News: New Study Shows Climate Change Largely Irreversible (green house, organic, greenhouse gases)
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Scientists all know climate change is reversable. We put a man on the moon. We can clone people. We can fly faster than the speed of sound. These and many other things were all thought to be impossible by closed minded people.
" changes in surface temperature, rainfall, and sea level are largely irreversible for more than 1,000 years.... "
That's hardly surprising.
After all, after 40 years of demagoguing and lecturing us, the leftists STILL haven't been able to produce a single study linking man's activities with global warming (or cooling etc.). ***40 YEARS***, and nothing.
So, is it any surprise when someone announces that we won't be able to affect it for the next 1000 years either?
Last edited by Little-Acorn; 01-12-2010 at 10:10 AM..
“It has long been known that some of the carbon dioxide emitted by human activities stays in the atmosphere for thousands of years,” Solomon said. “But the new study advances the understanding of how this affects the climate system.”
The study examines the consequences of allowing CO2 to build up to several different peak levels beyond present-day concentrations of 385 parts per million and then completely halting the emissions after the peak. The authors found that the scientific evidence is strong enough to quantify some irreversible climate impacts, including rainfall changes in certain key regions, and global sea level rise.
If CO2 is allowed to peak at 450-600 parts per million, the results would include persistent decreases in dry-season rainfall that are comparable to the 1930s North American Dust Bowl in zones including southern Europe, northern Africa, southwestern North America, southern Africa and western Australia.
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actually co2 is good
oh no not 385 ppm of co2
guess what
co2 levels were over 700 ppm 20 thousand years ago....so what's the big deal
guess what, by science no less...the ideal co2 ppm for hemp is....700 ppm
As the air's CO2 content rises, most plants exhibit increased rates of net photosynthesis and biomass production. Moreover, on a per-unit-leaf-area basis, plants exposed to elevated CO2 concentrations are likely to lose less water via transpiration, as they tend to display lower stomatal conductances. Hence, the amount of carbon gained per unit of water lost per unit leaf area - or water-use efficiency - should increase dramatically as the air's CO2 content rises. In the study of Serraj et al. (1999), soybeans grown at 700 ppm CO2 displayed 10 to 25% reductions in total water loss while simultaneously exhibiting increases in dry weight of as much as 33%. Thus, elevated CO2 significantly increased the water-use efficiencies of the studied plants.
In summary, it is clear that as the CO2 content of the air continues to rise, nearly all of earth's agricultural species will respond favorably by exhibiting increases in water-use efficiency. It is thus likely that food and fiber production will increase on a worldwide basis, even in areas where productivity is severely restricted due to limited availability of soil moisture. Therefore, one can expect global agricultural productivity to rise in tandem with future increases in the atmosphere's CO2 concentration.
so more co2 is actually GREENER
its not theroy, its scientific fact
science shows that humans use oxygen and expele (exhale) co2
science shows that greenery (plantlife) uses co2 and expeles o2
science shows that co2 levels have been 3 times HIGHER than they are today, in the past (ie the co2 325 of today is is much lower than the 750-800 that co2 levels were 100,000 years ago
science shows us that the earth has warmed AND cooled many times
science shows us that ANTARTICA was once a lush furtile land, not covered in ice
science shows us that greenland was once a green lush furtile land, not covered with ice
science shows us that GLACIERS created many of the geographical features that we look at today (ie Long Island was made by the lower reaching of graciers, the great lakes were created by glaciers, the grand canyon was created by glacial melting)
science shows us that plants would grow much better, and use less water if the co2 was HIGHER
common sense states that as the earths polulation expands, so does the need for more plantlife...so keep our oxygen levels up.......yet the global warming people only want to talk about tailpipe exaust man created co2, and how to tax it.
there are plenty of other benefits to the planet from global warming. Because warming is concentrated at the poles, large sections of the continental landmasses in the Northern Hemisphere that are currently too cold to be used for productive agriculture would become usable. Current agricultural lands would be warmed, but not as seriously impacted as warming closer to the equator is less severe. Also, warming is supposedly more prevalent during the winter months, lessening the length and severity of cold months leading to longer growing and allowing us to spend less of our resources on heating (wood, fossil fuels, electricity). Furthermore, warming would increase air temperature near and water temperature in the oceans, leading to increased evaporation and moisture in the atmosphere. This moisture would then fall as rain on the continents, further increasing the land's agricultural carrying capacity, thus allowing us to grow more food (and lessen the severity of current water shortages).
Since i don't thnik clmate change has nayhting to do with human behvior just as in the past;there really is nothing we can do about it.Its like saying the dinsearos could contro9l extension;but so profit b ysay it can and other feel better because they think they can.
The American Association for the Advancement of Science (AAAS) has reaffirmed the position of its Board of Directors and the leaders of 18 respected organizations, who concluded based on multiple lines of scientific evidence that global climate change caused by human activities is now underway, and it is a growing threat to society.
“The vast preponderance of evidence, based on years of research conducted by a wide array of different investigators at many institutions, clearly indicates that global climate change is real, it is caused largely by human activities, and the need to take action is urgent,” said Alan I. Leshner, chief executive officer of AAAS and executive publisher of the journal Science.
The American Association for the Advancement of Science (AAAS) has reaffirmed the position of its Board of Directors and the leaders of 18 respected organizations, who concluded based on multiple lines of scientific evidence that global climate change caused by human activities is now underway, and it is a growing threat to society.
“The vast preponderance of evidence, based on years of research conducted by a wide array of different investigators at many institutions, clearly indicates that global climate change is real, it is caused largely by human activities, and the need to take action is urgent,” said Alan I. Leshner, chief executive officer of AAAS and executive publisher of the journal Science.
Interesting, the Institute of Physics has some concerns since the emails:
And no, they are not disregarded, debunked, or explained away. In fact, there are some major investigations going on in multiple agencies. It isn't just the CRU that is the issue.
Those administrative claims are wearing thin, the issue isn't going away no matter how much it is waved off.
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