Holocene evolution of an irregularly sinking coast: the interplay of eustasy, neotectonics and sediment supply

这项研究的目标是开发一个关于特拉夫河和奥德泻湖之间的波罗的海南部海岸演变的一致的时空模型。调查的重点是从公元前8000历年到现在，即从利托里纳海侵开始以来的时间。在三个时间切片中，必须从放射性碳测年沉积物岩芯中研究相对海平面上升的过程、海平面和新构造成分的比例、海平面波动的特征、幅度和周期性以及暴雨洪水沉积(风暴层)的时间分布。重点是具有不同沉没率的地点，这使得能够根据新构造运动的不同部分来开发局部海岸线位移曲线。关于这些过程的平稳性、洪水事件的时间分布和气候驱动的海岸景观变化的结论将是结果。必须通过钻探和地球物理方法来识别全新世主要海岸构造的相结构，如唾液、障碍物、砂面和泻湖。这使得可以对沿海结构进行三维建模，并使用特定时间点的地质统计学方法计算其体积。将这些数量与海平面波动的不同阶段及其程度联系起来，应该会提供关于物质来源、形态变化速率的新见解，并允许--部分和取决于气候预测--得出未来海岸将如何变化的结论。

The target of the research is the development of a consistent space-time-model of the evolution of the southern Baltic coast between Trave river and the Oder lagoon. The investigations focus on the period from 8000 calendar years BC to the present, i.e. on the time since the onset of the Litorina transgression. In three time slices the course of the relative sea-level rise, the proportions of eustatic and neotectonic components, the character, magnitude and periodicity of sea-level oscillations and the temporal distribution of storm flood deposits (tempestitic layers) have to be investigated from radiocarbon dated sediment cores. The focus is on sites characterized by different rates of submergence, which enables to develop local shoreline displacement curves with varying portions of neotectonic movements. Conclusions about the stationarity of these processes, the temporal distribution of flood events and the climate driven changes of the coastal landscape will be the result. The facies architecture of the main Holocene coastal structures as spits, barrier spits, sand planes, and lagoons has to be identified by means of drilling and geophysical methods. This allows the three dimensional modelling of the coastal structure and the calculation of its volume with geostatistical methods for particular points of time. Relating these volumes to different phases of the sea-level oscillations and their extent should provide new insights about the provenience of the material, the rates of morphological change and allows - in parts and depending on climate predictions - conclusions how the coast will change in the future.