seen as further proof, whether it matches our predictions or not.

    • When it's December, then y'all can crow about how quiet it is.

      Tropical Storm Zeta [wikipedia.org] says hello.

  • by joe_frisch ( 1366229 ) on Monday September 12, 2022 @11:45PM (#62876451)
    Statistical significance is more than just seeing if the variation is larger than sqrt(N). Some systems have a lot of low frequecy noise which means you need to average for a very long time to see statistically significant fluctuations. If the noise is more pink than 1/f, you can't actually have an average that converges.

    This means you have to be very careful in interpreting the error bars on model predictions. This is all of course understood by the scientists in the fields, but possibly not by the non-scientist spokesmen who talk to the public
    • by CAIMLAS ( 41445 )

      How well understood do you think it is, though? The models and predictions based off those scientists have been predictably, consistently wrong for 50+ years.

      • Where do you see that? Not disagreeing, but have you found real papers comparing predictions with measurements. (not popular pieces in the media written by people with an agenda - on either side)
  • Yep. (Score:4, Interesting)

    by LeeLynx ( 6219816 ) on Tuesday September 13, 2022 @01:20AM (#62876571)
    Came here for the climate change skepticism, was not disappointed. Just like every cold winter day disproves global warming, 1 of 3 major oceans having a slow hurricane season definitely means climate change is BS. Because anecdotal evidence is the best-al evidence.
    • Spikes and dips in 'normal' activity can happen with or without climate change. The real issue is the severity of the weather events when they do happen, and weather events around the world have been increasing in severity.

      • Just curious, what did you think the point of my post was?
    • by CAIMLAS ( 41445 )

      Hey, it couldn't have anything to do with this year's solar cycle, could it? I mean: solar cycle severity (sunspot count, etc.) has been pretty well understood to correlate to the the Nina/el Nino cycle, as well as storm severity.

      That seems like a bit better predictor of what's going on than a statistical model which shows a 0.2% change in temperature over 20 years, with a 2% sd... don't you think?

      • by q_e_t ( 5104099 )

        Hey, it couldn't have anything to do with this year's solar cycle, could it? I mean: solar cycle severity (sunspot count, etc.) has been pretty well understood to correlate to the the Nina/el Nino cycle, as well as storm severity.

        Citation?

    • by tiqui ( 1024021 )

      Can't tell if you are being sarcastic, but allow me to assume you're not being sarcastic and point something out:

      Over the span of many years, the people most loudly advocating for drastic alterations of human activity (alterations that would in many cases have very certain and negative effects for millions/billions of people) to avert global disaster from man-made climate change have grabbed for, and used, nearly every weather event as "proof" of climate change (remember all the uses of hurricane Katrina?).

      • Climate = weather + time. Pointing to decades of increasing hurricane activity is not using weather events to support a climate argument. Pointing to the beginning of a single hurricane season is using weather to support a climate argument. So no, this is not an example of "using a person's own debate arguments against them when those arguments run against them". It's an example of seizing upon anything you can find to desperately relieve yourself of unpleasant knowledge; assailing it with increasingly sill
  • it's not that likely, but it's also not that unlikely - or nobody would ever have died from russian roulette.
    • it's not that likely, but it's also not that unlikely - or nobody would ever have died from russian roulette.

      There's not that many ten chamber revolvers out there

  • notice anything? (Score:2, Insightful)

    by argStyopa ( 232550 )

    "Busy hurricane season" = proof of climate change
    "Quiet hurricane season" = proof of climate change

    • by CAIMLAS ( 41445 )

      The important distinction is that the evil capitalists did it, you realize, so it has to be AGW. Climate change isn't enough, it needs to be something we can tax and form corrupt conglomerates to siphon money into for the betterment of the elite.

    • It's almost like climate science is complex, esoteric, and distinct from weather science, and maybe non-climate scientists (everyone else) shouldn't be constantly publishing and/or discussing weather stories which imply some connection either way.

  • 2006: Expect Another Big Hurricane Year Says NOAA”—headline, MongaBay .com, May 22, 2006

    2007: “NOAA Predicts Above Normal 2007 Atlantic Hurricane Season”—headline, National Oceanographic and Atmospheric Administration press release, May 23, 2007

    2008: “NOAA Increases Expectancy for Above-Normal 2008 Atlantic Hurricane Season”—headline, gCaptain .com, Aug. 7, 2008

    2009: “Forecasters: 2009 to Bring ‘Above Average’ Hurricane Season”—he

  • Is that weathermen and meteorologists still can't predict the weather.
    • But politicians think they can.

      • they then think they should implement policies that raise prices or reduce availability of energy and/or various substances.

        When energy becomes more expensive/less available there are real-world measurable effects that KILL real people in the here-and-now, rather than projected people in a possible future scenario in which people stupidly do nothing to mitigate effects.

        Every winter, elderly and poor people in North America and Europe FREEZE TO DEATH because they cannot afford to heat their homes to safe tem

  • Are we just going to pretend this is yet another sign of AGW, which just so happens to contradict what the AGW proponents say was supposed to happen according to their models?

    Are we just going to ignore the full system effect of things which result in "climate" - namely, solar behavior as well as global behavior - and focus exclusively on "those evil capitalists most evidently did it"?

    That's myopic as fuck, and really clearly indicates an unscientific approach.

    Look: are we just going to ignore the Hunga Ton

  • More evidence for global warming, because global warming.

  • Are you still considered a 'Climate Change Denier' if you think that the climate is changing, but are unconvinced that all the changes will result in catastrophic events? The climate has always changed and has been much warmer and cooler in the past. When did it get decided that the average temperature in 1900 (or pick any other date) was the ideal, and any change from it spells disaster? I find it interesting that the most alarmist people in the climate debate consider themselves progressive politically. I

To stay youthful, stay useful.

Working...