Fredrik Wulff - Academia.edu (original) (raw)
Papers by Fredrik Wulff
Estuarine, Coastal and Shelf Science, 1997
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Biological, Physical and Geochemical Features of Enclosed and Semi-enclosed Marine Systems, 1999
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ABSTRACT Skärgård, ISSN 0356-9381, vol. 1, 67-87
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Vatten, ISSN 0042-2886, vol. 50, nr. 3, 220-230 Based on the intensive hydrochemical measurements... more Vatten, ISSN 0042-2886, vol. 50, nr. 3, 220-230 Based on the intensive hydrochemical measurements during the Gulf of Bothnia Year 1991, we present descriptions of the regional variations of freshwater and nutrient inputs and hydrographic and nutrient conditions in the basins for this particular year. These data are then used to construct budgets of silicate, inorganic and organic nitrogen and phosphorus for the Bothnian Sea and Bay. The variations of internal sources and sinks and advective transports between the basins and with the Baltic proper show the relative importance and magnitude of biogeochemical and physical processes for the development of nutrient concentrations in these basins. Annual budget estimates show that the Bothnian Sea appears to function as a very efficient sink for nitrogen. There is a very small exchange of nitrogen with the Baltic proper, in contrast to the large amounts of phosphorus imported and silica exported. Overall N/P ratios show the high rates typ...
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We are using the coupled models of decision support system NEST, to evaluate the response of the ... more We are using the coupled models of decision support system NEST, to evaluate the response of the marine ecosystem to changes in external loads through various management options. The models address all the seven major marine basins and the entire drainage basin. A series of future scenarios have been developed, in close collaboration with HELCOM, to see the possible effects
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Journal of Marine Research, 1987
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Marine Environmental Research, 1988
... Variations of nitrogen, phosphorus and silicate in the Baltic 25 central station in the easte... more ... Variations of nitrogen, phosphorus and silicate in the Baltic 25 central station in the eastern Gothland Basin may well describe the average conditions. RESULTS In order to describe typicalseasonal and spatial distribution patterns, the interpolated monthly surface (0-5 m) mean ...
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Marine Ecology Progress Series, 1990
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Marine Ecology Progress Series, 1996
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Netherlands Journal of Sea Research, 1992
ABSTRACT A diagnostic advection-diffusion equation system in a ‘natural coordinate’ frame of refe... more ABSTRACT A diagnostic advection-diffusion equation system in a ‘natural coordinate’ frame of reference is investigated in order to improved its robustness. The dependence of the leading-order solutions on higher-order features of the hydrographic data has been decreased and a differential equation with and analytical solution is obtained. The properties of the lowest-order equation are compared with previous studies where the undegenerated equations were used to estimate the distribution of both the diapycnal salt flux and the oxygen consumption within the Baltic proper. The agreement found is within the acceptable bounds. Finally a pilot study of a silicate budget of the Baltic proper has been performed.
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Journal of Marine Systems, 2000
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Journal of Marine Systems, 2000
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Journal of Marine Systems, 2008
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Journal of Environmental Management, 1997
The environmental conditions of the Baltic Sea have been of concern for approximately the last th... more The environmental conditions of the Baltic Sea have been of concern for approximately the last three decades. In spite of this concern, the Sea is far from being in good ecological condition. One important reason may be the lack of an overview of costs and benefits associated with the pollution reductions needed for the restoration of the Sea. The purpose
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Hydrobiologia, 2009
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Global Biogeochemical Cycles, 1989
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Estuarine, Coastal and Shelf Science, 1997
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Estuarine, Coastal and Shelf Science, 1989
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Environmetrics, 1991
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Estuarine, Coastal and Shelf Science, 1997
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Biological, Physical and Geochemical Features of Enclosed and Semi-enclosed Marine Systems, 1999
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ABSTRACT Skärgård, ISSN 0356-9381, vol. 1, 67-87
Bookmarks Related papers MentionsView impact
Vatten, ISSN 0042-2886, vol. 50, nr. 3, 220-230 Based on the intensive hydrochemical measurements... more Vatten, ISSN 0042-2886, vol. 50, nr. 3, 220-230 Based on the intensive hydrochemical measurements during the Gulf of Bothnia Year 1991, we present descriptions of the regional variations of freshwater and nutrient inputs and hydrographic and nutrient conditions in the basins for this particular year. These data are then used to construct budgets of silicate, inorganic and organic nitrogen and phosphorus for the Bothnian Sea and Bay. The variations of internal sources and sinks and advective transports between the basins and with the Baltic proper show the relative importance and magnitude of biogeochemical and physical processes for the development of nutrient concentrations in these basins. Annual budget estimates show that the Bothnian Sea appears to function as a very efficient sink for nitrogen. There is a very small exchange of nitrogen with the Baltic proper, in contrast to the large amounts of phosphorus imported and silica exported. Overall N/P ratios show the high rates typ...
Bookmarks Related papers MentionsView impact
We are using the coupled models of decision support system NEST, to evaluate the response of the ... more We are using the coupled models of decision support system NEST, to evaluate the response of the marine ecosystem to changes in external loads through various management options. The models address all the seven major marine basins and the entire drainage basin. A series of future scenarios have been developed, in close collaboration with HELCOM, to see the possible effects
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Journal of Marine Research, 1987
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Marine Environmental Research, 1988
... Variations of nitrogen, phosphorus and silicate in the Baltic 25 central station in the easte... more ... Variations of nitrogen, phosphorus and silicate in the Baltic 25 central station in the eastern Gothland Basin may well describe the average conditions. RESULTS In order to describe typicalseasonal and spatial distribution patterns, the interpolated monthly surface (0-5 m) mean ...
Bookmarks Related papers MentionsView impact
Marine Ecology Progress Series, 1990
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Marine Ecology Progress Series, 1996
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Netherlands Journal of Sea Research, 1992
ABSTRACT A diagnostic advection-diffusion equation system in a ‘natural coordinate’ frame of refe... more ABSTRACT A diagnostic advection-diffusion equation system in a ‘natural coordinate’ frame of reference is investigated in order to improved its robustness. The dependence of the leading-order solutions on higher-order features of the hydrographic data has been decreased and a differential equation with and analytical solution is obtained. The properties of the lowest-order equation are compared with previous studies where the undegenerated equations were used to estimate the distribution of both the diapycnal salt flux and the oxygen consumption within the Baltic proper. The agreement found is within the acceptable bounds. Finally a pilot study of a silicate budget of the Baltic proper has been performed.
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Journal of Marine Systems, 2000
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Journal of Marine Systems, 2000
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Journal of Marine Systems, 2008
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Journal of Environmental Management, 1997
The environmental conditions of the Baltic Sea have been of concern for approximately the last th... more The environmental conditions of the Baltic Sea have been of concern for approximately the last three decades. In spite of this concern, the Sea is far from being in good ecological condition. One important reason may be the lack of an overview of costs and benefits associated with the pollution reductions needed for the restoration of the Sea. The purpose
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Hydrobiologia, 2009
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Global Biogeochemical Cycles, 1989
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Estuarine, Coastal and Shelf Science, 1997
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Estuarine, Coastal and Shelf Science, 1989
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Environmetrics, 1991
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