There are actually dozens of models, and almost all fail spectacularly. There is one that isn’t that bad. Russian, iirc.
They are all complicated computer programs, written mostly by people with their own agendas. And most of the temperature data used as an input has been “adjusted” numerous times prior to running the program.
The “adjustments” always significantly decrease padt data, so it looks warmer today. For real. NASA’s data has been adjusted this way so many times that it is considered garbage.
The whole field is riddeled with corruption and incredible bias.
Re: “The whole field is riddled with corruption and incredible bias.”
Part of the reason that Democrats and the MSM are trying to destroy EPA Administrator Scott Pruitt is because Pruitt is implementing a new policy that all data and all calculations must be publicly released for any “study” that is used by the EPA to create new agency rules and regulations.
I find it very alarming that Trump is doing almost nothing to defend Pruitt, who is probably the only consequential Conservative in the Trump Administration.