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

研究的目标是建立一个统一的时空模型，以反映特拉夫河和奥德泻湖之间波罗的海南部海岸的演变。调查的重点是从公元前8000年到现在，即从利托里纳海侵开始的时间。通过放射性碳定年沉积物岩心，研究了三个时间片的相对海平面上升过程、上升和新构造成分的比例、海平面振荡的特征、幅度和周期性以及风暴洪水沉积物（风暴层）的时间分布。重点研究了具有不同淹没速率特征的地点，从而形成了具有不同新构造运动部分的局部海岸线位移曲线。这些过程的平稳性、洪水事件的时间分布和沿海景观的气候驱动变化将得到结论。全新世主要海岸构造的相构型，如吐槽、堰洲吐槽、沙平面和泻湖，必须通过钻井和地球物理方法来确定。这样就可以对海岸结构进行三维建模，并用地质统计学方法计算特定时间点的体积。将这些体积与海平面振荡的不同阶段及其程度联系起来，应该能提供有关物质来源、形态变化速度的新见解，并在部分程度上（取决于气候预测）得出海岸未来将如何变化的结论。

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.