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For the First Time On Record, Human-Caused Climate Change Has Rerouted an Entire River (washingtonpost.com)

A team of scientists on Monday documented what they're describing as the first case of large-scale river reorganization as a result of human-caused climate change (Editor's note: could be paywalled; alternative source). From a report: They found that in mid-2016, the retreat of a very large glacier in Canada's Yukon territory led to the rerouting of its vast stream of meltwater from one river system to another -- cutting down flow to the Yukon's largest lake, and channeling freshwater to the Pacific Ocean south of Alaska, rather than to the Bering Sea. The researchers dubbed the reorganization an act of "rapid river piracy," saying that such events had often occurred in the Earth's geologic past, but never before, to their knowledge, as a sudden present-day event. They also called it "geologically instantaneous." "The river wasn't what we had seen a few years ago. It was a faded version of its former self," lead study author Daniel Shugar of the University of Washington at Tacoma said of the Slims River, which lost much of its flow because of the glacial change. "It was barely flowing at all. Literally, every day, we could see the water level dropping, we could see sandbars popping out in the river."

35 of 256 comments (clear)

  1. Oh, this is going to be great by Opportunist · · Score: 3, Funny

    Pass the popcorn!

    --
    We used to have a Bill of Rights. Now, with the rights gone, all we have left is the bill.
    1. Re:Oh, this is going to be great by h33t+l4x0r · · Score: 2, Insightful

      I'm waiting for the climate deniers to show up and tell us why this is a good thing.

    2. Re:Oh, this is going to be great by CrimsonAvenger · · Score: 4, Insightful

      Addendum to my last:

      Note that I live near the Mississippi River, which, until it was leveed all to hell-and-gone, routinely shifted its channel from year to year. So the notion of a river rerouting itself isn't terribly surprising to me, nor is it really that big a deal, unless it reroutes itself over someone's house or a town (which the Mississippi used to do from time to time in the 19th Century).

      --

      "I do not agree with what you say, but I will defend to the death your right to say it"
    3. Re:Oh, this is going to be great by mi · · Score: 3, Interesting

      Good or bad, what proof is there, this is indeed "human-caused"?

      --
      In Soviet Washington the swamp drains you.
    4. Re:Oh, this is going to be great by Billy+the+Mountain · · Score: 2

      *Yawn* Wake me up when the mississippi empties out more than 1000 miles from where it used to.

      --
      That was the turning point of my life--I went from negative zero to positive zero.
    5. Re:Oh, this is going to be great by QuasiEvil · · Score: 3, Informative

      Nah, because through the power of bigger engineering, we can put the bastard back. The Miss would have jumped over to the Atchafalaya channel years ago if it wasn't for engineering intervention.

    6. Re:Oh, this is going to be great by Rei · · Score: 3, Interesting

      Here in Iceland we got a new highest waterfall out of the deal. Our highest used to be Glymur, but the glacier Morsárjökull receded up a cliff and in its place left a series of waterfalls that are higher than Glymur (now called Morsárfossar).

      Glymur is prettier though. Morsárfossar was prettier partially glaciated, like the cliffs to the right still are.

      --
      Very well; let this abomination unto the Lord begin!
    7. Re:Oh, this is going to be great by EzInKy · · Score: 2

      Only beavers are allowed to alter to suit their needs.

      --
      Time is what keeps everything from happening all at once.
    8. Re:Oh, this is going to be great by Travelsonic · · Score: 2

      Not TRYING to be snarky, but can we not be so lazy as to truncate a word that changes the context of a word completely? Climate **CHANGE** - "climate denier" sounds utterly stupid on every level.

      --
      If you believe in privacy, and believe you have "nothing to hide" at the same time, you're a goddammed idiot
    9. Re:Oh, this is going to be great by Gadget_Guy · · Score: 4, Informative

      Good or bad, what proof is there, this is indeed "human-caused"?

      You can at least start with the IPCC report for a round-up of the science, then look at the scientific journals that have been published since then for any updates that have been made.

    10. Re:Oh, this is going to be great by Uberbah · · Score: 2

      Note that I live near the Mississippi River, which, until it was leveed all to hell-and-gone, routinely shifted its channel from year to year.

      Has it routinely emptied across another continental divide? Nope. Then what's your point?

    11. Re:Oh, this is going to be great by Anonymous Coward · · Score: 3, Insightful

      With claims it's "human-caused" without any scientific basis. And all these smart people lauding this shit can't answer how much of it is human contribution. Is it 5%? 100%? I'm not denying climate change, hell, i'm not denying that it's in part human cause... but screaming that human-caused climate change rerouted a river is a fucking hyperbole.

    12. Re:Oh, this is going to be great by Joce640k · · Score: 3, Informative

      Good or bad, what proof is there, this is indeed "human-caused"?

      It's not like you intend to read it.

      --
      No sig today...
    13. Re:Oh, this is going to be great by arglebargle_xiv · · Score: 2

      The Miss would have jumped over to the Atchafalaya channel years ago

      Is that the one that looks like a shark?

    14. Re:Oh, this is going to be great by Barsteward · · Score: 2

      show us all your research that shows otherwise .. or all your post is " fucking hyperbole."

      --
      "The hands that help are better far than lips that pray." - Robert Ingersoll (1833-1899)
    15. Re:Oh, this is going to be great by jandersen · · Score: 4, Insightful

      Note that I live near the Mississippi River, which, until it was leveed all to hell-and-gone, routinely shifted its channel from year to year. So the notion of a river rerouting itself isn't terribly surprising to me, nor is it really that big a deal, unless it reroutes itself over someone's house or a town (which the Mississippi used to do from time to time in the 19th Century).

      Sure, but this is well known from rivers that run over a plain - they tend to meander, silt builds up etc. The effect is rather more dramatic when the source dries up or goes to another river. It is the same, basic processes that are behind, but whereas the meandering river phenomenon is common, the interesting thing about this case is that it can be attributed directly to climate change: the glacier has melted away to such a degree that it now drains away through an entirely different channel. It would be great if people would not be so dismissive about these things - the scientists that bring these things up don't do so in order to get high approval rating on social media; they aren't airheaded celebrities craving attention; they point out observations that they think are potentially important, and which they suggest you should have a look at. It may feel great saying stuff like 'Yeah, shit happens; so what?" - right until the day when shit happens to you, particularly if you could have done something about it if only you could have been bothered.

    16. Re:Oh, this is going to be great by KeensMustard · · Score: 3, Informative

      Good or bad, what proof is there, this is indeed "human-caused"?

      Whose fault is it if you are ignorant of the basic science of climate?

    17. Re:Oh, this is going to be great by Truth_Quark · · Score: 3, Informative

      Well:
      1) If you measure all the sources of radiative forcing, you see that the natural ones are pretty much negligible with respect to the current warming, where as the "human-caused" ones are large.

      2) There have been papers that split the warming into the warming that would have happened from natural forcing, and that which would have happened from anthropogenic forcing. ((paper). Satisfyingly, the warming that has happened from the sum of the forcings, is approximately the sum of the warmings from each forcing. So it's nice and additive, therefore statements like "x% of the warming of the past y years is anthropogenic" are meaningful. Such as "80% of the warming of the past 100 years is anthropogenic" or "110% of the warming of the past 50 years is anthropogenic".

    18. Re:Oh, this is going to be great by Truth_Quark · · Score: 3, Insightful

      With claims it's "human-caused" without any scientific basis.

      No, showing the reasoning with references to the hundreds of peer reviewed scholarly papers that provide the basis for that reasoning is with scientific basis.

      "Without scientific basis" means without reference to the scholarly literature, and generally also without sound reasoning or true axioms.

      And all these smart people lauding this shit can't answer how much of it is human contribution. Is it 5%? 100%?

      As of 2000 it's about 80% of the past 100 years, and about 110% of the past 50 years.

      I'm not denying climate change, hell, i'm not denying that it's in part human cause... but screaming that human-caused climate change rerouted a river is a fucking hyperbole.

      The current climate change is human caused. That's not hyperbole. It's certainly not fucking hyperbole. And calling something fucking hyperbole without any scientific basis is ironic considering how your post began.

    19. Re:Oh, this is going to be great by Truth_Quark · · Score: 2

      What makes you think that they haven't produced reports stating what proportion of the CO2 in the atmosphere comes from what source.

      The oceans and terrestrial biosphere are net carbon sinks. They have sunk 55-60% of the carbon emitted by the combustion of fossil fuels and land use change.
      All the increase is due to human activity. Natural systems are balancing some of it. (Hence ocean acidification and CO2 fertilization).

      In the past 50 years, the fraction of CO2 emissions that remains in the atmosphere each year has likely increased, from about 40% to 45%, and models suggest that this trend was caused by a decrease in the uptake of CO2 by the carbon sinks in response to climate change and variability.

    20. Re:Oh, this is going to be great by Truth_Quark · · Score: 2

      It's Trillions less than WWI, WWII, or any number of volcanic eruptions *alone*

      And here we see an example of complete bullshit.

      Human emissions are 120 times volcanic eruptions.

      According to the U.S. Geological Survey (USGS), the world’s volcanoes, both on land and undersea, generate about 200 million tons of carbon dioxide (CO2) annually, while our automotive and industrial activities cause some 24 billion tons of CO2 emissions every year worldwide. - Scientific American.

  2. geologically instantaneous by turkeydance · · Score: 2

    THAT'S the band's name.

  3. A slam-dunk! by Anonymous Coward · · Score: 2, Informative

    "The researchers found only a minuscule probability that the retreat of Kaskawulsh glacier — which retracted by nearly half a mile from 1956 to 2007 — could have occurred in what they called a “constant climate.” They therefore inferred that the events in question could be attributed to human-caused climate change."

  4. Chain of conclusions by iMadeGhostzilla · · Score: 3, Insightful

    "The researchers found only a minuscule probability that the retreat of Kaskawulsh glacier — which retracted by nearly half a mile from 1956 to 2007 — could have occurred in what they called a “constant climate.” They therefore inferred that the events in question could be attributed to human-caused climate change."

    So they think it's unlikely to have occurred in a "constant climate", and among the imaginable range of non-constant climates they hinted the events *could* be attributed to "human-caused climate change". (Whatever that exactly means, given that there are infinite causes of climate change, many of them significant.)

    So, logically, WaPo titles the article "For the first time on record, human-caused climate change has rerouted an entire river." Good job, journalists.

    1. Re:Chain of conclusions by Gravis+Zero · · Score: 5, Informative

      Also I wonder how on-clock we believe these cycles have been coming in the past. Have they all been well within that 15% estimated drift of today? 15% doesn't sound like much for a system so incredibly complex. I may be wrong.

      Sounds like you don't really know just how fucked thing have become. Using ice core samples, they were able to calculate how much atmospheric CO2 there was in the past. Here's a graph of it including our really fucked present.

      --
      Anons need not reply. Questions end with a question mark.
    2. Re:Chain of conclusions by Namarrgon · · Score: 4, Informative

      Also:
      - Watch sea levels rise
      - Watch unprecedented king tides and storm surges destroy billions in coastal property
      - Watch millions of coastal & river delta farmers lose their farms due to salt
      - Watch global threat levels rise from increased resource conflicts
      - Watch temperatures rise
      - Watch tropical diseases spread to new areas
      - Watch unique and valuable reefs bleach and die
      - Watch billions of tourism dollars disappear
      - Watch rainfall patterns change drastically
      - Watch farmers try to cope with drought & floods like they've never seen before
      - Watch rising ocean acidification attack crucial food-web ecosystems
      - Watch rising risks of runaway feedback from e.g. Siberian methane traps
      - Watch deniers eventually change their tune to "oh well, it's too late to do anything now"

      --
      Why would anyone engrave "Elbereth"?
    3. Re:Chain of conclusions by Namarrgon · · Score: 2

      For the last 400 thousand years, atmospheric CO2 has varied regularly by +/- 60 ppm. We are now 105 ppm (30%) past the highest recorded levels, and you think that's a "tiny increase"?

      --
      Why would anyone engrave "Elbereth"?
  5. geologically instantaneous is nothing new by pyroclast · · Score: 2

    These events are normally considered geologic hazards: earthquakes, landslides, floods, etc. These are hazards because of the impact they have on us and our way of life, same is considered with climate change, how much will this change impact us and are we okay with that. So the question is, how will this impact us and since it's up were people are not, nothing much will come from this other than more evidence there is a rapid change to the environment. We always need more data to improve our understanding, this gives us that.

  6. Re:In 1913 by Koby77 · · Score: 3, Insightful

    >>saying that such events had often occurred in the Earth's geologic past, but never before, to their knowledge, as a sudden present-day event.

    And also we're now going to blame ANY climate change on mankind, even if it happened in the past, and even though the earth's climate has been constantly changing for the past 5 billion years.

  7. Stilt houses on Deltas and flood plains by peterofoz · · Score: 3, Informative

    In many parts of the world from India and Bangladesh, Indonesia and South America, rivers changing course is a common occurrence and the residents there have learned to build their houses on stilts to avoid flooding. As silt builds up and dams the flow of part of a river on mostly flat terrain, the water will find a new path of least resistance to the sea.

    1. Re:Stilt houses on Deltas and flood plains by Uberbah · · Score: 2

      And perpetual motion is real, and cheap clean affordable fission energy is only 20 years away.

      Your hand waiving is noted. The only losers in a wholesale move are shareholders in fossil fuel companies and the rich who might have to pay some higher taxes. Meanwhile the rest of the economy would see the greatest boom since the post-WWII era. Kind of a no-brainer.

  8. Dam! by Fly+Swatter · · Score: 2

    Did it first.

  9. Not a "climate change denier", not alarmist either by mpercy · · Score: 2

    Even if warming is part of a natural cycle, it does seem quite likely that man is exacerbating the situation with CO2 emissions and other pollution. If nothing else, if we could really run our societies without belching pollution into the atmosphere, it'd be the better alternative. I mean, pollution is just bad, m'kay?

    So please don't call me a "denier". My issue is that few of the proposed "solutions" seem to be based on science. I see the occasional discussion of carbon sequestration and that sort of thing, but far more often the "solution" is just a cloak hiding the proposer's socialist SJW motives.

    For example, the IPCC report on climate change...Let's see...it doesn't seem to be about the effect of climate on plants and animals (and humans). It does mention climatey things... It said that without action to address the problem, by the year 2100, hundreds of millions of people could be affected by coastal flooding and displaced due to land loss. "Impacts from recent extreme climatic events, such as heat waves, droughts, floods, and wildfires, show significant vulnerability and exposure of some ecosystems and many human systems to climate variability," the report warned.

    But mainly, the IPCC report seems to be about poverty and income inequality and funding needed to address it.

    The report also said climate change had the largest impact on people who are socially and economically marginalized. "Climate change will exacerbate poverty in low and lower-middle income countries, including high mountain states, countries at risk from sea-level rise, and countries with indigenous peoples, and create new poverty pockets in upper-middle to high-income countries in which inequality is increasing," [the report] said.

    But funding needed to offset the impact of climate change is lacking, the report warned, saying developing countries would need between $70 billion to $100 billion a year to implement needed measures. And efforts to reduce the effects of climate change would only have a marginal effect on reducing poverty unless "structural inequalities are addressed and needs for equity among poor and nonpoor people are met."

    It's not about climate change or environmentalism, it really hasn't been for a long time...it's about socialist economic policy--redistribution of wealth. The leaders of the movement readily admit as much.

    (OTTMAR EDENHOFER, UN IPCC OFFICIAL): Basically it’s a big mistake to discuss climate policy separately from the major themes of globalization. The climate summit in Cancun at the end of the month is not a climate conference, but one of the largest economic conferences since the Second World War... First of all, developed countries have basically expropriated the atmosphere of the world community. But one must say clearly that we redistribute de facto the world’s wealth by climate policy. Obviously, the owners of coal and oil will not be enthusiastic about this. One has to free oneself from the illusion that international climate policy is environmental policy. This has almost nothing to do with environmental policy anymore, with problems such as deforestation or the ozone hole.

    Christiana Figueres, leader of the U.N.’s Framework Convention on Climate Change: “This is probably the most difficult task we have ever given ourselves, which is to intentionally transform the economic development model, for the first time in human history.”

    Former U.S. Senator Timothy Wirth (D-CO), then representing the Clinton-Gore administration as U.S undersecretary of state for global issues, addressing the same Rio Climate Summit audience, agreed: “We have got to ride the global warming issue. Even if the theory of global warming is wrong, we will be doing the right thing in terms of economic policy and environmental policy.”

    Christine Stewart, former Canadian Environment Minister: “No matter if the science is all phoney, there are collateral environmental benefits.... climate change [provides] the greatest chance to b

  10. it's politics, obviously by argStyopa · · Score: 2

    No, the river course was changed by glacial melting and retreat.

    The cause of that was clearly warming.

    The cause of that is still open for debate. Was it exacerbated or caused by human activity - your answer, and the certainty with which you issue it depends on whether you're a member of the AGW secular religion.

    --
    -Styopa
  11. Re:Not a "climate change denier", not alarmist eit by SoftwareArtist · · Score: 2

    I see the occasional discussion of carbon sequestration and that sort of thing, but far more often the "solution" is just a cloak hiding the proposer's socialist SJW motives.

    Why are you making things up? Most of the solutions being proposed have nothing to do with socialism. By far the most popular proposal among economists is a carbon tax, which is about as non-political and pro-market as you could ask for. Make people pay for the damage they do to the environment, then let the market figure out the best way to deal with it. Other popular proposals include things like raising the fuel efficiency standards for cars, subsidizing renewable energy, increased funding for energy research, etc. If you think those are socialism, you have a strange idea of what the word means.

    But instead you just give quotes from a bunch of people I've never heard of with titles like "former leader of the Communist Party USA" and "climate justice campaigner". Couldn't you have quoted present day, mainstream political figures instead? Of course not, because they don't believe those things. But since mainstream politicians aren't socialists, instead you quote a bunch of socialists, pretend they reflect the views of mainstream politicians, and then claim this discredits anyone who actually wants to do something about climate change.

    --
    "I'm too busy to research this and form an educated opinion, but I do have time to tell everyone my uninformed opinion."