It must be global warming.
Of course, when your data doesn’t support your theory, you can always adjust the data:
We just drop the data we think is over representing cooling and add data which over represents warming and voila the cooling goes away. Now if we could just explain why global air temperatures have dropped since 1998. Oh well, I’m sure NASA can find more data to manipulate. maybe we can substitute September data for October data:
That ought to do it. No wait, we can eliminate Antarctic cooling also:
Playing with data is so much fun. I can’t understand why people don’t take the threat of global warming seriously. Mom, throw another log on the fire, it’s -20 outsude. (snark off)