Holocene Evolution of the Southern Baltic Sea Coast and Interplay of Sea-Level Variation, Isostasy, Accommodation and Sediment Supply - The Baltic Sea Basin - page 236

Gedser

C

0.9

0.6

1.0

Saßnitz

B

Puttgarden

0.8

0.7

Barth

1.2

A

Warnemünde

1.6

1.1

1.4

Travemünde

Swinemünde

Wismar

Fig. 12.2 The Wismar Bay ( A ), Fischland ( B ) and north Rügen/Hiddensee ( C ) study areas and cur-
rent relative sea-level rise (mm/year) at different gauge stations in the southern Baltic Sea (Dietrich
and Liebsch 2000 )

only slightly, and shoreline evolution was characterized mainly by progradation and
dune belt development.
The recent relative sea-level change was investigated using repeated precision
levelling and long-termmareograph records (Montag 1967 , Bankwitz 1971 , Liebsch
1997 , Dietrich and Liebsch 2000 ) . The change in pattern, constrained from the latter,
is shown in Fig. 12.2 . It indicates a shoreline tilt with a relatively slower sea-level
rise on Rügen than is at Wismar. The eustatic rise during the past 100 years is
estimated to be 1-1.2 mm/year (Dietrich and Liebsch 2000 , Stigge 2003 ) . It cor-
responds to the relative rise between the Fischland and the coastal section west
of Warnemünde and means that a slight but increasing crustal uplift occurs from
there towards Rügen and a subsidence towards Wismar and Travemünde. This was
already concluded by Kolp ( 1982 ) and Ekman ( 1996 ) , who marked the -1 mm/year
isobase as the isoline where the glacio-isostatic emergence fades out.

12.3 Data Acquisition

Sea-level curves deduced from regionally distributed data might be flawed by differ-
ential crustal motions. To avoid this source of error, Kíden et al. ( 2002 ) recommend
sampling areas not larger than 15-30 km in diameter to guarantee that differences
in the crustal movement within the area are small and negligible. For this investiga-
tion, data from the three study areas, Wismar Bay (Lampe et al. 2005 ) , Fischland and
North Rügen/Hiddensee (Lampe et al. 2007 ) , were used which are located along the