The 14C and 13C abundances of porewater DOC and sediment SOC from a mangrove swamp of southern China

This data was derived from three sediment cores, collected from a mangrove swamp of southern China along the elevation gradient, with a Russian peat sampler to a depth of 50 cm during May 2017. Pore water extraction was carried out on sediment sections at the depths of 0-4 cm, 4-8 cm, 8-12 cm, 12-16 cm, 16-20 cm, 20-28 cm, 28-36 cm, and 36-44 cm. The concentrations of DOC were analyzed by the high temperature combustion (HTC) method using a Shimadzu TOC-L Total Organic Carbon Analyzer with an ASI-L auto-sampler. The contents of SOC were analyzed using a Thermo Flash 2000 CHNS/O Analyzer after acidification with 10% HCl. The 13C and 14C abundances were analyzed for both of DOC and SOC, and the UV-oxidation method was used for δ13C-DOC and Δ14C-DOC analyses. Analyses of Δ14C and δ13C were measured at the National Ocean Science Accelerator Mass Spectrometry (NOSAMS) facilities at Woods Hole Oceanographic Institution (WHOI).