Craig Poku

Craig Poku


Fog is a high-impact weather event which, over the last three decades, has gained a lot of interest due to its effects on marine, aviation and road transport. There are a number of physical processes, that through their interactions with each other form the fog life cycle. These processes interact on a subtle level, which consequently makes both modelling and forecasting fog difficult. A key process that is poorly understood is the role of microphysics and in particular the role of aerosols on the life cycle of fog.

The formation of fog droplets depends on two main parameters, with these parameters being the prior meteorological conditions and the population of aerosols present. Although research has been conducted to understand the meteorological for the formation and development of fog, there are still some questions related to the fog-aerosol interactions and the uncertainties associated. Some of these questions include whether current models overpredict the number of droplets to some physics not being accounted for and whether aerosol processes (collision and coalescence) matters for the dissipation phase.

To answer these questions, the Met Office NERC Cloud model (MONC) and the Cloud AeroSol Interactive Microphysics (CASIM) model are being coupled to understand this interaction. MONC is a Large-Eddy Simulation (LES) model, that allows for the resolving of turbulent eddies. CASIM is a two-moment microphysics scheme that predicts both mass and number. Features of CASIM include aerosol activation, evaporation and condensation and aerosol processing. Data that will be used is based on a fog field campaign (LANFEX), where observations were taken place by the Met Office in Cardington, Bedfordshire. A combination of these models, as well as observations, will aim to answer key questions and develop a better understanding of the life cycle of fog.

If you're interested, here is a description of my research using the most common 10000 words in the English Language:

'I look tiny water drops in the air close to the ground (also known as 'fog'), and how they play with other tiny drops in the air. This is because we want to look at how tiny water drops in the air close to the ground change over time, and what happens to these drops at a later point.

I use a computer to help me look at these changes over time, by running different jobs on the day. I also use different numbers from the land to make my work more true and better. '

You can have a go here:

Research interests

  • Computational Fluid Dynamics
  • Cloud Microphysics
  • Cloud-aerosol interactions


  • BSc Mathematics, King's College London

Research groups and institutes

  • Institute for Climate and Atmospheric Science