4 Studying the Baltic Sea Circulation with Eulerian Tracers
119
Fig. 4.5 Mean age (in years) for the last 5 years of the 96-year spin-up associated to the tracer
marking inflowing water at the Darss and Drogden Sills. The figures depict age at the sea surface
(upper left panel), at the halocline depth (upper right panel), at the surface with a salinity of 17
(lower left panel), and at the longitudinal section S3 across the Baltic Sea (lower right panel).
The location of the section is shown as the white line in the lower left panel. Note the different
colour bars. In the upper right panel mean age is not depicted in shallow areas without a perennial
halocline, where the conceptual two-layer model does not apply. Per arbitrary definition these areas
(in brown) are characterized by a water depth less than 22.5 m. Is the salinity in the water column
below 17 the associated surface is set equal to the water depth. Hence, the lower left panel shows
bottom age in most of the Baltic interior. Adopted from Meier (2007)
119
Fig. 4.5 Mean age (in years) for the last 5 years of the 96-year spin-up associated to the tracer
marking inflowing water at the Darss and Drogden Sills. The figures depict age at the sea surface
(upper left panel), at the halocline depth (upper right panel), at the surface with a salinity of 17
(lower left panel), and at the longitudinal section S3 across the Baltic Sea (lower right panel).
The location of the section is shown as the white line in the lower left panel. Note the different
colour bars. In the upper right panel mean age is not depicted in shallow areas without a perennial
halocline, where the conceptual two-layer model does not apply. Per arbitrary definition these areas
(in brown) are characterized by a water depth less than 22.5 m. Is the salinity in the water column
below 17 the associated surface is set equal to the water depth. Hence, the lower left panel shows
bottom age in most of the Baltic interior. Adopted from Meier (2007)