Dr Douglas Clark

Dr Douglas Clark

Centre for Ecology & Hydrology
Maclean Building
Benson Lane
Crowmarsh Gifford
OX10 8BB
Tel: +44 (0)1491 838800
Fax: + 44 (0)1491 692424
E-mail: Dr Douglas Clark

Research interests

I am a land surface modeller with particular interests in hydrology and its interactions with other biogeochemical processes. Most of my recent work uses the JULES land surface model and tends to look at the large areas typical of climate models. In particular I am interested in:

  • developing the JULES model so that it can be used for new areas of science, e.g. the nitrogen cycle
  • making the hydrology of land surface schemes more realistic, for example by including better representations of wetlands, dams and reservoirs
  • high-latitude (or cold season) processes – snow and frozen ground
  • the representation of subgrid variability in land surface models: originally this was targeted at runoff generation mechanisms, but variability of soil wetness is important for other biogeochemical processes, such as methane production.


Current work

My current or recent work includes:

  • adding a representation of the terrestrial nitrogen cycle to JULES. This involves coupling JULES to the ECOSSE model of soil C and N processes and the FUN model of plant nitrogen uptake. It is intended that the new model will be the land surface component of UKESM1, the UK's next Earth System Model being developed in a partnership between NERC and the Met Office
  • developing JULES so that it is better able to simulate biogenic fluxes of greenhouse gases in the UK (NERC's GREENHOUSE project)
  • participation in the model inter-comparison projects WaterMIP and ISI-MIP.

Brief CV

1998 - present: Land surface modeller at CEH. Areas of activity have included: hydrology, land-atmosphere interactions, carbon and nitrogen cycles, development of JULES code and documentation.

1995-1998: PhD Meteorology, University of Reading

1994-1995: Research assistant, developing a model of continental-scale hydrology, University of Newcastle Upon Tyne

1993-1994: MSc Engineering Hydrology, University of Newcastle Upon Tyne

1990-1993: BSc Meteorology, University of Reading

Selected publications

See also the NERC Open Research Archive.

Schewe, J. and co-authors, 2013. Multimodel assessment of water scarcity under climate change, Proceedings of the National Academy of Sciences (accepted).

Clark, D.B. and co-authors, 2011. The Joint UK Land Environment Simulator (JULES), model description – Part 2: Carbon fluxes and vegetation dynamics, Geosci. Model Dev., 4, 701-722, doi:10.5194/gmd-4-701-2011.

Best, M.J., M. Pryor, D. B. Clark and co-authors, 2011. The Joint UK Land Environment Simulator (JULES), model description – Part 1: Energy and water fluxes, Geosci. Model Dev., 4, 677-699, doi:10.5194/gmd-4-677-2011.

Haddeland, I., D.B. Clark and co-authors, 2011, Multi-Model Estimate of the Global Terrestrial Water Balance: Setup and First Results. J. Hydrometeorol. 12, 869–884. doi:10.1175/2011JHM1324.1.

Shaffrey, L.C., I. Stevens, W.A. Norton, M.J. Roberts, P.L. Vidale, J.D. Harle, A. Jrrar, D.P. Stevens, M.J. Woodage, M.E. Demory, J.Donners, Clark, D.B. et al. 2009. UK-HiGEM: The New UK High Resolution Global Environment Model - model description and basic evaluation, J. Climate 22 (8), 1861–1896. doi: 10.1175/2008JCLI2508.1

Clark, D.B. and Gedney, N. 2008. Representing the effects of subgrid variability of soil moisture on runoff generation in a land surface model, J. Geophys. Res. – Atmospheres, 113, D10111, doi:10.1029/2007JD008940.

Clark, D.B., C.M. Taylor and A.J.Thorpe, 2004, Feedback between the Land Surface and Rainfall at Convective Length Scales, J. Hydrometeorol. 5(4), 625-639.

A. Boone, F. Habets, J. Noilhan, D. Clark et al., 2004, The Rhône-Aggregation Land Surface Scheme Intercomparison Project: an overview, J. Climate, 17 (1), 187–208.

Bowling, L.C., D.P. Lettenmaier, B. Nijssen, L.P. Graham, D.B. Clark et al., 2003. Simulation of high latitude hydrological processes in the Torne-Kalix basin: PILPS Phase 2(e), 1: Experiment design and summary intercomparisons, Global and Planetary Change, 38 (1-2): 1-30.

Nijssen, B., L.C. Bowling, D.P. Lettenmaier, D.B. Clark et al., 2003. Simulation of high latitude hydrological processes in the Torne-Kalix basin: PILPS Phase 2(e), 2: Comparison of model results with observations, Global and Planetary Change, 38 (1-2), 31-53.

Essery, R. and D.B. Clark, 2003. Developments in the MOSES 2 land-surface model for PILPS 2e, Global and Planetary Change, 38 (1-2): 161-164.

Clark, D.B., C.M. Taylor, A.J. Thorpe, R.J. Harding and M.E. Nicholls, 2003. The  influence of spatial variability of boundary-layer moisture on tropical continental squall lines, Quarterly Journal of the Royal Meteorological Society, 129, 1101-1121.

Taylor, C.M. and D.B. Clark, 2001. The diurnal cycle and African easterly waves: A land surface perspective, Quarterly Journal of the Royal Meteorological Society, 127, 845-867.

Clark, D.B., Y. Xue, R.J. Harding and P.J. Valdes, 2001, Modelling the impact of land surface degradation on the climate of tropical north Africa, Journal of Climate, 14(8), 1809-1822.