FN Archimer Export Format
PT J
TI Deriving pre-eutrophic conditions from an ensemble model approach for the North-West European seas
BT 
AF van Leeuwen, Sonja M.
   Lenhart, Hermann-J.
   Prins, Theo C.
   Blauw, Anouk
   Desmit, Xavier
   Fernand, Liam
   Friedland, Rene
   Kerimoglu, Onur
   Lacroix, Genevieve
   van der Linden, Annelotte
   Lefebvre, Alain
   van der Molen, Johan
   Plus, Martin
   Ruvalcaba Baroni, Itzel
   Silva, Tiago
   Stegert, Christoph
   Troost, Tineke A.
   Vilmin, Lauriane
AS 1:1;2:2;3:3;4:3;5:4;6:5;7:6,7;8:8;9:4;10:3;11:9;12:1;13:9;14:10;15:5;16:11,12;17:3;18:3;
FF 1:;2:;3:;4:;5:;6:;7:;8:;9:;10:;11:PDG-ODE-LITTORAL-LERBL;12:;13:PDG-ODE-DYNECO-PELAGOS;14:;15:;16:;17:;18:;
C1 Department of Coastal Systems, Netherlands Institute for Sea Research (NIOZ), Texel, Netherlands
   Department of Informatiks, Scientific Computing Group, Hamburg University, Hamburg, Germany
   Department of Marine and Coastal Systems, Deltares, Delft, Netherlands
   Operational Directorate Natural Environment, Royal Belgian Institute for Natural Sciences (RBINS), Brussels, Belgium
   Centre for Environment, Fisheries and Aquaculture Science (Cefas), Lowestoft, United Kingdom
   Joint Research Centre, Directorate D – Sustainable Resources, Ispra, Italy
   Physical Oceanography and Instrumentation, Leibniz Institute for Baltic Sea Research Warnemünde, Rostock, Germany
   Institute for Chemistry and Biology of the Marine Environment (ICBM), Carl von Ossietzky University of Oldenburg, Oldenburg, Germany
   DYNECO-PELAGOS Laboratory, Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER), Plouzané, France
   Department of Research and Development, Oceanography, Swedish Meteorological and Hydrological Institute, Norrköping, Sweden
   Institute of Coastal Systems: Analysis and Modelling, Helmholtz-Zentrum Hereon, Geesthacht, Germany
   Operational Modelling Group, Bundesamt für Seeschifffahrt und Hydrographie, Hamburg, Germany
C2 NIOZ, NETHERLANDS
   UNIV HAMBURG, GERMANY
   DELTARES, NETHERLANDS
   ROYAL BELGIAN INST NAT SCI, BELGIUM
   CEFAS, UK
   JRC, ITALY
   LEIBNIZ INST BALT SEA RES (IOW), GERMANY
   UNIV OLDENBURG, GERMANY
   IFREMER, FRANCE
   SMHI, SWEDEN
   HZG, GERMANY
   BSH, GERMANY
SI BOULOGNE
   BREST
SE PDG-ODE-LITTORAL-LERBL
   PDG-ODE-DYNECO-PELAGOS
IN WOS Ifremer UPR
   DOAJ
   copubli-europe
IF 3.7
TC 3
UR https://archimer.ifremer.fr/doc/00836/94836/102388.pdf
   https://archimer.ifremer.fr/doc/00836/94836/102389.pdf
LA English
DT Article
DE ;eutrophication;North Sea;OSPAR ICG-EMO;DIN;DIP;nutrients;chlorophyll;ecosystem modelling
AB The pre-eutrophic state of marine waters is generally not well known, complicating target setting for management measures to combat eutrophication. We present results from an OSPAR ICG-EMO model assessment to simulate the pre-eutrophic state of North-East Atlantic marine waters. Using an ecosystem model ensemble combined with an observation-based weighting method we derive sophisticated estimates for key eutrophication indicators. Eight modelling centres applied the same riverine nutrient loads, atmospheric nutrient deposition rates and boundary conditions to their specific model set-up to ensure comparability. The pre-eutrophic state was defined as a historic scenario of estimated nutrient inputs (riverine, atmospheric) at around the year 1900, before the invention and widespread use of industrial fertilizers. The period 2009-2014 was used by all participants to simulate both the current state of eutrophication and the pre-eutrophic scenario, to ensure that differences are solely due to the changes in nutrient inputs between the scenarios. Mean values were reported for winter dissolved inorganic nutrients and total nutrients (nitrogen, phosphorus) and the nitrogen to phosphorus ratio, and for growing season chlorophyll, chlorophyll 90th percentile, near-bed oxygen minimum and net phytoplankton production on the level of the OSPAR assessment areas. Results showed distinctly lower nutrient concentrations and nitrogen to phosphorus ratio’s in coastal areas under pre-eutrophic conditions compared to current conditions (except in the Meuse Plume and Seine Plume areas). Chlorophyll concentrations were estimated to be as much as ~40% lower in some areas, as were dissolved inorganic phosphorus levels. Dissolved inorganic nitrogen levels were found to be up to 60% lower in certain assessment areas. The weighted average approach reduced model disparities, and delivered pre-eutrophic concentrations in each assessment area. Our results open the possibility to establish reference values for indicators of eutrophication across marine regions. The use of the new assessment areas ensures local ecosystem functioning is better represented while political boundaries are largely ignored. As such, the reference values are less associated to member states boundaries than to ecosystem boundaries. 
PY 2023
PD MAY
SO Frontiers In Marine Science
SN 2296-7745
PU Frontiers Media SA
VL 10
UT 000995911600001
DI 10.3389/fmars.2023.1129951
ID 94836
ER

EF