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Originally Posted by ThunderChild
Hello Mr ving. I can not claim to be an expert (or even particularly knowledgable) in this field and so have no immediate answer - although I will look into it further when I have time (after Snake Valley this weekend!  ). |
now you are just making me jealous!
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Originally Posted by ThunderChild
Yes, there is a large variation of temperature over earth history - but those peaks and troughs take place over millenia, not decades. What we have now is significantly sharper within the context of the time period under scrutiny.
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you make it sound like our last iceage was just last week
. according to the graph i posted the past 2000 or so years have been on a plateau, proir to that there was a really steap climb and undoubtedly we are in for yet another increase for the peak to reach that of the previous peak. this peak will come at a fast rate just like the rest of the peaks over the last 400,000 year and we may or may not be contributing, but regardless of weather we contribute or not (and i dont think we make that much of a difference despite the CO2s being released) there is no stopping it cause its a natural cycle.
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What I find even more interesting is how they obtained that data. That dat a was taken from polar ice samples. Those ice samples show not only changes to temperature, but also CO2 levels among other things. And the levels of green house gases present now completely blow out of the water anything we had in our entire past history.
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gee we know how to stuff up a planet dont we!
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Never presume that the presence of previous cycles and changes precludes us from inducing changes of our own. It's the first time in history we've been able to do so.
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I believe once again that we are in the middle of a cycle and we may interfered with said cycle as shown in the plataeu that has occurred for the last 2000 years (per graph again). prior to the plateau there was a really fast rise, then it just stopped going up... did we cause that? it was within the last 2k years... I think its due for a fast rise again.
yeah we are stuffing up our very own air, but are we
really causing climate change?