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Science

Climate Change Drives Bigger, Wetter Storms -- Storms Like Florence (npr.org) 270

Rebecca Hersher, reporting for NPR: Hurricane Florence is moving relentlessly toward the Southeastern U.S. It's a large, powerful cyclone that will likely bring storm surge and high winds to coastal communities. But climate scientists say one of the biggest threats posed by Florence is rain. "Freshwater flooding poses the greatest risk to life," explains James Kossin, an atmospheric scientist for the National Oceanic and Atmospheric Administration and the University of Wisconsin, Madison. And Florence could cause extensive freshwater flooding for two reasons. First, Florence is moving slowly, and could all but stop when it reaches land. "The storm could be over North Carolina and traveling incredibly slowly -- on the order of just a few miles per hour," explains Kossin, who says an official from the city of Charlotte, N.C., contacted him about rainfall projections for that city.

If Florence stalls over the Southeast, it would be reminiscent of Hurricane Harvey, which spent days dumping rain on the Houston region last year. Some areas ended up with more than 60 inches, a catastrophic amount of water that shut down the entire region and resulted in at least 93 deaths. Slow-moving storms like Harvey are getting more common. A study published earlier this year by Kossin found that tropical cyclones around the world have slowed down 10 percent in the last 70 years. "We're seeing that in every ocean basin except the northern Indian Ocean," says Kossin, possibly because climate change is causing the wind currents that hurricanes ride to slow down. If Florence slows down and stalls when it hits land, it will the latest example of that trend. Kevin Trenberth of the National Center for Atmospheric Research in Boulder, Colo., says global warming also affects the size and intensity of storms like Florence.

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Climate Change Drives Bigger, Wetter Storms -- Storms Like Florence

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  • by DaMattster ( 977781 ) on Tuesday September 11, 2018 @10:44AM (#57290136)
    Weatherbug was pretty careful not to make the leap that Florence is a result of climate change. They had an article speculating that the reason Florence became so strong is the result of a Bermuda high which is in an unusual position for the year. The article's author felts that the blocking high was keeping Florence over warmer water so it could strengthen. Typically September hurricanes turn back out to sea.
    • by Anonymous Coward on Tuesday September 11, 2018 @11:06AM (#57290308)

      And no matter if it's well supported, the politics of the rightwing does not allow AGW to be real. So lots of places won't dare to mention climate change as being the cause of ANYTHING, because the only things AGW deniers will allow climate to do is "change" in such a way that we don't do it. It sure as shit isn't allowed to DO anything. Just change.

      • by Anonymous Coward on Tuesday September 11, 2018 @12:27PM (#57290944)

        I remember, back in the day, we had back to back cat 4 and cat 5 hurricanes including Rita, Wilma and Katrina. Al Gore made a movie of it saying that this will happen from now on due to global warming. Then we had a 10 year span of no major hurricanes striking the east coast. We get one in a decade and all of a sudden the sky is falling again.

        • A cat 4 or cat 5 hurricane not hitting the east coast but moving north and turning out to outer sea, is stillma hurricane.
          And a taifune is just the same thing as an hurricane anyway. Ever looked on a global weather map, recently? We have about 15 active hurricanes/typhoons/fropical storms at the moment ...

      • And no matter if it's well supported, the politics of the rightwing does not allow AGW to be real. So lots of places won't dare to mention climate change as being the cause of ANYTHING, because the only things AGW deniers will allow climate to do is "change" in such a way that we don't do it. It sure as shit isn't allowed to DO anything. Just change.

        This is true but what also is true is the left is waiting for a bad hurricane so they can scream global warming and demand business controls, controls denied them when class warfare became a loser at the polls.

        In both cases, follow the money. Do not be a cog in either side.

        Global warming is a few percent in energy increase, and thus a percent of a percent in strength or number. It will take decades just to demonstrate a tiny increase in hurricane power or number.

        • and thus a percent of a percent in strength or number. It will take decades just to demonstrate a tiny increase in hurricane power or number.
          Rofl, again stpidity rules the world.

          Due to heating of the ocean, the hot area becomes bigger, do tue being hot more early, the storms form earlier in the year, which also means farer away from the coast, during the time they aproach, which is more time, because they form farer away, they have more time to grow.

          So, a 1% change in "global" energy levels easy increase t

    • Weatherbug was pretty careful not to make the leap that Florence is a result of climate change. They had an article speculating that the reason Florence became so strong is the result of a Bermuda high which is in an unusual position for the year.

      How do they/you square that belief with the report from Accuweather about Climate Change Impacting the Bermuda High [accuweather.com], causing it "intensify"?

      • by Nidi62 ( 1525137 ) on Tuesday September 11, 2018 @11:19AM (#57290392)

        Weatherbug was pretty careful not to make the leap that Florence is a result of climate change. They had an article speculating that the reason Florence became so strong is the result of a Bermuda high which is in an unusual position for the year.

        How do they/you square that belief with the report from Accuweather about Climate Change Impacting the Bermuda High [accuweather.com], causing it "intensify"?

        A short play with a metaphor for how climate discussions will look for the near future:

        Person A: "The house is flooding because of the rain pouring in".

        Person B:"Think it's because of the hole in the roof?"

        Person A:"I can't speculate on that."

        • Re: (Score:3, Insightful)

          Idiot righty - Big snow this year must be global warming! Ha Ha
          Idiot lefty - Huge hurricane this year, must be global warming! Panic!

          One thing is for sure is you're never going to get idiots stop confusing weather with climate.

          Weather - Snow, Hurricane, Rain, etc
          Climate - Arid, Tropical, etc
          • by Nidi62 ( 1525137 )

            One thing is for sure is you're never going to get idiots stop confusing weather with climate. Weather - Snow, Hurricane, Rain, etc Climate - Arid, Tropical, etc

            Would you not agree though that, as climate shifts (or changes), weather will inevitably change as a result? So therefore significant, unusual, or unprecedented changes in weather could very well indicate shifts in climate?

          • Define terms (Score:4, Insightful)

            by sjbe ( 173966 ) on Tuesday September 11, 2018 @01:28PM (#57291380)

            One thing is for sure is you're never going to get idiots stop confusing weather with climate.

            True but here's the thing. If you string enough weather events together it becomes climate. If the weather tomorrow is 70F and sunny, that is weather. If the weather for most of the next 500 days is 70F and sunny, that's climate. (also that's San Diego) If the accumulated weather events change enough to be statistically different than previous patterns then that is climate change. The only question is what number of accumulated weather events does it take to make a climate and what magnitude over what time period constitutes climate change? The problem is that there is no simple sound bite answers to those questions so idiots keep arguing about it because there is no standard definition in play.

          • Typical weather patterns belong to climate. E.G you never will have a hurricane in the center of the US or Canada or Siberia or China.

            Climate change most certainly leads to more tropical storms that evolve into hurricanes and taifoons. After all the only fuel a hurricane needs is warm water above 26.5C!

            The more often you have that, the more often you have a hurricane. The bigger the afea, the bigger the storm. The higher the water temperature the higher the wind speed and speed of forming.

            All no brainers ..

          • by jwhyche ( 6192 ) on Tuesday September 11, 2018 @03:43PM (#57292286) Homepage

            I've never understood why there is much of a debate at all on this subject. Global warning is ether real or it isn't. If its real then it is being driven by fossil fuels and that must be stopped. I've listened to idiots on both sides of the debate and it seems to me the answer is quiet clear.

            Fossil fuels are a major source of pollution and a major health hazard. They destroy out infrastructure and natural environments, and this is proven. Their use must be stopped because of this alone.

            Fossil fuels are a scarce resource that have a limit. Over time it will be harder to find new sources that can meet our ever increasing needs. This dictates that new sources of energy must be found.

            Both of these reasons alone dictate that better and cleaner sources of energy must be found. The argument on global warming is just a distraction to me.

            Our dependence on fossil fuels will end. This is a fact. We will ether poison ourselves by continuing to use them or we will run out. One way or another their use will end.

            Of course I guess going extinct or falling back to the stone age is also an option.

      • That study is interesting, but so too is this one, which shows Atlantic Hurricanes have NOT increased in size for the last 30 years:

        Graph (it's a flat line): https://s.w-x.co/wu/storm-size... [w-x.co]

        Original Link:
        https://www.wunderground.com/c... [wunderground.com]

    • Re: (Score:3, Insightful)

      by owlaf ( 5251737 )
      I really do think climate change is a real concern, but do hope people are a bit more cautious when to point finger of an event caused by it. If it turns out not to be so, it is just ammunition for the persistent deniers
    • Yeah, I heard the NPR report and the reporter made a few leaps which were her “value addeds” and weren’t based on the scientist’s comments... like climate change leading to warmer tropical waters (not really - models show warming away from the tropics, with the biggest jump in arctic areas).

      The possible link to large scale wind circulation changes - and slower storms because of it - is interesting though.

    • by hey! ( 33014 ) on Tuesday September 11, 2018 @11:50AM (#57290612) Homepage Journal

      In situations like this, people want an answer (or more accurately prefer an answer) to what is in itself a meaningless question: did climate change cause this.

      The way this argument is heading is fairly typical: people lining up behind sources that support the answer they want, without asking what the question actually means.

      If I am not mistaken, the biggest destructive effects of this storm will not be to wind (which is how hurricanes are graded on the Saffir-Simpson scale) but to rainfall, and the models predict greater rainfall more unambiguously than they predict greater wind intensity.

      But even given all that, you still can't say that greenhouse gases "caused" this without getting into a dense thicket of philosophical (the Wikipedia article on causality [wikipedia.org] is actually worth reading here) and geophysical technicalities.

      It's a pointless argument anyway. What we're really struggling over is whether this event means we should do something about greenhouse gas emissions. And for that causality is certainly a sufficient justification, but it's not strictly speaking necessary. It just has to be representative of the likely consequences of greenhouse gas emissions.

      • What we're really struggling over is whether this event means we should do something about greenhouse gas emissions.

        Let's put it this way. The con artist doesn't believe in climate change and his next big step is to curtail methane gas emission regulations.

        That said, he also used global warming (his words) as the excuse to build a sea wall for his failing Irish [politico.com] golf course [washingtonpost.com]:

        "If the predictions of an increase in sea level rise as a result of global warming prove correct, however, it is likely
        • by hey! ( 33014 )

          You know, I think the thing I hate most about the Trump presidency is how *everything* has to be about the Trump presidency.

    • by mixed_signal ( 976261 ) on Tuesday September 11, 2018 @12:05PM (#57290706)
      There is a difference between something "causing a storm" and "making storms more severe." There are few people if any saying climate change drives or causes new storms that wouldn't have occurred otherwise. But it's pretty obvious, and has been discussed for a long time now, that global warming means more heat and therefore more water and more energy in the atmosphere, which make storms more severe.
    • Weatherbug was pretty careful not to make the leap that Florence is a result of climate change. They had an article speculating that the reason Florence became so strong is the result of a Bermuda high which is in an unusual position for the year. The article's author felts that the blocking high was keeping Florence over warmer water so it could strengthen. Typically September hurricanes turn back out to sea.

      Think of a coin that's kinda weird aerodynamically so when you flip it it will land heads 70% of the time.

      Then you flip the coin 10 times and it lands heads 8 times. That's unlikely with an unbiased coin, but not impossible.

      So do you say the bias caused it to land heads 8/10? Do you say it contributed? Do you say we can't really comment at all?

      That's the basic discussion climate scientists are having right now.

      • by Mal-2 ( 675116 )

        Use a cylinder, then declare the side landings to be "heads". You have a three-sided coin, and by shortening or lengthening the cylinder, you can make it less or more likely to land on its side. No aerodynamic trickery is required, so this "three-sided coin" will work anywhere it has a flat, level surface to fall onto.

        But wait, that's not the same thing as messing with climate.

        If you can't distinguish between a heads landing and a side landing (they somehow look the same from outside), then it starts to l

    • by commodore64_love ( 1445365 ) on Tuesday September 11, 2018 @02:30PM (#57291748) Journal

      This study shows hurricanes have NOT increased in size (contrary to the title): https://www.wunderground.com/c... [wunderground.com]

      "Tropical cyclone size does not appear to have changed significantly over the past 35 years."

      Graph (it's a flat line): https://s.w-x.co/wu/storm-size... [w-x.co]

  • by Anonymous Coward on Tuesday September 11, 2018 @10:45AM (#57290142)

    The slow movement of Florence and possibility it stalls are not related to global warming to rather simply to the location of high pressure systems north of the storm preventing it from turning northward.

    The size of the storm could be argued to be greater due to warming, but its a statistical discussion about averages over time, not one of any particular storm.

    • Re: (Score:2, Informative)

      by drinkypoo ( 153816 )

      The slow movement of Florence and possibility it stalls are not related to global warming to rather simply to the location of high pressure systems north of the storm preventing it from turning northward.

      Gee, I wonder what's affected the location of those high pressure systems [robertscribbler.com].

    • Re: (Score:2, Interesting)

      by Anonymous Coward

      I believe there was a paper that said climate change could result in hurricanes moving slower. However, it is important to note that, as per Wikipedia, out on the most severe storms only 2 are from this century. In almost every metric the past century is worst then this one. If hurricanes are getting progressively worst you would think that records would be consistently broken.

      The only area in witch modern storms win is in monetary damage caused which is obvious when you realize how many more people live in

    • The slow movement of Florence and possibility it stalls are not related to global warming to rather simply to the location of high pressure systems north of the storm preventing it from turning northward.

      And it is believed that we are facing an unusual situation with the Bermuda High that may be caused by climate change that is doing this.

  • by King_TJ ( 85913 ) on Tuesday September 11, 2018 @11:22AM (#57290412) Journal

    I live in the Northeast and every time a reporter starts showing the people putting up sandbags and preparing, and they get interviewed? They say the same kinds of things. "Been through this a number of times before." The shop owners in places like Annapolis will show you how high flood waters have been, decades ago compared to the last few times they dealt with flooding. And predictions for this one seem to be, at most, somewhat equivalent to one of the higher water levels they saw long ago.

    This article talks about a worldwide slowdown of 10% noted in the last 70 years for hurricane movement? Might be completely true, but does that really signify man-made climate change as the culprit? Or would you see at least a 10% variance one way or the other, if you were tracking their speeds of travel in different time periods further back than the last 70 years? Either way, 10% doesn't seem like a huge difference? Assuming the amount of rainfall is directly related to how long the storm sits in a given area, or how much time it has to pick up ocean water as it travels? Wouldn't that mean it accounts for only 6 inches of extra rain from a 60 inch rainfall?

    • The shop owners in places like Annapolis will show you how high flood waters have been...

      Back when I visited Hawai'i in the '70s it wasn't at all unusual for there to be lines painted on the sides of buildings showing the high water marks for various tsunami. I'm surprised that the people in places like Annapolis haven't done the same thing, unless I've misunderstood what you posted.
    • by jeff4747 ( 256583 ) on Tuesday September 11, 2018 @02:45PM (#57291838)

      They say the same kinds of things. "Been through this a number of times before."

      When disaster approaches, people say things to comfort themselves. It helps when you're worried about your life being annihilated in a couple days, and there's little you can do about it.

      Also, "100-year" storms are a thing. The fact that there were "100-year" storms in the past doesn't mean much. What means something is the "100-year" storms now appear to be happening more like every 20 years.

      Wouldn't that mean it accounts for only 6 inches of extra rain from a 60 inch rainfall?

      Doesn't sound like much, does it?

      Now remember that 6 inches is over 1000 square miles. That's a hell of a lot of water.

      Now run all that water through the relatively small channels we call "rivers". That's a metric fuckton more flooding, because those 6 inches are concentrated into a relatively small area.

      A hurricane stalling overhead is an extremely bad thing.

  • Really? (Score:2, Troll)

    by argStyopa ( 232550 )

    When we point to cooler summers or warmer winters or a near-complete absence of tornadoes, the reply is "WEATHER ISN'T CLIMATE, YOU FUCKING DENIER"

    But somehow everytime there's a hurricane, we see posts and news stories about how this is driven by climate change.

    Funny.

    • Re: (Score:2, Offtopic)

      by Dutch Gun ( 899105 )

      It's sort of the opposite of how religious people thank God for everything good that happens in their lives, but don't seem to blame him when things go terribly wrong.

      • I'd agree that's a good analogy. Both groups are zealots uninterested in anything but flogging their particular creed to every passer-by.

        If there was such a thing as God, he's clearly a sadistic motherfucker.

      • Your argument seems to be "someone on the internet said something stupid ergo global warming isn't happening".

    • Yeah, but people say all sorts of stuff. That has nothing to do with accumulating and analyzing data, comparing models to history, making predictions, etc.
  • by Oh really now ( 5490472 ) on Tuesday September 11, 2018 @11:39AM (#57290530)

    slow moving and steady storms? C'mon climate "science" purveyors, get your shit straight and stop attributing EVERY weather event to 'climate change.' Want to know why intelligent people outside of your funding....er... "science" circles don't believe? (Just in case your science doesn't work out, that is called a rhetorical question).

    Science needs to be repeatable and provable, but nothing being trotted about as climate science is anything but half-assed theories and wild fear mongering. I genuinely want to know what are and are not effects of climate change, but I haven't seen anything beyond awful correlations based on fudged data. Call me when you have something based in, well, science.

    • You sound very sure of yourself. One counter point: The dips in the jet stream that are called "the polar vortex" were predicted a few years before they started happening. Maybe you should read up on or or talk with people in the climate science field and see what they are really up to.
    • C'mon climate "science" purveyors, get your shit straight and stop attributing EVERY weather event to 'climate change.'

      You're just paying attention to the wrong people. If you listened to actual climate scientists about the subject they don't attribute every weather event to climate change. They just say that when a weather event is embedded in a changing climate that is going to affect them.

    • by Mal-2 ( 675116 )

      Yeah. Because you should always run a control on a second planet, or it's not science!

  • Yeah, I'm sorry.

    Stop subsidizing multi-million dollar properties being built in flood plains or areas subject to storm surge. You have no way to change the weather and its habits. You could begin mass sterilization of third world countries too if it makes you feel better.

  • If it's "settled" it is not science, if it is science it is not settled.
    https://www.youtube.com/watch?... [youtube.com]

  • We know this already. Is this the new Slashdot? Rehashing the same worn out tales?

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