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Deep below our feet the fates of oceans and continents are decided in a titanic battle between heat and pressure. On the surface pressure usually wins, but not always. In some places heat prevails, causing islands like Hawaii or even massive hot spots that split landmasses and may have fueled the Permian-Triassic extinction. Scientists using a new technique may now be able to finally get details on these mammoth channels of flowing rock:
In the end, the researchers discovered finger-like channels of low-speed seismic waves flowing about 120 to 220 miles below the sea floor and stretching out in bands about 700 miles wide and 1,400 miles apart. ... "This global pattern of finger-like structures that we're seeing, which has not been documented before, appears to reflect interactions between the upwelling plumes and the motion of the overlying plates," said Lekic in a news release. "The deflection of the plumes into these finger-like channels represents an intermediate scale of convection in the mantle, between the large-scale circulation that drives plate motions and the smaller scale plumes, which we are now starting to image."

Originally posted to Daily Kos on Sat Sep 07, 2013 at 06:00 AM PDT.

Also republished by SciTech.

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Comment Preferences

  •  a little piece of Mars . . . (8+ / 0-)

    Science fans may be interested in this diary:

    "A space oddysey, or how a little piece of the planet Mars ended up on a shelf in my bedroom . . ."

    http://www.dailykos.com/...

  •  I wonder how the E&E report will address volcanoes (3+ / 0-)
    Recommended by:
    palantir, Dood Abides, Aunt Pat

    with recent studies showing that they actually may help cool Earth with sun-blocking particulates?  It seems like climate change misinformers are keen to blame warming on volcanic gases.

     Volcanoes

    •  Well, OF COURSE, volcanoes cause global warming (3+ / 0-)
      Recommended by:
      Aunt Pat, pixxer, GrindtheHills

      because that's the Fires of Hell leak out and obviously Satan is heating up the planet as part of a Demonic-Liberal plot to discredit good conservative Christians.  Duh.

      "Let's see what fresh fuckwittery these dolts can contrive to torment themselves with this time." -- Iain Banks, The Hydrogen Sonata

      by Rikon Snow on Sat Sep 07, 2013 at 07:11:40 AM PDT

      [ Parent ]

  •  Heartland types (4+ / 0-)

    The former public policy director and speechwriter for Enron, Rob Bradey, makes the rounds at climate denier blogs such as Climate Etc.

    It is fun to call him on his past misdeeds and telling him that he hasn't learned a thing.

  •  Hey Lady!!!! (3+ / 0-)
    Recommended by:
    Dood Abides, Aunt Pat, Neon Vincent

    http://www.theguardian.com/...

    Nasa's moon mission Ladee spacecraft blasts off successfully

    Moon mission the first to blast off from Virginia site as it sets off on month-long journey to reach lunar orbit

    Nasa's newest robotic explorer rocketed into space late on Friday night in an unprecedented moonshot from the state of Virginia.

    The Ladee spacecraft, which is charged with studying the lunar atmosphere and dust, soared aboard an unmanned Minotaur rocket a little before midnight.

    It was a change of venue for Nasa, which normally launches moon missions from Cape Canaveral, Florida. But it provided a rare light show along the east coast of the US for those blessed with clear skies.

    I want 1 less Tiny Coffin, Why Don't You? Support The President's Gun Violence Plan.

    by JML9999 on Sat Sep 07, 2013 at 06:40:18 AM PDT

  •  Hoping to break a personal sound barrier.... (2+ / 0-)
    Recommended by:
    Aunt Pat, KenBee

    ... this weekend, on my new Raptobike!!

    Dudehisattva...

    "Generosity, Ethics, Patience, Effort, Concentration, and Wisdom"

    by Dood Abides on Sat Sep 07, 2013 at 06:44:04 AM PDT

    •  set a PR today in 25 km (2+ / 0-)
      Recommended by:
      Dood Abides, RiveroftheWest

      1st time trial ever..ok, fun ride, but there was a timer so..it's a race...or...something. 1st time trial for me,  therefore PR, yay me!.....:>

      got beat by an old lady and a bunch of teenagers. and their mom. the kids actually did donuts to stay nearby..haha.

      The old lady, haha, she won in 46 minutes, I was 63 minutes...but here's the trick here, first time on a bike for her, she borrowed it and boom! went the dynomite. She crosstrains and wanted to test her fitness. She's 67years old iirc, I'm older. That's my excuse....dam kids.
        She's made of awesum sauce.

      Actually it was really fun, I was really happy with everybody, my expectations were really low but I loved it and can't wait for another one. Good gear, nice people, beautiful scenery.... And it was foggy, yay!  

      This machine kills Fascists.

      by KenBee on Sat Sep 07, 2013 at 05:56:02 PM PDT

      [ Parent ]

      •  AWESOME!! (2+ / 0-)
        Recommended by:
        RiveroftheWest, KenBee

        I've never competed... most events won't allow 'bents, but I'm not that interested... I have 2 centuries under my belt 2 years ago, both by myself...

        Good gear, nice people, beautiful scenery.... And it was foggy, yay!  
        'nuff said!

        I'll share this YouTube with you:

        "Recumbents Can't Climb"

        Dudehisattva...

        "Generosity, Ethics, Patience, Effort, Concentration, and Wisdom"

        by Dood Abides on Sat Sep 07, 2013 at 07:25:44 PM PDT

        [ Parent ]

        •  aaaah, perfect as my real' road bike is a clapped (2+ / 0-)
          Recommended by:
          OceanDiver, RiveroftheWest

          out 92 Lightning recumbent with skinny really hard tires. It would have probably collapsed (I'm a svelte 250) on the fast downhill with potholes and ridges, very rough at any speed especially top. Stand and surround the grips, don't try to hold on, just arrive at the other side together.

          I can't wait to try it on this course, my knobby 2" tires roll pretty well with the built in center straight part, but still, I need to know. But it wasn't a race: it's always a race. :>

          Thanks for the video and enjoy your bike, I will hear more about it I hope...? I was following the Race Across America this year and Maria Parker's amazing ride,...athlete of the year I say!...speaking of fwd recumbents.

          Just remembered:
          There was an older fella who also went out fast and was maybe third...I just remembered I saw him later at lunch and he said 'did you get lost?'...I think he was friendly kidding as I had ridden around the town for an hour...but next time, he's going down!!!grrrr!!!

          Later I watched some younger friends playing bike polo, what a crackup that is, you should do it...I am gonna practice after dark somewhere behind a county building at night and weekends so when I show up I won't be laughed at...very much. They are really nice, men and women play, beginners are happily tolerated and encouraged and it's a blast watching. It was not anywhere near as violent as I was expecting, just a couple of getoffs at low speed, one bruise and some sore fingers...no biggy and smiles all around. The back alleys and rough trails I ride I fall off and jump off more times than that per day so..

          This machine kills Fascists.

          by KenBee on Sun Sep 08, 2013 at 02:54:53 PM PDT

          [ Parent ]

  •  So what is behind those "hotspot" volcanoes? (2+ / 0-)
    Recommended by:
    Dood Abides, Aunt Pat

    Since the 1980s geologists have been more alert to impacts from large meteors or asteroids and their affects on Earth history.
    I am no geologist. But I feel we are still underestimating the impacts of impacts.

    Here is a hypothesis (I have no evidence to call it a theory):
    Some hotspot volcanic zones such as Hawaii, Yellowstone and perhaps this massive one in the northwest Pacific are the result of impacts. Big ones. Enough to rattle the crust right down to the mantle. Thus creating the hot spot.
    You heard it here first.

    If you don't want it printed, don't let it happen.

    by EZ writer on Sat Sep 07, 2013 at 06:50:50 AM PDT

  •  Thanks for all the gret science info!! Also, (1+ / 0-)
    Recommended by:
    Aunt Pat

    I thought that this caller into C-Span summed things up Economics wise this morning. Here's his commentary, along with the milquetoast, and fairly predictable response of the show's guest:

    9.7.13

    Peter from Lakeland FL, Democrats line:

    "I have a real quick statement and then an example.

    "I will never vote for anybody again who isn’t against ending these free trade agreements, and bringing back tariffs. The middle class has been wiped out over the last twenty years. And here’s my example. American corporations pit American workers against slaves. Look at Bangla Desh, Walmart workers.. 1,128 Walmart workers in Bangladesh are crushed to death in a collapsed building, make pennies an hour. And do you know what the Walmart CEO said as they were pulling out the bodies? 'Move it down the street.'

    "Now if we bring back tariffs, we could start funding Social Security, use that money, fund it maybe so we don’t have to work until we’re 75, and maybe we could retire. Maybe we could have a middle class. Our educated college students are pitted against H1B visa workers who have no student debt. We’ve been wiped out, and the billionaires are making out on it. They offshore the profits to the Kamen Islands and Switzerland, so they’re not even paying taxes on it. And the American middle class is wiped out.

    "Could your guest please respond?"

    Sudeep Reddy (WSJ – Econopmics Reporter):

    "That is actually an, overall, excellent point about some of the tensions with the policy the United States has been on for the last 15 or 20 years. One of the rationales for supporting the World Trade Organization, for supporting freer trade in the 1990’s was that, by bringing more countries in to a common framework, then those countries might be forced to improve their working standards, to actually level the playing field for the people who are in these factories. And that has actually happened to some extent. But not nearly enough, and that’s the case that you site in Bangladesh. You see this all over the world, particularly in Asia, where people are working in some horrible, horrible conditions. And that’s a pretty clear indication that this 15 year effort to raise living, uh standard… working standards of people in these countries hasn’t completely succeeded.

    "As to your other point, whether you’re gonna see a party step up and say no to free trade, and start slapping tariffs on products coming into the United States, I think it’s highly unlikely you’ll se a major party doing that. You are probably going to be looking at third party or lesser candidates, uhm, if you wanted to find a candidate who would actually support something like that. And that’s partly because our economy has already been built up with many of our major employers relying on their operations around the world, and they obviously have quite a bit of influence. And also, it’s not clear, uh, economically, that you would see that much benefit at this point, given where we are, by  suddenly throwing tariffs on products, because other countries are gonna do the same thing. And that’s gonna hurt US exports, and perhaps even lead to a downward spiral in trade, where you end up with massive trade wars that probably won’t do, uh, most people any good."

    This situation, the relationship between consumers and workers, seems well worthy of much serious discussion.

    Happy Weekend.

    "Have a good time... all the time." -Viv Savage

    by The House on Sat Sep 07, 2013 at 07:21:14 AM PDT

  •  Actually bonobos are one of our two closest (0+ / 0-)

    cousins. They and "regular" chimps are each others' closest relatives, and we branched off from them before they branched off from each other. Thanks for the link to those amazing images!

    http://news.sciencemag.org/...

    I'm mystified why this article in Science has bonobos "joining" chimps as our closest relatives. That branching order has been known for decades!

  •  Thanks DarkSyde (0+ / 0-)

    nosotros no somos estúpidos

    by a2nite on Sat Sep 07, 2013 at 09:13:37 AM PDT

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