If you read TFA you'd see that the drop in CO2 levels wasn't caused by the plants absorbing it (although they did absorb a bit) but by the weathering the plants caused to the surface which exposed minerals that absorbed the CO2 directly out of the air. That still occurs today but it's very slow on human time scales.
eeerrr, Hello all "Warming deniers". Solar influence alone (even if it's as low as during the Maunder Minimum) is not enough to induce a cooling trend. At most they will delay the warming that is coming by 5 or 10 years. There's a paper about that very subject. (Feulner & Rahmstorf, 2010)
I read somewhere that there's enough energy inside of the Earth that plate tectonics won't stop before the Sun expands and engulfs the Earth around 4.5 billion years from now.
Why do the ice cores reveal co2 concentrations at the height of the last ice age at 20 times today's readings?
Where did that come from? Got a reference? From what I know CO2 concentrations were around 190 ppm at the height of the glaciations and today they're around 390 ppm, over twice as high.
The flooding of the atmosphere with the caustic, corrosive gas occurred about 2.4 billion years ago, long before land plants appeared around 500 million years ago.
Several economic studies I've seen say the "dramatic economic steps" we need to take to reduce CO2 emissions would cost 2-3% of GDP to accomplish. It will take 30-40 years to reach the ultimate goal.
Gary Powers survived his U-2 being shot down. He died in the crash of a helicopter he was piloting in 1977. However Major Rudolph Anderson died when his U-2 was shot down over Cuba in October of 1962. How many U-2's could you build for the cost of one SR-71? Lockheed's contract for the first 20 U-2's was $22 million dollars.
Flying brick is not how I would describe the U-2. It is built like a glider and floats so well it is difficult to land. On the other hand it's the SR-71 that would drop like a brick if you lost the engines. And I think you can run several U-2 missions for the cost of one SR-71 mission.
Both you and tgd are right. I didn't address the potential for rapid ice sheet disintegration. The West Antarctic Ice Sheet is particularly vulnerable to that as it is grounded as much as 2,500 feet below sea level. I also didn't address thermal expansion of the ocean as it warms up. About half of the 20th century sea level rise was from thermal expansion.
If all of the ice on Greenland and Antarctica (and other lesser ice caps) were to melt it would cause a bit over 200 feet (~65 meters) of sea level rise. However, it would take thousands of years for all of that ice to melt The ice on Antarctica averages ~7,000 feet in depth and it's up to ~12,000 feet in places so it won't melt that fast at any temperature that still supports humans living on the Earth. Current estimates for sea level rise by 2100 are in the 3-6 foot range. 20 feet above the current level isn't inconceivable in 2200.
Regarding what it would take to melt all of it, a paper out recently said that the big ice sheets started to form when CO2 levels dropped below 700 ppmv maybe 30 million years ago. We are currently at ~390 ppmv, up from 280 ppmv in 1830 and ~320 in 1960. At the current rate we would hit 700 ppmv in less than 200 years.
Except Gore never lied about inventing the internet. Some weenies on the other side just took his words and twisted them so it sounds like he did. From the Wikipedia article on Al Gore and information technology:
Of Gore's involvement in the then-developing Internet while in Congress, Internet pioneers Vint Cerf and Bob Kahn have also noted that,
As far back as the 1970s Congressman Gore promoted the idea of high-speed telecommunications as an engine for both economic growth and the improvement of our educational system. He was the first elected official to grasp the potential of computer communications to have a broader impact than just improving the conduct of science and scholarship [...] the Internet, as we know it today, was not deployed until 1983. When the Internet was still in the early stages of its deployment, Congressman Gore provided intellectual leadership by helping create the vision of the potential benefits of high speed computing and communication. As an example, he sponsored hearings on how advanced technologies might be put to use in areas like coordinating the response of government agencies to natural disasters and other crises.
Think plate tectonics. The land surface of the Earth does not stay in one place. Heck, there are some areas on the California coast that were once attached to Antarctica.
Right. The Greenland glaciers melting may be bad. Now, would you so kindly tell me how a fresh water plume will affect glaciers ON LAND?
I'm not saying the fresh water plume will affect the glacial ice but if it does affect the weather over the Arctic Ocean then it must necessarily have an effect on the weather over the ice caps on Greenland and other smaller islands just because of proximity. On top of that loss of sea ice can affect glacial ice where the two meet. Less sea ice means less back pressure on the tongues of glacial ice flowing into the sea so they speed up and lose ice faster than they otherwise might.
Why would you think that melting ice caps would cause ocean currents to cease? I may cause them to change but temperature and density differentials are not the only cause of ocean currents. Prevailing winds and Coriolis forces also have their effects.
Oxygen is abundant on the moon in the rocks. You can make lots of water just by shipping in hydrogen and combining it with local oxygen. You could even make some power in the process.
Not only that but after hearing the original arguments on the narrow case brought by the Citizens United organization they told the lawyers to go back and bring arguments for a broader case. The SCOTUS on their own broadened the case beyond its original scope so they could make a broader ruling. Talk about activist judges.
Many governments around the world are trying to control the internet, to stifle the democratization of information and access. In the end they will lose.
Slashdot Mirror
Kind of like Viagra for the globe.
If you read TFA you'd see that the drop in CO2 levels wasn't caused by the plants absorbing it (although they did absorb a bit) but by the weathering the plants caused to the surface which exposed minerals that absorbed the CO2 directly out of the air. That still occurs today but it's very slow on human time scales.
eeerrr, Hello all "Warming deniers". Solar influence alone (even if it's as low as during the Maunder Minimum) is not enough to induce a cooling trend. At most they will delay the warming that is coming by 5 or 10 years. There's a paper about that very subject. (Feulner & Rahmstorf, 2010)
I read somewhere that there's enough energy inside of the Earth that plate tectonics won't stop before the Sun expands and engulfs the Earth around 4.5 billion years from now.
Why do the ice cores reveal co2 concentrations at the height of the last ice age at 20 times today's readings?
Where did that come from? Got a reference? From what I know CO2 concentrations were around 190 ppm at the height of the glaciations and today they're around 390 ppm, over twice as high.
The flooding of the atmosphere with the caustic, corrosive gas occurred about 2.4 billion years ago, long before land plants appeared around 500 million years ago.
Several economic studies I've seen say the "dramatic economic steps" we need to take to reduce CO2 emissions would cost 2-3% of GDP to accomplish. It will take 30-40 years to reach the ultimate goal.
Gary Powers survived his U-2 being shot down. He died in the crash of a helicopter he was piloting in 1977. However Major Rudolph Anderson died when his U-2 was shot down over Cuba in October of 1962. How many U-2's could you build for the cost of one SR-71? Lockheed's contract for the first 20 U-2's was $22 million dollars.
Flying brick is not how I would describe the U-2. It is built like a glider and floats so well it is difficult to land. On the other hand it's the SR-71 that would drop like a brick if you lost the engines. And I think you can run several U-2 missions for the cost of one SR-71 mission.
Yeah, I know. Don't feed the trolls.
Both you and tgd are right. I didn't address the potential for rapid ice sheet disintegration. The West Antarctic Ice Sheet is particularly vulnerable to that as it is grounded as much as 2,500 feet below sea level. I also didn't address thermal expansion of the ocean as it warms up. About half of the 20th century sea level rise was from thermal expansion.
Well, the word "Transportation" does include railroads last time I checked.
Some people have "Gore derangement syndrome."
Perhaps they were caught in a big avalanche off the face of of a melting ice cap essentially killing them instantly.
Call me when the ice on Antarctica will start melting at an accelerated rate.
Ring! Ring! It already is melting and the rate is accelerating as measured by the GRACE satellites. But it still amounts to less than a millimeter per year of SLR for now.
Wind also pushes the ice itself which has an effect on the water underneath it. The thinner the ice the easier the wind can push it.
If all of the ice on Greenland and Antarctica (and other lesser ice caps) were to melt it would cause a bit over 200 feet (~65 meters) of sea level rise. However, it would take thousands of years for all of that ice to melt The ice on Antarctica averages ~7,000 feet in depth and it's up to ~12,000 feet in places so it won't melt that fast at any temperature that still supports humans living on the Earth. Current estimates for sea level rise by 2100 are in the 3-6 foot range. 20 feet above the current level isn't inconceivable in 2200.
Regarding what it would take to melt all of it, a paper out recently said that the big ice sheets started to form when CO2 levels dropped below 700 ppmv maybe 30 million years ago. We are currently at ~390 ppmv, up from 280 ppmv in 1830 and ~320 in 1960. At the current rate we would hit 700 ppmv in less than 200 years.
Except Gore never lied about inventing the internet. Some weenies on the other side just took his words and twisted them so it sounds like he did. From the Wikipedia article on Al Gore and information technology:
Of Gore's involvement in the then-developing Internet while in Congress, Internet pioneers Vint Cerf and Bob Kahn have also noted that,
As far back as the 1970s Congressman Gore promoted the idea of high-speed telecommunications as an engine for both economic growth and the improvement of our educational system. He was the first elected official to grasp the potential of computer communications to have a broader impact than just improving the conduct of science and scholarship [...] the Internet, as we know it today, was not deployed until 1983. When the Internet was still in the early stages of its deployment, Congressman Gore provided intellectual leadership by helping create the vision of the potential benefits of high speed computing and communication. As an example, he sponsored hearings on how advanced technologies might be put to use in areas like coordinating the response of government agencies to natural disasters and other crises.
Think plate tectonics. The land surface of the Earth does not stay in one place. Heck, there are some areas on the California coast that were once attached to Antarctica.
Do you have any scientific evidence that the globe was warmer during the MWP than it is now? From all I know it likely wasn't.
Right. The Greenland glaciers melting may be bad. Now, would you so kindly tell me how a fresh water plume will affect glaciers ON LAND?
I'm not saying the fresh water plume will affect the glacial ice but if it does affect the weather over the Arctic Ocean then it must necessarily have an effect on the weather over the ice caps on Greenland and other smaller islands just because of proximity. On top of that loss of sea ice can affect glacial ice where the two meet. Less sea ice means less back pressure on the tongues of glacial ice flowing into the sea so they speed up and lose ice faster than they otherwise might.
Why would you think that melting ice caps would cause ocean currents to cease? I may cause them to change but temperature and density differentials are not the only cause of ocean currents. Prevailing winds and Coriolis forces also have their effects.
Oxygen is abundant on the moon in the rocks. You can make lots of water just by shipping in hydrogen and combining it with local oxygen. You could even make some power in the process.
Not only that but after hearing the original arguments on the narrow case brought by the Citizens United organization they told the lawyers to go back and bring arguments for a broader case. The SCOTUS on their own broadened the case beyond its original scope so they could make a broader ruling. Talk about activist judges.
Many governments around the world are trying to control the internet, to stifle the democratization of information and access. In the end they will lose.
A nuke just turns a 50 caliber bullet into a 10 gauge shotgun load.