A third meeting of the DUKEMS User Group was held on the 2nd December 2021, with more than 30 participants representing the project team and number of atmospheric modellers across the UK modelling community. Professor Ranjeet Sokhi kindly agreed to chair this user group meeting. The primary purpose of this user group meeting was to give a practical demonstration of the DataLabs and the DUKEMS website.

DataLabs Demonstration

Mike Holloway and Jonathan Cooper from UK CEH demonstrated the use of DUKEMS data in DataLabs. In the demonstration Mike ran a Python Jupyter notebook in DataLabs to refine DUKEMS car emissions data.  To illustrate the detail of data available, he adjusted the proportional contribution of different vehicle (Euro) classes to the emission calculation.  Synchronised maps showed the detail of the emissions and differences as he panned and zoomed.  It illustrated the potential for programmers and modellers to work with DUKEMS data in DataLabs.

The next step for the notebooks is to make available generic tools to assist modellers working with the data - to address finding data, subsetting it, using activity data and how to use the attributes available in the DUKEMS data to construct scenarios.  Generic tools such as re-gridding will be included.  Clear documentation and guides will also be written.

DUKEMS Website Demonstration

For the website, the demonstration showed how emissions datasets could be found, visualised and downloaded.  Dataset discovery was via key dataset links on the home page and also a search box.  Annual emissions data for road traffic was shown in an interactive map that allows stepping through the years and has an inset timeseries chart driven by a placemarker on the map.  The car type details (Euro classes) contributing to the emission could be altered to provide dynamic scenario exploration on the map.  The emission data could be downloaded as a netcdf file.  Point source emissions could also be viewed and downloaded.

We plan to improve the dataset discovery and navigation of the site, to allow high level pollutant first, then sector, then sub-sector navigation through the data.  At each level a map will show the emissions data similar to that shown in the demonstration.  We will be enhancing the metadata and the search box results will match the items you can access via the navigation tree.  More formats will be added to the downloads to try to match what was requested in the workshop.

User feedback was gathered through an interactive session with questions including ‘which file format does your model use?’, ‘what code snippets/libraries do you want to be available?’, and ‘do you have any further comments on handling uncertainties and traceability of data within DUKEMS?’

With input from this meeting, we will aim for the full integration of elements developed in all the science work packages for this project, by Spring 2022. We plan to run a further user group meeting early in 2022, which will enable users to review and feed into the final revision and further implementation of UK-EMS.

Event Date: 

Thursday, 2 December, 2021