These uncertainties derive from the sheer complexity of the climate system, insufficient and incomplete data sets, and inconsistent results given by current climate models. (earthobservatory.nasa.gov)
Scientists with climate expertise have considered not just the narrow sampling of the scientific literature that Crichton cites but many hundreds of additional papers in order to understand the full complexity of the climate system. (ucsusa.org)
Clearly, to use a single value (the global average annual average surface temperature trend) to characterize global warming is a naive approach and is misleading policymakers on the actual complexity of the climate system. (judithcurry.com)