“For instance, by some measures global average surface temperature has slowed its rate of increase or even paused over the past decade or so. Some point to this as evidence that climate change, as measured by the warming of global average surface temperature, has stopped. While such a slowdown might give scientists good reasons to ask hard questions of climate model projections, it has been going on for too short a time period to understand what, if anything, it might be telling us about changes in climate, which is only discernible on longer time scales.”