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Quantifying the changes in the radiative properties of marine stratocumulus due to different factors
No full textThe radiative properties of marine stratocumulus, which affect the global climate, are influenced by a number of factors including aerosols, the temperature profile, the presence of drizzle, the surface heat flux and the entrainment of warm dry air from above the cloud layer. As part of VOCALS-UK we are investigating the effects of these different factors on the small scale structure and microphysics of marine stratocumulus, and hence on its radiative properties, by using the Met Office Large Eddy Model. The model simulations are validated against measurements from the BAe-146 research aircraft obtained during the VOCALS field campaign, over the southeast Pacific in October and November 2008, and the relative contributions of the different factors are then analyzed by using the 'factorial' method of Teller and Levin
A climatology of flow and turbulence at 190 m above central London
No full textThe structure of the surface layer over homogeneous terrain is quite well understood, however there is not thorough knowledge of the corresponding structure over urban areas. The aim of this work is to study turbulent fluxes and variances in the framework of local similarity theory. A sonic anemometer and Vaisala weather station were mounted atop BT tower (at 190 m) from 2003 onwards. Implications include understanding local urban climates for weather prediction and pollutant dispersion purposes.
[This work will be submitted to Boundary-Layer Meteorology for peer-review in late 2009.
National Centre for Earth Observation Top Stories 2008/09
No full textThe National Centre for Earth Observation is one of the NERC's research and collaborative centres. The NCEO has now been running for just over a year (from April 2008). This brochure is a selection of NCEO's early scientific achievements
