Scripps study: 50 million years ago, ...

Scripps study: 50 million years ago, a warming planet

There are 14 comments on the The Orange County Register story from Mar 17, 2011, titled Scripps study: 50 million years ago, a warming planet. In it, The Orange County Register reports that:

Life in the Eocene period; Scripps scientists found evidence of intense and repeated periods of warming that affected animal life and the environment.

Join the discussion below, or Read more at The Orange County Register.

LessHypeMoreFact

Nepean, Canada

#1 Mar 17, 2011
One thing to note. These periods of 'global warming' were from exactly the same proximate cause ( releases of CO2 and other GHGs to the atmosphere) as what we are doing today by fossil fuel combustion. The periods of 'natural GW' merely give us a measure of how much warming we can expect for similar levels of GHGs ( which fits pretty well with the IPCC estimates). Of course, peering this far back in time leaves some room for error.

“Denying those who deny nature”

Since: Jun 07

Norfolk va

#3 Mar 19, 2011
In other words it is happening exactly the same way now that it happened in the past More proof that warming is natural and has little to do with man.

Since: Apr 08

"the green troll"

#4 Mar 20, 2011
tina anne wrote:
In other words it is happening exactly the same way now that it happened in the past More proof that warming is natural and has little to do with man.
Yes and no. CO2 seems to have been the cause of the ancient warm period, but the report authors are very clear that the modern CO2 is not coming from the same source.

The report is strong evidence of the warming effect of CO2, and that adding CO2 to the atmosphere will cause serious warming.
The likely cause of the warming cycles were periodic bursts of carbon dioxide, a greenhouse gas, that had been buried beneath the ocean, Norris said. They were revealed by gray sediment bands containing clay, the remnants of shells of microscopic organisms dissolved during the carbon dioxide bursts.

Thatís different from todayís warming episode, he said. Strong evidence points to human emissions of greenhouse gases from fossil fuel burning, agriculture and cement production as the main cause of the present spike.

“Denying those who deny nature”

Since: Jun 07

Norfolk va

#5 Mar 20, 2011
Fair Game wrote:
<quoted text>
Yes and no. CO2 seems to have been the cause of the ancient warm period, but the report authors are very clear that the modern CO2 is not coming from the same source.
The report is strong evidence of the warming effect of CO2, and that adding CO2 to the atmosphere will cause serious warming.
<quoted text>
In others words even though the last several times was all natural that this time has to be all man made. Why, because it has to be man despite the fact that nature is't on hold.

The fact is that the belief that man has yet to be proven. Every time some one puts out a study like this it turns out that the part about it being man made never stands up to examination.

Since: Apr 08

"the green troll"

#6 Mar 21, 2011
tina anne wrote:
<quoted text>
In others words even though the last several times was all natural that this time has to be all man made.
Yes, because the source that produced the carbon dioxide before hasn't produced the present rise in CO2.

“Denying those who deny nature”

Since: Jun 07

Norfolk va

#7 Mar 21, 2011
Fair Game wrote:
<quoted text>
Yes, because the source that produced the carbon dioxide before hasn't produced the present rise in CO2.
So, explain why something that has functioned fine in the past cannot function anymore. So far the only reason I see is pure ego.

Since: Apr 08

"the green troll"

#8 Mar 21, 2011
tina anne wrote:
<quoted text>
So, explain why something that has functioned fine in the past cannot function anymore. So far the only reason I see is pure ego.
I think the scientists who wrote the report are trying to explain.
The likely cause of the warming cycles were periodic bursts of carbon dioxide, a greenhouse gas, that had been buried beneath the ocean, Norris said. They were revealed by gray sediment bands containing clay, the remnants of shells of microscopic organisms dissolved during the carbon dioxide bursts.
Nothing like that is happening in the present.

“Denying those who deny nature”

Since: Jun 07

Norfolk va

#9 Mar 21, 2011
Fair Game wrote:
<quoted text>
I think the scientists who wrote the report are trying to explain.
<quoted text>
Nothing like that is happening in the present.
How gan they be so sure. The simple fact is that they just discovered it happen in the past. That has been the entire point, That they are still discovering how much they don't know about climate change to make the claim that it is the result of humans. That while co2 levels increased via natural reasons in the past and why it cannot be so now. Right now your to busy reaching to see all the qualiiers.
Northie

Spokane, WA

#10 Mar 21, 2011
Tina, two factors, and both have to do with India:

1) 50-60 million years ago the Deccan Traps flood basalts poured out over a big slice of India, pouring forth CO2 for millions of years as well. However, it now appears that the CO2 output wasn't the ultimate culprit so much as the frozen methane that it unleashed. You know, like the vast frozen methane clathrates lying around on the continental shelves right now...which are beginning to melt once again.

2) 55 million years ago the Indian subcontinent hit Asia, and the Himalayas began to rise, exposing much more rock to weathering, which sequesters carbon. The result ever since has been a gradually cooling climate.

“Denying those who deny nature”

Since: Jun 07

Norfolk va

#11 Mar 21, 2011
Northie wrote:
Tina, two factors, and both have to do with India:
1) 50-60 million years ago the Deccan Traps flood basalts poured out over a big slice of India, pouring forth CO2 for millions of years as well. However, it now appears that the CO2 output wasn't the ultimate culprit so much as the frozen methane that it unleashed. You know, like the vast frozen methane clathrates lying around on the continental shelves right now...which are beginning to melt once again.
2) 55 million years ago the Indian subcontinent hit Asia, and the Himalayas began to rise, exposing much more rock to weathering, which sequesters carbon. The result ever since has been a gradually cooling climate.
Except the first point is that the earth is warming not cooling for the past ten thousand years. Another point is the deposits are methane hydrates not co2. Which are less of a problem than in the past.

Also consider the size of India compared to the oceans. The math dosn't work there either.

Since: Apr 08

"the green troll"

#12 Mar 21, 2011
tina anne wrote:
<quoted text>
How gan they be so sure.
Because they can observe that the same thing is not happening in the present.

“Happy, warm and comfortable”

Since: Oct 10

Mountain retreat, SE Spain

#13 Mar 22, 2011
Northie wrote:
The result ever since has been a gradually cooling climate.
So why are you worried about GW?
Northie

Spokane, WA

#14 Mar 22, 2011
tina anne wrote:
<quoted text>
Except the first point is that the earth is warming not cooling for the past ten thousand years. Another point is the deposits are methane hydrates not co2. Which are less of a problem than in the past.
Also consider the size of India compared to the oceans. The math dosn't work there either.
Could you be more random?

“Denying those who deny nature”

Since: Jun 07

Norfolk va

#15 Mar 22, 2011
Northie wrote:
<quoted text>
Could you be more random?
You mean more like you?

The fact is that the earth was just coming out of an ice age ten thousand years ago. Places like where you live were still buried under ice.

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