Littorina Sea Since Ca 8700 Cal Yr BP Relative Sea Level Curves

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M 1820 E O N E T LL E ET MA Global sea level rise and changing erosion: examples from the Baltic Sea Basin

Alar Rosentau University of Tartu, Estonia Jan Harff, Szczecin University, Poland; IOW Warnemünde, Germany Birgit Hünicke, Helmholtz-Zentrum Geesthacht, Germany Ice sheet extension during LGM

Svendsen, J.I. et al. 2004.Late Quaternary ice sheet history of northern Eurasia. Quaternary Science Reviews 23, 1229–1271 Ice sheet extension during LGM

Svendsen, J.I. et al. 2004.Late Quaternary ice sheet history of northern Eurasia. Quaternary Science Reviews 23, 1229–1271 Tide-gauge measurements

data by Ekman, 1996 Vertical crustal movements

data by Lidberg et al., 2007 Eustatic sea level

Black: Global eustatic sea level curve of Waelbroeck et al. (2002) Red: Barbados eustatic curve using ICE-5G(VM2) model Purple “step-discontinuous” curve, the “ice equivalent” eustatic sea level history of the ICE-5G model of global deglaciation

m bsl

Peltier 2007 History of the Baltic Sea

Baltic Ice Lake ca 15 000- 11 700 cal yr BP History of the Baltic Sea

Yoldia Sea ca 11 700- 10 800 cal yr BP History of the Baltic Sea

Ancylus Lake ca 10 800- 8 700 cal yr BP History of the Baltic Sea

Littorina Sea Since ca 8700 cal yr BP Relative sea level curves

Rosentau, A., Meyer, M., Harff, J, Dietrich, R, Richter, A. 2007 RSL change model for Littorina Sea Changes in volume and area

Rosentau, A et al. 2007 Relative sea level curves

Rosentau, A., Meyer, M., Harff, J, Dietrich, R, Richter, A. 2007 Relative sea level curves Model Application

Zhang et al. (2011) Relative sea level curves

Rosentau, A., Meyer, M., Harff, J, Dietrich, R, Richter, A. 2007 Submerged settlements Pulli Mesolithic site (11.3-10.2 cal ka BP) Typical arrows Pulli (11.3-10.2 cal ka BP) from different time periods Sindi-Lodja II (9.3-8.4 cal ka BP)

5 cm

Lemmetsa (6.2-4.0 cal ka BP) Photos by Aivar Kriiska Sindi-Lodja II Mesolithic site (9.3-8.4 cal ka BP)

buried under Ancylus Lake sediments buried under Littorina sediments Water-level change curve Ancylus Lake 10500 cal. BP

Pulli AMS dates (cal ka BP): 10.4-10.2 elk 10.8-10.5 charcoal 10.8-10.2 seeds Ancylus Lake 10200 cal. BP

Pulli AMS dates (cal ka BP): 10.4-10.2 elk 10.8-10.5 charcoal 10.8-10.2 seeds Submerged settlements Pulli Mesolithic site (11.3-10.2 cal ka BP) Typical arrows Pulli (11.3-10.2 cal ka BP) from different time periods Sindi-Lodja II (9.3-8.4 cal ka BP)

5 cm

Lemmetsa (6.2-4.0 cal ka BP) Photos by Aivar Kriiska Sindi-Lodja II Mesolithic site (9.3-8.4 cal ka BP)

buried under Ancylus Lake sediments buried under Littorina sediments Litorina Sea 9000 cal. BP

Sindi-Lodja AMS dates (cal ka BP): 9.2-8.8 charcoal Litorina Sea 7300 cal. BP

Sindi-Lodja AMS dates (cal ka BP): 9.2-8.8 charcoal RSL change rates is past and present

RSL rise during the early Holocene was at about 6 mm/yr

data by Ekman, 1996 Erosion and coastal change in southern Baltic

Coastal Change [m/100 years] -45 -20 -20 -60 -40 -115 0 -25 -50 -120 -85 -90 +400 -60 -70 -55 -210 -40 -40 -120-30 +150 -60 -20 -30 -35 -35 -70 -25 -15 -55 0 -90 -25 -25 -50 -45 +65 -30 -55 -30

STAUN, 1994 Conclusion (1)

•For times of relative rapid sea level rise – as during the early Holocene palaeolandscapes are rather drawn preserving their former shape.

•In periods of slow sea level rise – as during the late Holocene locally more stable hydrographic forcing reworks intensely the substrate of the coastal zone destroying also eventually archaeological sites. Conclusion (2)

•Integrated modelling approaches of climate and glacioisostasy can proof favourable conditions for the preservation of palaeolandscapes.

•These approaches may provide valuable prerequisites for planning and executing of archaeological surveys on the continental shelf.