Deployment: TONGA RECUP

The first objective of the TONGA RECUP campaign was to recover the fixed mooring launched on 1/12/2019 during the TONGA campaign, (position: 20°42.408 S / 177°52.128). The 4 instruments on the mooring line closed automatically once the last sample collected on 1/11/2020. The recovery date was conditioned by this.

The 2nd objective of the TONGA RECUP campaign was to reoccupy 3 stations that were sampled one year earlier (TONGA campaign) in order to refine the delta 15N budget necessary for the interpretation of some mooring results: 2 stations in the Lau basin, close to the mooring and under the expected influence of shallow hydrothermal fluids and a more distant station that will be able to serve as a reference that will be little or not influenced by the emissions of the shallow underwater volcanoes of the TONGA Arc.

More information can be found on the project website: http://tonga-project.org/web/