climate change

I watched a programme about Neanderthals the other night and in it they said that 25,000 years ago we had a series of mini ice ages lasting a couple of thousand years. Man can't have caused that so what makes us so arrogant to assume we are causing this change?
 
Never agreed with it being man made. I fully agree that the climate is changing and will change but it is no where near man made. Or influenced greatly by man.
The earth doesn't orbit on a perfectly round path the suns activity can change things. There's vast amounts of reasons.
Saying that, I have no problem with finding alternative energies although wind power is silly.
I believe we should get rid of petrol etc because it's dirty and can affect health.
I'm also sick of the propaganda levelled at us. As well as the missed opportunity to adapt ready for what is inevitable rather than trying to prevent it.
 
BulgarianPride said:
Damocles said:
I'm sorry Skashion, but you're wrong. The IPCC has said that there is now "very high confidence" that climate change is caused by human activities. As I'm sure you're aware, very high confidence constitutes a certainty of 90% or above. AR4 should have been the end of the issue. The debate rages on because of politics, not science. The science was conclusive a long time ago. AR5 will push this into even more definitive language when it is released.

What was the cause of climate change some 10 000 years when the last ice age ended ?

Natural cycles. You'll have a point when you can show that that occurred over the course of 50 years and not 5000 years.
 
Damocles said:
BulgarianPride said:
Damocles said:
I'm sorry Skashion, but you're wrong. The IPCC has said that there is now "very high confidence" that climate change is caused by human activities. As I'm sure you're aware, very high confidence constitutes a certainty of 90% or above. AR4 should have been the end of the issue. The debate rages on because of politics, not science. The science was conclusive a long time ago. AR5 will push this into even more definitive language when it is released.

What was the cause of climate change some 10 000 years when the last ice age ended ?

Natural cycles. You'll have a point when you can show that that occurred over the course of 50 years and not 5000 years.

Is there not a problem whereby it's very difficult to accurately judge the length of time rates of cooling/heating happened over long periods of time as ice cores only go back to the last intraglacial when comparing the current trends in global temperature?
 
SWP's back said:
Damocles said:
BulgarianPride said:
What was the cause of climate change some 10 000 years when the last ice age ended ?

Natural cycles. You'll have a point when you can show that that occurred over the course of 50 years and not 5000 years.

Is there not a problem whereby it's very difficult to accurately judge the length of time rates of cooling/heating happened over long periods of time as ice cores only go back to the last intraglacial when comparing the current trends in global temperature?

I'm totally blaming my current illness for this, but I can't remember to be honest. I seem to think that rock formations weren't affected but that's one of those thoughts that I'm telling myself but don't fully believe. I'm sure one of the others can flesh this one out for you.
 
I can hardly remember myself mate. Did a BSc in Geography and seem to remember a lot of conjecture regarding this and whilst all my tutors thought climate change was real, half thought it a natural cycle and half anthropological with plenty of debate about the accuracy of ice core data and a far greater range of error for anything before that.

Especially as we are judging year by year and decade by decade but historical data looks as huge numbers of years at any one time (thus reducing short term volatility). I did write a couple of very average essays on it but have long since lost them and the fact it was 10 years ago means I can't accurately remember. Now science would have moved along since then but as I say, the anthropological side of things was still far from clear cut back then (including things such as photoplancton blooms taking up most of the man made co2).
 

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