Data/hora: 15/06/2024 02:55:43

Provedor de dados: | 5
País: | France
Título: | Changes in hydrography and suspended particulate matter during a barotropic forced inflow
Autores: | Lund-hansen, Lc; Skyum, P.
Data: | 1992
Ano: | 1992
Resumo: | This paper describes the changes in hydrography and the vertical distribution of suspended particulate matter (SPM) that occur during an inflow of highly saline water into a semi-enclosed bay. The study area is situated near the frontal zone in the Kattegat between the highly saline waters (32-34) of the North Sea/Skagerrak and the less saline waters (15-20) of the Baltic Sea. The water column at the frontal zone is stratified throughout much of the year. The study was carried out in a bay in the southwestern part of the Kattegat, and is based on CTD-observations, current direction and speed, and samples of suspended particulate matter obtained during the study period. The study shows that the hydrography of the bay is strongly influenced by the inflow from the Kattegat of water which originated in the North Sea/Skagerrak. Water with salinities up to 33 reaches the bay as a bottom current. Whether or not the inflow into Aarhus Bay was associated with inflow of the Jutland Current into the Kattegat is discussed. Strong gradients in salinity and thus density are found during the whole study period. Prior to this period, winds from the southwest had established a barotropic field from the Kattegat and towards the Baltic Sea. Wind direction changed to the southeast during the study period and the dense bottom water in Aarhus Bay withdrew. The study indicated that internal waves associated with tidal water were present in the layer of stratification. High SPM concentrations near the sea bed were presumed to be due to lateral advection from shallow water areas, as calculated bottom friction speeds were low. High positive SPM gradients below the layer of stratification were attributed to resuspension by internal waves, as calculated rates of resuspension by surface wave activity were insufficient to have produced them.
Tipo: | Text
Idioma: | Inglês
Identificador: | http://archimer.ifremer.fr/doc/00100/21167/18809.pdf
Editor: | Gauthier-Villars
Relação: | http://archimer.ifremer.fr/doc/00100/21167/
Formato: | application/pdf
Fonte: | Oceanologica Acta (0399-1784) (Gauthier-Villars), 1992 , Vol. 15 , N. 4 , P. 339-346