I would interprete the "ignore" as submission for your part Chalenge. BTW, wasn't that you who choked on the decimals regarding volcanic CO2 ouputs? Must be frustrating for a scientist to mud-wrestle with that kind of logics...
Anyway, Bozon:
"The climate issue has two faces:
1. Is the climate changing.
2. Do humans affect it and HOW. "
About time for a good post. Isn't climate constantly changing anyway? Are we humans effective enough with our various efforts to affect a climate change globally?
Here comes my shot at it. We know that locally we can easily affect climate, that is an old story. We also know that single natural disasters (like eruptions, meteors etc) can easily change global climate by quite some bit. So how big is the human effort, and where. Okay, what we know:
- Earths surface affects how much solar energy is trapped and how much bounced away. We have had a big effect on earth's surface, - however 2/3rds are oceans...
- Earths vegetation affects in the same way, as well as influencing the atmosphere. We have affected that on a grand scale.
- The atmospheric components affect temperature, which is why we are not frozen over completely. We seem to be able to jack up the carbon part quite easily, by fetching it from deep down.
IMHO it is but folly to think that we do NOT affect climate in some way. But by how much and in which direction.
Warming is the theory, since our doings all have effects in that direction, and it also seems to add up.
Climate change is a more subtle term than Global Warming, - maybe because it is less absolute, and gives a space for the fact that a global warming does not have to mean warming EVERYWHERE, but as a total. If GW for instance allows the Gulf stream to run in a different way (due to the ice-mass not pushing it where it goes), some places will warm up by quite a bit, while other will cool by quite a bit. That would be a climate change due to a warming effect....
But we can but wait and see. The next 10 years or so will probably see the end of the debate, - we will see if any records will keep falling during the next solar cycle. But bearing in mind that the hottest year on record (AFAIK) is during an almost solar minimum sort of gives the tune....