Climate, defined or not, is a function of 3827+ individual variables. Including their linear and nonlinear interactions adds to the current confluence of caca calculations resulting in the cacophony of phony forecasts.
Climate at some place (surface and volume to be defined) on our planet is some function of the integral of location in our solar system vis-à-vis our sun, sun activity, Earth's magnetic and gravitational fields, oversea and undersea volcanic action, ocean subsurface tide movement and temperature, cloud characteristics, wind characteristics, ... I'd ad infinitum but I've run out of navels to count on and the lint is making me sneeze.
All this stuff above is ill-defined and ill-considered by the bogus banshee wailers and flailers at their own failures of scientific honesty.