Jamboree, October 19-22, 2015, Oostende, Belgium Nutrients in the Danish part of the North Sea EMODnet Chemistry Martin M. Larsen & Jonas K. Rømer, Aarhus

Jamboree, October 19-22, 2015, Oostende, Belgium

Nutrients in the Danish part of the North Sea

EMODnet Chemistry

Martin M. Larsen & Jonas K. Rømer, Aarhus University

Jamboree, October 21, 2015, Oostende, Belgium

Example for NOx:

Current status


Why is time trends and patterns interesting?

Drivers for nutrients

• The south-east area of the North Sea is generally eutrophic• In Denmark, the eutrophication was first really accepted as a

major problem in the 1980’ies, resulting in the first National Action Plan for the Aquatic Environment in 1987

• A recent Holistic assessment have just been published online 09 May, 2015 (Open access):

• Recovery of Danish Coastal Ecosystems after reduction of Nutrient Loading: A holistic ecosystem approach (Riemann et al, Estuaries and Coast)

• Some of the data in this gives a better understanding of the drivers for nutrient concentrations in the North Sea in general


Situation in 1987

Danish starting point

• Increasing nutrient loads from agriculture, industry and urban area development from the 1950ies to 1980ies

• Increased algea, loss of seagrass habitats and anoxia events (especially in 1985) caused political action

• The first National Action Plan for the Aquatic Environment (APEA) 1987 focused on:

• Agriculture (mainly N-reduction)• Urban waste water treatment plants (mainly P-reduction)• Industries with seperate discharges

• Several following APEAs was focused on N-reductions, incrementally decreasing the N input to the Aquatic Environment

• Some graphs to indicate the rate of reduction in discharges…


Stations examined by Riemann et al (2015)

Reduction through APEAs


Nutrient release from 1980 to 2013 (Riemann et al 2015)


• Point sources data averaged for 1981-89 due to lack of information

• Point sources: TN reduced by 75%, TP by >90% from 1980ies to present

• Diffuse sources mainly N-reduction to around 43% in 2013 (scaled from 5 large catchment areas)

• TN ~100.000 to 55.000 ton/year (13.000)• TP ~10.000 to 2.400 ton/year (730)


Concentration trends (Riemann et al 2015)



Pressures (Riemann et al 2015)



Indicators (Riemann et al 2015)



Why do we need EMODnet?

Where does EMODnet fit in?

• ”The use of conceptual and numerical models to test recovery and restoration scenarios as well as legislative frameworks focusing on specific targets, measures and tolerable deviations often lack information from empirical data for validation” Rieman et al. 2015

• EMODnet adds direct access to all european empirical data, and also establishes the possibility to see changes in 3D by DIVA interpolation of these data (2D maps over three decades)

• This makes it possible to visually check the development of the real (not only model) environment drawing data from most (all) European data-sources


EMODnet NO3 data

1985 1990

20092005


NOx winter concentrations (before harmonisation)

3D animation


PO4 winter concentrations (before harmonisation)

3D animation


SiO winter concentrations (before harmonisation)

3D animation

• DIVA interpolation ready to use on website• NO3, PO4, SiO (NH4?)

• DIVA interpolations prepared and ready to upload• NOx, (NH4?)

• DIVA interpolations ready to be performed• TP, TN, NO2

• Data not ready for DIVA interpolation (missing data, mainly data available in the Baltic Sea-region)

• O2, Chlorophyll


Status Nutrients North Sea


Source

Estuaries and CoastsDOI 10.1007/s12237-015-9980-0 (published online 09 May 2015 as Open Access)

Recovery of Danish Coastal Ecosystems After Reductions in Nutrient Loading: A Holistic Ecosystem Approach Bo Riemann1, Jacob Carstensen1, Karsten Dahl1, Henrik Fossing2, Jens W. Hansen2, Hans H. Jakobsen1, Alf B. Josefson1, Dorte Krause-Jensen2, Stiig Markager1,Peter A. Stæhr1, Karen Timmermann1, Jørgen Windolf2 and Jesper H. Andersen3

Bo Riemann [email protected]

1 Department of Bioscience, Aarhus University, Frederiksborgvej 399, 4000 Roskilde, Denmark 2 Department of Bioscience, Aarhus University, Vejlsøvej 25, 8600 Silkeborg, Denmark 3 NIVA Denmark Water Research, Ørestads Boulevard 73, 2300 Copenhagen S, Denmark


BREAKING NEWS

Biological ReviewsDOI: 10.1111/brv.12221 (published online 14 October 2015 as Open Access)

Long-term temporal and spatial trends in eutrophication status of the Baltic SeaJesper H. Andersen1,2,3,*, Jacob Carstensen2,4, Daniel J. Conley5, Karsten Dromph2,4,6, Vivi Fleming-Lehtinen3,7, Bo G. Gustafsson8, Alf B. Josefson4, Alf Norkko3,9, Anna Villnäs9 and Ciarán Murray4

[email protected])

1 NIVA Denmark Water Research, Ørestads Boulevard 73, 2300 Copenhagen S, Denmark2 Baltic Nest Institute, Aarhus University, Frederiksborgvej 399, 4000 Roskilde, Denmark3 Marine Research Centre, Finnish Environment Institute, Mechelininkatu 34A, 00251 Helsinki, Finland 4 Department of Bioscience, Aarhus University, Frederiksborgvej 399, 4000 Roskilde, Denmark5 Department of Geology, Geobiosphere Science Centre, Lund University, Sölvesgatan 12, 22362 Lund, Sweden 6 Lundbeck Pharma, Ottilavej 9, 2500 Valby, Denmark7 HELCOM Secretariat, Katajanokanlaituri 6B, 00160 Helsinki, Finland8 Baltic Nest Institute, Baltic Sea Centre, Stockholm University, Svante Arrhenius väg 21A, 10691 Stockholm, Sweden 9 Tvärminne Zoological Station, University of Helsinki, JA Palmenin tie 260, 10900 Hanko, Finland

Documents

Jamboree, October 19-22, 2015, Oostende, Belgium Nutrients in the Danish part of the North Sea EMODnet Chemistry Martin M. Larsen & Jonas K. Rømer, Aarhus