- Dec 17, 2010
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I am not going to play your silly games.
I have already demonstrated that the historical data, written in the ice cores, plainly shows that CO2 concentration is an effect of global warming, not a cause. And you have already stated that climatologists know this.
Yet they (and you) keep harping on the lie that increased CO2 in the atmosphere will cause global warming.
QED
Of course, as one totally ignorant of science, you probably do not know that this is a Greek abbreviation for, "which was to be demonstrated."
Enjoy your cool-aid, since you love it.
You couldn't even tell me what the peer-reviewed science says causes an ice age? You don't know what you're talking about!
enjoy
****
Denialist's love to attack Al Gore for many reasons, whether his jet-setting lifestyle or energy intense mansions, or for his movie. His presentation of the Ice Ages in 'An Inconvenient Truth' gets a lot of attention. Al Gore *seemed* to suggest that climate science was based on the idea that changes in CO2 caused the Ice Ages. Rises in CO2 melted the ice, and drops in CO2 caused the Ice Age to creep back. But Denialists correctly jump on this, pointing out that temperature changed first and *then* 700 or 800 years the CO2 changes followed. Something changed the temperature FIRST, and only AFTER many centuries did the CO2 eventually follow. The whole of climate science was undermined! This argument featured prominently in Martin Durkin's 'Great Global Warming Swindle', and originally had me questioning climate science.
Except it's a bunch of clever half-truth's covering a lie of omission.
1. Climate scientists have always known this! Al Gore over-simplified a rather complex scientific story, but any good climate journal on the subject will admit that the ice age story begins with long wobbles in the Earth's orbit and tilt that cause changes in incoming sunlight and where that sunlight hits. The temperature changes first because of changes in how the Earth receives sunlight. (These wobbles are called Milankovitch cycles and you can read more about them at wikipedia:
Milankovitch cycles - Wikipedia, the free encyclopedia
or watch fantastic animations of them at 'Climate Crock of the Week'.
The "Temp Leads Carbon" Crock: Updated - YouTube
2. Climate science was *never* based on *just* that graph, but on the demonstrable physics of CO2 as a heat-trapper. Physicists measure CO2's heat trapping properties with a Fourier device. It's the same result, every time. It's an established fact, like the boiling point of water or melting point of various metals. It's old science, something you look up in a book rather than bothering to test again and again, reinventing the wheel. The rest is maths. Calculate how much CO2 was in the air before the Industrial Revolution, and then measure how much extra we've dumped into the atmosphere now, and the difference shows how much extra heat is trapped. The next bit is the tricky part of measuring where that heat *goes* and how it interacts with other systems on the earth (but that's another story).
3. But there's a problem with Milankovitch cycles. The increased or reduced sunlight is not enough to cause the *immense* changes in temperature that we observe! It turns out that the Milankovitch wobble's dimmer sunlight 'triggers' the ice age, but as ice grows it traps CO2 in under frozen permafrost, locking it out of the normal CO2 cycles. As the temperatures drop, more CO2 is trapped, more ice acts like a mirror bouncing sunlight back into space before it can be absorbed and turned into heat, and the cycle continues. The final result? Roughly 40% of the change actually comes from CO2 being trapped (or released) by changes in the ice. (See the 2nd paragraph, column 2 of page 144).
http://pubs.giss.nasa.gov/docs/1990/1990_Lorius_etal.pdf
In other words, if the 'wobbles' are the 'trigger', then CO2 is the gunpowder that propels this 'climate shot' along.
From this more detailed perspective Al Gore was almost right! The CO2 *did* account for the *eventual* extremes of temperature we see at the depths of a bad Ice Age, and the release of the CO2 accounts for the much warmer temperatures between Ice Ages. Not only that, but it adds extra urgency to our situation today. Milankovitch cycles will not cause the next ice age for tens of thousands of years. We're the 'trigger' messing with the carbon cycle today. We're the ones adding 9 billion tons of carbon to the carbon cycle each year as we burn coal and oil and gas. We're the ones adding 9 billion tons of carbon to the carbon cycle each year which is acidifying the oceans and undermining the base of the food web across our entire ocean ecosystems. We're the ones adding 9 billion tons of carbon to the carbon cycle each year as we burn coal and oil and gas which poisons us, killing an estimated 7 million people a year.
25 March 2014 | Geneva - In new estimates released today, WHO reports that in 2012 around 7 million people died - one in eight of total global deaths – as a result of air pollution exposure. This finding more than doubles previous estimates and confirms that air pollution is now the world’s largest single environmental health risk. Reducing air pollution could save millions of lives.
http://www.who.int/mediacentre/news/releases/2014/air-pollution/en/
And worst of all, we're the ones adding 9 billion tons of carbon to the carbon cycle each year as we burn coal and oil and gas, which will artificially push our temperatures higher than interglacial warming events for the last 55 million years, and shove our climate into a situation where the Siberian peat bogs start to thaw, releasing over twice as much carbon than there is burnable fossil fuels! Inch by inch we are pushing our civilisation towards a climate cliff, and soon gravity will take over. We rely on the 'warm' climate in which this civilisation developed. It's not 'cold' as in an 'ice age', or 'hot' as in the dinosaur era. It's just right: a Goldilocks climate. We're messing with that, and the results will be catastrophic.
But a Denialist will never tell you all this. They just ask "How can CO2 affect climate when it RESPONDS to changes in temperature!" They leave out half the story. As always.
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