Last Interglacial sea-level data points from Northwest Europe

This dataset contains known preserved Last Interglacial (Eemian, Ipswichian, MIS 5e, MIS 5) sea level proxies for NW Europe: from along the shores of the English Channel and North Sea, and from their offshore areas. This V2 version includes 146 sea-level indicator data points from in and around the North Sea (35 entries in Netherlands, 10 Belgium, 23 in Germany, 17 in Denmark, 9 in Britain) and the English Channel (24 entries for the British and 25 for the French side, 3 on the Channel Isles), believed to be a representative and fairly complete inventory and assessment coming from some 80 published sites. The database also includes a modest subselection of data points from older interglacials (six sites), for comparative use. The dataset has been constructed in and has been exported from the World Atlas of Last Interglacial Shorelines (WALIS) database (https://warmcoasts.eu/world-atlas.html). The sea level proxies in majority are obtained from localities with well developed lithostratigraphic (MIS-6 aged ‘Saalian’ glaciogenic landforms and deposits as the substrate), morphostratigraphic (position in terrace flights), Amino-Acid Racemization, and biostratigraphic constraints ('Lusitanian' molluscan, foraminifera, pollen successions, other). The majority of European continental sites have chronostratigraphic age-control (regional encoding scheme included in dataset) notably by correlation to regional Pollen Association Zones with varve-count based durations (reckoned to span at least 11,000 years of temperate interglacial conditions; matching a good part of MIS 5e), and/or Foraminiferal Association Zones (echoing marine environmental and paleogeographic changes), and/or from AAR zones (majority of British sites, selected sites of mainland NW Europe; albeit for many sites older, lesser quality applications of the technique). In all regions, some of the marine deposits and bracketing terrestrial ones have also been independently dated using luminescence (IRSL, OSL, TL), U-series and ESR techniques.本数据集收录了西北欧已知的末次间冰期（Last Interglacial）海平面代用指标，对应埃姆间冰期（Eemian）、伊普斯威奇间冰期（Ipswichian），即海洋同位素阶段5e（MIS 5e）、5（MIS 5），采样区域涵盖英吉利海峡（English Channel）与北海（North Sea）沿岸及其近海海域。该V2版本共包含146个海平面指示数据点，分布于北海及其周边区域（其中荷兰35条、比利时10条、德国23条、丹麦17条、英国9条）与英吉利海峡区域（英国沿岸24条、法国沿岸25条、海峡群岛3条），其数据源自约80个已发表的研究位点，被认为是一套具有代表性且较为完整的编目与评估成果。本数据库还纳入了少量来自更老间冰期的数据点（共6个位点），用于对比分析。本数据集构建并导出自《末次间冰期海岸带世界地图集》（World Atlas of Last Interglacial Shorelines, WALIS）数据库（https://warmcoasts.eu/world-atlas.html）。本数据集的绝大多数海平面代用指标均采自具有明确地层约束的点位：包括发育良好的岩石地层学（lithostratigraphic）约束（以MIS 6时期的“萨勒”（Saalian）冰成地貌与沉积物作为基底）、地貌地层学（morphostratigraphic）约束（即阶地序列中的位置）、氨基酸外消旋（Amino-Acid Racemization）以及生物地层学（biostratigraphic）约束（如“卢西塔尼亚”（Lusitanian）软体动物组合、有孔虫（foraminifera）、孢粉（pollen）序列等）。绝大多数欧洲大陆位点均具备年代地层学（chronostratigraphic）年龄约束，数据集内置区域编码方案，主要通过以下方式实现：与基于纹层计数（varve-count）定年的区域孢粉组合带对比，其推算的温带间冰期持续时长至少为11000年，与MIS 5e的大部分时段相吻合；与有孔虫组合带对比，该组合带可反映海洋环境与古地理变化；或通过氨基酸外消旋（AAR）定年，该方法多用于多数英国位点以及西北欧大陆部分选定位点，不过部分老位点的该技术应用精度较低。在所有研究区域中，部分海洋沉积物及其围岩沉积物还通过光释光（luminescence，含IRSL、OSL、TL）、铀系（U-series）以及电子自旋共振（ESR）技术进行了独立定年。