The latest drivel from anti-Science Global Warming Deniers is this:

Global warming stopped in 1998 and it has been cooling since then.

I am hearing this all over the place. What they then do is carefully pick the temperatures from individual years and compare them with other individual years to try and show a pattern that suggests cooling. There are three problems with this.

First, the possibility of cooling trends, locally or temporary, is quite likely within a general warming trend. Climate does not change linearly, but will vary up and down from year to year. This is why, as I will say again below, individual years are not significant. An individual year can include anomalies like El Nino or La Nina conditions. In addition, things like volcanic eruptions can cause temporary cooling (something deniers like Rush Limbaugh seemed to ignore when they used to claim, in the 1990's, that global warming was caused by Mt. Pinatubo). An initial cooling over Antarctica was predicted by the global warming models. This Antarctic cooling has been used by some deniers, who either don't realize or ignore that temporary cooling of Antarctica was predicted by the models, as "evidence" that global warming wasn't happening. Well, as predicted, that cooling trend has ended even in Antarctica. The only deviation from what was predicted by the models was the temporary cooling didn't last as long as predicted.

Second, there is a major error made by the deniers: you do NOT judge science based on selected data points. Only using a complete data set. The deniers cherry pick individual years to make their point. Scientists use entire data sets. When you do that, THIS is what you see:

And THIS:

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