Data from the QUEST PalaeoQUMP project. This used palaeodata to reduce uncertainties in climate prediction and was a QUEST (Quantifying and Understanding the Earth System) Theme 2 project (The natural regulation of atmospheric composition on glacial-interglacial and longer time scales). PalaeoQUMP was headed by Prof Sandy Harrison of the University of Bristol, with co-investigators at the University of Southampton and Durham University. Dataset contains results from running a series of simulations of the modern climate, systematically altering parameter values and comparing them with observations.