Porewater concentrations of nitrate, nitrite, ammonium, manganese, and iron in sediments from the Atacama and Kermadec Trench regions

The file presents data collected during cruises on RV Tangaroa (TAN1711, 2017) to the Kermadec Trench and RV Sonne (SO261, 2018) to the Atacama Trench. Sample collection and analyses are described, and results are discussed in Thamdrup, B. et al. Anammox bacteria drive fixed nitrogen loss in hadal trench sediments. Proc. Natl. Acad. Sci. USA, in press, doi: 10.1073/pnas.2104529118.