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Mathematical model may result in better environment measures for the Baltic
Date:10/22/2010

can be linked to changes in climate and to what extent the increased input of nutrients has influenced the situation."

Model results show that natural variations in climate are of great significance for the oxygen status of the deep water of the Baltic Sea over a time scale of decades. On the other hand, no clear effect can be observed over longer time scales. The marked deterioration in oxygen conditions in the deep water during the 20th century is instead largely due to our inputs of nutrients to the sea.

In addition to the physical, chemical and biological processes which are crucial among other things for the plankton dynamics of the area, Gustafsson has included the marine carbon system in his model.

"This means that it is now possible to calculate long-term variations in acidity in the sea. My model thus makes it possible to compare future positive effects of reduced nutrient inputs to the damping effect of eutrophication on acidification. This is an important issue, as the level of carbon dioxide in the atmosphere is expected to increase during the 21st century, and a sharply lowered pH may be of crucial significance to the ecosystem," says Gustafsson.


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Contact: Erik Gustafsson
erikg@gvc.gu.se
46-031-786-2877
University of Gothenburg
Source:Eurekalert  

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