Tab. I: Alkenon analyses on sample material of cores Krummland KR-1 und Dagebüll DA-1

Geochemical studies of organic "biomarker" compounds were applied to Eemian sediments cored at Dagebuell (DA-1) on the west coast, and at Krummland (KR-1) in the east of the Baltic Zone of Schleswig-Holstein, Germany. 10 samples from the early stage of the Eemian Transgression to the high Eem at Krummland, and 24 samples from the peak and late phases of the Eemian at Dagebuell provide new insights on the development of the Eemian Sea in the region.
C37-C39-ethyl- and methyl-ketones in the Krummland sediments indicated unstable conditions at the onset of the marine trangression, and freshwater influence in keeping with their shallow nearshore environment. In the Dagebuell deposits, patterns typical of marine to brackish conditions were observed, comparable to those found today in the Skagerrak and Belt Sea areas. The sea-surface temperatures estimated from the alkenone unsaturation ratio UK37 at DA-1 corroborate the evidence from "standard" faunal and pollen assemblages, and lithological successions. Here, the temperature maximum attained in pollen assemblage zone PAZ Illc, indicates the early onset of very warm conditions, preceding the highest sea level of the penultimate interglacial by 8,000 years, based on previously published U/Th ages.

针对德国石勒苏益格-荷尔斯泰因州波罗的海区域西海岸达格布埃尔（Dagebuell，DA-1）与东部克鲁姆兰（Krummland，KR-1）两处获取的岩芯沉积物，研究人员采用有机“生物标志物”（organic "biomarker"）化合物开展了地球化学研究。其中，克鲁姆兰站点的10份样品覆盖埃姆海侵（Eemian Transgression）早期至埃姆期高水位阶段，达格布埃尔站点的24份样品涵盖埃姆期峰值期与晚阶段，二者为该区域埃姆海的演化过程提供了全新认知。
克鲁姆兰沉积物中的C₃₇-C₃₉乙基及甲基酮类化合物显示，海侵初期环境不稳定，且受淡水影响显著，这与其浅近岸沉积环境相契合。达格布埃尔的沉积层中则观测到海相至微咸水环境的典型特征，与现今斯卡格拉克海峡（Skagerrak）和贝尔特海（Belt Sea）区域的特征一致。通过DA-1站点烯酮不饱和比值UK₃₇（alkenone unsaturation ratio UK37）估算得到的海面温度，与“标准”动物群与孢粉组合（faunal and pollen assemblages）以及岩性序列（lithological successions）的证据相互印证。基于已发表的铀钍（U/Th）年代数据，该区域孢粉组合带PAZ Ⅲc所对应的温度峰值表明，极端温暖的环境早在倒数第二次间冰期最高海平面出现前8000年就已初步形成。