1H NMR spectra of whole porewater dissolved organic matter (DOM) samples from California margin sediments sampled in 2020 onboard the R/V Sikuliaq

1H NMR spectra of whole dissolved organic matter (DOM) samples are reported for StaD and StaK, located in the upper slope offshore central California. Sediment and porewater sampling were done in Dec 2020 onboard the R/V Sikuliaq. Sediment samples were retrieved using multi-cores and gravity cores operated by the Oregon State University Marine Rock and Sediment Sampling Group. Porewater samples were extracted from the sediment within hours of core retrieval in a refrigerated van. Rhizon samplers were used to collect porewater from multicores, whereas centrifugation was used for porewater collection from gravity cores. Upon collection, porewater samples were immediately poisoned with mercuric chloride and flame-sealed in glass ampules under a stream of ultra-high-purity nitrogen gas and refrigerated until analysis. Reported here are 1H NMR spectra of whole DOM samples, UV-irradiated deionized water blanks collected on the ship, and UV-irradiated deionized water pulled through Rhizon samplers (all 0.2-micron filtered).本数据集报道了位于加利福尼亚中部近海上层斜坡区域的StaD与StaK站位的全态溶解有机质（Dissolved Organic Matter, DOM）样品的氢核磁共振（1H NMR）谱图。沉积物与孔隙水采样工作于2020年12月在“锡利库阿克号”（R/V Sikuliaq）考察船上完成。沉积物样品由俄勒冈州立大学海洋岩石与沉积物采样团队使用多管采样器（multi-cores）与重力岩心采样器（gravity cores）采集获取。岩心取回后数小时内，即在冷藏车中完成沉积物中孔隙水样品的提取。对于多管采样器获取的沉积物，采用Rhizon孔隙水采样器（Rhizon samplers）收集孔隙水；而对于重力岩心采样器获取的沉积物，则采用离心法收集孔隙水。样品采集完成后，立即向孔隙水样品中加入氯化汞进行灭活固定，随后在超高纯氮气气流下将样品焰封于玻璃安瓿瓶中，并冷藏保存直至后续分析。本数据集所报道的样品包括：全态溶解有机质（DOM）样品的氢核磁共振（1H NMR）谱图、船上采集的紫外辐照去离子水空白对照样，以及经Rhizon孔隙水采样器处理且均经过0.2微米滤膜过滤的紫外辐照去离子水样品。