My scientific expertise focuses on understanding the processes and environmental controls on carbon and nitrogen cycling, storage and release from a wide variety of terrestrial environments including peatland, grassland, heathland and forest. I lead CEH's Biosphere-Atmosphere Interactions (BAI) Science Area, which seeks to understand and quantify the interactions between the biosphere and the atmosphere. This knowedge is used to inform habitat management and policy on air pollution and climate change. To achieve this, scientists use data from long-term field sites, laboratory and field experiments, and modelling of greenhouse gases, reactive air pollutants, water and energy. My research focuses on the biogeochemistry of terrestrial ecosystems, in particular the influences of chronic, low-level air pollution and climate change on natural and human ecosystems. I have a special interest in cross-disciplinary research, and over my career I have developed joint projects with colleagues in volcanology, isotope geochemistry, waste management technology, palaeoclimatology, ecohydrology and microbial ecology.
2013-present Science Area Lead, Biosphere-Atmosphere Interactions, CEH 2005-2013 Professor of Environmental Science, Manchester Metropolitan University 2004-2005 Visiting Associate Professor, Department of Biology, Villanova University, USA 2003-2005 Senior Lecturer, Department of Earth Sciences, The Open University 1994-2003 Lecturer, Department of Earth Sciences, The Open University