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Politics : Formerly About Advanced Micro Devices -- Ignore unavailable to you. Want to Upgrade?

To: tejek who wrote (752415)	11/12/2013 8:07:42 AM
From: Brumar89	1 Recommendation Recommended By FJB Read Replies (1) \| Respond to of 1577147

Let's correct a few things: Yes, the planet had warmed from the last ice age...... A good thing. Particularly in the last 50 years, the planet started to warm again as gases from fossil fuels coincidentally began to increase in the atmosphere. Not really, it's been warming since the trough of the Little Ice Age. Warming since 1950 isn't any more rapid than that over the previous 150 years. Far from being a death sentence, release of more CO2 is a GOOD thing. We know from fossilized plants found at La Brea that during the last ice age plants were stressed by carbon starvation. Carbon has been being buried by geological processes for many millions of years and the CO2 level in the atmosphere is very low, not far above the level at which plants start dying. Carbon starvation in glacial trees recovered from the La Brea tar pits, southern California Pertenece a: PubMed Central (PMC) PubMed Central (PMC3 - NLM DTD) Descripción: The Rancho La Brea tar pit fossil collection includes Juniperus (C3) wood specimens that 14C date between 7.7 and 55 thousand years (kyr) B.P., providing a constrained record of plant response for southern California during the last glacial period. Atmospheric CO2 concentration ([CO2]) ranged between 180 and 220 ppm during glacial periods, rose to ?280 ppm before the industrial period, and is currently approaching 380 ppmin the modern atmosphere. Here we report on ?13C of Juniperus wood cellulose, and show that glacial and modern trees were operating at similar leaf-intercellular [CO2](ci)/atmospheric [CO2](ca) values. As a result, glacial trees were operating at ci values much closer to the CO2-compensation point for C3 photosynthesis than modern trees, indicating that glacial trees were undergoing carbon starvation. In addition, we modeled relative humidity by using ?18O of cellulose from the same Juniperus specimens and found that glacial humidity was ?10% higher than that in modern times, indicating that differences in vapor-pressure deficits did not impose additional constrictions on ci/ca in the past. By scaling ancient ci values to plant growth by using modern relationships, we found evidence that C3 primary productivity was greatly diminished in southern California during the last glacial period. biblioteca.universia.net The last warming period did not have multi millions of people living in major cities along the coastlines.... would be severely damaged if the oceans rose up 6 meters. Any hypothetical sea level rise, if it happened, would be slow and easy to adapt to. What proposal for solving Global warming do you prefer? Tax the shit out of Republicans. Which tells everyone you're driven by political animus not by any informed concern for the planet. Hell, you don't even want to tax your fellow Detroitocrats.

To: tejek who wrote (752415)	11/12/2013 8:55:39 AM
From: mel221	1 Recommendation Recommended By TideGlider Read Replies (1) \| Respond to of 1577147

>> That actually is incorrect. Yes, the planet had warmed from the last ice age That's why I used the word "Generally". There is a primary trend of warming and a variety of smaller cooling and warming trends. Nothing is a straight line. Nothing is constant. >> Huh? Why is sequestered carbon a death sentence for every living being? Not one of your better mornings is it? Sequestered carbon is in the form of Methyl Hydrides, Coal, Natural gas and OIL. None of these are biologically active. Think it through. If we took 100% of the atmospheric carbon and turned into underground coal, how would photosynthesis work? It wouldn't. I'm sure you can figure out the rest. >> Tax the shit out of Republicans. Actually, that is the only proposed solution. Which is why the smarter people don't take global warming alarmists seriously.