Monitoring, in the form of time series data, or of repeated observation and sampling, acquired at fixed point observatories or using mobile platforms and research vessels, is essential to understand oceanic processes from the surface to the oceanic sub-bottom. In this session, we welcome presentations that demonstrate the use of such monitoring results to address physical, chemical, biological and geological processes in the water column and at the seafloor. Multidiciplinarity, the use of several sets of complementary data, and an emphasis on the interactions between the hydrosphere, biosphere and geosphere are particularly welcome. We also welcome presentations on new ocean monitoring experiments, and on innovative technologies for marine observatories. This session is sponsored by the EMSO-ERIC.