Marine Isotopy Toulouse

Marine Isotopy Toulouse

Publisher: Direction – Updated on 07/04/2021

Scientific objectives

The team’s objectives are threefold:

  1. To characterise the chemical fluxes (intensity, associated processes) at the ocean interfaces (continental margins, rivers, submarine groundwater discharge, air/sea interface, hydrothermal vents) which constitute chemical sources and/or sinks for the ocean,
  2. To constrain the circulation and dynamics of water masses (trajectories, transit time, vertical or horizontal mixing),
  3. To characterise the internal cycles of chemical elements in the water column. This requires, in particular, the study of dissolved/particle interactions, in relation to physical, chemical and biological processes.

Strategy and tools

Our strategy is based on the use of natural isotopic tracers analysed in samples collected in the ocean, laboratory experiments and modelling work. The tracers used are neodymium isotopes (radiogenic) and rare earths, iron isotopes (stable), radium, actinium and beryllium isotopes (radioactive). This strategy is based on a high expertise (both researchers and engineers), isotopic analyses of these trace elements in seawater and the use of our instrumental platforms.


We carry out studies in the framework of collaborative networks at national and international levels, in particular in connection with the GEOTRACES programme (e.g. PANDORA, GEOVIDE, TONGA, SWINGS campaigns, Mediterranean coastline).


Current thesis

Study of the radium isotopes along GEOTRACES oceanic sections

Name: Morgane LEON Start date: 01/10/2020 Thesis supervisor: Pieter VAN BEEK Co-supervision 1: Virginie SANIAL Co-supervision 2: Keywords: Circulation, GEOTRACES, Southern Ocean, Radium isotopes, Interface, Marine geochemistry.

Current thesis

Rare Earth elements and Nd isotopic composition: two major oceanic tracers in the North Atlantic Ocean (GEOVIDE cruise, GEOTRACES project)

Name: Marion LAGARDE Start date: 2018/10/01 Thesis supervisor:  Catherine JEANDEL Co-supervision 1: Pascale LHERMINIER Keywords: Géochimie marine, Meridional Overturning Circulation, Apports continents-océan, Concentration Terres rares, Isotopie Nd


Permanent staff

Firstname LASTNAMEGrade – Employer
Pieter VAN BEEKTeam Leader
Professor – UT3
Moustafa BELHADJ SENINIEngineer Assistant – CNRS
Mélanie GRENIERResearch Scientist – CNRS
Catherine JEANDELSenior Scientist – CNRS
Francois LACANSenior Scientist – CNRS
Elena MASFERRER DODASResearch Engineer – UT3
Catherine PRADOUXEngineer – CNRS
Marc SOUHAUTEngineer – CNRS
Thomas ZAMBARDIResearch Engineer – UT3

All team members