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Abstract:
A modeling methodology based on a multi-scale hybrid morphodynamic model
and representative climatic driving conditions is presented to study the
long-term morphological evolution of wave-dominated coasts on a
centennial-to-millennial scale. The Darss-Zingst peninsula at the
southern Baltic Sea, which developed during the last 6000 years by a
combined effect of eustatic sea level change, isostatic movement,
meteorological drivers and nearshore sediment dynamics, is selected for
a case study. A paleo-Digital Elevation Model (DEM) serving as initial
condition is reconstructed by a compilation of recent digital elevation
data sets, an eustatic sea-level curve, an isostatic map and dated
sediment cores. Representative wind series are generated based on a
statistical analysis of paleo-wind data from a simulation with the
coupled atmosphere-ocean general circulation model ECHO-G over the last
7000 cal yr. These wind data were calibrated by proxies from
lithostratigraphic studies of sediment cores from the central Baltic
Sea, and used as climate driving conditions for the morphodynamic model.
Based on the reconstructed paleo-DEM and the representative climatic
driving conditions, the methodology is applied to reconstruct the
Holocene morphogenesis of the Darss-Zingst peninsula since 6000 cal yr
BP. Simulation results indicate that the development of the barrier
system is a combination of long-term effects of climate change,
isostatic crustal movement, wave dynamics and eolian transport with
short-term effects of extreme wind events, i.e. storms. (c) 2013
Elsevier B.V. All rights reserved.