Articles | Volume 10, issue 11
Geosci. Model Dev., 10, 4145–4173, 2017
Geosci. Model Dev., 10, 4145–4173, 2017
Model description paper
16 Nov 2017
Model description paper | 16 Nov 2017

Curriculum vitae of the LOTOS–EUROS (v2.0) chemistry transport model

Astrid M. M. Manders1, Peter J. H. Builtjes1,4, Lyana Curier1, Hugo A. C. Denier van der Gon1, Carlijn Hendriks1, Sander Jonkers1, Richard Kranenburg1, Jeroen J. P. Kuenen1, Arjo J. Segers1, Renske M. A. Timmermans1, Antoon J. H. Visschedijk1, Roy J. Wichink Kruit2, W. Addo J. van Pul2, Ferd J. Sauter2, Eric van der Swaluw2, Daan P. J. Swart2, John Douros3, Henk Eskes3, Erik van Meijgaard3, Bert van Ulft3, Peter van Velthoven3, Sabine Banzhaf4, Andrea C. Mues4, Rainer Stern4, Guangliang Fu5, Sha Lu5, Arnold Heemink5, Nils van Velzen6, and Martijn Schaap1,4 Astrid M. M. Manders et al.
  • 1TNO, P.O. Box 80015, 3508TA Utrecht, the Netherlands
  • 2RIVM, Antonie van Leeuwenhoeklaan 9, 3721 MA Bilthoven, the Netherlands
  • 3KNMI, PO Postbus 201, 3730 AE De Bilt, the Netherlands
  • 4Institute of Meteorology, Freie Universität, Berlin Carl-Heinrich-Becker-Weg 6–10, 12165, Berlin, Germany
  • 5TU Delft, P.O. Box 5031 2600 GA Delft, the Netherlands
  • 6VORtech, Martinus Nijhofflaan 2, 2624 ES Delft, the Netherlands

Abstract. The development and application of chemistry transport models has a long tradition. Within the Netherlands the LOTOS–EUROS model has been developed by a consortium of institutes, after combining its independently developed predecessors in 2005. Recently, version 2.0 of the model was released as an open-source version. This paper presents the curriculum vitae of the model system, describing the model's history, model philosophy, basic features and a validation with EMEP stations for the new benchmark year 2012, and presents cases with the model's most recent and key developments. By setting the model developments in context and providing an outlook for directions for further development, the paper goes beyond the common model description.

With an origin in ozone and sulfur modelling for the models LOTOS and EUROS, the application areas were gradually extended with persistent organic pollutants, reactive nitrogen, and primary and secondary particulate matter. After the combination of the models to LOTOS–EUROS in 2005, the model was further developed to include new source parametrizations (e.g. road resuspension, desert dust, wildfires), applied for operational smog forecasts in the Netherlands and Europe, and has been used for emission scenarios, source apportionment, and long-term hindcast and climate change scenarios. LOTOS–EUROS has been a front-runner in data assimilation of ground-based and satellite observations and has participated in many model intercomparison studies. The model is no longer confined to applications over Europe but is also applied to other regions of the world, e.g. China. The increasing interaction with emission experts has also contributed to the improvement of the model's performance. The philosophy for model development has always been to use knowledge that is state of the art and proven, to keep a good balance in the level of detail of process description and accuracy of input and output, and to keep a good record on the effect of model changes using benchmarking and validation. The performance of v2.0 with respect to EMEP observations is good, with spatial correlations around 0.8 or higher for concentrations and wet deposition. Temporal correlations are around 0.5 or higher. Recent innovative applications include source apportionment and data assimilation, particle number modelling, and energy transition scenarios including corresponding land use changes as well as Saharan dust forecasting. Future developments would enable more flexibility with respect to model horizontal and vertical resolution and further detailing of model input data. This includes the use of different sources of land use characterization (roughness length and vegetation), detailing of emissions in space and time, and efficient coupling to meteorology from different meteorological models.

Short summary
The regional-scale air quality model LOTOS–EUROS has been developed by a consortium of Dutch institutes. Recently, version 2.0 of the model was released as an open-source version. Next to a technical description and model evaluation for 2012, this paper presents the model developments in context of the history of air quality modelling and provides an outlook for future directions. Key and innovative applications of LOTOS–EUROS are also highlighted.