Warming and Slowing the World

chrisleonard writes "We all know that global warming is supposed to heat the planet up, but did you know that it might also slow it down? According to a report from Belgium's Royal Observatory (as reported here by astronomy.com), if the days seem a little longer to you than they used to, it might not be just old age catching up with you. Would it be wrong to call the interaction of the world's warming temperatures and its slowing rotation ... a snowball effect?"

Comments

Someone must do something!

[Greyjack]

De Viron's team found that earthlings can expect the length of an average day to increase by 11 millionths of a second per decade, corresponding to an overall increase of about one ten-thousandth of a second by the close of the century.

Oh... my... GOD! The ramifications of this are... uh, on second thought, never mind.

Pshaw, I bet we could accelerate the Earth more effectively than that if we'd all get together on the first of every month, point all our cars West, and punch the accelerator simultaneously.

11 microseconds per decade?

[glitch!]

Wow, this hypothesis suggests that global warming may result in the Earth slowing down its rotation by 11 microseconds per decade. I had better make sure my earthquake insurance is paid up.

What they don't mention is how much NORMAL slowdown we can expect from other causes, such as the transfer of angular momentum from the Earth to the moon. I don't recall the numbers, but I am sure the moon will be a much larger factor than the variation in air currents.

Re:11 microseconds per decade?

[Anonymous Coward]

That's right. The length of the day increasing by 11us per decade is insignificant compared to the 2 milliseconds per century = 200us per decade increase due to the interaction with the Moon.

Also, cnn had the story 4 days ago.

Ok, some quick math.

[Restil]

1/10000 of a second every century we shall slow down.

This means, that to gain ONE SECOND of our preciously short day, we will have to wait 1 MILLION years. This means, that by the time the
sun explodes, our day will be approximately 83 minutes longer. I'm sorry if I choose not to get excited about this.

In retrospect, the earth's rotation is slowing due to other factors, primarily tidal forces from the moon at a rate of 22 seconds every million years. It will eventually slow to the point where it takes one month to make a complete revolution, in perfect tidal lock with the moon. Or at least it would, although its still unlikely to make it before the sun goes.

Either way, I don't plan to lose any sleep over it. Of all the scares from global warming, this is one of the least disconcerting.

-Restil

The study

[macdaddy]

I heard about a study that was talked about on Discovery about two common myths, global warming and deforestation. I haven't seen it on Discovery though. What it boiled down to was some time back a bunch of scientists and other *ologists (thousands) signed a paper saying that both were real and major problems. Supposedly it got press coverage out the ass. This Discovery special was about about another paper that came out right after the first (because of the first) from many many more thousands of scientists and other *ologists that said that both were a crock of shit, media and political propoganda. Oddly enough the media didn't give the 2nd paper much billing (I wonder why...). The 2nd paper and the people that signed it proved that deforestation was not a problem and that their research showed that our planet's tree population was far greater than it was in the 1920's and increasing rapidly. They of course did say that chopping down unexplored rain forests could very likely wipe out plant and animal life that had never been recorded. Of course that's no deforestation. They also proved that the Earth is not getting warmer. They proved that in fact the Earth is really getting colder. In the short term were are reaching the peak of some loop that I can't recall the name of. It's supposed to be some variation in the distance from the Sun we typically follow. It's not a round path we follow. It's more oval. Elyptical (sp?). And it varies over time and repeats itself. We're reaching the hotter part of that peak. We are however in the long run starting another Ice Age. Yes, it's true. All these record highs recorded this winter do not mean that the Earth is really warming. They don't support global warming in the least. We are actually cooling in the long run. We will have another ice age before the Sun starts growing to the point that it will cause Earth to heat up. The short time period has us getting warmer. The medium time period has us starting and ice age. The long term time period has the Sun frying our asses.

All these scientists that signed the 2nd paper discounted what the 1st guys said and they did it with an overwhelming number of people. Of course the media didn't cover that. The media never wants to cover something like that. Blood and guts sells. Death and destruction sells. Conspiracy sells. Telling the public that violence in schools is actually decreasing and is lower now than it was in the troubled 70s doesn't sell. Plastering a blood-splattered babbling kid on the evening news that "saw it all" sells.

Enough of my rambling. You've heard it all before. My question is, has anyone seen this Discovery episode? Does anyone know where more information can be had? I'd love to see the episode. It sounds like a good one. I still like the one that proved that something like 600 million years ago we had a Snow Ball Earth and the one that proved all human life as we know it today originated from deep within Africa. Both of those were good shows.