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parts a er midday, clearing eastwards on the 2nd followed by sunshine and scattered showers, these wintry on high ground. Needles (Isle of Wight) recorded gusts to 55 mph on the 2nd. A ridge of high pressure brought a dry sunny start in most places on the 3rd but it clouded over from the west

particles, such as sulphate from industrial sulphur dioxide emissions; smoke from burning of agricultural waste, and pollution particles from traffic emissions. These atmospheric particles scatter and absorb sunlight and terrestrial radiation and also act as cloud condensation nuclei and modify

from fog persisting on some eastern coasts, with 15.8 hours of sunshine at Whitby (North Yorkshire). Most places started fine on the 2nd, but showers spread from the south-west, initially with isolated thunderstorms, reaching central and northwestern parts by early evening, while low cloud off

variable cloud and a scattering of showers following.    Temperatures throughout the day will be around average or slightly higher than average in places with highs of 19°C, although cooler in the Southeast with the focus of higher temperatures further North and West.    Wednesday evening will see

is cloud free and surface features such as coastlines, the snow-covered Alps and variations in the Northern Sahara desert surface are clearly visible. Geostationary satellites orbit at around 36,000 km above the Earth's surface and have an orbital period of one day, meaning they remain at a fixed

The representation of solar and infra-red radiation, and its interaction with clouds in our numerical models.

Various radiative processes occur in the atmosphere: gases, aerosols, cloud droplets and ice crystals absorb radiation and emit thermal radiation. Aerosols, cloud particles and air molecules scatter radiation. The surface absorbs, reflects and emits radiation. The radiative properties

Charlie specializes in modelling the dispersion of volcanic eruption clouds using the Met Office's Numerical Atmospheric-dispersion Modelling Environment (NAME).

Areas of Expertise Volcanic cloud transport and dispersion   Current Activities Charlie is working in the Volcanic and Chemical Dispersion team of the Atmospheric Dispersion and Air Quality (ADAQ) group within Weather Science. Charlie is currently working on the development of resuspended volcanic

Areas of expertise Model Evaluation Seamless modelling approach Understanding cloud processes Process-orientated metrics of model performance Publications by Keith Williams Current activities Keith heads the Atmospheric Processes and Parametrizations group. The group is responsible

not routinely measured but important for model process understanding. Areas of key interest Measure updrafts, turbulence and dynamical structures in convective clouds on fine scales. Understand effect of pre-convective environment on subsequent storm development. Interaction between boundary layer structures

fraction 12. surface (skin) temperature Un-split File 2 [yyyymmddhhmm_u1096_ng_umqv_Wholesale2.grib] Full domain, all available time steps and the following surface level parameters: 1. low cloud amount 2. medium cloud amount 3. high cloud amount 4. convective cloud base height 5. convective cloud top