Schmed:
Yes, the Cretaceous Period was a long time ago. But is the claim being made that all was so different that no valid comparison can be made? If so, I find that claim laughable. As to why I find the same laughable [see:
http://www.sciencedaily.com/releases/2003/...31104063957.htm ]:
"Decomposition of organisms in the deep ocean could have caused an overabundance of carbon dioxide, which is lethal to many oceanic organisms and land-based animals.
'However, we find mass extinction on land to be an unlikely consequence of carbon dioxide levels of only seven times the preindustrial level," Kump told attendees today (Nov. 3) at the annual meeting of the Geological Society of America in Seattle. "Plants, in general, love carbon dioxide, so it is difficult to think of carbon dioxide as a good kill mechanism.'"And not only did [do] plants love CO2, but so did the dinosaurs that ate the plants, and so did the dinosaurs that ate the dinosuars that ate the plants [
http://www.ncsu.edu/news/press_releases/04_01/026.htm ]:
"Decherd studies the ecology of the Cretaceous period, some 160 million years ago, when Earth’s atmosphere contained more oxygen and more carbon dioxide and was, in her words, “a hothouse.” She believes, and is working to demonstrate, that this richer atmosphere helped plants grow bigger and faster. With lots of food, herbivorous dinosaurs thrived -- and became lumbering prey for their carnivorous cousins.
Both plant-eaters and meat-eaters grew fearsome, in effect, because food was plentiful.
***
'Research has shown that elevated carbon dioxide levels result in higher productivity, faster photosynthetic and growth rates, and greater rates of carbohydrate synthesis,' she says. 'My work involves measuring how modern ginko trees react to Cretaceous-like atmospheres, and how the higher levels of oxygen and carbon dioxide affect the leaves’ nutritive value and digestibility. We’re also comparing these experimental ginko leaves with fossilized ginko leaves from the Cretaceous period to help verify our work.'
***
Decherd hopes her research can resolve a scientific conundrum: How could the limited North American land area of the Cretaceous period – when water in the east and mountains in the west left only a relatively narrow band of arable land – grow enough plants to support the numerous, diverse and very hungry herbivores of the time?
'I hope to demonstrate that the enriched atmosphere of that time had a profound impact on plant productivity,' Decherd says. 'Others have shown that oxygen was 50 percent higher and carbon dioxide was 500 percent higher in the Cretaceous atmosphere. Both of these gases affect the growth of plants, which are very sensitive to changes in oxygen and carbon dioxide levels.'"As to relevance, well, she apparently believes what you do not:
"Does that explain the massive size of the dinosaurs? It might, but Decherd prefers to focus on the plant-growth aspects of her research. 'The larger issues my work could help illumine aren’t the dinosaurs,' she says, 'but rather the ecology of the Cretaceous period, the addition of our data to environmental and climatic models, and perhaps some insight into current concerns about greenhouse gases and global warming.'"As I've said prior, the added CO2 should be a boon to plant life, but more on that in a bit.
But first, for more on relevancy [
http://blog.sciam.com/index.php?title=coul...p;tb=1&pb=1 ]:
"Another recent study attempts to test climate models by looking back 84 million to 100 million years ago, during the Cretaceous period. The lead author, Karen Bice of the Woods Hole Oceanographic Institution, presented the results at the American Association for the Advancement of Science meeting in February (as discussed in The Economist and Science). The team published its paper last week, and it is worth looking at for an appreciation of the uncertainties involved in paleoclimate data and how scientists wrestle with them."And, Schmed, why leave out the long term history? The long term history is that our atmosphere once was 50X more dense than now. The earth has been forever cooling owing to CO2 sequestration. The trend was leading to a more or less permanent "ice house" condition with some rather short interglacial periods. As I remarked prior, compared to living in an ice age world, a Cretaceous-like world would be the equivalent of a Sunday picnic. Millions upon millions upon millions of humans will die if we have another ice age, since, among other items, the North American breadbasket of the world would be no more. So if the choice is, we move back from the coast a bit, and in exchange we can feed ever more humans owing to increased plant growth and longer growing seasons, well, let me just say that the call is an easy one to make, i.e., life over all else. It strikes me as strange that those who claim to care about life could be against that, though my suspicion is that some really don't care about life, since I've read more than I'd care to from these same people about how the world is overpopulated. Presumably, such persons envision our third world brothers and sisters being the ones to do the dying off (as it were). I find that attitude both racist and heartless and otherwise not something that I can support in any way, shape, or form. Actually, I lied, increased water from ice melts will be compensated for, as in Greenland, as the studies show, by increased snowfall in the interior. So while we might have to move back a hundred meters or so, the move will not be catastrophic.
Now for more relevancy [
http://www-news.uchicago.edu/releases/96/961028.archer.shtml ]:
"The implications of rising carbon dioxide levels are not fully understood. “There have been times in the geologic past when the earth has had much higher concentrations of carbon dioxide in the atmosphere and life has flourished–for example, during the Cretaceous period when dinosaurs were alive,” Archer said. “It’s not having a warmer climate that’s a problem as much as the transition. Human communities have developed in areas that are suitable for agriculture, for example. If an area that has in the past gotten a lot of rain suddenly begins to experience prolonged and unremitting drought, it will be devastating to society.”"
So might I suggest that we all start moving inland now? And why he is speaking of drought when the general rule of science is that the hotter it is, the wetter it is? Never mind, since for more on relevancy [
http://www.igsb.uiowa.edu/inforsch/greenhse/grnhouse.htm ]:
"The mid-Cretaceous Period (about 100 million years ago--during the "Age of Dinosaurs"), however, does represent a recent geologic analog in earth history that can be used to predict future greenhouse conditions.
The "Cretaceous Greenhouse World" refers to an episode of earth history that lasted from about 110 to 90 million years ago. During this time, submarine volcanic CO2 emissions were released into the atmosphere at rates high enough to cause atmospheric CO2 concentrations in excess of 1,000 ppm. This CO2 buildup resulted from rapid sea-floor spreading related to the breakup and drifting apart of the Earth’s continents. The buildup lasted for about 10 million years, and the ensuing period of peak warming coincided with an explosive growth in the genetic diversity of flowering plants, social insects, birds, and mammals--organisms that dominate modern terrestrial ecosystems. The consequences of a similar greenhouse buildup occurring over the course of only a few hundred years, however, are likely to be highly disruptive to natural ecosystems. Plants and animals live in zones of predictable temperature and precipitation. If this climate is altered too quickly, the species may not have sufficient time to migrate and adapt." And on another point, the greenhouse effect of CO2 is not a linear thing. Instead, the more CO2 we add, the less the effect of each addition [call it a case of ever diminishing returns]. Most people don't know that and assume the opposite, i.e., the linear.
Now for a final word on relevancy:
http://www.whoi.edu/institutes/occi/viewAr...e.do?id=13366#5So, the Cretaceous apparently is relevant.
Sorry, one more, the reason why I am a skeptic:
"How confident are you of the accuracy of the models?
PETER WINSOR: There are very large uncertainties in these model projections. They reproduce a lot of climate responses well, but they lack other important key processes. For example, they’re not very good with clouds and water vapor." They’re doing a so-so job with reproducing the present climate, so we—at least myself—have a hard time putting too much trust in what they show 100 years from now. But it does give you a hint of what the climate response might be in the future."As I've mentioned before, without modeling clouds, we don't have an accurate picture, and as we all know, water vapor is a far more potent greenhouse gas than is CO2.
And I hope that this is truly accounted for in the models:
"There are also compounds emitted to the atmosphere that can lead to net cooling. When we burn fossil fuels, we actually release sulfates that produce small sulfate particles or aerosols. You can think of these as very bright little particles in the atmosphere that actually reflect a lot of sunlight back to space. One of the areas of considerable scientific debate concerns the balance between warming due to CO2, and cooling due to sulfates. The exact balance has not been that well quantified, and that’s one of the sensitivities of the climate models that we don’t know that well."TedN5:
I trust that you understand that even without Kyoto, we have reduced our CO2 emissions as measured in relation to GDP. And please see my remarks above about the models and how much we don't know. And re pollution controls, careful what you wish for [going back to my remark that the chic thing for a while was planting trees though it appears that trees help increase temp while grasses help reduce temp]:
"This may be significant because as a lot of countries start to reduce their sulfate emissions, which is associated with air pollution and acid rain, we may see sulfate aerosol levels in the atmosphere going down over time. The carbon dioxide emissions will go up, and we suddenly may see a dramatic jump in warming that’s been masked by this release of sulfate aerosols."And please note the diagram on that same site [you too Schmed] re just how much effect the rise in sea level will have on our coasts. And then please note the disclaimer:
"Of course, we don't know if 6 meters will occur in 100 or 1000 years. That we are headed for this scenario is likely given past interglacial sea levels and the added perturbation due to man's influence."And then please note that Ms. Bice has apparently not read the studies on how trees increase temp, and that we should be planting grasses instead:
"And at the same time, we also know that, through deforestation, we’re taking way one of the short-term sinks for CO2, which is forest growth."And since the one fellow spoke of a Greenland without ice:
"Q. How will global warming affect rainfall patterns?
A. TERRY JOYCE: The conventional idea is that if you warm up the atmosphere, it will hold more water vapor and increase the potential for more rainfall. That’s more or less true, but projections indicate that this is not going to be uniform everywhere."Yeah, except that it will be snow in Greenland and it will accumulate in the interior as the studies I cited previously have reported. And pity that some can't seem to make the connection, since after a Greenland without ice, we have:
"We’re already seeing examples from Ruth Curry’s research that we’re getting more evaporation—and less rainfall—in subtropical areas. We’re getting more water at high latitudes, falling as rain and snow."quarkhead:
The problem you have is that absent any catastrophic warming, CO2 is simply not a pollutant and need not be treated as such.
Amlord is otherwise correct, since the recommended or suggested fix is going to cost us big time. You can find an estimate of the continuing running cost here:
http://www.junkscience.com/MSU_Temps/Kyoto_Count_Up.htmAnd re the agenda, why not? Do you care if the price of oil goes through the roof if you own a couple hundred thousand shares of Shell Oil? Or if you're the CEO of Shell Oil? Or in this context, fine, there will be a cost, but you'll be handsomely paid to deal with the cause of that cost, so what do you care?
Oh, and for more junk science, recall DDT. Not a danger to us. But here's the cost, though the numbers may be a bit off, since more and more nations in Africa are using DDT, and the rest of the world be damned:
http://www.junkscience.com/malaria_clock.htmIn any event, the enviroNazis have already killed more than I care to contemplate with their junk science, and not that you care, but so I'm not in any rush to jump on this latest train of theirs.