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  Atmospheric processes and parametrizations

Four groups, each work on different aspects of atmospheric physics which are parametrized in our NWP and climate models. The groups work closely together, and with observational research groups in the Met Office and in several UK universities, to improve our understanding of the processes and hence improve their representation in the operational models.
Boundary layer

This group works on simulation and parametrization of turbulent transports in the atmospheric boundary layer: that portion of the atmosphere which 'feels' the presence of the earth's surface. The group is well known for its work on Large Eddy Simulation (LES) which is an important tool for turbulence modelling.

More about boundary layer research

Clouds and radiation

This group works on the representation of cloud microphysical processes and radiative transfer in the atmosphere. Cloud processes are very complex and this is an area in which observational evaluation is an important input to our work. We have a state-of-the-art radiation code which has been validated against detailed line-by-line codes.

More about clouds and radiation research


This group uses high-resolution simulations of ensembles of convective clouds to improve our understanding and parametrization of convective transports in the atmosphere. Tropical convection is a particularly important and challenging aspect of the subject, as is mesoscale organisation of convection. The group is active in international research collaborations.

More about convection research


This group uses high-resolution simulations of flow over hills and mountains to improve our understanding of the effects of the orography on the flow. For parametrization purposes we need to represent flow blocking and drag effects, and the generation of gravity waves which transport momentum. We are also interested in the prediction of severe weather associated with mountains, such as downslope winds, lee wave rotors, and heavy rain.

More about flow over orography

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Convection group
Flow over orography
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