This dataset records the depth to which free oxygen is available in seabed
sediments; referred to as the Oxygen Penetration Depth (OPD). It also includes
the original oxygen profile data, recording the depeletion of oxygen as the
sediment is penetrated. Samples were collected in the English and Dutch
sectors of the Greater North Sea during three cruises on RV Cefas Endeavour
(Cruise Codes CEND 15/09, CEND 11/10 and CEND 11/11).