Originally posted by: nerp
Originally posted by: actuarial
Why doesn't someone just plot average world temperatures over what world temperatures should be from the last ice age to the next?
They have. And we're a lot warmer than we should be. We should be getting cooler. We're not. We're warmer than we should be. There is no natural reason for this other than external inputs (man).
You can't deny this. If you do, you haven't done the necessary reading.
Honestly, if people did more reading, most of these questions wouldn't be on the table.
So when is the next ice age, and what's the typical variation in the path of temperatures from one to the next?
Look, I'm not saying that global warming isn't real. I just doubt that we have enough knowledge to even begin to know for sure. We have accurate data for what, the last 100 years of a 26,000 odd year non linear cycle (I think I read about 26,000 years between ice ages).
How confident would you be predicting the stock market for the rest of the year based on the last 5 minutes of market movements?
Now, aside from that, for ANYONE on this forum especially to try and trot out saying that global warming is 100% real or not based on other people's studies they've read is hilarious. I've read stuff that says it's real, and stuff that says it's not. We are so far from a consensus on this that definitively saying one way or another is pure anti-science.
The main argument I've heard is that plotting CO2 levels against average surface temperature reveals a positive correlation. I don't have much confidence in this frankly, being that I'm a stats major and it was drilled into our head not to assume causality from correlation. I've also read a lot of stuff about changing measurement methods mid study, and also that the lag of the movements actually suggest CO2 increases follows temperature rises. Both of these things makes my stats senses go bonkers.
On the other hand, I can see the smog in the air below me from my apartment window. That sure as shit is hurting the environment, as my lungs clearly tell me. Also, C02 is a greenhouse gas and the levels of it are increasing. This certainly makes me want to study this further going into the future, and how much of that C02 increase is caused by us, and what impact overall it would have on global temperatures.
Finally, I have yet to be convinced that global warming is a bad thing over the short term, and we will probably be far better able to handle it in the not so distant future without major economic concessions. I do like that we are moving towards reducing our dependence on oil though for the same reasons that I don't through my trash in the forest.