I consider the concept of a global mean temperature to be somewhat dubious. A single number cannot adequately capture climate c hange. This number, as I see it, is aimed mostly at politicians and journalists.

I consider the concept of a global mean temperature to be somewhat dubious. A single number cannot adequately capture climate c hange. This number, as I see it, is aimed mostly at politicians and journalists.

You can swim (uncomfortably) in water at a temperature slightly above freezing; a tiny drop in temperature-or a miracle-allows you to walk on water.