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Bruno LANSARD

Bruno LANSARD

Equipe OCEANIS

CEA – Orme des Merisiers, Bâtiment ICE – 714, bureau 007

Tél. : (+33) 01.69.08.00.87

Maître de Conférences à l’Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)

37ème section du CNU : Météorologie, océanographie physique de l’environnement

Sujets de recherche

  • Cycle du carbone aux interfaces côtières, biogéochimie marine et diagenèse précoce
  • Chimie des carbonates à l’interface eau-sédiment et dans l’Océan Arctique
  • Utilisation de micro-capteurs in situ et de traceurs isotopiques et radiogéniques

Experiences dotorales et postdoctorales

  • 2011-2012: Postdoc CNRS: “Apports d’eau douce par les eaux souterraines en Méditerranée et âge des masses d’eaux sur le plateau des îles Kerguelen: Applications des isotopes du Radium”, Laboratoire d’Études en Géophysique et Océanographie Spatiales (LEGOS), Toulouse.
  • 2008-2010: Postdoc CRSNG, “Chimie des carbonates dans l’océan Arctique”, Department of Earth & Planetary Sciences, Université de McGill et GEOTOP. Montréal, Canada.
  • 2004-2007: 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.
  • 2001-2004: Doctorat en Sciences de l’Environnement Marin de l’Université d’Aix-Marseille II. Thèse: Distribution et remobilisation du plutonium dans les sédiments du prodelta du Rhône (Méditerranée nord occidentale), Station Marine d’Endoume, Marseille.

Publications scientifiques

Articles publiés dans des revues internationales de rang A :

  1. 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
  2. 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
  3. 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
  4. Rabouille C., Lansard B., Owings S.M., Rabalais N.N., Bombled B., Metzger E., Richirt J., Eitel E.M., Boever A., Beckler J. and M. Taillefert (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
  5. 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/
  6. 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
  7. 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
  8. 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
  9. 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
  10. 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
  11. 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
  12. 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
  13. 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
  14. 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
  15. 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
  16. 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
  17. 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
  18. 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
  19. 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
  20. 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
  21. 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
  22. 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
  23. 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
  24. 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
  25. 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
  26. 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
  27. 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
  28. 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
  29. 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
  30. 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
  31. 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
  32. 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
  33. 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
  34. 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
  35. 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
  36. 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
  37. 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
  38. 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
  39. 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
  40. 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
  41. 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
  42. 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
  43. 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
  44. 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

Chapitre de livre :

  1. 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.

Enseignement

@ Université Paris-Saclay :

  • M2 STEPE – Climat & Médias – Master 2 à destination des journalistes et des communicants : Cliquez ici

Cette formation est réalisée en étroite collaboration avec l’ESJ-Lille et l’AUF

  • M2 STEPE – ECLAT – Cyle du carbone océanique et interactions continent-océan (CM) : Cliquez ici

  • M2 STEPE – CLUES – Biogeochemical cycles and interaction with the biosphere at the global scale (CM : Oceanic Carbon Cycle) : Cliquez ici

  • M2 STEPE -ACC – Climate Foresight et Impact Analysis (CM+TD) : Cliquez ici

  • M1 STEPE – Module expérimental 1: Utilisation de microcapteurs dans l’environnement aquatique (MS1EN3017, CM+TP) : Cliquez ici

@ UVSQ :

  • L1 : Océan, Atmosphère et Climat (EN103, CM+TD)

Méthodologie (TBI1, TD)

  • L3 : Dynamique des Enveloppes Terrestres : Océanographie (EN502, CM+TD+TP)

Environnement et Géosciences Appliquées (EN681, CM+TD)

Géomatique : Télédétéction (GEO614, TD+projets)

Ecologie et Hydrobiologie (BI611, TP)

Divers

  • Membre élu au Conseil d’Administration de l’UVSQ depuis novembre 2020
  • Membre élu au Conseil du Laboratoire du LSCE du 10/2014 au 10/2021