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| Australia Under Fire Worst in Decades.. |
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| Zero999:
--- Quote from: StillTrying on January 07, 2020, 10:31:27 pm --- --- Quote from: Zero999 on January 07, 2020, 10:08:32 pm ---The weight of modern scientific evidence suggests that doubling CO2 levels does cause an increase in global temperatures and there are positive feedback effects, such as snow melting, leaving bare dark rocks and ocean which soak up more heat from the sun and ice which contains dissolved greenhouse gasses to melt. --- End quote --- If you go back far enough C02 was 1500ppm. --- End quote --- That was before humans existed of course! --- Quote --- --- Quote ---What other things, which are currently backed up by modern science, do you think are BS? --- End quote --- Well AGW isn't proved (to my satisfaction :o), only a few decades ago we were all preparing for the coming ice age, how did they manage to miss the previous 150 years of global warming. --- End quote --- Why is it the only thing which hasn't been proven to your satisfaction? There are plenty of people who will lose a lot of money if we move away from fossil fuels and those are who are responsible for some very effective propaganda. They were partly right about global dimming, cooling the earth's climate. It's just they missed the CO2's warming effect. It's possible that cleaning things up i.e. filtering out particulate pollution will increase global temperatures further, by a reduction in global dimming. https://en.wikipedia.org/wiki/Global_dimming |
| Gyro:
--- Quote from: coppice on January 07, 2020, 10:32:32 pm --- --- Quote from: thm_w on January 07, 2020, 10:25:34 pm ---Similar has been shown with CO2, once you go over about 1,500 ppm or so, you start getting "dumber" and reaction times drop off. --- End quote --- More specifically, CO2 is a powerful narcotic. If people are trapped in an airtight place most dramas depict them desperately gasping for breath as the oxygen runs out. In reality you'd probably be in a horrible state of panic for a while, but as the CO2 rises you'll fall asleep, and eventually die in your sleep. --- End quote --- That's one of the unfortunate 'bugs' in human evolution. Humans have no way of detecting low oxygen - it's build up of CO2 that causes the discomfort and gasping. Put a human (and probably most other animals) in a flushed Nitrogen atmosphere or use CO2 scrubbers and they will lose consciousness in perfect comfort (or even a state of euphoria). Hypoxia low oxygen is a serious danger in many situations, from military pilots and astronauts, to people handling liquid nitrogen in poorly ventilated labs. A supreme creator would have remembered to include an O2 sensor! If we'd been alive when CO2 was anywhere near 1500ppm we would have been extremely unhappy campers, regardless of available O2 levels. At some point in the future, someone's going to get the last opportunity to gasp 'I told you so!'. ;) P.S. Incidentally, pure Nitrogen was suggested as an alternative for use in the death penalty in the US (there was a BBC documentary, around the start of the problem with lethal drug supply). Apparently it wasn't considered appropriate as there was no suffering involved. |
| dietert1:
These huge wildfires are one of the positive feedback effects. They generate a lot of additional CO2 without serving for anything useful. I read that the CO2 total emission of Australia will be about 50 % higher for 2019. As far as i know certain types of dust (which by this time arrived above South America) cause a strong greenhouse effect, too. Regards, Dieter |
| coppice:
--- Quote from: dietert1 on January 07, 2020, 11:04:48 pm ---These huge wildfires are one of the positive feedback effects. They generate a lot of additional CO2 without serving for anything useful. I read that the CO2 total emission of Australia will be about 50 % higher for 2019. --- End quote --- Er, no. The CO2 emissions will be greater for 2019, but in subsequent years similar plants will regrow and take back the CO2. This is not like slash and burn in many parts of the world, where the goal is to clear the forest once and for all, and replace it with small agricultural plants that soak up far less CO2 than the burned trees emitted. |
| dietert1:
We may hope so, but who knows. Without rain, the recovery may be slow and during that time there will be a positive feedback effect. Regards, Dieter |
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