Ice Ages Linked to Plate Tectonics

CorSci81 writes "A study by scientists at Ohio State University indicates the possibility that ice ages may be triggered by plate tectonics. Scientists speculate that the current ice age may have been triggered 40 million years ago by the uplift of the Himalayas, and this study provides further support by linking a much earlier ice age 450 million years ago with the uplift of the Appalachian mountain range. Additionally, this study reinforces the notion that CO2 concentration in the atmosphere is a major driver of climate."

Comments

There may be a link

[aphxtwn]

I think the researchers are suggesting there *may* be a relationship. It's tough to say anything concrete when researchers/scientists propose a theory making headline news and then someone else throws an idea out either suggesting another cause or contradicting a previous announcement. So far, among the many factors I've heard about ocean salinity, magnetosphere reversal, jet contrails, fossil fuels, green house gases. A lot of it seems more speculation than anything. Maybe it's just me.

Re:There may be a link

[CorSci81]

Two points. One: no one ever said humans are the sole cause. That said, it's clear we are part of what's going on. Two: the implication of the full article is that CO2 has a very large effect on climate. In turn, this implies that the rapid increase in CO2 due to humans may have a very large impact on our climate in a very short time.

And in a sense you have hit the nail on the head. Global warming is very much a political/economic issue and much less a science issue. Even if science can say what will happen, the simple fact is we can't easily reverse what we have already done, which could have consequences for a few centuries.

Now I'll pose a different question to you... what is the cost of doing nothing vs. taking what actions we can to mitigate the risk? The simple fact is we're rolling the dice and there will be winners and there will be losers, and we don't know which will be which. Even if only the least severe scenarios prove to be true, rising sea levels alone present us with an economic burden that far outweighs the costs of doing something now. So we don't understand everything well enough to know the exact outcome; but do we really want to roll those dice? I know I'm not a gambling man.