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 from sites in the North Sea:
Northern Dogger Bank, Oyster Ground and Sean Gasfield during various cruises
on RV Cefas Endeavour throughout 2007 and 2008.