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Eutrophication status of the North Sea, Skagerrak, Kattegat and the Baltic Sea in present and future climates: A model study
SMHI, Research Department, Oceanography.ORCID iD: 0000-0001-7413-7497
SMHI, Research Department, Oceanography.ORCID iD: 0000-0003-1068-746X
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2014 (English)In: Journal of Marine Systems, ISSN 0924-7963, Vol. 132, 174-184 p.Article in journal (Refereed) Published
Abstract [en]

A method to combine observations and an ensemble of ecological models has been used to assess eutrophication. Using downscaled forcing from two GCMs under the A1B emission scenario, an assessment of the eutrophication status was made for a control (19702000) and a future climate (20702100) period. By using validation results from a hindcast to compute individual weights between the models, an assessment of eutrophication is done using a set of threshold values. The final classification distinguishes between three categories: problem area, potential problem area, and non-problem area, in accordance with current management practice as suggested by the Oslo and Paris Commissions (OSPAR) and the Helsinki Commission (HELCOM). For the control run the assessment indicates that the Kattegat, the Danish Straits, the Gulf of Finland, the Gotland Basin as well as main parts of the Arkona Basin, the Bornholm Basin, and the Baltic proper may be classified as problem areas. The main part of the North Sea and also the Skagerrak are non-problem areas while the main parts of the Gulf of Bothnia, Gulf of Riga and the entire southeastern continental coast of the North Sea may be classified as potential problem areas. In the future climate scenarios most of the previous potential problem areas in the Baltic Sea have become problem areas, except for the Bothnian Bay where the situation remain fairly unchanged. In the North Sea there seems to be no obvious changes in eutrophication status in the projected future climate.

Place, publisher, year, edition, pages
2014. Vol. 132, 174-184 p.
Keyword [en]
Eutrophication, Ecological model, Baltic Sea, North Sea
National Category
Oceanography, Hydrology, Water Resources
Research subject
Oceanography
Identifiers
URN: urn:nbn:se:smhi:diva-119DOI: 10.1016/j.jmarsys.2014.02.004ISI: 000334141400015OAI: oai:DiVA.org:smhi-119DiVA: diva2:802669
Available from: 2015-04-13 Created: 2015-03-26 Last updated: 2015-04-13Bibliographically approved

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Citation style
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