Physical and chemical properties, 14C ages and palynology of sediment cores from the Western Baltic Sea

Sea level related radiocarbon, palynological and stratigraphical data from sediment cores in the Western Baltic have been tested against the existing sea level curves for the region. The relative sea level rise curves for the beginning of the Holocene show no significant deviations between the Kiel, Mecklenburg und Lübeck Bays and hence do not support the previously reported differences in the averaged regional subsidence rates for this time interval. Local subsidence and upheaval due to salt tectonics probably played a greater role than previously suspected in the region. The sea level possibly stagnated around -28 m during the early Holocene before rising very rapidly to -14 m. The submarine terraces at -30 m and perhaps also at -27 m were formed during the lacustrine phase of the Western Baltic when the water levels were controlled by the main thresholds in the Great Belt.

本次研究针对西波罗的海海域沉积物岩芯中获取的与海平面相关的放射性碳（radiocarbon）、孢粉学（palynological）及地层学（stratigraphical）数据，与该区域已有的海平面曲线开展了对比验证。全新世（Holocene）初期的相对海平面上升曲线显示，基尔湾、梅克伦堡湾与吕贝克湾之间并无显著偏差，因此无法支持此前报道的该时段区域平均沉降速率存在差异的结论。该区域因盐构造（salt tectonics）引发的局部沉降与抬升作用，其影响程度或远超此前的推测。在全新世早期，海平面可能曾停滞于-28米左右，随后快速上升至-14米。海拔-30米（或许还有-27米）处的海底阶地（submarine terraces）形成于西波罗的海的湖泊相阶段，彼时其水位受大贝尔特海峡（Great Belt）主门槛值控制。