The Climatic Research Unit undertakes pioneering research on the nature, predictability and impact of natural and anthropogenic climate change, maintaining a position as a world authority in the field. Five lead authors for the latest Intergovernmental Panel on Climate Change (IPCC) are drawn from the unit. The global land and marine surface temperature record maintained by the Unit is used extensively in climate change studies. The work of Jones and co-workers with this record can justifiably be claimed to have been central to the acceptance that humans are having a significant impact on climate. Jones has also been involved with many of the climate change detection exercises which have attempted to attribute recent changes to human influences.