The climate is a physical phenomenon.
You might as well consider every philosopher an authority on everything because every problem ever solved was solved by thinking and that's what philosophers do. While in reality philosophers are only authorities on (the history of?) philosophy.
Some philosophers follow logic but apply it to unanswerable questions. Some can't even do the logic part rigorously enough. Personally I have no respect for this field of culture and humans that pursue it. All of them are not even wrong.