Long term ocean bottom pressure measurements in the deep Southern Ocean 2011 to 2014 at 37S@en

Ocean bottom pressure (OBP) variability serves as a proxy of ocean mass variability, the knowledge of which is needed in geophysical applications. We present a new multi-year data set, obtained with an array of bottom pressure gauges deployed deeply along a transect across the Southern Ocean. We present a description of OBP data and show large scale correlations over several thousand kilometres at all time scales using daily and monthly averaged data. Annual and semi-annual cycles are weak. Close to the Agulhas Retroflection, signals of up to 30 cm equivalent water height (EWH) are detected. Further south, signals are mostly intermittent and noisy. […]