E2-M3A station

Location of E2-M3A station
Location of E2-M3A station

Cool facts or discoveries

The E2-M3A system is characterized by a surface buoy and a single mooring line. The buoy hull of welded steel construction has a discus shape, which provides three main compartments, provision for installation of sensors, ballast compartments and provision for the attachment of the superstructure.

The surface buoy in a separated mooring line communicates with the instrument mooring through hydro-acoustic modems that allows the real data transfer from the platform to the land station.

Surface buoy of the E2-M3A line

The three types of measurements that are processed by the E2-M3A station are:

  • Air-sea interface measurements which includes a meteorological station and solar radiation sensor;
  • Biochemical and physical properties (pH and pCO2) of the subsurface layer through probes attached at 15m depth and transmitted to the surface buoy through an inductive cable;
  • Biochemical and physical properties (Temperature, Conductivity, Dissolved Oxygen, horizontal and vertical currents, transmissometer) of the seawater in the layer 100m-bottom through probes attached on a deep mooring line (connected by acoustic links to the surface buoy).

E2-M3A system ( Mooring Buoy pdf, Mooring VAML1 pdf )

The deployment of pCO2 sensor together with a pH sensor within the mixed layer allows to estimate the Carbon system at the site.

The analyses of long-term thermohaline and biogeochemical properties help us to understand the complex mechanisms of the deep convection process that take place in the Southern Adriatic Pit forming new oxygenated water that sinks to the deep layer. Furthermore, it allows to monitor changes that can be related to modifications in the general circulation of the Mediterranean Sea or, on an higher time scale, due to climate variability of the area.

Scientists or technicians in charge of the observatory

Fabio Brunetti
Vanessa Cardin

Name of their institution

Instituto Nazionale di Oceanografia e di Geofisica Sperimentale - OGS Trieste - Italy

Distance from shore

60 nautical miles (~6 hours steaming)

Max depth

1204 m