Originally from the UK I have worked previously in the United Kingdom, the United States and Norway. Presently I am a Professor in the Department of Geography at Maynooth University, Ireland. My research interests are in understanding the observational evidence basis for climate changes and variability. I chair the International Surface Temperature Initiative and co-chair the GCOS Reference Upper Air Network. I was a lead author on both the Working Group 1 contribution to IPCC AR5 and on the third US National Climate Assessment.