Abstract
The result of recent measurements of the total alkalinity and calcium in the Baltic Sea are presented. The 1986 investigation gives a significantly different calcium to total alkalinity ratio (0.691) compared to literature values (0.41). Explanations for the difference in calcium to total alkalinity ratio are offered, based on reactions in the drainage basins including decay of organic matter, precipitation of acid rain and dissolution of carbonate minerals. From later investigations a more reasonable explanation seems that the shift is due to chemical patchiness in the Baltic proper. In spite of the acidic precipitation and the increased partial pressure of carbon dioxide in the atmosphere it seems that the carbonate system has not changed dramatically during the century. Existing fluctuations are mainly depending on the season and the inflow of dense water from the Kattegat/North Sea. A carbonate model has been coupled to a one-dimensional physical and biogeochemical model of the Baltic proper. The considered regulating mechanisms have been the atmospheric carbon dioxide pressure, the river run-off concentration of total alkalinity and total carbonate, and the total alkalinity in the precipitation. With the present concentrations of the above regulating mechanisms the uptake of atmospheric carbon dioxide by the Baltic proper
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Citation Formats
Ohlson, Mats.
On the carbonate systems in the Baltic and Weddell Seas: Inventories and influences by man.
Sweden: N. p.,
1991.
Web.
Ohlson, Mats.
On the carbonate systems in the Baltic and Weddell Seas: Inventories and influences by man.
Sweden.
Ohlson, Mats.
1991.
"On the carbonate systems in the Baltic and Weddell Seas: Inventories and influences by man."
Sweden.
@misc{etde_10141777,
title = {On the carbonate systems in the Baltic and Weddell Seas: Inventories and influences by man}
author = {Ohlson, Mats}
abstractNote = {The result of recent measurements of the total alkalinity and calcium in the Baltic Sea are presented. The 1986 investigation gives a significantly different calcium to total alkalinity ratio (0.691) compared to literature values (0.41). Explanations for the difference in calcium to total alkalinity ratio are offered, based on reactions in the drainage basins including decay of organic matter, precipitation of acid rain and dissolution of carbonate minerals. From later investigations a more reasonable explanation seems that the shift is due to chemical patchiness in the Baltic proper. In spite of the acidic precipitation and the increased partial pressure of carbon dioxide in the atmosphere it seems that the carbonate system has not changed dramatically during the century. Existing fluctuations are mainly depending on the season and the inflow of dense water from the Kattegat/North Sea. A carbonate model has been coupled to a one-dimensional physical and biogeochemical model of the Baltic proper. The considered regulating mechanisms have been the atmospheric carbon dioxide pressure, the river run-off concentration of total alkalinity and total carbonate, and the total alkalinity in the precipitation. With the present concentrations of the above regulating mechanisms the uptake of atmospheric carbon dioxide by the Baltic proper gets about 12 g C/m{sup 2}/year and the net sedimentation gets about 8 g C/m{sup 2}/year. Total carbonate dat from the southern Weddell Sea, collected during the Swedish Antarctic Expedition in 1988-1989, have been investigated with respect to the contribution of anthropogenic carbon dioxide. The anthropogenic carbon dioxide mean concentration varies in the different water masses from about 36 {mu}mol/kg in the Ice Shelf water to 8 {mu}mol/kg in the Antarctic bottom water. The evaluated annual transport of anthropogenic carbon amounts to 8x10{sup 12} g for this special area. 28 refs., 8 figs.}
place = {Sweden}
year = {1991}
month = {Sep}
}
title = {On the carbonate systems in the Baltic and Weddell Seas: Inventories and influences by man}
author = {Ohlson, Mats}
abstractNote = {The result of recent measurements of the total alkalinity and calcium in the Baltic Sea are presented. The 1986 investigation gives a significantly different calcium to total alkalinity ratio (0.691) compared to literature values (0.41). Explanations for the difference in calcium to total alkalinity ratio are offered, based on reactions in the drainage basins including decay of organic matter, precipitation of acid rain and dissolution of carbonate minerals. From later investigations a more reasonable explanation seems that the shift is due to chemical patchiness in the Baltic proper. In spite of the acidic precipitation and the increased partial pressure of carbon dioxide in the atmosphere it seems that the carbonate system has not changed dramatically during the century. Existing fluctuations are mainly depending on the season and the inflow of dense water from the Kattegat/North Sea. A carbonate model has been coupled to a one-dimensional physical and biogeochemical model of the Baltic proper. The considered regulating mechanisms have been the atmospheric carbon dioxide pressure, the river run-off concentration of total alkalinity and total carbonate, and the total alkalinity in the precipitation. With the present concentrations of the above regulating mechanisms the uptake of atmospheric carbon dioxide by the Baltic proper gets about 12 g C/m{sup 2}/year and the net sedimentation gets about 8 g C/m{sup 2}/year. Total carbonate dat from the southern Weddell Sea, collected during the Swedish Antarctic Expedition in 1988-1989, have been investigated with respect to the contribution of anthropogenic carbon dioxide. The anthropogenic carbon dioxide mean concentration varies in the different water masses from about 36 {mu}mol/kg in the Ice Shelf water to 8 {mu}mol/kg in the Antarctic bottom water. The evaluated annual transport of anthropogenic carbon amounts to 8x10{sup 12} g for this special area. 28 refs., 8 figs.}
place = {Sweden}
year = {1991}
month = {Sep}
}