The 20th International conference on Harmonisation within Atmospheric Dispersion Modelling for Regulatory Purposes (Harmo20) is aimed towards model developers, model users, environmental protection agencies and legislation experts. What distinguishes this conference from many others is its focus on common tools and methodologies.
- Event Type:
- Jun. 14-18, 2021
- Tartu , Estonia
The series of international conferences on Harmonisation within Atmospheric Dispersion Modelling for Regulatory Purposes is concerned with the improvement of “modelling culture” both in Europe and at an international level.
Dispersion modelling is widely used for regulatory purposes, both for permits and for assessments, but there is a lack of sufficient mechanisms to make modelling processes transparent and ensure trust in modelling results.
There are many open questions and aspects of this, such as: Are the models scientifically sound for the purpose they are used? Are the mode
ls validated against observations or physical experiments? Are the models properly used by the experts? Are the users familiar with good practices and do they avoid bad practices? Are model developments sufficiently quality assured? Are reference problems established? Is proper exchange of experiences ensured? Work on these questions is needed in order to assess the air quality impacts on society and nature, on human health, biodiversity and climate.
Such issues that are not specific for one particular model, but common to several, are in focus at the 20th International conference on Harmonisation within Atmospheric Dispersion Modelling for Regulatory Purposes.
The series of Harmonisation conferences started in 1991 (see www.harmo.org) and is a natural forum for discussing modelling issues related to the European Union air quality directives. European networks such as the FAIRMODE network and COST Actions can use the conference in order to expose their work to a wider audience.
The Harmonisation conferences provide the ground where model users and decision-makers can bring their requirements to the attention of scientists and search together for better regulatory tools and indicators for the diverse impacts of air quality.
- Model evaluation and quality assurance – model validation, model intercomparisons, model uncertainties and model sensitivities.
- Environmental impact assessment: Air pollution management and decision support systems.
- Use of modelling in support of EU air quality directives, including FAIRMODE activities.
- Parametrization of Physical Processes and Mathematical Problems in Meteorology and Air Quality Modelling.
- Urban Scale and Street Canyon Modelling: Meteorology, Air Quality and Passive Control Systems.
- Use of modelling in health and exposure assessments.
- Inverse dispersion modelling and source identification.
- Modelling air dispersion and exposure to accidental releases.
- Highlights of past work. Session devoted to reviews and to prominent scientists and ‘golden papers’ of the past, which have still relevance and should not be forgotten.
SS1- Microscale modelling to support ambient air quality directives
A consultation within the FAIRMODE community made clear that micro-scale modelling is increasingly being used in a policy context to support the implementation of the Ambient Air Quality Directives (AAQD). One of the remaining open issues is however the derivation of annual statistics (such as an annual average or percentiles) to support the assessment of the AAQD indicators. FAIRMODE is currently inter-comparing different modelling approaches for computing annual statistics of pollutant concentration in urban areas, and for providing spatial distribution maps relevant for the AAQD. Several European groups are contributing using their own microscale models and methodologies for computing annual statistics.
The aim of this session is, on the one hand, to present the ongoing exercise, its scope and contents, and provide updated information about its current status. On the other hand, this session will be an opportunity to discuss approaches to evaluate and inter-compare the results, and what these results can imply for supporting the implementation of the ambient air quality directives.
Scheduled agenda: 2 hours
Part 1 – PRESENTATION (Fernando Martin): Description of the FAIRMODE CT4 Inter-comparison Exercise and current status.
Part 2 - DISCUSSION: what are the best approaches to evaluate and inter-compare the results
provided by the participants; what implications can be foreseen from the intercomparison
exercise results related to the ambient air quality directives.
SS2 - A CTM intercomparison platform to assess model sensitivities to emission changes
This session focuses on the FAIRMODE activity that addresses the sensitivity of model responses to emission changes. In particular it aims at assessing, discussing, explaining and possibly reducing model discrepancies when models are used for planning purposes. Its aim is to support model users anddevelopers, and, consequently, policy makers. To achieve this, a “Delta”
Scheduled agenda: 2 hours
Part 1 - MOTIVATION AND METHOD: an overall presentation to explain why we set-up this platform, why we came out with this solution to approach the issue, what do we want to check.
Part 2 - PRESENTATION OF THE PLATFORM: introduction to the overall set- up and description of preliminary results achieved.
Part 3 - DISCUSSION: open discussion and planning of next phases.
SS3 - CORONA Virus Covid-19: effects of lockdown on air quality, possible connections with air pollution.
Scheduled agenda: 3 hours
Part 1 - INTRODUCTION TO THE SESSION: a presentation of the actual situation and of the air-pollution items related to the Covid-19 spread.
Part 2 - PRESENTATIONS: oral and poster contributions of (preliminary) studies performed.
Part 3 - DISCUSSION: open discussion and recommendations on how the air-pollution community may contribute to the understanding of the phenomenon.