backtop


Print 31 comment(s) - last by TheEinstein.. on Jul 25 at 8:53 AM

Data suggests that unknown processes may be missing from prediction models.

If there's a topic that nearly everyone is familiar with this year, it's global warming. Advocates for this camp and that camp have been slinging mud and "facts" at each other at an increasing rate in the last few years as global awareness of the various theories behind it has risen. Though special purpose groups, scientists and Al Gore may not agree on what should be done, there are generally accepted numbers that climate researchers use to generate pictures of what kind of temperature the Earth will endure in the next century. Only, those numbers might be wrong.

A paper recently published in Nature Geoscience, authored by Gerald Dickens of Rice University, Richard Zeebe of the University of Hawaii and James Zachos of the University of California - Santa Cruz has found evidence that climatologist models may in fact be wrong. Their work concentrates on a well-known thermal event in Earth's past known as the Palaeocene-Eocene thermal maximum (PETM) and the records it left behind in the form of carbon deposits. Via core samples from all around the world, the PETM is one of the best documented events of its kind.

But what Dickens's team found in those PETM cores doesn't jive with the standard global warming model in use by the Intergovernmental Panel on Climate Change (IPCC). The IPCC model typically uses a 100% increase in atmospheric carbon as the threshold in their models, but when compared to the deposits from the PETM, in which atmospheric carbon levels only rose by about 70%, the current model fails to explain the dramatic temperature increase during that period.

How does the Dickens/Zeebe/Zacho team explain the 7 degrees Celsius jump in just 10,000 years? They can't. But they think their data suggests that there's some unaccounted process missing from the IPCC model. If they are correct, the IPCC models could be off by as much as 100% as far temperature goes when using the PETM event as a reference.

Global warming, whether it exists or not, whether it's man-made or not, will be a hot topic in the next few years, perhaps decades. While not every study done has substantial ground to stand on, there does seem to be much that scientists do not understand about the geological or environmental processes behind it. More data is needed, and perhaps groups like Dickens's will find it.



Comments     Threshold


This article is over a month old, voting and posting comments is disabled

Is it possible....
By Xaser04 on 7/16/2009 11:12:37 AM , Rating: 2
That the additional unknown warming was caused by oooo I don't know, the Sun?!

Of course admiting that the unknown warming was caused by the sun may out a slight spanner in the works of the current IPCC predictions.....

I am starting to get more and more fed up of hearing how the leaders of the developed world are going to combat climate change, seriously the entire premise of trying to combat climate change is an oxymoron in its self. How can we 'combat' something that by its very nature (and description) is changing all the time?




RE: Is it possible....
By phattyboombatty on 7/16/2009 2:23:37 PM , Rating: 2
It's ironic that progressives are the ones pushing so hard to combat climate change. I thought conservatives were the ones who fight so hard to keep things the same. Variety is the spice of life. I welcome climate change.


RE: Is it possible....
By Solandri on 7/17/2009 1:30:12 AM , Rating: 3
Each side has its own agenda. If the figures on global dimming are correct
http://en.wikipedia.org/wiki/Global_dimming
then a viable solution to global warming (assume for the moment that it is happening) is to seed high altitude clouds which reflect sunlight back into space before it has a chance to heat the Earth appreciably. But that doesn't jive with the environmental movement's agenda for eliminating fossil fuel use.

I'm of the opinion that the environmentalists are probably correct on this one. But don't for a minute believe that they're on the side they're on primarily because they're worried about the Earth getting warmer. They see it as a great vehicle to drive the policies they want implemented. Just like many of the deniers are on the side they're on because their current business operations would be greatly upset of it's true. It's all politics.

The scientists who have flip-flopped on the issue (sometimes several times) with each new nugget of data are the ones I actually respect the most. By flipping, they've demonstrated they're not beholden to one side of the issue.


RE: Is it possible....
By AlmostExAMD on 7/20/2009 3:18:57 AM , Rating: 2
The same way we combat new Viruses,Flu's.
Doesn't stop them creating new drugs to combat new strains.
Yes it is changing all the time,But cutting all the trees down aint exactly helping either,They do tend to suck up CO2 from what I remember. lol
Man made global warming or not,Sitting back and doing nothing is a recipe for disaster,Better to tidy up our act now so we don't become to lazy in future(or is it to late).
Bahhh what should I care,I don't have any kids to worry about,Dunno about you lot though! ;)


"When an individual makes a copy of a song for himself, I suppose we can say he stole a song." -- Sony BMG attorney Jennifer Pariser














botimage
Copyright 2014 DailyTech LLC. - RSS Feed | Advertise | About Us | Ethics | FAQ | Terms, Conditions & Privacy Information | Kristopher Kubicki