For a while, I have written about the bizarre assumption made by climate scientists. They cannot prove or show any good link historically between CO2 and warming. What they instead do is show that they can’t explain some of the warming by understood processes, so they assume that any warming they cannot explain is from CO2. Don’t believe me?
Researchers are trying to understand how much of the melting is due to the extreme natural variability in the northern polar climate system and how much is due to global warming caused by humans. The Arctic Oscillation climate pattern, which plays a big part in the weather patterns in the northern hemisphere, has been in "positive" mode in recent decades bringing higher temperatures to the Arctic.
Dr Igor Polyakov, an oceanographer from the International Arctic Research Centre in Fairbanks, Alaska, explained that natural variability as well as global warming is crucial to understanding the ice melt. "A combination of these two forces led to what we observe now and we should not ignore either forces" he said.
The consensus among scientists is that while the natural variability in the Arctic is an important contributor to climate change there, the climate models cannot explain the rapid loss of sea ice without including "human-induced" global warming. This means human activity such as burning fossil fuels and land clearing which are releasing greenhouse gases in the atmosphere.
"There have been numerous models run that have looked at that and basically they can’t reproduce the ice loss we’ve had with natural variability," said Dr Perovich. "You have to add a carbon dioxide warming component to it."
In other words, any warming scientists can’t explain is chalked up to, without proof mind you, CO2. Why? Well, perhaps because it is CO2 that gets the funding, so CO2 it is. To show you how dangerous this assumption is, I note that this study apparently did not consider the effect of man-made soot from inefficient coal and oil combustion (e.g. from China). Soot lands on the ice, lowers its albedo, and causes it to melt a lot faster. Several recent studies have hypothesized that this alternate anthropogenic effect (with a very different solution set from Co2 abatement) may explain much of recent Arctic ice loss.
Here is a big fat clue for climate scientists: It is not part of the scientific method to confidently ascribe your pet theory (and source of funding) to every phenomenon you cannot explain. Or, maybe climate scientists are on to something. Why does gravity seem to work instantaneously at long distances? Co2! What causes cancer cells to turn on and grow out of control? CO2! Hey, its easy. All of our scientific dilemmas are instantly solved.