Meteorological data from Lyneham for 1995 were used in the intercomparison study. The data were obtained from the UK Meteorological Office in two formats; firstly for ADMS and, after processing through AERMET, for AERMOD; secondly in a form suitable for input to ISC. The UK Meteorological Office have kindly agreed to allow the data to be made available here for further intercomparison studies.

We have also, with their permission, included the equivalent meteorological data files from Trinity Consultants Inc. for comparative purposes. These are also Meteorological Office data, but are obtained via the National Climatic Data Centre (NCDC), Washington, and are processed slightly differently. A more detailed discussion can be found in ‘Meteorological Data and Dispersion Modelling’, which can be downloaded in Section 6 of this Archive.

These data were used in the supplied forms for the annual calculations. For ADMS, the hourly calculations were carried out by supplying the required meteorological data within the model input files. However in order to run the hourly calculations in AERMOD and ISC, calculations were made for selected hours within the year. For direct comparison between the models, some editing of the basic meteorological files was necessary. For example, the wind direction for the required hours was changed to 270°, or westerly, for convenience. There were also some changes needed for the calculations involving boundary layer interaction. The resulting data files are all included in the dataset and are detailed in Table 8.

A zip file containing all the meteorological data is provided for downloading:

* Met data for single hour ADMS calculations are included in .apl input file

1. these files are the datafiles as supplied by the UK Meteorological Office

Trinity Consultants versions of meteorological data for Lyneham 1995 :