Print 97 comment(s) - last by TheSpaniard.. on Jan 22 at 8:27 AM

Cold periods had fewer storms, natural ocean cycles the largest cause of hurricane variability.

I've always been skeptical of the view that global warming leads to stronger hurricanes. The argument behind it seems overly simplistic -- hurricanes feed off warm water, so warmer sea surface temperatures will lead to more frequent and powerful storms.

Elsewhere in our solar system, the exact opposite seems true. Blisteringly hot Venus, for instance, seems to have extremely weak storm activity, whereas icy Jupiter has massive hurricanes that last centuries, large enough to swallow the entire earth several times over. This is only suggestive rather than conclusive, but clearly there's more to storm activity than just raw temperature.

Basic thermodynamics helps to explain why. Storms are essentially large heat engines. It's not temperature that drives a heat engine, but differences in temperature. Global warming, which warms the poles more than the equator, would seem to decrease the latitude-based differential that helps drive a hurricane's rotational energy.

So went my pet theory, at least— but no hard data supported it.

However, the other side had no hard data either. While climate modelers claimed global warming might strengthen storms, actual hurricanologists were adamant that no actual evidence existed. Some pointed to research on wind shear, which suggested that a warmer climate would reduce the conditions that allow hurricanes to form, despite warmer surface water.

In 2005, one hurricanologist, Emmanuel Kerry, broke ranks and claimed to have actual proof that global warming increased hurricanes. For this, Time Magazine quickly named him "Man of the Year". However, last year Kerry publicly recanted his view, admitting that his earlier work was flawed.

With Kerry's renunciation, hurricane scientists were unanimous in their view that global warming wouldn't lead to measurably stronger storms.

But could it do the reverse? Could global warming actually reduce hurricane activity? A pair of Chinese researchers now says this very well may be true, at least for some parts of the earth.

The researchers, using a new branch of science they call "paleotempestology", looked backwards through several thousand years of the earth's history. Using sedimentary deposits, core samples from caves, and other geological proxies, along with documented historical records of hurricane landfalls, they built the longest record of hurricane activity ever constructed. They then correlated it to the varying temperature at each period..

On the global level, the researchers found no link between climate and hurricane activity. Surprisingly, though, cold periods such as the Little Ice Age had the most hurricanes, at least in some regions, a result the team said "begs adequate explanation".

However, the study found a strong link between natural patterns such as El Nino and hurricanes, a clear pattern of rising and falling activity on decadal time scales. These oscillations, known as "ENSO", tended to suppress and enhance hurricanes on a regular cycle, with the cooler "la Nina" years having the most activity.

The research was published in the Chinese Science Bulletin, and can be viewed here.

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RE: Close enough for gov'mint work
By TheSpaniard on 1/16/2009 8:37:53 AM , Rating: 2
someone defending themself from one of the mentioned groups

RE: Close enough for gov'mint work
By BeastieBoy on 1/20/2009 10:48:50 AM , Rating: 2
If you are someone who has to defend himself against the cops, then I think we would all be better off if you didn't have a gun.

RE: Close enough for gov'mint work
By thepalinator on 1/20/2009 11:05:17 AM , Rating: 2
That depends:

"A New York City police officer who shot a man to death in an argument over a parking space was convicted of murder Friday"

"Two former police officers were convicted in federal court Wednesday of participating in a robbery ring that disguised home invasions as drug raids"

"Cop convicted of 4 rapes, gets 440 years
He used his police computer to research rape victims before attacks"

Yeah, the majority of cops are just fine. So are the majority of citizens too.

RE: Close enough for gov'mint work
By omnicronx on 1/20/2009 2:36:01 PM , Rating: 2
"A New York City police officer who shot a man to death in an argument over a parking space was convicted of murder Friday"
So instead of a dead man that was shot by a cop over a parking space, you would be a dead man with a gun that was shot by a cop for a parking space... In situations like these, I don't see how a gun would help you anyways, its not like you are going to expect it.

By TheSpaniard on 1/22/2009 8:27:29 AM , Rating: 2
yes but situations of police brutality are all too common these days (real or not, the people could be faking)

this encourages police to be honest...

the bad guys will always have weapons... we are arming the honest ones

also without an armed public how would you fullfill your constitutional obligation to overthrow a tyranical government?

"This is from the It's a science website." -- Rush Limbaugh

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