Future changes in the Baltic Sea acid-base (pH) and oxygen balances

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Future changes in the Baltic Sea acid-base (pH) and oxygen balances

Omstedt, Anders, 1949 (author): Gothenburg University,Göteborgs universitet,Institutionen för geovetenskaper,Department of Earth Sciences,Department of Earth Sciences, Univerity of Gothenburg

Edman, Moa (author): Gothenburg University,Göteborgs universitet,Institutionen för geovetenskaper,Department of Earth Sciences,Department of Earth Sciences, Univerity of Gothenburg

Clamer, Björn (author)

Frodin, Peter (author): Lund University,Lunds universitet,Institutionen för naturgeografi och ekosystemvetenskap,Naturvetenskapliga fakulteten,Dept of Physical Geography and Ecosystem Science,Faculty of Science,Department of Physical Geography and Ecosystem Science, Lund University

Gustafsson, Erik, 1977 (author): Stockholms universitet,Baltic Nest Institute,Baltic Nest Institute, Stockholm University

Humborg, Christoph (author): Stockholms universitet,Baltic Nest Institute,Baltic Nest Institute, Stockholm University

Hägg, Hanna (author): Stockholms universitet,Baltic Nest Institute,Baltic Nest Institute, Stockholm University

Mörth, Magnus (author): Stockholms universitet,Baltic Nest Institute,Baltic Nest Institute, Stockholm University

Rutgersson, Anna, 1971- (author): Uppsala universitet,Luft-, vatten- och landskapslära,AWEP

Schurgers, Guy (author): Lund University,Lunds universitet,Institutionen för naturgeografi och ekosystemvetenskap,Naturvetenskapliga fakulteten,Dept of Physical Geography and Ecosystem Science,Faculty of Science,Department of Physical Geography and Ecosystem Science, Lund University

Smith, Benjamin (author): Lund University,Lunds universitet,Institutionen för naturgeografi och ekosystemvetenskap,Naturvetenskapliga fakulteten,Dept of Physical Geography and Ecosystem Science,Faculty of Science,Department of Physical Geography and Ecosystem Science, Lund University

Wällstedt, Teresia (author): Stockholms universitet,Baltic Nest Institute,Baltic Nest Institute, Stockholm University

Yurova, Alla (author): Hydrometeorological Centre of Russia, Moscow, Russia

Claremar, Björn, 1980- (author): Uppsala universitet,Luft-, vatten- och landskapslära,AWEP

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(creator_code:org_t)

2012-01-01
2012
English.
In: Tellus. Series B, Chemical and physical meteorology. - : Stockholm University Press. - 0280-6509 .- 1600-0889. ; 64

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Journal article (peer-reviewed)

Abstract Subject headings

Possible future changes in Baltic Sea acid–base (pH) and oxygen balances were studied using a catchment–sea coupled model system and numerical experiments based on meteorological and hydrological forcing datasets and scenarios. By using objective statistical methods, climate runs for present climate conditions were examined and evaluated using Baltic Sea modelling. The results indicate that increased nutrient loads will not inhibit future Baltic Sea acidification; instead, the seasonal pH cycle will be amplified by increased biological production and mineralization. All examined scenarios indicate future acidification of the whole Baltic Sea that is insensitive to the chosen global climate model. The main factor controlling the direction and magnitude of future pH changes is atmospheric CO2 concentration (i.e. emissions). Climate change and land-derived changes (e.g. nutrient loads) affect acidification mainly by altering the seasonal cycle and deep-water conditions. Apart from decreasing pH, we also project a decreased saturation state of calcium carbonate, decreased respiration index, and increasing hypoxic area – all factors that will threaten the marine ecosystem. We demonstrate that substantial reductions in fossil-fuel burning are needed to minimize the coming pH decrease and substantial reductions in nutrient loads are needed to reduce the coming increase in hypoxic and anoxic waters.

Subject headings

NATURVETENSKAP -- Kemi (hsv//swe)
NATURAL SCIENCES -- Chemical Sciences (hsv//eng)
NATURVETENSKAP -- Geovetenskap och miljövetenskap (hsv//swe)
NATURAL SCIENCES -- Earth and Related Environmental Sciences (hsv//eng)
NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Naturgeografi (hsv//swe)
NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Physical Geography (hsv//eng)
NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Meteorologi och atmosfärforskning (hsv//swe)
NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Meteorology and Atmospheric Sciences (hsv//eng)
NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Oceanografi, hydrologi och vattenresurser (hsv//swe)
NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Oceanography, Hydrology and Water Resources (hsv//eng)

Keyword

Ocean acidification
marine acidification
eutrophication
climate change
Baltic Sea
Kattegat
Ocean acidification

Publication and Content Type

ref (subject category)
art (subject category)

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By the author/editor: Omstedt, Anders, ...; Edman, Moa; Clamer, Björn; Frodin, Peter; Gustafsson, Erik ...; Humborg, Christo ...; show more...; Hägg, Hanna; Mörth, Magnus; Rutgersson, Anna ...; Schurgers, Guy; Smith, Benjamin; Wällstedt, Teres ...; Yurova, Alla; Claremar, Björn, ...; show less...

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NATURAL SCIENCES: NATURAL SCIENCES; and Chemical Science ...

NATURAL SCIENCES: NATURAL SCIENCES; and Earth and Relate ...

NATURAL SCIENCES: NATURAL SCIENCES; and Earth and Relate ...; and Physical Geograp ...

NATURAL SCIENCES: NATURAL SCIENCES; and Earth and Relate ...; and Meteorology and ...

NATURAL SCIENCES: NATURAL SCIENCES; and Earth and Relate ...; and Oceanography Hyd ...

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By the university: University of Gothenburg; Lund University; Stockholm University; Uppsala University

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