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OCEANIS > Bruno LANSARD (english)

Bruno LANSARD (english)

Équipe OCEANIS CEA – Orme des Merisiers, Bât. 714, pièce 007

Tél. : +33 (0)1.69.08.00.87
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Assistant Professor at Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)

37ème section du CNU : Ocean biogeochemistry and climate change

Research topics

  • Carbon cycle at coastal interfaces, marine biogeochemistry and early diagenesis
  • Carbonate chemistry at the water-sediment interface and in the Arctic Ocean
  • Use of in situ micro-sensors and isotopic and radiogenic tracers

Ph.D. and postdoc positions

  • 2011-12: Postdoc CNRS: “Freshwater input from groundwater in the Mediterranean and age of water masses on the Kerguelen Islands plateau: Radium isotope applications”, LEGOS, Toulouse.
  • 2008-10: Postdoc CRSNG, “Carbonate chemistry in the Arctic Ocean”, Department of Earth & Planetary Sciences, McGill University and GEOTOP. Montréal, Canada.
  • 2004-07: Postdoc CNRS: “Integrating new technologies for the study of benthic ecosystem response to human activity: toward a Coastal Ocean Benthic Observatory”, LSCE, Gif-sur-Yvette.
  • 2001-04: Ph.D. in Marine Biogeochemistry de l’Université d’Aix-Marseille II. Distribution and remobilisation of plutonium in the sediments of the Rhône prodelta (north-western Mediterranean), Aix-Marseille University, Marseille.

Scientific publications

  1. Nmor S., Viollier E., Pastor L., Lansard B. and Rabouille C. (2025). Biogeochemical implication of massive episodic flood deposition: Model-Data integration. Journal of Geophysical Research: Oceans, 130 (6). https://doi.org/10.1029/2025JC022414
  2. Ferreira E., Lansard B., Monvoisin G., Magette E., Boever A. Bridgham H., Bombled B., Beckler J.-S., Taillefert M. and Rabouille C. Benthic biogeochemical reactions and fluxes in the hypoxic and acidified northern Gulf of Mexico (nGoM), part I: carbonate dissolution from in situ microprofiles (2025). Marine Chemistry, 270: 104515. https://doi.org/10.1016/j.marchem.2025.104515
  3. Metzl N., Fin J., Lo Monaco C., Mignon C., Alliouane S., Bombled B., Boutin J., Bozec Y., Comeau S., Conan P., Coppola L., Cuet P., Ferreira E., Gattuso J.P., Gazeau F., Goyet C., Grossteffan E., Lansard B, Lefèvre D., Lefèvre N., Leseurre C., Petton S., Pujo-Pay M., Rabouille C., Reverdin G., Ridame C., Rimmelin-Maury P., Ternon J. F., Touratier F., Tribollet A., Wagener T., and Wimart-Rousseau C. (2025), An updated synthesis of ocean total alkalinity and dissolved inorganic carbon measurements from 1993 to 2023: the SNAPO-CO2-v2 dataset, Earth System Science Data, 17(3), https://doi.org/10.5194/essd-17-1075-2025
  4. Ferreira E., Nmor S., Viollier E., Lansard B, Bombled B., Regnier E., Monvoisin G., Grenz C., van Beek P., and Rabouille C. (2024), Characterization of the benthic biogeochemical dynamics after flood events in the Rhône River prodelta: A data–model approach, Biogeosciences, 21(3), 711-729. https://doi.org/10.5194/bg-21-711-2024
  5. Metzl N., Fin J., Lo Monaco C., Mignon C., Alliouane S., Antoine D., Bourdin G., Boutin J., Bozec Y., Conan P., Coppola L., Diaz F., Douville E., Durrieu de Madron X., Gattuso J.-P., Gazeau F., Golbol M., Lansard B, Lefèvre D., Lefèvre N., Lombard F., Louanchi F., Merlivat L., Olivier L., Petrenko A., Petton S., Pujo-Pay M., Rabouille C., Reverdin G., Ridame C., Tribollet A., Vellucci V., Wagener T., and Wimart-Rousseau C. (2024), A synthesis of ocean total alkalinity and dissolved inorganic carbon measurements from 1993 to 2022: the SNAPO-CO2-v1 dataset, Earth System Science Data, 16(1), https://doi.org/10.5194/essd-16-89-2024
  6. Vivier, F., Lourenço, A., Skogseth, R., Goszczko, I., Michel, E., Rousset, C., Bouruet-Aubertot, P., Cuypers, Y., Lansard, B., and Waelbroeck, C. (2024), Dense water production in Storfjorden, Svalbard, from a 1-year time series of observations and a simple model: Are polynyas in a warming Arctic exporting heat to the deep ocean?, Journal of Geophysical Research: Oceans, 129(10), e2024JC020878. https://doi.org/10.1029/2024JC020878
  7. Vivier F., Lourenço A., Michel E., Skogseth R., Rousset C., Lansard B., Bouruet-Aubertot P., Boutin, J., Bombled B., Cuypers Y., Crispi O., Dausse D., Le Goff H., Madec G., Vancoppenolle M., Van der Linden F., and Waelbroeck, C. (2023), Summer hydrography and circulation in Storfjorden, Svalbard, following a record low winter sea-ice extent in the Barents Sea, Journal of Geophysical Research: Oceans, 128(2), e2022JC018648, https://doi.org/10.1029/2022JC018648
  8. Dumoulin J.-P., Rabouille C., Pourtout S., Bombled B., Lansard B., Caffy I., Hain S., Perron M., Sieudat M., Thellier B., Delqué-Koli? E., Moreau C., and Beck L. (soumis à Radiocarbon, le 20/12/21). Identification in pore waters of recycled sediment organic matter using the dual isotopic composition of carbon (δ13C and Δ14C): New data from the continental shelf influenced by the Rhône River. Radiocarbon, https://doi.org/10.1017/RDC.2022.71
  9. Nmor S., Viollier E., Pastor L., Lansard, B., Rabouille C. and Soetaert K. (2022). FESDIA (v1.0): Exploring temporal variations of sediment biogeochemistry under the influence of flood events using numerical modelling, Geoscientific Model Development, https://doi.org/10.5194/gmd-2022-84
  10. Rabouille C., Lansard B., Owings S.M., Rabalais N.N., Bombled B., Metzger E., Richirt J., Eitel E.M., Boever A., Beckler J., and Taillefert M. (2021). Early diagenesis in the hypoxic and acidified zone of the northern Gulf of Mexico: is organic matter recycling in sediments disconnected from the water column? Frontiers in Marine Science, 8(199). https://doi.org/10.3389/fmars.2021.604330
  11. Massicotte P., et al., (2021) The Malina oceanographic expedition: How do changes in ice cover, permafrost and UV radiation impact biodiversity and biogeochemical fluxes in the Arctic Ocean? Earth System Science Data. https://essd.copernicus.org/preprints/essd-2020-252/
  12. Ait Ballagh, F. E., Rabouille, C., Andrieux-Loyer, F., Soetaert, K., Lansard, B., Bombled, B., Monvoisin, G., Elkalay, K., and Khalil, K. (2021), Spatial Variability of Organic Matter and Phosphorus Cycling in Rhône River Prodelta Sediments (NW Mediterranean Sea, France): a Model-Data Approach, Estuaries and Coasts. https://doi.org/10.1007/s12237-020-00889-9
  13. Owings, S.M., L. Bréthous, E.M. Eitel, B.P. Fields, A. Boever, J.S. Beckler, B. Bombled, B. Lansard, E. Metzger, C. Rabouille, and M. Taillefert (2021). Differential manganese and iron recycling and transport in continental margin sediments of the Northern Gulf of Mexico, Marine Chemistry, 229, 103908. https://doi.org/10.1016/j.marchem.2020.103908
  14. Fossile E., Nardelli M.P., Jouini A., Lansard B., Pusceddu A., Moccia D., Michel E., Péron O., Howa H., and M. Mojtahid (2020). Benthic foraminifera as tracers of brine production in Storfjorden “sea ice factory”, Biogeosciences, 17, 1933–1953, 2020, https://doi.org/10.5194/bg-17-1933-2020
  15. Rassmann J., Eitel E., Cathalot C., Brandily C., Lansard B., Taillefert M., and C. Rabouille (2020). Benthic alkalinity and dissolved inorganic carbon fluxes in the Rhône River prodelta generated by decoupled aerobic and anaerobic processes, Biogeosciences, 17, 13-33. https://doi.org/10.5194/bg-17-13-2020
  16. Ehn, J.K., Reynolds R.A., Stramski D., Doxaran D., Lansard, B., and M. Babin (2019). Patterns of suspended particulate matter across the continental margin in the Canadian Beaufort Sea during summer, Biogeosciences, 16, 1583-1605. https://doi.org/10.5194/bg-16-1583-2019
  17. Rassmann J., Lansard B., Gazeau F., Guidi-Guilvard L., Pozzato L., Alliouane S., Grenz C., and C. Rabouille (2018). Impact of ocean acidification on the biogeochemistry and meiofaunal assemblage of carbonate-rich sediments: Results from core incubations (Bay of Villefranche, Mediterranean Sea), Marine Chemistry, 203: 112-119. https://doi.org/10.1016/j.marchem.2018.05.006
  18. Pozzato L., Rassmann J., Lansard B., Dumoulin J.-P., van Breugel P., and C. Rabouille (2018). Origin of remineralized organic matter in sediments from the Rhone River prodelta (NW Mediterranean) traced by Δ14C and δ13C signatures of pore water DIC. Progress in Oceanography, 163: 112-122. https://doi.org/10.1016/j.pocean.2017.05.008
  19. Mucci A., Levasseur M., Gratton Y., Martias C., Scarratt M., Gilbert D., Tremblay J.-É., Ferreyra G., and B. Lansard (2018). Tidally-induced variations of pH at the head of the Laurentian Channel, Canadian Journal of Fisheries and Aquatic Sciences, 75 (7): 1128-1141. https://doi.org/10.1139/cjfas-2017-0007
  20. Rassmann J., Lansard B., Pozzato L., and C. Rabouille (2016). Carbonate chemistry in sediment pore waters of the Rhône River delta driven by early diagenesis (NW Mediterranean), Biogeosciences, 13: 5379-5394. https://doi.org/10.5194/bg-13-5379-2016
  21. Varela D., Brzezinski M., Beucher C., Jones J., Giesbrecht K., Lansard B., and A. Mucci (2016). Heavy silicon isotopic composition of silicic acid and biogenic silica in Arctic waters over the Beaufort shelf and the Canada Basin, Global Biogeochemical Cycles, 30: 804-824. https://doi:10.1002/2015GB005277
  22. Sanial V., van Beek P., Lansard B., Souhaut M., Kestenare E., d’Ovidio F., Zhou M., and S. Blain (2015). Use of Ra isotopes to deduce rapid transfer of sediment-derived inputs off Kerguelen, Biogeosciences, 12: 14015-14030. https://doi.org/10.5194/bg-12-1415-2015
  23. Tremblay J.-É., Raimbault P., Garcia N., Lansard B., Babin M., and J. Gagnon (2014). Impact of river discharge, upwelling and vertical mixing on the nutrient loading and productivity of the Canadian Beaufort Shelf. Biogeosciences, 11: 4853-4868. https://doi.org/10.5194/bg-11-4853-2014
  24. Sanial V., van Beek P., Lansard B., d’Ovidio F., Kestenare E., Souhaut M., Zhou M., and S. Blain (2014). Study of the phytoplankton plume dynamics off the Crozet Islands (Southern Ocean): A geochemical-physical coupled approach. Journal of Geophysical Research: Oceans, 119 (4): 2227-2237. https://doi.org/10.1002/2013JC009305
  25. Forest A., Coupel P., Else B., Nahavandian S., Lansard B., Raimbault P., Papakyriakou T.N., Gratton Y., Fortier L., Tremblay J.-É., and M. Babin (2014). Synoptic evaluation of carbon cycling in Beaufort Sea during summer: contrasting river inputs, ecosystem metabolism and air-sea CO2 fluxes. Biogeosciences, 11: 2827-2856. https://doi.org/10.5194/bg-11-2827-2014
  26. Else B., Galley R.J., Lansard B., Barber D.G., Brown K., Miller L.A., Mucci A., Papakyriakou T.N., Tremblay J.-É., and S. Rysgaard (2013), Further observations of a decreasing atmospheric CO2 uptake capacity in the Canada Basin (Arctic Ocean) due to sea ice loss, Geophysical Research Letters, 40 (6): 1132-1137. https://doi.org/10.1002/grl.50268
  27. Cathalot C., Rabouille C., Tisnérat-Laborde N., Toussaint F., Kerhervé P., Buscail R., Loftis K., Sun M.-Y., Tronczynski J., Azoury S., Lansard B., Treignier C., Pastor L., and S. Tesi (2013). The fate of river organic carbon in coastal areas: a study in the Rhône River delta using multiple isotopic (δ 13C, Δ 14C) and organic tracers. Geochimica et Cosmochimica Acta, 118: 33-55. https://doi.org/10.1016/j.gca.2013.05.001
  28. van Beek P., Souhaut M., Lansard B., Bourquin M., Reyss J.-L., von Ballmoos P., and P. Jean (2013). LAFARA: a new underground laboratory in the French Pyrénées for ultra-low-level gamma-ray spectrometry. Journal of Environmental Radioactivity, 116: 152-158. https://doi.org/10.1016/j.jenvrad.2012.10.002
  29. Magen C., Lansard B. and S. Crowe (2012). Preface to Bjørn Sundby’s Special Issue of Aquatic Geochemistry. Aquatic Geochemistry, 18 (6): 457-460. https://doi.org/10.1007/s10498-012-9182-3
  30. Papakyriakou T.N., Carnat G., Chierici M., Delille B., Else B., Fransson A., Geilfus N.-X, Lansard B., Miller L., Mucci A., Shadwick E., Thomas H. and J.-L. Tison (2012). Air-sea CO2 exchange and carbon source/sink dynamics in the Southeast Beaufort Sea. In “On the Edge: From Knowledge to Action during the Fourth International Polar Year, Circumpolar Flaw Lead Study (2007-2008)”: 109-122.
  31. Cathalot C., Lansard B., Hall P.O.J., Tengberg A., Almroth-Rosell E., Apler A., Calder L., Bell E., and C. Rabouille (2012). Influence of a fish farm on oxygen sediment uptake rates in the Loch Creran (Scotland). Aquatic Geochemistry, 18 (6): 515-541. https://doi.org/10.1007/s10498-012-9181-4
  32. Evrard O., van Beek P., Gateuille D., Pont V., Lefèvre I., Lansard B., and P. Bonté (2012). Evidence of the radioactive fallout in France due to the Fukushima nuclear accident. Journal of Environmental Radioactivity, 114: 54-60. https://doi.org/10.1016/j.jenvrad.2012.01.024
  33. Lansard B., Mucci A., Miller L.A., Macdonald R.W., and Y. Gratton (2012). Variability of water mass distribution in the southeastern Beaufort Sea determined by total alkalinity and δ18O data. Journal of Geophysical Research, 117: C03003. https://doi.org/10.1029/2011JC007299
  34. Chierici M., Fransson A., Lansard B., Miller L.A., Mucci A., Shadwick E., Thomas H., Tremblay J.-E., and T.N. Papakyriakou (2011). Impact of biogeochemical processes and environmental factors on the calcium carbonate saturation state in the Circumpolar Flaw Lead in the Amundsen Gulf, Arctic Ocean. Journal of Geophysical research, 116: C00G09. https://doi.org/10.1029/2011JC007184
  35. Thomas .H, Shadwick E., Dehairs F., Lansard B., Mucci A., Navez J., Gratton Y., Prowe F., Chierici M., Fransson A., Papakyriakou T.N., Sternberg E., Miller L., Tremblay J.-É., and C. Monin (2011). Barium and carbon fluxes in the Canadian Arctic Archipelago. Journal of Geophysical research, 116: C00G08. https://doi.org/10.1029/2011JC007120
  36. Goineau A., Fontanier C., Jorissen F., Lansard B., Buscail R., Mouret A., Kerhervé P., Zaragosi S., Ernoult E., Artéro C., Anschutz P., Metzger E., and C. Rabouille (2011) Live (stained) benthic foraminifera from the Rhône prodelta (Gulf of Lion, NW Mediterranean): Environmental controls on a river-dominated shelf. Journal of Sea Research, 65 (1): 58-75. https://doi.org/10.1016/j.seares.2010.07.007
  37. Mucci A., Lansard B., Miller L.A., and T.N. Papakyriakou (2010). CO2 fluxes across the air-sea interface in the southeastern Beaufort Sea: the ice-free period. Journal of Geophysical Research. 115, C04003. https://doi.org/10.1029/2009JC005330
  38. Mojtahid M., Jorissen F., Lansard B., and C. Fontanier (2010). Microhabitat selection of benthic foraminifera in sediments off the Rhône River mouth (NW Mediterranean), The Journal of Foraminiferal Research, 40 (3): 231-246. https://doi.org/10.2113/gsjfr.40.3.231
  39. Rabouille C., Caprais J.-C., Lansard B., Crassous P., Dedieu K., Reyss J.-L., and A. Khripounoff (2009). In situ measurements of sediment oxygen consumption and organic matter budget in the Southeast Atlantic continental margin close to the Congo Canyon. Deep-Sea Research part I, 56 (23): 2223-2238. https://doi.org/10.1016/j.dsr2.2009.04.005
  40. Lansard B., Rabouille C., Grenz C., and L. Denis (2009). Benthic remineralization at the land-ocean interface: A case study of the Rhône River, Gulf of Lions. Estuarine Coastal and Shelf Science, 81 (4): 544-554. https://doi.org/10.1016/j.ecss.2008.11.025
  41. Mojtahid M., Jorissen F., Lansard B., Fontanier C., Bombled B., and C. Rabouille (2009). Spatial distribution of live benthic foraminifera in the Rhône prodelta: Faunal response to a continental-marine organic matter gradient. Marine Micropaleontology, 70: 177-200. https://doi.org/10.1016/j.marmicro.2008.12.006
  42. Lansard B., Rabouille C., Denis L., and C. Grenz (2008). In situ oxygen uptake rates by sediment under the influence of the Rhône River. Continental Shelf Research, 28: 1501-1510. https://doi.org/10.1016/j.csr.2007.10.010
  43. Rabouille C., Conley D., Dai M., Cai W.-J., Chen C., Lansard B., Green R., Yin K., Harrison P., Dagg M., and B. McKee (2008). Comparison of hypoxia among four river-coastal systems, the Changjiang (Yangtze River), Mississippi, Pearl River and Rhône. Continental Shelf Research, 28: 1527-1537. https://doi.org/10.1016/j.csr.2008.01.020
  44. Soltwedel T., Lansard B., Gilbert F., Hasemann C., Bell E., Sablotny B., Eagle M., Kershaw P., and C. Rabouille (2008). An “Integrated Sediment Disturber” (ISD) to study the impact of repeated physical perturbations on sediment geochemistry and the small benthic biota. Limnology and Oceanography Methods, 6: 307-318. https://doi.org/10.4319/lom.2008.6.307
  45. Fontanier C., Jorissen F.J., Lansard B., Mouret A., Buscail R., Schmidt S., Kerhervé P., Buron F., Zaragosi S., Hunault G., Ernoult E., Artero C., Anschutz P., and C. Rabouille (2008). Live foraminifera from the open slope between Grand Rhône and Petit Rhône Canyons (NW Mediterranean). Deep Sea Research Part I, 55: 1532-1553. https://doi.org/10.1016/j.dsr.2008.07.003
  46. Lansard B., Charmasson S., Gascó C., Antón M.-P., Grenz C., and M. Arnaud (2007). Spatial and temporal variations of plutonium isotopes (238PPu and 239,240PPu) in sediments off the Rhone River mouth (NW Mediterranean). Science of the Total Environment, 376: 215-227. https://doi.org/10.1016/j.scitotenv.2007.01.069
  47. Lansard B., Grenz C., Charmasson S., Schaaff E., and C. Pinazo (2006). Potential plutonium remobilisation linked to marine sediment resuspension: an estimate based on flume experiments. Journal of Sea Research, 55: 74-85. https://doi.org/10.1016/j.seares.2005.08.003
  48. Schaaff E., Grenz C., Pinazo C., and B. Lansard (2006). Field and laboratory measurements of sediment erodability: a comparison. Journal of Sea Research, 55: 30-42. https://doi.org/10.1016/j.seares.2005.09.004
  49. Lansard B., Charmasson S., Eyrolle F., Arnaud M., and C. Grenz (2003). Plutonium isotopes remobilization from natural sediments (Gulf of Lions, Northwestern Mediterranean Sea): Estimation based on flume experiments. American Institute of Physics, 673: 99-101. https://doi.org/10.1063/1.1594566
  50. Rabouille C., Denis L., Dedieu K., Stora G., Lansard B., and C. Grenz (2003). Oxygen demand in coastal marine sediments: comparing in-situ microelectrodes and laboratory core incubations. Journal of Experimental Marine Biology and Ecology, 285-286: 49-69. https://doi.org/10.1016/S0022-0981(02)00519-1
  51. Lansard B., Rabouille C., and D. Massias (2003). Variability in benthic oxygen fluxes during the winter-spring transition in coastal sediments: an estimation by in-situ microelectrodes and laboratory minielectrodes. Oceanologica Acta, 26 (3): 269-279. https://doi.org/10.1016/S0399-1784(03)00013-6

Teaching

@ Université Paris-Saclay

  • M2 STEPE – Climat & Médias – for journalists and communicators: Cliquez ici
    • This Master is run in close collaboration with ESJ-Lille and AUF
  • M2 STEPE – ECLAT – Ocean carbon cycle and continent-ocean interactions: Cliquez ici
  • M2 STEPE – CLUES – Biogeochemical cycles and interactions with the biosphere at the global scale: Cliquez ici
  • M2 STEPE – ACC – Climate Foresight et Impact Analysis: Cliquez ici
  • M1 STEPE – Experimental module: Use of microsensors in the aquatic environment: Cliquez ici

@ UVSQ

  • L3 : SVT
    • Introduction to physical, chemical and biological oceanography (EN502)
    • Environment and Applied Geosciences (EN681)
    • Geomatics: Remote sensing (GEO614)
    • Ecology and Hydrobiology (BI611)

Collective responsibilities

  • Appointed member of the Scientific Council of the Chemistry-Biology Department of LNE
  • Elected member of the UVSQ Board of Directors between 2020 and 2024
  • Elected member of the CFVU and the acedemic concil of UVSQ between 2016 and 2020
  • Elected member of the LSCE Laboratory Council from 2014 to 2025