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1 May 2006 Permanent Seafloor Anoxia in Coastal Basins of the Northwestern Gulf of Finland, Baltic Sea
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Abstract
The Gulf of Finland is regularly affected by inflows of anoxic deep-water masses from the northern Baltic proper. These dense water masses advance over large areas with a decline of benthic life in affected areas as a result. Such events have been regularly repeated over decades and centuries. The archipelago, however, is well protected, because the inflows of anoxic deep waters do not enter such shallow waters. The situation could thus be better for benthic life in the archipelago, but in many areas this is not true. In areas where the bottoms are sheltered from storms and currents, permanent anoxia can persist for decades. Such areas were found in the western archipelago of the Gulf of Finland. Examination of surface cores revealed that many of these basins have been continuously anoxic for almost 40 years. A deeper coring showed that, at least locally, shallow water sea-floor anoxia has been a fact in the area for thousands of years.
and Henry Vallius "Permanent Seafloor Anoxia in Coastal Basins of the Northwestern Gulf of Finland, Baltic Sea," AMBIO: A Journal of the Human Environment 35(3), (1 May 2006). https://doi.org/10.1579/0044-7447(2006)35[105:PSAICB]2.0.CO;2
Received: 5 April 2005; Accepted: 1 September 2005; Published: 1 May 2006
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