Before joining NPL and the University of Edinburgh, Tim was a Senior Scientist at the Met Office Hadley Centre. Prior to this, he spent more than five years in the USA at the University of California, San Diego, as a postdoctoral scholar studying atmospheric composition change. Tim holds an MSci in Natural Sciences from the University of Cambridge and a PhD in isotope geochemistry from Imperial College London.
Tim's research helps improve our understanding of the sources of greenhouse gases. He is especially interested in the use of high-precision ground-based measurements that are sensitive to emissions on local to regional scales. Emissions can be quantified from these measurements using atmospheric transport models within a mathematical inversion framework. Developing novel measurement methods and improving the quality of information within this framework holds promise to reduce emissions estimate uncertainties and help focus climate change mitigation efforts.