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Environmental Impacts-Marine Biogeochemistry
SMHI, Forskningsavdelningen, Oceanografi.ORCID-id: 0000-0001-7413-7497
Vise andre og tillknytning
2015 (engelsk)Kapittel i bok, del av antologi (Annet vitenskapelig)
Resurstyp
Text
Abstract [en]

Marine biogeochemistry deals with the budgets and transformations of biogeochemically reactive elements such as carbon, nitrogen and phosphorus. Inorganic nitrogen and phosphorus compounds are the major nutrients and control organic matter (biomass) production in the surface water. Due to various anthropogenic activities, the input of these nutrients into the Baltic Sea has increased drastically during the last century and has enhanced the net organic matter production by a factor of 2-4 (eutrophication). This has led to detrimental oxygen depletion and hydrogen sulphide production in the deep basins of the Baltic Sea. Model simulations based on the Baltic Sea Action Plan (BSAP) indicate that current eutrophication and thus extension of oxygen-depleted areas cannot be reversed within the next hundred years by the proposed nutrient reduction measures. Another environmental problem is related to decreasing pH (acidification) that is caused by dissolution of the rising atmospheric CO2. Estimates indicate a decrease in pH by about 0.15 during the last 1-2 centuries, and continuation of this trend may have serious ecological consequences. However, the concurrent increase in the alkalinity of the Baltic Sea may have significantly counteracted acidification.

sted, utgiver, år, opplag, sider
2015. s. 337-361
Serie
SECOND ASSESSMENT OF CLIMATE CHANGE FOR THE BALTIC SEA BASIN
HSV kategori
Forskningsprogram
Klimat
Identifikatorer
URN: urn:nbn:se:smhi:diva-2044DOI: 10.1007/978-3-319-16006-1_18ISI: 000367908100023OAI: oai:DiVA.org:smhi-2044DiVA, id: diva2:925462
Tilgjengelig fra: 2016-05-02 Laget: 2016-05-02 Sist oppdatert: 2016-05-02bibliografisk kontrollert

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