TFMM provides a forum to the EMEP Centres, national experts, international organizations for scientific consideration and evaluation of activities regarding pollution assessment. MSC-E takes part in the work of the Task Force annually presenting the outcome of its studies on HMs and POPs and discussing a number of topics, particularly, fine spatial resolution modeling and country specific case studies on the assessment of HM pollution levels on national scale, development of global scale multi-pollutant modeling system (GLEMOS).
The outcome of MSC-E activities related to the model assessment of heavy metal and POP pollution in the EMEP region was discussed at the recent online TFMM meeting held in 2020.
In particular, results of a national-scale case study of heavy metal pollution in Germany were presented. They included modelled levels of Pb, Cd and Hg in Germany in 2014-2016 and their evaluation against EMEP and national measurement data. Possible reasons of the identified discrepancies between modelled and observed levels were analyzed. It was shown that fine resolution modelling on a country scale provided detailed patterns of heavy metal pollution and reasonably reproduces background EMEP measurements. The inclusion of measurement data from national monitoring networks significantly increased the potential of the modelling results verification.
The progress in the assessment of POP pollution in the EMEP region was outlined with focus on the pollution by toxic PAHs. Main emphasis in this work was given to the evaluation of contemporary PAH pollution levels and their trends during the two recent decades. It was shown that observed and modelled air concentrations of the 4 PAHs, defined in the POP Protocol, were still high and continued to exceed air quality guidelines. To improve assessment of B(a)P long-range transport and seasonal variability, research activities in framework of B(a)P case study for Poland and multi-model analysis of B(a)P pollution within the EMEP EuroDelta-Carb inter-comparison were initiated. Along with this, importance of consideration of wider list of toxic PAHs was emphasized and experimental model simulations were carried out to estimate population exposure to mixture of 16 toxic PAHs. Specific attention was also paid to the interaction of PAHs and PM in the atmosphere, and contribution of toxic PAHs to the adverse effects of aerosol particles. Finally, it was stressed that this work was considered as the contribution to the analysis of the effectiveness of POP Protocol in line with the Long-term Strategy of the Convention.
A number of research issues and initiatives related to air pollution modelling were discussed at the TFMM meeting. Some of them could be further applied for the analysis of heavy metal and POP pollution levels. In particular, joint EMEP initiative on evaluation of COVID-19 lockdown effect on pollution levels was considered as future TFMM activity.