http://www.acceleratingfuture.com/michael/blog/images/co2-levels-over-time.jpg
I read this question ysterday. I knew that the warmists would be piling in with the "Faint Sun Paradox" so I left it.
Is it just me or do warmists seem to assume that the sun can have a cooling effect on the climate but cannot have a warming effect?
The IPCC in AR5 did the same with the current "pause". Whatever euphemism they used for the pause could be contributed to by the downturn in the sun's activity, they said, but there is no mention of the possibility that any increase might have caused some warming.
We are also given the view here that, and I quote: "The sun doesn't have any more impact on GW that (sic) cow farts (another piece of denier bullsh*t)"
Because, as I've said many times, CO2 is not the *only* influence on climate.
That long ago, there was, as far as I'm aware, rather less energy coming from the sun. The continents were in very different places--at that time, the supercontinent Gonwana was more or less where Antarctica is now (only, well, larger). The general atmospheric composition was different, in ways that may or may not have affected climate. And so on.
If I'm understanding correctly, the ice age in the Ordovician (the Andean-Saharan glaciation) was an ice age only in the same sense that we have today--ice on the continent(s) closest to the poles, but no substantial ice anywhere else.
And, of course, there's always the possibility that we are not entirely correctly measuring CO2 that far back.
there is a lot of uncertainly- 2000 to 4000.
485 million years ago, with different continents/oceans and a sun output that was 30% lower.
try again, this time with more realistic parameters, like the last 10 million years.
BTW, there sure was no 7 billion humans dependent on the ecosystem then.
EDIT.. Kano.. should have said "with the current solar output" happy now? Now, show me an ice age with the continents in their place and the Solar output averaged over the last million years.
During the Ordovician period the solar output was much lower which in turn meant that glaciation occurred when atmospheric CO2 fell below 4000ppm.
ice age? Here's why ice ages occur. Not that you're interested in honest science.
http://en.wikipedia.org/wiki/Milankovitc...
In the graph, note how ice age cycles line up with eccentricity cycles.
Here's a more complete description of the cycles. However, keep in mind that the ice ages fairly accurately line up with the eccentricity cycles.
http://www.eoearth.org/article/Milankovi...
And a brief general synopsis.
http://geography.about.com/od/learnabout...
was more than 4000ppm (the ordovician period) so how can AGW be true.
http://www.acceleratingfuture.com/michael/blog/images/co2-levels-over-time.jpg
