Preprints
https://doi.org/10.5194/acp-2021-306
https://doi.org/10.5194/acp-2021-306

  02 Jun 2021

02 Jun 2021

Review status: a revised version of this preprint was accepted for the journal ACP and is expected to appear here in due course.

The impact of nitrogen and sulphur emissions from shipping on exceedances of critical loads in the Baltic Sea region

Sara Jutterström1, Filip Moldan1, Jana Moldanová1, Matthias Karl2, Volker Matthias2, and Maximilian Posch3 Sara Jutterström et al.
  • 1IVL Swedish Environmental Institute, Box 53021, SE-400 14 Gothenburg, Sweden
  • 2Chemical Transport Modelling, Helmholtz-Zentrum Geesthacht, D-21502 Geesthacht, Germany
  • 3International Institute for Applied System Analysis (IIASA), Schlossplatz 1, A-2361 Laxenburg, Austria

Abstract. The emissions of nitrogen (N) and sulphur (S) species to the atmosphere from shipping significantly contribute to S and N deposition near the coast, and to acidification and/or eutrophication of soils and freshwaters. In the countries around the Baltic Sea the shipping volume and its relative importance as a source of emissions are expected to increase if an efficient regulation would not be implemented. To assess the extent of environmental damage due to ship emissions for the Baltic Sea area, the exceedance of critical loads (CLs) for N and S has been calculated for the years 2012 and 2040. The paper evaluates the effects of several future scenarios including the implementation of NECA and SECA (Nitrogen resp. Sulphur Emission Control Areas). The implementation of NECA and SECA caused a significant decrease in exceedance of critical loads for N as a nutrient while the impact on the – already much lower – exceedance of critical loads for acidification was less pronounced. The relative contribution from Baltic shipping to the total deposition decreased from 2012 to the 2040 scenarios for both S and N. In contrast to exceedances of CLs for acidification, shipping still has an impact on exceedances for eutrophication in 2040.

Sara Jutterström et al.

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on acp-2021-306', Anonymous Referee #1, 24 Jun 2021
  • RC2: 'Review of manuscript acp-2021-306', Anonymous Referee #2, 19 Jul 2021
  • AC1: 'Comment on acp-2021-306 Authors response', S. Jutterström, 27 Aug 2021

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on acp-2021-306', Anonymous Referee #1, 24 Jun 2021
  • RC2: 'Review of manuscript acp-2021-306', Anonymous Referee #2, 19 Jul 2021
  • AC1: 'Comment on acp-2021-306 Authors response', S. Jutterström, 27 Aug 2021

Sara Jutterström et al.

Sara Jutterström et al.

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Short summary
For the Baltic Sea countries, the shipping emissions are an important source of air pollution. This study investigates the contribution of shipping emissions to acidification and eutrophication of soils and freshwaters within the airshed of the Baltic sea in the years 2012 and 2040. The implementation of emission control areas and improving energy efficiency significantly reduces the negative impact on ecosystems expressed as decrease in exceedence of critical loads for sulphur and nitrogen.
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