People > Dr James Clark

Dr James Clark

Marine Ecosystem Modeller

Contact Details

+44 (0)1752 633100 (switchboard)


Dr James Clark is a senior scientist who works within the Marine Ecosystem Modelling Group at PML. He has a Masters degree in Physics with Astrophysics from the University of York, and a PhD in Environmental Science from the University of East Anglia.

His research interests span a range of topics, including evolutionary adaptation and acclimation in phytoplankton, marine ecology, marine biogeochemistry, marine pollution and machine learning for automatic plankton identification.

He leads the PML modelling group’s work on microplastics and has developed the offline particle tracking model PyLag which can be used to simulate the movement and fate of microplastics in the marine environment, and in particular the coastal ocean. He is also the PML Principle Investigator (PI) for the UK Environmental Predictions project (2017 –). Previously, he was the PI for the Copernicus Climate Change Marine, Coastal and Fisheries Sectoral Information System project (2018 – 2019).

He is Primary Supervisor for two current PhD students and secondary supervisory for two more. His publications since 2015 have received > 1100 citations (h-index 12).


Mission Atlantic
Mission Atlantic

Contact: Dr Jorn Bruggeman

"Towards the sustainable development of the Atlantic Ocean: Mapping and assessing the present and future status of Atlantic marine ecosystems...

The Economics of Marine Plastic Pollution: What are the Benefits of International Cooperation
The Economics of Marine Plastic Pollution: What are the Benefits of International Cooperation

Contact: Dr James Clark

The Economics of Marine Plastic Pollution: What are the Benefits of International Cooperation? project is calculating the economic costs of the...

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Other key projects

UK National Capability in Marine System Modelling (NERC)

Selected key publications

Kreft, J.-U., Plugge, C. M., Grimm, V., Prats, C., Leveau, J. H. J., Banitz, T., Baines, S., Clark, J. R., Ros, A., Klapper, I., Topping, C. J., Field, A. J., Schuler, A., Litchman, E., & Hellweger, F. L. Mighty small: Observing and modeling individual microbes becomes big science Proceedings of the National Academy of Sciences, 2013, 110, 18027-18028

Toseland, A., Daines, S., Clark, J. R,, Kirkham, A., Strauss, J., Uhlig, C., Lenton, T., Valentin, K., Pearson, G., Moulton, V., Mock, T., The impact of temperature on marine phytoplankton resource allocation and metabolism. Nature Climate Change 2013 10.1038 / nclimate1989

Clark, J. R., Daines S., Williams, H. T. P., Lenton T. M., 2013. Environmental selection and resource allocation determine spatial patterns in picophytoplankton cell size. Limnology and Oceanography, 58, 1008-1022.

Boyle, R. A., Clark, J. R., Poulton, S. W., Shields-Zhou, G., Canfield, D. E., Lenton, T. M., 2013. Nitrogen cycle feedbacks as a control on euxinia in the mid-Proterozoic ocean. Nature Communications, 4, 1533

Clark, J. R.,  Daines S., Lenton T. M., Watson A. J., Williams, H. T. P., 2011. Individual-based modelling of adaptation in marine microbial populations using genetically defined physiological parameters. Ecological Modelling. 222(23-24), 3823-3837.