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NASA: Global Warming Is Now Changing How Earth Wobbles (go.com)

An anonymous reader writes: A new study from NASA finds global warming is shifting the way the Earth wobbles on its polar axis. Melting ice sheets are changing the distribution of weight on Earth, which has caused both the North Pole and the wobble, called polar motion, to change course. Since 1899, scientists and navigators have been accurately measuring the true pole and polar motion and for almost the entire 20th century they migrated a bit toward Canada. That migration has changed with this century -- now they're moving toward England, said study lead author Surendra Adhikari at NASA's Jet Propulsion Lab. "The recent shift from the 20th-century direction is very dramatic," Adhikari said. NASA scientist and the study's co-author Eirk Ivins said, Greenland has lost on average more than 600 trillion pounds of ice a year since 2003 and that affects the way the Earth wobbles in a manner similar to a figure skater lifting one leg while spinning.

11 of 232 comments (clear)

  1. Simple answer shift masses. by MouseTheLuckyDog · · Score: 3, Funny

    Just setup massive garbage dumps and prisons on Greenland.

    Move all our garbage and prisoners there. The extra mass should rebalance things.

  2. Re:So does Earth Quakes by bluefoxlucid · · Score: 3, Insightful

    Actually, if he pulled together data and published a research paper, he'd get chucked in the kook bin. Welcome to climate science.

    We chuck a lot of people in the kook bin, from vaccines-cause-autism whackjobs right up to those people who... well, invented vaccination. We've got a pretty bad track record for figuring out whose science is bullshit and whose is valid.

  3. Re:The earth's chucking a wobbly! by MightyMartian · · Score: 3, Insightful

    How is it a strawman? Particularly the latter point, that climatologists are compromised because they work by and large with government grants is brought up all the time as a counter to AGW research. For chrissakes, that claim is trotted by pseudo-skeptics in fields like geology, evolution, and cancer research.

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  4. Re:The earth's chucking a wobbly! by riverat1 · · Score: 3, Insightful

    Of course that is what a lot of us that are being called "denialist", which just FYI is an regressive term designed to shut down discussion by comparing anybody that doesn't buy magic beans to Holocaust deniers, ...

    It's the climate science deniers that are trying hard to make the link between denial in general and Holocaust denial specifically so they can look like a persecuted minority.

  5. Re:Shifting masses by LynnwoodRooster · · Score: 5, Interesting

    Water extraction would be much worse. It's shifting a resource from 30% of the surface to the other 70% of the surface. And it's done at a much higher rate than oil extraction. For example, in the year 2000 a total of 26 cubic kilometers of water was pumped from just the Ogallala aquifer alone. That amounts to around 450 million barrels a day - compared to around 90 million barrels a day of oil worldwide. And given the fact that water is 10-15% denser than oil - we have a mass shift of around 6:1 in favor of just the Ogallala aquifer water versus worldwide oil. Total water shift worldwide is probably closer to 60:1.

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  6. Re:The earth's chucking a wobbly! by PopeRatzo · · Score: 5, Informative

    The 2012 GOP platform clearly endorses alternative, renewable energy.

    And by "endorse", I assume you mean, "doing everything they can to kill renewable energy".

    http://usuncut.com/news/solarc...

    http://www.scholarsstrategynet...

    https://newrepublic.com/articl...

    http://mic.com/articles/130336...

    Plus, both of the leading GOP candidates for president, Donald Trump and Ted Cruz, are climate deniers.

    https://youtu.be/J_xVWfGjk0o

    https://youtu.be/KyulquUwi1Q

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  7. Re:Shifting masses by riverat1 · · Score: 4, Informative

    Sea ice has expanded around Antarctica (although not so much in 2015) but sea ice has no effect on gravity because it displaces an equal amount of water to its weight. And despite a recent paper about expanding ice on the East Antarctic ice sheet the GRACE satellites show that the ice sheet overall is losing mass.

  8. Re:Is there nothing... by HiThere · · Score: 4, Insightful

    Depends on what you're measuring. If you're measuring rainfall, it's climate change. If you're measuring temperature it's global warming. And, of course, newspapers are notorious for abusing the language. Consider the term "hacker".

    Actually, it could always be climate change, but calling it global warming when you're talking about rainfall is just confusing.

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    I think we've pushed this "anyone can grow up to be president" thing too far.
  9. Re:Dramatic shift? Nothing like magnetic reversal? by Anonymous Coward · · Score: 3, Interesting

    Bzzzzzzt.

    The Sun dumps visible light on Earth, which is absorbed, and re-radiated at a lower wavelength. The atmosphere is mostly transparent to visible light, and CO2 does squat to it. The atmosphere is opaque to IR pretty much to the edge of space; the "top of atmosphere" is where a given photon has a higher chance of being released to space instead of being captured and re-radiated. The effect of CO2 is not to increase the opacity of the lower atmosphere, which is already saturated with H2O and CO2, but to push the CO2-rich layer further out into space.

    You clearly know fuck-all about atmospheric physics. Why are you commenting?

  10. Re:The earth's chucking a wobbly! by PopeRatzo · · Score: 5, Informative

    Use a market-based approach to developing renewables

    Sure, just as soon as we use a "market-based approach" to fossil fuels, instead of providing taxpayer subsidies that dwarf those for renewables.

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    You are welcome on my lawn.
  11. Re:Nothing to worry about? by Livius · · Score: 3, Funny

    I can't imagine why they thought there was any point in telling Jor-El about the ice in Greenland, but it's no surprise he didn't have anything constructive to add.