Submitted as: development and technical paper 01 Apr 2021

Submitted as: development and technical paper | 01 Apr 2021

Review status: this preprint is currently under review for the journal GMD.

Development of a moving point source model for shipping emission dispersion modelling in EPISODE-CityChem v1.3

Kang Pan1, Mei Qi Lim1, Markus Kraft1,2,3, and Epaminondas Mastorakos1,4 Kang Pan et al.
  • 1Cambridge Centre for Advanced Research and Education in Singapore LTD., 1 Create Way, #05-05 Create Tower, Singapore, 138602
  • 2School of Chemical Engineering and Biotechnology, University of Cambridge, West Cambridge Site, Philippa Fawcett Drive, Cambridge, CB3 0AS, UK
  • 3Department of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore, 637459
  • 4Department of Engineering, University of Cambridge, Trumpington Street, Cambridge, CB2 1PZ, UK

Abstract. This paper demonstrates the development of a moving point source (MPS) model for simulating the atmospheric dispersion of pollutants emitted from ships under movement. The new model is integrated into the chemistry transport model EPISODE-CityChem v1.3. In the new model, ship parameters, especially speed and direction, are included to simulate the instantaneous ship positions and then the emission dispersion at different simulation time. The new model was then applied to the shipping emission dispersion modelling. The simulated instantaneous and hourly-averaged emission concentrations were compared to those obtained by the commonly-used line source and fixed point source models. More realistic results were observed by using the new model. Furthermore, the simulated results were compared to the measured values at different locations, and reasonable emission concentrations can be predicted by the moving point source model.

Kang Pan et al.

Status: open (until 27 May 2021)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on gmd-2021-47', Anonymous Referee #1, 19 Apr 2021 reply

Kang Pan et al.

Model code and software

Moving point source (MPS) model Kang Pan

Kang Pan et al.


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Short summary
A new moving point source (MPS) model was developed to simulate the dispersion of emissions generated by the moving ships. Compared to the commonly used line source (LS) or fixed point source (FPS) model, the MPS model predicted more realistic emission distribution generated from the moving ships and matched reasonably with the measurements. Therefore, the MPS model provides an alternative for the environmental society to evaluate the pollutant dispersion contributed from the moving ships.