Late-Quaternary stratigraphy of Baltic Sea basins - a review

Winterhalter, Boris

doi:10.17741/bgsf/64.2.007

Cited by 68 publications

(44 citation statements)

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“…4). This border is attributed to transformation of the freshwater Ancylus Lake into the Litorina Sea (Winterhalter 1992) and at each of the sites, chlorin abundance at depth obviously also depends on average temperatures in the past. The sediments most rich in chlorophyll a were those from the Gotland Deep (up to 52 nmol g -1 ), and had a value comparable with those in the surface 0-1 cm layer sediments of the Gda?sk Deep.…”

Section: Resultsmentioning

confidence: 99%

“…Due to analytical difficulties, pigments and their immediate derivatives (e.g. chlorins) have seldom been studied in sediments, in contrast to those in the water column (Eckardt et al 1991, 1992. Chlorin depth profiles in sediments have been related to palaeoproductivity in highly productive marine sites and favourable preservation conditions (Harris et al 1996).…”

Section: Introductionmentioning

confidence: 99%

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Algal pigments in Baltic sediments as markers of ecosystem and climate changes

Kowalewska¹

2001

Clim. Res.

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Chlorophylls and their derivatives, as well as β-carotene, were determined in recent (0 to 10 cm, not older than 100 yr) and old (up to 600 cm, ~8000 yr old) sediments from the Baltic Sea. The data are related to environmental conditions and historical data of exceptional meteorological events that have taken place in Poland and neighbouring countries since the 10th century. The results for recent sediments indicate that pigments are sensitive markers of primary production and of algal groups dominating the overlying water column, but also of sedimentary and postdepositional conditions, especially anoxia and hydrodynamic changes. Studies on deep sediments suggest that climatic phenomena might have had comparable or even greater influence on algal growth in the Baltic environment than present day anthropogenic input, i.e. pollution.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Algal pigments in Baltic sediments as markers of ecosystem and climate changes

Kowalewska¹

2001

Clim. Res.

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“…Clays of different ages and different Baltic Sea stages usually cover the bedrock of the Gulf of Finland area (Winterhalter 1992). Sometimes the bedrock crops out through the whole sediment sequence, while sometimes some of the sub seafloor stratigraphic components are missing.…”

Section: Introductionmentioning

confidence: 99%

Sediment and carbon accumulation rates off the southern coast of Finland

Vallius¹

2015

Baltica

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Sediment and carbon accumulation rates off the southern coast of Finland Henry ValliusValliusAbstract The southern coast of Finland encompasses about one third of the coasts of the Gulf of Finland. It is a mosaic of hundreds if not thousands of islands, peninsulas and bays, which also are reflected in the seabed of the coast. The sea floor is composed of a patchy and fragmented mosaic of mainly quite small basins separated from each other by thresholds of islands, peninsulas or submarine ridges. This affects transport and near bottom currents such that deposition of suspended particles is restricted to certain areas only. Linear sediment accumulation rates along the southern coast of Finland were studied from 28 cores of a sampling campaign in 2000-2004 through gamma spectrometry of 137 Cs. Sediment accumulation in this environment with such diverse character was found very patchy and net sedimentation rates varying from less than 0.5 cm/a to values of nearly 3 cm/a as well as mass accumulation rates from 0.5 kg/m 2 /a to 8.8 kg/m 2 /a were found. The sediment accumulation rates were observed to be higher in shallower water in coastal sheltered or semi-sheltered bays. Total carbon concentrations varied from 1.3 % to 12.6 % and carbon accumulation rates from 20 g/m 2 /a to 355 g/m 2 /a such that the highest carbon concentrations were usually found in deeper water with some distance from the coast, while the highest carbon accumulation rates were found in the coastal shallow basins where sediment accumulation was found strongest.

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“…Several studies (Winterhalter 1992;Sviridov et al 1997;Emelyanov 2001) have demonstrated that the sediments in the deep Gotland Basin are much more heterogeneous than previously assumed, which can be ascribed to bottom current activity related to the occasional flow of dense, saline water masses into the basin. Maximum water depth in the Bornholm Basin is close to 100 m. The sediment accumulation patterns in the basin display strong variations that can be attributed to specific pathways followed by the dense bottom currents associated with major saltwater inflows (Christoffersen et al 2007).…”

Section: Materials and Sediment Core Settingmentioning

confidence: 95%

The Baltic Sea inflow regime at the termination of the Medieval Climate Anomaly linked to North Atlantic circulation

Kuijpers

Kunzendorf

Rasmussen

et al. 2012

Baltica

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Baltic Sea water exchange is primarily governed by atmospheric forcing of the inflow of saline waters by strong westerly winds prevailing over the central North Atlantic and north-western Europe. Our sediment core study uses geochemical element records indicative of phytoplankton and cyanobacterial blooming as well as continent-derived mineral input for reconstructing hydrographic changes in the deeper Baltic Sea basins around AD 1200. An alkenone-based Sea Surface Temperature (SST) reconstruction for the relevant time span, AD 500-1500, is presented for another sediment core obtained from the shallow Isefjord located at the southern coast of the Kattegat at the entrance of the Baltic. At the termination of the Medieval Climate Anomaly at approximately AD 1200, the basin sediment facies and the geochemical records reveal an environmental change indicative of a marked decrease of inflow activity and marine productivity. This change coincides with a SST decrease and recently reported general fall in Kattegat sea level. A comparison with palaeo-climate data from the wider North Atlantic region demonstrates that this regime shift in Baltic Sea water exchange is linked to a large-scale change in ocean and atmosphere circulation from a dominating, positive North Atlantic Oscillation (NAO+) mode to more negative NAO conditions.

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Late-Quaternary stratigraphy of Baltic Sea basins - a review

Cited by 68 publications

References 0 publications

Algal pigments in Baltic sediments as markers of ecosystem and climate changes

Algal pigments in Baltic sediments as markers of ecosystem and climate changes

Sediment and carbon accumulation rates off the southern coast of Finland

The Baltic Sea inflow regime at the termination of the Medieval Climate Anomaly linked to North Atlantic circulation

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