Thoughts on post
1. As usual, this was an interesting and informative post
2. Your "word from our sponsors" part seemed a bit like one of those TV drug ads, where they introduce some medicine and talk about how wonderful it is, but then describe its side effects really quickly, in a manner that sounds kind of funny. (Use of xxx has been linked to such problems as finger cancer, growing a tail, and minor cases of death. See your doctor for details.)
So, you could almost have done something like that for this: (spoken quickly) "Following the ENSO blog regularly has been found to result in users understanding this atmospheric phenomenon a little better, rolling their eyes at news reports sensationalizing El Nino and La Nina, and amazing their friends and family with their weather knowledge. Individual user experiences may vary. See your friendly ENSO blogger for details."
All joking aside, this was an educational post. Thanks for your hard work.