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Temporal and spatial evolution of the Baltic deep water renewal in spring 2003

100%

Feistel R., Nausch G., Matthaus W., Hagen E.

Oceanologia

2003

tom 45

nr 4

In January 2003, a deep-water renewal process in the Baltic Sea commenced with an inflow of about 200 km3 of cold and well oxygenated water from the Kattegat, half of which was of salinity >17 PSU; it is considered to be the most important inflow since 1993. Related front propagation and the ventilation of anoxic waters between the western and the central Baltic were recorded by the Darss Sill measuring mast, the Arkona Basin buoy, a subsurface mooring in the Eastern Gotland Basin, and hydrographic research cruises conducted in January, February, March, May and August 2003. Already in May, the central Gotland Basin was reached by water with near-bottom oxygen concentrations among the highest ever recorded there. A comprehensive review of the observed spatial and temporal structures together with additional background data is presented. Estimates of the intensity of the present inflow are discussed.

Unusual Baltic inflow activity in 2002-2003 and varying deep-water properties

84%

Feistel R., Nausch G., Hagen E.

Oceanologia

2006

tom 48

nr S

The unusual sequence of inflow events into the Baltic Sea that occurred in 2002 and 2003 includes the first ever important baroclinic inflow to be described (August 2002), the Major Baltic Inflow (January 2003), which gave rise to the highest oxygen levels in the Gotland Deep since the 1930s, and the baroclinic inflow (August 2003) that elevated the Gotland Basin deep water salinity to values last observed in 1977, and caused the surface salinity to rise again. From these trend changes, salt residence times were estimated at about 20 years in the deep waters and 30 years above the pycnocline. Ventilation of the remote Karlsö Deep took until 2005, two years after the inflow event responsible, at a time when the Bornholm and Eastern Gotland Basins were already returning to stagnation.

Ograniczanie wyników

2 Oceanologia

2 Feistel R.

2 Hagen E.

2 Nausch G.

1 Matthaus W.

1 2006

1 2003

Wyniki wyszukiwania

Temporal and spatial evolution of the Baltic deep water renewal in spring 2003

Unusual Baltic inflow activity in 2002-2003 and varying deep-water properties