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- Davies, Peter A., et al.
(författare)
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The interaction between topography and a nonlinearly stratified rotating fluid
- 1982
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Ingår i: Physics of fluids. - : AIP Publishing. - 1070-6631 .- 1089-7666 .- 0031-9171. ; 25:11, s. 1931-1934
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Tidskriftsartikel (refereegranskat)abstract
- Laboratory experiments have been conducted in which a spherical solid obstacle has been towed steadily through a thermally stratified rotating fluid in order to determine the effects of the density‐profile shape upon the attenuation with height of the disturbance produced by the obstacle. The existence of a cutoff level in the fluid beyond which the disturbance is not detected is illustrated, and the dependence of this level upon local variations in density profile is studied. Measurements of velocity above and behind the obstacle are reported.
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| 7. |
- Humborg, C., et al.
(författare)
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Silicon retention in river basins : Far-reaching effects on biogeochemistry and aquatic food webs in coastal marine environments
- 2000
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Ingår i: Ambio. - 0044-7447 .- 1654-7209. ; 29:1, s. 45-50
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Tidskriftsartikel (refereegranskat)abstract
- Regulation of rivers by damming as well as eutrophication in river basins has substantially reduced dissolved silicon (DSi) loads to the Black Sea and the Baltic Sea. Whereas removal of N and P in lakes and reservoirs can be compensated for by anthropogenic inputs in the drainage basins, no such compensation occurs for DSi. The resulting changes in the nutrient composition (DSi:N:P ratio) of river discharges seem to be responsible for dramatic shifts in phytoplankton species composition in the Black Sea. In the Baltic Sea, DSi concentrations and the DSi:N ratio have been decreasing since the end of the 1960s, and there are indications that the proportion of diatoms in the spring bloom has decreased while flagellates have increased. The effects on coastal biogeochemical cycles and food web structure observed in the Black Sea and the Baltic Sea may be far reaching, because it appears that the reductions in DSi delivery by rivers are probably occurring worldwide with the ever increasing construction of dams for flow regulation.
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| 9. |
- Wulff, F., et al.
(författare)
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A nutrient budget model of the Baltic Sea.
- 2001
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Ingår i: A systems analysis of the Baltic Sea. - Heidelberg : Springer. - 3540677690 - 9783540677697 ; , s. 353-372
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Bokkapitel (övrigt vetenskapligt/konstnärligt)abstract
- During recent decades, large-scale effects of pollution on marine estuaries and even entire enclosed coastal seas have become apparent. One of the first regions where this was observed is the Baltic Sea, whereby the appearance of anoxic deep basins, extensive algal blooms and elimination of top predators like eagles and seals indicated effects of both increased nutrient inputs and toxic substances.This book describes the physical, biochemical and ecological processes that govern inputs, distribution and ecological effects of nutrients and toxic substances in the Baltic Sea. Extensive reviews are supplemented by budgets and dynamic simulation models.This book is highly interdisciplinary and uses a systems approach for analyzing and describing a marine ecosystem. It gives an overview of the Baltic Sea, but is useful for any marine scientist studying large marine ecosystems.
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