Spiekeroog beach subterranean estuary & seawater: Dissolved organic matter (DOM) fingerprints

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 Stainless steel push-point lancets were insetred into the sediment, and pore water was withdrawn via vacuum (hand pumps) into nalgene polycarbonate bottles.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. […]本数据集涵盖施皮克奥格岛（Spiekeroog）南部（毗邻ICBM时间序列站及露营地）与西部海滩（"Sturmeck"）的孔隙水（pore water，采集自地下河口（subterranean estuary））及海水数据。其中南部海滩数据采集于2012年8月，西部海滩数据采集于2012年11月。 孔隙水样本（事件标签：DUNE、MIX、LTWL）的采样工作在沉积物不同深度（沉积物表面下50 cm、100 cm、150 cm）开展：将不锈钢推针式取样器插入沉积物，通过真空装置（手动泵）将孔隙水抽取至Nalgene聚碳酸酯（polycarbonate）瓶中；采用在线PES（polyethersulfone，聚醚砜）筒式过滤器完成过滤；为避免氧气污染，真空瓶经氩气（argon gas）吹扫处理。 海水样本方面，事件标签为SW的样本采用聚碳酸酯瓶采集，事件标签为SP的样本取自低密度聚乙烯（low-density polyethylene, LDPE）渗漏计袋，所有海水样本均在返回实验室当日使用PES筒式过滤器完成过滤。 本次采样遵循痕量有机物与金属洁净采样规范：采样器材（包括采样瓶、管路及过滤器）经稀释的Suprapur级硝酸与盐酸浸泡、冲洗，所用采样器材材质涵盖聚乙烯、聚丙烯及聚碳酸酯。 固相萃取（solid-phase extraction）采用Bond Elut PPL固相萃取柱，以Optima级甲醇作为洗脱溶剂。[...]