Did the models predicting this one get the past 20 years right? With how many free parameters? Tuned after the data collection or before? As a scientist, the r

Did the models predicting this one get the past 20 years right? With how many free parameters? Tuned after the data collection or before? As a scientist, the recent failure of nearly all "predictive" climate change models puts into question the methods used to generate these models.