56
J. Bartnicki
Germany and Poland are the main sources contributing to oxidized nitrogen deposition to the Baltic Sea basin with 23.4 kt N and 17.8 kt N, respectively. This correspond to 17.9 and 13.6% of the total annual oxidized nitrogen deposition to the Baltic
Sea basin in 2014 which is 131 kt N. There is also a significant contribution from
the ship traffic on the Baltic Sea (15.2 kt N) and ship traffic on the North Sea (10.3
kt N), corresponding to 11.6% and 7.8%, respectively. In addition to Germany and
Poland, Russia, Sweden and Denmark are the HELCOM Contracting Parties among
ten major contributors. Nitrogen emissions in all HELCOM countries together contribute 51% to oxidised nitrogen deposition. Two distant emission sources (United
Kingdom and France) can be found among top ten contributors.
In case of reduced nitrogen deposition to the Baltic Sea basin, Germany dominates
the list with 31.2 kt N corresponding to 28.8% contribution to annual deposition in
2014. Three other HELCOM countries are next on the list: Poland, Denmark and
Sweden with 15.7 kt N, 10.9 kt N and 7.6 kt N, respectively corresponding to 14.5%.
10.1% and 7.0% contribution. Altogether HELCOM countries contribute 74% to
reduced nitrogen deposition. In general contribution of the sources located close to
the Baltic Sea is more significant in case of reduced nitrogen deposition than in case
of oxidized nitrogen deposition. However, three distant sources: Belarus, France and
Netherlands are also present on the Top Ten list for reduced nitrogen deposition.
Transportation and combustion are the main emission sectors contributing to oxidised nitrogen deposition, whereas, agriculture is the dominating emission sector
contributing to reduced nitrogen deposition.
9.4 Conclusions
Atmospheric nitrogen deposition to the Baltic Sea basin has been calculated with
the EMEP/MSC-W model for each year of the period 1995–2015. Compared to
1995 there is clear reduction of oxidized nitrogen deposition in the year 2015, both
in annual (−33%) and normalized deposition (−35%). The situation is different in
case of reduced nitrogen deposition. However, the normalised deposition is declining
(12%) in 2014 compared to 1995 deposition, the annual deposition is 5% higher in
2014 than in 1995. Also, uncertainty related to variable meteorology is higher for
reduced nitrogen deposition than for oxidized nitrogen deposition.
Germany and Poland are the main sources contributing to oxidized nitrogen deposition to the Baltic Sea basin with 23.4 kt N and 17.8 kt N, respectively. This correspond to 17.9% and 13.6% contribution, respectively. There is also a significant
contribution from the ship traffic on the Baltic Sea (15.2 kt N) and North Sea (10.3
kt N), corresponding to 11.6% and 7.8%, respectively.
In case of reduced nitrogen deposition to the Baltic Sea basin, Germany dominates
the list with 31.2 kt N corresponding to 28.8% contribution to annual deposition in
2014. Three other HELCOM countries follow Germany on the list: Poland, Denmark
and Sweden with 15.7 kt N, 10.9 kt N and 7.6 kt N, respectively corresponding to
14.5%. 10.1% and 7.0% contribution.
J. Bartnicki
Germany and Poland are the main sources contributing to oxidized nitrogen deposition to the Baltic Sea basin with 23.4 kt N and 17.8 kt N, respectively. This correspond to 17.9 and 13.6% of the total annual oxidized nitrogen deposition to the Baltic
Sea basin in 2014 which is 131 kt N. There is also a significant contribution from
the ship traffic on the Baltic Sea (15.2 kt N) and ship traffic on the North Sea (10.3
kt N), corresponding to 11.6% and 7.8%, respectively. In addition to Germany and
Poland, Russia, Sweden and Denmark are the HELCOM Contracting Parties among
ten major contributors. Nitrogen emissions in all HELCOM countries together contribute 51% to oxidised nitrogen deposition. Two distant emission sources (United
Kingdom and France) can be found among top ten contributors.
In case of reduced nitrogen deposition to the Baltic Sea basin, Germany dominates
the list with 31.2 kt N corresponding to 28.8% contribution to annual deposition in
2014. Three other HELCOM countries are next on the list: Poland, Denmark and
Sweden with 15.7 kt N, 10.9 kt N and 7.6 kt N, respectively corresponding to 14.5%.
10.1% and 7.0% contribution. Altogether HELCOM countries contribute 74% to
reduced nitrogen deposition. In general contribution of the sources located close to
the Baltic Sea is more significant in case of reduced nitrogen deposition than in case
of oxidized nitrogen deposition. However, three distant sources: Belarus, France and
Netherlands are also present on the Top Ten list for reduced nitrogen deposition.
Transportation and combustion are the main emission sectors contributing to oxidised nitrogen deposition, whereas, agriculture is the dominating emission sector
contributing to reduced nitrogen deposition.
9.4 Conclusions
Atmospheric nitrogen deposition to the Baltic Sea basin has been calculated with
the EMEP/MSC-W model for each year of the period 1995–2015. Compared to
1995 there is clear reduction of oxidized nitrogen deposition in the year 2015, both
in annual (−33%) and normalized deposition (−35%). The situation is different in
case of reduced nitrogen deposition. However, the normalised deposition is declining
(12%) in 2014 compared to 1995 deposition, the annual deposition is 5% higher in
2014 than in 1995. Also, uncertainty related to variable meteorology is higher for
reduced nitrogen deposition than for oxidized nitrogen deposition.
Germany and Poland are the main sources contributing to oxidized nitrogen deposition to the Baltic Sea basin with 23.4 kt N and 17.8 kt N, respectively. This correspond to 17.9% and 13.6% contribution, respectively. There is also a significant
contribution from the ship traffic on the Baltic Sea (15.2 kt N) and North Sea (10.3
kt N), corresponding to 11.6% and 7.8%, respectively.
In case of reduced nitrogen deposition to the Baltic Sea basin, Germany dominates
the list with 31.2 kt N corresponding to 28.8% contribution to annual deposition in
2014. Three other HELCOM countries follow Germany on the list: Poland, Denmark
and Sweden with 15.7 kt N, 10.9 kt N and 7.6 kt N, respectively corresponding to
14.5%. 10.1% and 7.0% contribution.