Like any other field, research on climate change has some fundamental gaps, although not the ones typically claimed by sceptics. Quirin Schiermeier takes a hard look at some of the biggest problem areas.
As climate scientists battle climate sceptics, they should note that we have been here before, say Naomi Oreskes and Erik M. Conway. History holds lessons for how researchers can get their message across.
As calls for reform intensify following recent furores about e-mails, conflicts of interest, glaciers and extreme weather, five climatologists propose ways forward for the Intergovernmental Panel on Climate Change.