Thursday, 27 January 2011

Man Made Climate Change - a discrepancy in presentation of the facts

Whilst it is reported that 'NASA Targets Children with ‘Climate Kids’ Website', a website that states as fact that 'The planet is warming up fast--faster than at any time scientists know about from their studies of Earth's entire history.' - something that is demostrably untrue - but also that 'Scientists have discovered that humans are causing this warming', really? Is this proven? ClimateQuotes has some more analysis of the NASA site and some facscinating comments that deserve wide readership.

Meanwhile Climate Realists report verbatim from a report by Dr. Don Easterbrook from SPPI that:
'Temperature changes recorded in the GISP2 ice core from the Greenland Ice Sheet show that the global warming experienced during the past century pales into insignificance when compared to the magnitude of profound climate reversals over the past 25,000 years.


If CO2 is indeed the cause of global warming, then global temperatures should mirror the rise in CO2. For the past 1000 years, atmospheric CO2 levels remained fairly constant at about 280 ppm (parts per million). Atmospheric CO2 concentrations began to rise during the industrial revolution early in the 20th century but did not exceed about 300 ppm. The climatic warming that occurred between about 1915 and 1945 was not accompanied by significant rise in CO2. In 1945, CO2 emission began to rise sharply and by 1980 atmospheric CO2 had risen to just under 340 ppm. During this time, however, global temperatures fell about 0.9°F (0.5° C) in the Northern Hemisphere and about 0.4°F (0.2° C) globally. Global temperatures suddenly reversed during the Great Climate Shift of 1977 when the Pacific Ocean switched from its cool mode to its warm mode with no change in the rate of CO2 increase. The 1977–1998 warm cycle ended in 1999 and a new cool cycle began. If CO2 is the cause of global warming, why did temperatures rise for 30 years (1915-1945) with no significant increase in CO2? Why did temperatures fall for 30 years (1945-1977) while CO2 was sharply accelerating? Logic dictates that this anomalous cooling cycle during accelerating CO2 levels must mean either (1) rising CO2 is not the cause of global warming or (2) some process other than rising CO2 is capable of strongly overriding its effect on global atmospheric warming.'

I look forward to NASA's apology for producing such misleading information, but I fear I will wait in vain.


Anonymous said...

A lot of kids do not believe in ACC already. I think they are losing the next generation of environmentalists by using approaches such as this.

Alex said...

"If CO2 is indeed the cause of global warming, then global temperatures should mirror the rise in CO2."

Sorry but this is just bad logic. I am not saying that I fall for the AGW aganda, but it is clearly does not necessarily follow that if CO2 is the cause of current warming, then istoric temperature rises should track CO2 levels. It is at best a plausible hypothesis, not a logical consequence.

Not a sheep said...

Sorry Alex but I disagree; if CO2 is the cause of global warming then you would expect to see CO2 and temperature move together, allowing for time differences of course.

Alex said...

What you would "expect to see" and how much you would need to see before you would change your opinion should be two very different quantities. I suspect that most of this climate analysis will turn out to be worse than useless simply because there is so much climactic variation from other factors that trying to link it to manmade CO2 will turn out to be pointless. But equally any attempt to refute the points of AGW proponents by disproving a correlation between annual CO2 levels and temperature is equally suspect.

Grant said...

The problem with the natural world outside the laboratory is that it is impossible to isolate one factor and exclude all the others.