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. During the 1960's with the advent of computers the Met Office was at the forefront in developing the first simple dispersion computer models. However, it was the Chernobyl incident in 1986 that triggered the start of the development around the world of sophisticated atmospheric dispersion models

The short-lived hot period in the south and east is being replaced by a westerly airflow for the UK, bringing showers and some longer spells of rain for some in the coming days and a return to nearer-average temperatures for the time of year. Which day(s) will be dry this week? Find out

that parameterizations need to be able to represent? A review paper on the grey zone of atmospheric turbulence by members of the Grey Zone Project community can be found here: R. Honnert, G. A. Efstathiou, R. J. Beare, J. Ito, A. Lock, R. Neggers, R. S. Plant, H. H. Shin, L. Tomassini, and B. Zhou (2020), The atmospheric boundary layer and the gray zone of turbulence: a critical review, J. Geophys. Res., 125, doi:10.1029/2019JD030317.

ensembles for near real-time attribution of extreme events, Hadley Centre Technical Note 107, Available from https://www.metoffice.gov.uk/research/library-and-archive/publications/science/climate-sciencetechnical-notes Christidis, N., P. A. Stott, A. Scaife, A. Arribas, G. S. Jones, D. Copsey, J. R

attribution of extreme events, Hadley Centre Technical Note 107, Available from https://www.metoffice.gov.uk/research/library-and-archive/publications/science/climate-sciencetechnical-notes Christidis, N., P. A. Stott, A. Scaife, A. Arribas, G. S. Jones, D. Copsey, J. R. Knight, and W. J. Tennant, 2013

effect of urban or forested areas. The speeds are in m/s (1 m/s = 1.94 knots = 2.24 mph). Why is the period 1961 to 1990 used for the long-term averages? The 30-year period 1961 to 1990 has been designated as the international standard reference period for climate change assessment by the World

Technical Note 107, Available from https://www.metoffice.gov.uk/research/library-and-archive/publications/science/climate-sciencetechnical-notes Christidis, N., P. A. Stott, A. Scaife, A. Arribas, G. S. Jones, D. Copsey, J. R. Knight, and W. J. Tennant, 2013: A new HadGEM3-A based system

The model can predict multi-year El Niño events up to 18 months when initialized near a mature El Niño state (Nov 0 ), but underestimates Niño3.4 SST anomalies in the subsequent year (Nov +1 ). Composited temporal evolution of SST, 10m wind anomalies in the equatorial Pacific (5°S-5°N) for multi-year

of interest only, and does not constitute official advice. No representation or warranty (express or implied) is given as to the accuracy or completeness of information contained in this publication. All authors have contributed equally and are listed alphabetically. This work should be cited as: Carter, S

, Hadley Centre Technical Note 107, Available from https://www.metoffice.gov.uk/research/library-and-archive/publications/science/climate-sciencetechnical-notes Christidis, N., P. A. Stott, A. Scaife, A. Arribas, G. S. Jones, D. Copsey, J. R. Knight, and W. J. Tennant, 2013: A new HadGEM3-A based system