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by Pieter van Beek — last modified Dec 07, 2017 01:25 PM


  • Professor at the University Toulouse III Paul Sabatier, France
  • Marine geochemist at LEGOS, Laboratoire d’Etudes en Géophysique et Océanographie Spatiales,Observatoire Midi Pyrénées, Toulouse, France
  • Head of the group of Marine Geochemistry at LEGOS (Toulouse Isotopie Marine, TIM) since March 2020
  • Head of the Underground laboratory of Ferrières (LAFARA), French Pyrénées: Low background gamma spectrometry facility (
  • Ph.D. Oceanology, Meteorology and Environment, University Pierre et Marie Curie, Paris VI, France


Background and mobility

  •  since 2015: Professor at the University of Toulouse III Paul Sabatier; Researcher at LEGOS, Toulouse, France
  •  2003-2015: Lecturer at the University of Toulouse III Paul Sabatier; Researcher at LEGOS, Toulouse, France
  • 2003: Postdoctoral Fellow, University of Edinburgh, Scotland (Marie Curie Fellowship) Advisor: Raja Ganeshram
  •  2002: Postdoctoral Fellow, Woods Hole Oceanographic Institution, USA (Lavoisier Fellowship) Advisor: Roger François
  • 1998-2001: PhD Thesis at LSCE, Gif-sur-Yvette, France (CEA Fellowship) Supervisor: Jean-Louis Reyss


Awards and prizes

  • 2003: Marie Curie Fellowship (postdoctoral Fellow at the University of Edinburgh, UK)
  • 2002: Lavoisier Fellowship (postdoctoral Fellow at WHOI, Woods Hole, USA)



  • 2012: Habilitation à Diriger les Recherches (HDR), University Toulouse III Paul Sabatier

« Tracing the exchange of chemical elements at the continent-ocean interface, ocean circulation and mixing using radium isotopes » ;
Committee: J. Viers, K. Cochran, M. Condomines, F. Grousset, B. Hamelin, JL. Reyss, C. Jeandel

  • 2001: phD Thesis (University Pierre et Marie Curie, Paris VI, France)

phD at Laboratoire des Sciences du Climat et de l’Environnement, Gif-sur-Yvette, France 
Supervisor : JL. Reyss ; Fellowship from the Commissariat à l’Energie Atomique (CEA)
« Use of sedimentary marine barite for the paleoceanographic studies of the Holocene period »,
Committee: A. Saliot, C. Jeandel, B. Hamelin, P. Tréguer, A. Mangini, JL. Reyss



  • University Paul Sabatier, Toulouse (All levels between Licence 1 and Master 2; 210 h per year on average)
  • Institut National Polytechnique, Toulouse (Classe Préparatoire Polytechnique)
  • University of Abomey-Calavi/ UNESCO Chair of Mathematics, Cotonou, Benin, since 2007 (30h equ. TD per y)
  • Participation to the Global Immersion Program organized by the University of Chongqing, China, July 2019; Lecture on “Climate: Past, Present and Future” (1 week)


Scientific Interests

  • Marine Geochemistry; Oceanography ; Environmental studies ; Paleoceanography
  • Use of radionuclides (U-Th series and artificial radionuclides) as geochemical tracers and dating tools
  • Radium isotopes :

226Ra & 228Ra : tracer of water masses; vertical and horizontal mixing in the ocean ; dating of marine sediments and time-scale of oceanic processes

223Ra & 224Ra : rates of submarine groundwater discharge in coastal waters; mixing in the ocean; water apparentages

227Ac : tracer of water masses; transport rates in the deep-sea, upwelling velocities

  • Other radionuclides : 210Pb, 7Be, 228Th, 234Th, 137CS, 241Am



  • Radionuclides and trace element chemistry (seawater, marine particles and sediments).
  • Low-background gamma spectrometry (LAFARA : underground laboratory settled in the French Pyrénées)
  •  Radium Delayed Coincidence Counter (RaDeCC)
  • Mass spectrometry (ICP-MS; MC-ICP-MS)
  • Oceanographic sampling techniques (large volume in situ pumps, sediment traps…)


PI of research projects

  •  PI of MED-SGD (2016-2021; French funding Agency ANR Blanc, ANR-15-CE01-0004, 2016-2019, 642 919 €) : “Submarine Groundwater Discharge: A hidden source of chemical compounds at the land-ocean interface”
  • PI of SELECT (2016-19 ; FEDER European Union/ Région Occitanie Pyrénées-Méditerranée, 1 579 103 € ; PIs : P. van Beek/ M. Souhaut) : Development of the LAFARA underground laboratory in the French Pyrénées « Sélection de matériaux « bas niveau » au laboratoire souterrain LAFARA pour la fabrication d’instruments et  d’équipements de mesure nucléaire ultra-performants » ;
  • PI of RASEDIM (NEEDS-Environnement ; 2015-2016) : « Mobilité du RAdium à l’interface eau-SEdiment dans les milieux lacustres : Déséquilibres Isotopiques et Minéralogie de la barytine »; Collaboration with IRSN  (Institut de Radioprotection et Sûreté Nucléaire) and Paris VI University.
  • PI of BARNIC (INSU, 2004-05) : Neodymium Isotopic Composition of Marine Barite as a Tracer of Past Oceanic Circulation.


Peer Review Publications

56. Léon M., van Beek P., Scholten J., Moore W., Souhaut M., DeOliveira J., Jeandel C., Seyler P., Jouanno J., Use of 223Ra and 224Ra as chronometers to estimate the residence time of Amazon waters on the Brazilian continental shelf, submitted

55. Le Roy E., van Beek P., Lacan F., Sanial V., Souhaut M., Charette M., Henderson P., The distribution of 227Ac along the GEOVIDE section, submitted

54. Rodellas V., Stieglitz T., Tamborski J., van Beek P., Andrisoa A., Cook P., Conceptual uncertainties in groundwater and porewater fluxes estimated by radon and radium mass balances, submitted to Limnology & Oceanography, in revision.

53. Mangeret A., Reyss J.-L., Seder-Colomina M., Stettena L., Morin G., Thouvenot A., Souhaut M., van Beek P., 2020. Early diagenesis of radium 226 and radium 228 in lacustrine sediments influenced by former mining sites, Journal of Environmental Radioactivity 222, 106324.

52. Tamborski J., van Beek P., Conan P., Pujo-Pay M., Odobel C., Ghiglione J.-F., Seidel J.-L., Arfib B., Diego-Feliu M., Garcia-Orellana J., Szafran A., Souhaut M., 2020. Submarine karstic springs as a source of nutrients and bioactive trace metals for the oligotrophic Northwest Mediterranean Sea, Science of the Total Environment 732, 139106,

51. Diego Feliu M., Rodellas V., Alorda-Kleinglass A., Tamborski J., van Beek P., Heins L., Bruach J.M., Arnold R., Garcia-Orellana J., 2020. Guidelines and limits for the quantification of Ra isotopes and related radionuclides with the Radium Delayed Coincidence Counter (RaDeCC). Journal of Geophysical Research: Oceans, 125, e2019JC015544.

50. Bejannin S., Tamborski J.J., van Beek P., Souhaut M., Stieglitz T., Radakovitch O., Claude C., Conan P., PujoPay M., Crispi O., Le Roy E., Estournel C., 2020. Nutrient fluxes associated with submarine groundwater discharge from karstic coastal aquifers (Côte Bleue, French Mediterranean coastline), Front. Environ. Sci. 7:205.

49. Tapia J., Audry S., van Beek P., 2019. Natural and anthropogenic controls on particulate metal(loid) deposition in Bolivian highland sediments, Lake Uru Uru (Bolivia), The Holocene 1–13,

48. El Zrelli R., Rabaoui L., van Beek P., Castet S., Souhaut M., Grégoire M., Courjault-Radé P., 2019. Natural radioactivity and radiation hazard assessment of industrial wastes from the coastal phosphate treatment plants of Gabes (Tunisia, Southern Mediterranean Sea), Marine Pollution Bulletin 146 (2019) 454–461, DOI: 10.1016/j.marpolbul.2019.06.075

47. Monnin C., Tamborski J., Bejannin S., Souhaut M., Roques M., Olivier P., van Beek P., Freshening of a Coastal Karst Aquifer Revealed by the Temporal Changes in a Spring Water Composition (La Palme, Southern France), Hydrology 2019, 6, 45; doi:10.3390/hydrology6020045.

46. Le Roy E., Sanial V., Lacan F., van Beek P., Souhaut M., Charette M.A., Henderson P.B., 2019. Insight into the measurement of dissolved 227Ac in seawater using radium delayed coincidence counter, Marine Chemistry 212, 64-73.

45. Tamborski J.J., van Beek P., Rodellas V., Monnin C., Bergsma E., Stieglitz T., Heilbrun C., Cochran J.K., Charbonnier C., Anschutz P., Bejannin S., Beck A., 2019. Temporal variability of lagoon-sea water exchange and seawater circulation through a Mediterranean barrier beach, Limnology and Oceanography 00, 1–22.

44. Tamborski J.J., Bejaninn S., Garcia-Orellana J., Souhaut M., Charbonnier C., Anschutz P., Pujo-Pay M., Conan P., Crispi O., Monnin C., Stieglitz T., Rodellas V., Andrisoa A., Claude C., van Beek P., 2018. A comparison between water circulation and terrestrially-driven dissolved silica fluxes to the Mediterranean Sea traced using radium isotopes. Geochimica et Cosmochimica Acta 238: 496-515.

43. Rodellas V., Stieglitz T. C., Andrisoa A., Cook P. G., Raimbault P., Tamborski J. J., van Beek P. and Radakovitch O., 2018. Groundwater-driven nutrient inputs to coastal lagoons: The relevance of lagoon water recirculation as a conveyor of dissolved nutrients. Science of the Total Environment 642: 764-780.

42. Grenier M., E. Garcia-Solsona, N. Lemaitre, T. W. Trull, V. Bouvier, P. Nonnotte, P. van Beek, M. Souhaut, F. Lacan, C. Jeandel, in press. Differentiating lithogenic supplies, water mass transport and biological processes on and off the Kerguelen Plateau using rare earth element concentrations and neodymium isotopic compositions, Frontiers special issue REE Marine Geochemistry in the 21st Century: A Tribute to the Pioneering Research of Henry Elderfield, 1943–2016.

41. Sarthou G., et al., 2018. Introduction to the French GEOTRACES North Atlantic transect (GA01): GEOVIDE cruise. Biogeosciences Discuss.,,, 2018.

40. El Zrelli R., Rabaoui L., Daghbouj N., Abda H., Castet S., Josse C., van Beek P., Souhaut M., Michel S., Bejaoui N. and Courjault-Rade P., 2018. Characterization of phosphate rock and phosphogypsum from Gabes phosphate fertilizer factories (SE Tunisia): high mining potential and implications for environmental protection. Environmental Science and Pollution Research 25(15): 14690-14702. 10.1007/s11356-018-1648-4.

39. Schlitzer et al., 2018. The GEOTRACES Intermediate Data Product 2017, 2017. Chemical Geology 493: 210-223.

38. Le Roy E., Sanial V., Charette M.A., van Beek P., Lacan F., Jacquet S., Henderson P.B., Souhaut M., García-Ibáñez M.I., Jeandel C., Pérez F.F., Study of the 226Ra-Ba relationship along the GA01-GEOTRACES section in the North Atlantic, submitted to Biogeosciences.

37. Bejannin S., van Beek P., Stieglitz T., Souhaut M., Tamborski J., 2017. Combining airborne thermal infrared images and radium isotopes to study submarine groundwater discharge along the French Mediterranean coastline, Journal of Hydrology : Regional studies 13, 72-90.

36. Ganachaud A, Cravatte S, Sprintall J, Germineaud C, Alberty M, Jeandel C, Eldin G., Metzl N., Bonnet S., Benavides M., Heimburger L.-E., Lefèvre J., Michael S., Resing J., Quéroué F., Sarthou G., Rodier M., Berthelot H., Baurand F., Grelet J., Hasegawa T., Kessler W., Kilepak M., Lacan F., Privat E., Send U., van Beek P., Souhaut M., Sonke J.E., 2017. The Solomon Sea: its circulation, chemistry, geochemistry and biology explored during two oceanographic cruises. Elem Sci Anth. 2017;5:33. DOI:

35. Kipp L., Sanial V., Henderson P., van Beek P., Reyss J.-L., Hammond D., Moore W., Charette M.,.Radium isotopes as tracers of hydrothermal inputs and neutrally buoyant plume dynamics in the deep ocean, Marine Chemistry, GEOTRACES Special Issue, in press.

34. Sanial V, Kipp L., Henderson P.B., van Beek P., J-L. Reyss, D.E. Hammond, Moore W.S. and Charette M.A., Radium-228 as a tracer of trace element inputs from the Peruvian continental margin, Marine Chemistry, GEOTRACES Special Issue, in press.

33. Thiebault T., Chassiot L., Fougère L., Destandau E., Simonneau A., van Beek P., Souhaut M., Chapron E., 2017, Record of pharmaceutical products in river sediments: A powerful tool to assess the environmental impact of urban management ?, Anthropocene 18, 47–56.

32. Li C., Le Roux G., Sonke J., van Beek P., Souhaut M., Van der Putten N., De Vleeschouwer F., 2017. Recent 210Pb, 137Cs and 241Am accumulation in an ombrotrophic peatland from Amsterdam Island (Southern Indian Ocean), Journal of Environmental Radioactivity 175-176, 164-199.

31. Enrico M., Le Roux G., Heimbürger L.-E., van Beek P., Souhaut M., Chmeleff J., Sonke J., 2017. Holocene atmospheric mercury levels reconstructed from peat bog mercury stable isotopes, Environmental Science and Technology 51 (11), pp 5899–5906.

30. Shelley R. U., Roca-Martí M., Castrillejo M., Sanial V., Masqué P., Landing W. M.,  van Beek P., Planquette H., Sarthou G., 2017. Quantification of trace element atmospheric deposition fluxes to the Atlantic Ocean ( > 40°N; GEOVIDE, GEOTRACES GA01) during spring 2014, Deep–Sea Research Part I 119, 34-49.

29. Masson O., Bieringer J., Brattich E., Dalheimer A., Estier S., Penev I., Ringer W., Steinkopff T., Steinmann P., Tositti L., van Beek P.,  Vismes-Ott A., 2016. Variation in airborne 134Cs, 137Cs, particulate 131I and 7Be maximum activities at high-altitude European locations after the arrival of Fukushima-labeled air masses, Journal of Environmental Radioactivity 162-163, 14-22.

28. Pham M.K., van Beek P., Carvalho F.P., Chamizo E., Degering D., Engeler C., Gascó C., Gurriaran R., Hanley O., Harms A.V., Herrmann J., Hult M., Ikeuchi Y., Ilchmann C., Kanisch G., Kis-Benedek G., Kloster M., Laubenstein M., Llaurado M., Mas J.L., Nakano M., Nielsen S.P., Osvath I., Povinec P.P., Rieth U., Schikowski J., Smedley P.A., Suplinska M., Sýkora I., Tarjan S., Varga B., Vasileva E., Zalewska T., Zhou W., 2016. Certified reference materials for radionuclides in Bikini Atoll sediment (IAEA-410) and Pacific Ocean sediment (IAEA-412), Applied Radiation and Isotopes 109. doi: 10.1016/j.apradiso.2015.11.041.

27. Cuvier A., Panza F., Pourcelot L., Foissard B., Cagnat X., Prunier J., van Beek P., Souhaut M., 2015. Le Roux G., Accumulation and sources of U decay chain daughters around a minor closed uranium mine, Journal of Environmental Radioactivity 149, 110-120.

26. Koch-Larrouy A., Atmadipoera A., van Beek P., Madec G., Aucan J., Lyard F., Grelet J., Souhaut M., 2015. Estimate of tidal mixing in the Indonesian archipelago from multidisciplinary data, Deep-Sea Research I 106, 136–153.

25. Rousseau  T.C.C., Sonke J.E., Chmeleff  J., van Beek P., Souhaut M., Boaventura G., Seyler P., Jeandel C., 2015. Rapid neodymium release to marine waters from lithogenic sediments in the Amazon estuary, Nature Communications DOI: 10.1038/ncomms8592.

24. Sanial V., van Beek P., Lansard B., Souhaut M., Kestenare E., d’Ovidio F., Blain S., 2015. Use of Ra isotopes to deduce rapid transfer of sediment-derived inputs off Kerguelen, Biogeosciences, 12, 1415-1430, doi:10.5194/bg-12-1415-2015.

23. Sanial V., van Beek P., Lansard B., d'Ovidio F. , Kestenare E., Souhaut M., Zhou M., Blain S., Study of the phytoplankton plume dynamics off the Crozet Islands (Southern Ocean): A geochemical-physical coupled approach. Submitted to Journal of Geophysical Research

22. Geibert W., Rodellas V., Annett A., van Beek P., Garcia-Orellana J., Hsieh Y.-T., Masque P., 2013. 226Ra determination via the rate of 222Rn ingrowth with the Radium Delayed Coincidence Counter (RaDeCC), Limnology and Oceanography : Methods 11, 2013, 594-603

21. Stieglitz T., van Beek P., Souhaut M., Cook P., 2013. Groundwater discharge Karstic groundwater discharge and seawater recirculation through sediments in shallow coastal Mediterranean lagoons, determined from water, salt and radon budgets, Marine Chemistry 156, 73-84

20. Hsieh, Y.-T., Geibert, W., van Beek, P., Stahl, H., Aleynik, D., and Henderson, G.M., 2013. Using the radium quartet (228Ra, 226Ra, 224Ra, and 223Ra) to estimate water mixing and radium inputs in Loch Etive, Scotland. Limnology and Oceanography 58: 1089-1102

19. Annett A., Henley S., van Beek P., Souhaut M., Ganeshram R., Venables H., Meredith M., Geibert W., 2013. Use of radium isotopes to estimate mixing rates and trace sediment inputs to surface waters in northern Marguerite Bay (Antarctic Peninsula), Antarctic Science 25(3), 445–456, doi:10.1017/S0954102012000892

18. van Beek P., Souhaut M., Lansard B., Bourquin M., Reyss J-L., Jean P., von Ballmoos P., 2013. LAFARA : A new underground laboratory in the French Pyrénées for low-background gamma spectrometry, Journal of Environmental Radioactivity 116, 152-158

17. Subetto D.A., Shevchenko V.P., Ludikova A.V., Kuznetsov D.D., Sapelko T.V., Lisitsyn A.P., Evzerov V.Y., van Beek P., Souhaut M., Subetto G.D., 2013. Chronology of isolation of the Solovetskii archipelago lakes and current rates of lake sedimentation, Doklady Earth Sciences DOI:10.1134/S1028334X12090140

16. Evrard O., van Beek P., Gateuille D., Pont V., Lefèvre I., Lansard B., P. Bonté, 2012. Evidence of the radioactive fallout in France due to the Fukushima nuclear accident, Journal of Environmental Radioactivity 114, Volume spécial Fukushima, 54-60

15. Venchiarutti C., Roy-Barman M., Freydier R., van Beek P., Souhaut M., Jeandel C., 2011. Influence of intense scavenging on Pa-Th fractionation in the wake of Kerguelen Island (Southern Ocean), Biogeosciences 8, 3187–3201

14. Bourquin M., van Beek P., Reyss J.L., Riotte J. and Freydier R., 2011. Determination of 226Ra concentrations in seawater and suspended particles (NW Pacific) using MC-ICP-MS, Marine Chemistry 126, 132–138

13. Jeandel C., Venchiarutti C., Bourquin M., Pradoux C. Lacan F., van Beek P., Riotte, J., 2011. Single Column Sequential Extraction of Ra, Nd, Th, Pa and U from a Natural Sample, Geostandards and Geoanalytical Research, doi: 10.1111/j.1751-908X.2010.00087.x

12. van Beek P., Souhaut M., Reyss J-L., 2010. Measuring the radium quartet (226Ra, 228Ra, 224Ra, 223Ra) in water samples using gamma spectrometry, Journal of Environmental Radioactivity, 101, 521–529

11. van Beek P., Sternberg E., Reyss J.-L., Souhaut M., Robin, E., Jeandel C., 2009. 228Ra/226Ra and 226Ra/Ba ratios in the Western Mediterranean Sea: Barite formation and transport in the water column, Geochimica Cosmochimica Acta 73, 4720–4737

10. Bourquin M., van Beek P., Reyss J-L., Souhaut M., Charette M., Jeandel C., 2008. Testing methods to separate radium from large volumes of seawater, Marine Chemistry, 109, 226-237

9. van Beek P., Bourquin M., Reyss J-L., Souhaut M., M. Charrette, Jeandel C., 2008. Radium isotopes to investigate the water mass pathways on the Kerguelen plateau, Southern Ocean, Deep-Sea Research Part II-Topical Studies in Oceanography, 55, 622-637

8. Blain S., B. Quéguiner, L. Armand, S. Belviso, B. Bombled, L. Bopp, A. Bowie, C. Brunet, C. Brussaard, F. Carlotti, U. Christaki, A. Corbière, I. Durand, F. Ebersbach, J-L. Fuda, N. Garcia, L. Gerringa, B. Griffiths, C. Guigue, C. Guillerm, S. Jacquet, C. Jeandel, P. Laan, D. Lefèvre, C. Lo Monaco, A. Malits, J. Mosseri, I. Obernosterer, Y-H. Park, M. Picheral, P. Pondaven, T. Remenyi, V. Sandroni, G. Sarthou, N. Savoye, L. Scouarnec, M. Souhaut, D. Thuiller, K. Timmermans, T. Trull, J. Uitz, P. van Beek, M. Veldhuis, D. Vincent, E. Viollier, L. Vong, T. Wagener, 2007. Effect of natural iron fertilization on carbon sequestration in the Southern Ocean, Nature 446, 1070 – 1074

7. van Beek P., François R., Conte M., Reyss J.-L., Souhaut M., Charette M., 2007. 228Raex/226Raex and 226Raex/Ba ratios to track barite formation and transport in the water column, Geochimica Cosmochimica Acta 71, 71-86

6. van Beek P., Reyss J-L., DeMaster D., Paterne M., 2004. 226Ra-in marine barite : Relationship with carbonate dissolution and sediment focusing in the equatorial Pacific, Deep-Sea Research I 51, 235-261

5. Robin E, Rabouille C, Martinez G, Lefevre I, Reyss J-L, van Beek P, Jeandel C, 2003. Direct bio-Ba determination using SEM/EDS-ACC system : implication for barite preservation in marine sediments, Marine Chemistry 82 (3-4), 289-306.

4. van Beek P., Reyss J.-L., Bonte P., Schmidt S., 2003. Sr/Ba in barite : a proxy of barite preservation in marine sediments ?, Marine Geology 199, 205-220

3. Schmidt S, van Weering T.C.E., Reyss J-L & van Beek P, 2002. Rapid deposition and reworking at the sea bed/ water interface over the NW Iberian Margin; seasonal and spatial trends, Progress in Oceanography 52, 331-348

2. van Beek P, Reyss J-L, Gersonde R, Paterne M, Rutgers van der Loeff M, Kuhn G, 2002. 226Ra in barite : Absolute dating of Holocene Southern Ocean sediments and reconstruction of sea-surface reservoir ages, Geology 30 (8), 731-734

1. van Beek P, Reyss J-L, 2001. 226Ra in marine barite : new constraints on supported 226Ra, Earth and Planetary Science Letters 187, 147-161


Other :


Participation to the GEOTRACES intercalibration exercise (Radium isotopes)

Charette M., Dulaiova H., Gonneea M., Henderson P., Moore W., Scholten J., Pham M., 2012. GEOTRACES radium isotopes interlaboratory comparison experiment, Limnology and Oceanography : Methods 10, 2012, 451-463


Book chapter

C. Jeandel, P. van Beek, F. Lacan, Les éléments chimiques et isotopes, traceurs des échanges Terre-Mer. Collection Mer & Océan, vol.1, ch.5, p:181-208   


Training of students

Supervisor of 5 phD Thesis:

  • Morgane Léon (2020-): Study of the radium isotopes along oceanic sections (GEOTRACES program)
  • Emilie Le Roy (2016-2018) : Distribution of radionuclides along the French GEOTRACES section in the North Atlantic (GEOVIDE project); co-supervision François Lacan
  • Simon Bejannin (2016-2018) : Study of Submarine Groundwater Discharge along the French Mediterranean coastline (MED-SGD Project)
  • Virginie Sanial (2012-2015) : Study of the natural iron fertilization off the Kerguelen and Crozet Islands (Southern Ocean), KEOPS-2 project/ GEOTRACES; now lecturer at the university of Toulon (MIO), France
  • Michael Bourquin (2009-2012): Study of the natural iron fertilization off the Kerguelen Islands (Southern Ocean), KEOPS-1 project/ GEOTRACES


Advisor of 4 postdoctoral Fellows :

  • Bruno Lansard, 1 year (CNRS; KEOPS-2 project), now lecturer at LSCE, Gif-sur-Yvette
  • Joseph Tamborski, 2 years (FEDER LAFARA/ MED-SGD project), now lecturer at ODU, USA
  • Thomas Zambardi, 2 years (FEDER LAFARA), now engineer at LAFARA
  • Mélanie Grenier (MED-SGD), ongoing, 2020-21


Training of 25 graduate/undergraduate students

phD Thesis/ HDR committee

- Reviewer of HDR manuscript
Dr Laurent Coppola, 2018, « Relation entre les forçages physiques et la dynamique de l’oxygène dissous en Méditerranée », HDR soutenue le 6 décembre 2018, Villefranche-sur-Mer.

Dr d’Edwige Pons-Branchu, 2015, « Contribution à l’étude des chronomètres par déséquilibre dans la famille de l’uranium et leur application pour l’étude de l’évolution des paysages, du climat et de l’anthropocène », HDR soutenue le 1 décembre 2015, Gif-sur-Yvette.


- Reviewer of phD Thesis manuscript
Pierre-Emmanuel Oms, 2019, « Transferts muti-échelles des apports continentaux dans le golfe de Gascogne », directeurs de thèse : Pascal Bailly du Bois et Franck Dumas, Thèse soutenue à Brest le 19 juin 2019

Giada Trezzi, 2016 , « Assessing the significance of submarine groundwater discharge as a source of trace metals to the Mediterranean Sea », directeur de thèse : J. Garcia-Orellana et Pere Masqué, Universitat Autònoma de Barcelona, Thèse soutenue à Barcelone le 29 juin 2016

Sabine Cockenpot, 2015, « Caractérisation des processus aux interfaces air-eau et sédiment-eau pour la quantification des apports d’eaux souterraines par le radium et le radon», Université d’Aix-Marseille, directeurs: O. Radakovitch et C. Claude, CEREGE, Thèse soutenue le 09 juillet 2015

Céline Charbonnier, 2013, « Biogéochimie et hydrologie d'une plage battue : la plage du Truc Vert - Flux de matière dans les sédiments sableux intertidaux », Université de Bordeaux, directeurs: P. Anschutz et P. Lecroart, EPOC, Thèse soutenue le 22 novembre 2013

- President of phD thesis committee
Marine David, 2019, « Influence des apports d'eaux souterraines sur le fonctionnement hydrologique et biogéochimique des lagunes méditerranéennes - Cas de la lagune de l'Or », Ecole Doctorale GAIA - Biodiversité, Agriculture, Alimentation, Environnement, Terre, Eau, directeurs : A. Fiandrino et T. Stieglitz, Thèse soutenue le 26 novembre 2019, Ifremer Sète.

Sofia El Meknassi, 2019, « Enregistrement des isotopes du Sr dans les coquilles et l'eau de mer côtière: réévaluation multi-échelles du cycle du Sr pour des implications paléoenvironnementales et chimiostratigraphiques », Université Toulouse III Paul Sabatier, directeurs: G. Dera, V. Chavagnac, M. De rafelis, Thèse soutenue le 15 novembre 2019, OMP Toulouse.

Guillaume Mikolajczak, 2019, « Dynamique de l'eau et des apports particulaires originaires du Rhône sur la marge continentale du Golfe du Lion » Université Toulouse III Paul Sabatier, Directeurs de thèse : Claude Estournel et Caroline Ulses, Thèse soutenue le 9 mai 2019, OMP Toulouse.

Aladin Danoary Andrisoa, 2019, « Ecological impacts of groundwater discharge to Mediterraean coastal lagoons », Université Aix-Marseille, Directeurs de thèse: Thomas Stieglitz et Patrick Raimbault, Thèse soutenue le 26 mars 2019, CEREGE, Aix-en-Provence.

Marine Bretagnon, 2018, « Inférence de l’activité biogéochimique dans la zone de minimum d’oxygène du Pérou », Université Toulouse III Paul Sabatier, Directeurs de thèse : A. Paulmier, V. Garçon, Thèse soutenue le 1er octobre 2018, OMP Toulouse.

Hind Oubanas, 2018, « Variational assimilation of satellite data into a full Saint-Venant based hydraulic model in the context of ungauged basins », Université Toulouse III Paul Sabatier, Directeurs de thèse : P.O. Malaterre, I. Gejadze, F. Mercier, Thèse soutenue le 31 janvier 2018, CLS Toulouse.

Lucie Bordois, 2015, « Modélisation numérique de la marée interne : contrôles hydrauliques et topographiques », Université Toulouse III Paul Sabatier, Directeurs de thèse: F. Auclair et A. Paci, Thèse soutenue le 06 octobre 2015, OMP Toulouse.

Adrien Claustres, 2015, « Répartition des éléments traces potentiellement toxiques dans les zones de montagne : Rôle et part des facteurs naturels et anthropiques à l'échelle des temps pédologiques », Université Toulouse III Paul Sabatier, directeurs: G. Le Roux et A. Probst, Thèse soutenue le 08 janvier 2015, OMP Toulouse.


Experience at Sea (268 days at sea)

  • 2021 : 62 days on RV Marion Dufresne; GEOTRACES GS02 section in the Southern Ocean, Indian sectorSWINGS project
  • 2011 : 53 days on RV Marion Dufresne; KEOPS-2 cruise off Kerguelen Islands; water sampling, suspended matter sampling using large volume in situ pumps; analysis at sea of short half-life Ra isotopes.
  • 2010 : 13 jours sur le RV Marion Dufresne ; échantillonnage d’eau de mer au large de l’Indonésie (projet INDOMIX) : étude du mélange dans l’océan par les isotopes du radium (223Ra, 224Ra, 226Ra, 228Ra) et l’227Ac
  • 2008 : 10 days as Chief Scientist on RV ANTEA (IRD); Sampling of the Amazon river, off French Guyana; analysis of radium isotopes (223Ra, 224Ra, 226Ra, 228Ra); AMANDES project.
  • 2007 : 12 days on RV ANTEA (IRD); Sampling of the Amazon river, off French Guyana; analysis of radium isotopes (223Ra, 224Ra, 226Ra, 228Ra); AMANDES project
  • 2006 : 1 day on RV MINIBEX (COMEX); sampling in the Golfe of Lion; analysis of radium isotopes (223Ra, 224Ra, 226Ra, 228Ra) : intercomparison study LEGOS/LSCE/CEREGE
  • 2005 : 45 days on RV Marion Dufresne; KEOPS cruise off Kerguelen Islands (chief scientists : Bernard Quéguiner, Stéphane Blain); water sampling, suspended matter sampling using large volume in situ pumps; analysis at sea of short half-life Ra isotopes.
  • 2003 : 2 days on Théthys II (Dyfamed Time-Series; BARMED project) as chief scientist; water sampling, suspended matter sampling using large volume in situ pumps
  • 2003 : 2 Field trips on Loch Etive, Scotland; water sampling
  • 2002 : 30 days on R.V. Mirai (JPAC, north west Pacific, Alaska-Japan; chief scientists : Susumu Honjo & Makio Honda), water sampling, suspended matter sampling using large volume in situ pumps, mooring deployment
  • 2002 : 4 days on the R.V. KOK and 4 days on R.V. Wecoma (HOT Time series, Hawaii; chief scientist : Mike Bacon), water sampling, suspended matter sampling using large volume in situ pumps
  • 2002 : 5 days on the R.V. Weatherbird II (OFP time series, Bermuda; Chief scientist : Maureen Conte), water sampling, suspended matter sampling using large volume in situ pumps, mooring deployment
  • 2000 : 66 days on board of Polarstern, Germany (Cape Town – Antarctica - Cape Town; chief scientist : Gerd Kuhn)), coring
  • 1996 : 21 days on board of R.V. Pelagia, The Netherlands, along the spanish coast (Vigo-Texel, OMEX program; chief scientist : Tjeerd van Weering); Water sampling for 234Th, 228Ra and 226Ra measurements and coring


Other Projects

  • SWINGS (French contribution to the GEOTRACES program), 2019-2023 (PIs: Hélène Planquette; Catherine Jeandel), GEOTRACES GS02 section in the Indian sector of the Southern Ocean
  • GEOVIDE (French contribution to the GEOTRACES program), 2014-16 (PIs: Géraldine Sarthou and Pascal Lherminier), section in the North Atlantic
  • KEOPS-2, ANR-LEFE 2011-2013 (PI: S. Blain), KErguelen compared study of the Ocean and the Plateau in Surface water 2
  • SOLWARA, ANR-LEFE (PI: S. Cravatte, A. Ganachaud)
  • RTRA CYMENT, SGD along the French Mediterranean coastline
  • AMANDES, ANR Blanc 2006-2008 (PI : C. Jeandel, P. Seyler) : Weathering and transport of elements at a crucial land-sea interface (Amazone estuary)
  • TARDHOL, EVE (PI : X. Crosta) : Variabilité climatique récente des hautes latitudes nord et sud : Focus sur le Tardi-Holocène et téléconnections inter-hémisphériques
  • KEOPS, PROOF/CYBER 2005-2007 (PI: S. Blain), KErguelen compared study of the Ocean and the Plateau in Surface water
  • BARMED, PROOF, Mediterranean Sea, 2003-2006 (PI: C. Jeandel)
  • JPAC, North West Pacific, 2001-2011 (PIs: S. Honjo, M. Honda, R. François)


Convener at international conferences

  •  Co-Convener, session “Hydrogeology of coastal zones: processes, consequences and potentials”, HS8.2.5, EGU, European Geophysical Union 7-12 April 2019, Vienna, Austria
  • Co-Convener, session “Hydrogeology of coastal zones: processes, consequences and potentials”, HS8.2.5, EGU, European Geophysical Union, EGU, April 2017, Vienna, Austria
  • Co-Convener, session “Submarine and Sublacustrine Groundwater Discharge”, HS8.2.7, EGU, European Geophysical Union April 2015, Vienna, Austria
  • Member of the scientific committee of the International Ra-Rn meeting in Girona, Spain, July 2016

International collaboration

Matt Charette, WHOI, USA ; Kirk Cochran, Stony Brook University, USA; Walter Geibert, AWI, Germany; Jordi Garcia-Orellana, UAB, Spain; G. Chaillou, ISMER, Québec; Jan Scholten, Univ. Kiel, Germany; Amber Annett, NOC, UK; Pinghe Cai, Xiamen University, China

Invited professor at LEGOS:

  •  Kirk Cochran, Stony Brook University, USA : Invited Professor, June 2017
  • Thomas Stieglitz, JCU Australia : Poste Rouge OMP April-July 2009; Poste Rouge OMP May-July 2015
  • Walter Geibert, Univ. Edinburg : PHC-Alliance 2009 (8 in days in Toulouse)
  • Joselene De Oliveira, IPEN, Sao Paulo, Brazil : IAEA funding 2007 (15 days in Toulouse)



Geology; Geochimica et Cosmochimica Acta; Deep-Sea Research; Nuclear Instruments & Methods in Physics Research; Geophysical Research Letters; Global Biogeochemical Cycles; Continental Shelf Research; Chemical Geology; NSF, ANR, INSU, SCOR, Swiss National Foundation, Commission Flotte, NERC, ERC etc…

Oral presentations (recent)

van Beek P., 2020. Use of radionuclides as tracers to study the ocean, 19 November 2020. Seminar/ Webinar at UCL, University College London, UK.

van Beek P., 2018. Ocean tracers studies. JOINT EC-JRC/IAEA WORKSHOP ON LOW-LEVEL RADIOACTIVITY MEASUREMENTS AND APPLICATIONS (JEILORA), 5–7 December 2018, IAEA Environment Laboratories, Monaco.

van Beek P. et al., 2018. Presentation of the LAFARA underground laboratory in the French Pyrénées, RadiumRadon International meeting, 7th International workshop, July 2018, Delmenhorst, Germany.

Diffusion of the scientific knowledge

Participations to Science en fête
Active Member of « Les Etoiles Brillent pour Tous » (

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