Spiekeroog beach subterranean estuary & seawater: Environmental data@en

Data from pore water (subterranean estuary) and seawater from Spiekeroog south (near ICBM time series station and campsite) and west beach (\"Sturmeck\"). South beach data were collected in August 2012, and west beach data were collected in November 2012. Pore water (event labels: DUNE, MIX, LTWL) sample collection was conducted at different sediment depths (50, 100, 150 cm below sediment surface). Stainless steel push-point lancets were insetred into the sediment, and pore water was withdrawn via vacuum (hand pumps) into nalgene polycarbonate bottles. Filtration was done using inline PES cartridge filters. The vacuum bottles were argon gas-flushed to avoid oxygen contamination. Sea water (event label SW) was collected with polycarbonate bottles and from LDPE seepage meter bags (event label SP) and filtered upon return to the laboratory (same day, PES filter cartridges). Sample collection was trace organic and metal clean (soaking and rinsing of bottles, tubing, and filters with diluted HNO3 and HCl suprapur), with sample materials consisting of polyethylene, polypropylene, and polycarbonate. Solid-phase extraction was done with BOND Elut PPL cartridges and elution with Methanol Optima grade. Measurements were done with VA Computrace 757 (Cu ligand concentrations and stability constants), HR-ICP-MS (Cu, Fe, and Mn concentrations), spectrophotometry (nutrients), and TOC analyzer (DOC and TDN).本数据集涵盖施皮克奥格岛（Spiekeroog）南部（临近ICBM时间序列站及露营地）与西部海滩（"Sturmeck"）的孔隙水（pore water，地下河口subterranean estuary）及海水样品数据。南部海滩样品数据采集于2012年8月，西部海滩样品数据采集于2012年11月。孔隙水样品（事件标签：DUNE、MIX、LTWL）的采集覆盖不同沉积物深度（沉积物表面下50、100、150 cm）：将推式不锈钢穿刺针插入沉积物中，通过真空装置（手动泵）将孔隙水抽取至耐洁（nalgene）聚碳酸酯瓶中；采用在线聚醚砜（PES）筒式过滤器完成过滤。真空瓶经氩气吹扫以避免氧气污染。海水样品（事件标签：SW）采用聚碳酸酯瓶及低密度聚乙烯（LDPE）渗流仪袋（事件标签：SP）采集，并在返回实验室当日采用PES筒式过滤器完成过滤。样品采集遵循痕量有机物与金属洁净处理规范：采用稀释的超纯硝酸（HNO₃）与超纯盐酸（HCl suprapur）浸泡、冲洗样品瓶、管路及过滤器；样品容器材质包括聚乙烯（polyethylene）、聚丙烯（polypropylene）及聚碳酸酯（polycarbonate）。本次实验采用BOND Elut PPL固相萃取柱完成固相萃取，并采用色谱级甲醇（Methanol Optima grade）进行洗脱。样品测试使用以下仪器与方法：VA Computrace 757伏安仪（检测铜配体浓度及稳定常数）、高分辨电感耦合等离子体质谱仪（HR-ICP-MS，检测Cu、Fe、Mn浓度）、分光光度法（检测营养盐）及总有机碳（TOC）分析仪（检测溶解有机碳（DOC）与总溶解氮（TDN））。