Data present the comparison between sediment oxygen microprofiles as measured in situ at 2200 m water depth and shipboard in sediment retrieved from the same station. More details are provided in the following publication: Epping, Eric & van der Zee, Claar & Soetaert, K & Helder, Willem. (2002). On the oxidation and burial of organic carbon in sediments of the Iberian Margin and Nazaré Canyon (NE Atlantic). Progress In Oceanography. 52. 399-431. doi:10.1016/S0079-6611(02)00017-4. Funding agency: European Community EC-MAST OMEX-II project (MAS3-CT96-0056) Data are presented in .csv file format using semicolon delimiter Sediment depth is given in units of cm Oxygen concentrations are given in units of micromolar