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Belgian researchers - Oceans

Dehairs Frank
Professor, Dr

Dehairs Frank started his research career with the study of barium and barite in suspended matter from the Atlantic and Pacific Oceans in the framework of the GEOSECS Programme. As a Post Doc in the mid eighties he became strongly involved in studies related with the functioning and strength of the biological carbon pump in the Southern Ocean (he participated in seven S.O. expeditions in co-operation with French, German, Australian and US research groups), using tracers and proxies. His research group has developed expertise for sampling and analysis of trace elements and stable isotopes.

Activities

  • Research programme:
    • SPSD I : Antarctica IV
    • SPSD II : Antarctica V
    • SD : Antarctica VI
  • Research group : Vrije Universiteit Brussel - Analytical and Environmental Chemistry (ANCH-VUB)
  • Research projects:
    • Integrated Study of Southern Ocean Biogeochemistry and Climate Interactions in the Anthropocene (BELCANTO III)
    • Assessing the sensitivity of the Southern Ocean’s biological carbon pump to climate change (BELCANTO II)
    • Export of organic carbon from the oceanic surface mixed layer and mineralisation in the twilight zone (VERTIGO)
    • EUR-OCEANS Network of Excellence; WP on Biogeochemistry with focus on the Southern Ocean system (EUR-OCEANS)
  • Related activities:

List of publications

Dehairs, F., L. Goeyens, N. Stroobants, P. Bernard, C. Goyet, A. Poisson and R. Chesselet, 1990. On suspended barite and the oxygen minimum in the Southern Ocean, Global Biogeochemical Cycles, 4, 85-102.

Dehairs, F., N. Stroobants and L. Goeyens, 1991. Suspended barite as a tracer of biological activity in the Southern Ocean, Marine Chemistry, 35, 399-410.

Stroobants, N., F. Dehairs, L. Goeyens, N. Vanderheijden and R. Van Grieken, 1991. Barite formation in the Southern Ocean water column, Marine Chemistry, 35, 411-422.

Goeyens. L., F. Sörensson, P. Tréguer, J. Morvan, M. Panouse and F. Dehairs, 1991. Spatiotemporal variability of inorganic nitrogen stocks and uptake fluxes in the Scotia-Weddell Confluence area during November and December 1988, Marine Ecology Progress Series, 77, 7-19.

Goeyens, L., P. Tréguer, C. Lancelot, S. Mathot, S. Becquevort, J. Morvan, F. Dehairs and W. Baeyens, 1991. Ammonium regeneration in the Scotia-Weddell Confluence area during spring 1988, Marine Ecology Progress Series, 78, 241-252.

Dehairs, F., L. Goeyens, N. Stroobants and S. Mathot, 1992. Elemental composition of suspended matter in the Scotia-Weddell Confluence area during spring and summer 1988 (EPOS Leg 2), Polar Biology, 12, 25-33.

Dehairs, F., W. Baeyens and L. Goeyens, 1992. Accumulation of suspended barite at mesopelagic depths and export production in the Southern Ocean, Science, 258, 1332-1335.

Shopova D., F. Dehairs and W. Baeyens, 1995. A simple model of biogeochemical element distribution in the water column of the Southern Ocean, Journal of Marine Systems, 6, 331-344.

Goeyens, L., P. Tréguer, E.M. Baumann, W. Baeyens and F. Dehairs, 1995. The leading role of ammonium in the nitrogen uptake regime of Southern Ocean marginal ice zones, Journal of Marine Systems, 6, 345-361.

Kopczynska, E., L. Goeyens, M. Semeneh and F. Dehairs, 1995. Phytoplankton composition and cell carbon distribution in Prydz Bay, Antarctica: Relation to organic particulate matter and its δ13C values, Journal of Plankton Research, 17, 685-707.

Semeneh M., Dehairs F. and L. Goeyens, 1995. Uptake of nitrogenous nutrients by phytoplankton in the tropical western Indian Ocean (Kenyan Coast): monsoonal and spatial variability, in “Monsoons and Coastal Ecosystems”, eds. C. H. R. Heip, M. A. Hemminga and M. J. M. de Bie, National Museum of Natural History, Leiden, pp 101 – 104.

Dehairs, F., E. Kopczynska, P. Nielsen, C. Lancelot, D. Bakker, W. Koeve and L. Goeyens, 1997. δ13C of Southern Ocean suspended organic matter during spring and early summer: Regional and temporal variability, Deep-Sea Research II, 44, 129-142.

Dehairs, F., D. Shopova, S. Ober, C. Veth and L. Goeyens, 1997. Particulate barium stocks and oxygen consumption in the Southern Ocean mesopelagic water column during spring and early summer: Relationship with export production, Deep-Sea Research II, 44, 497-516.

Löscher, B.M., J.T.M. de Jong, H.J.W. de Baar, C. Veth and F. Dehairs, 1997. The distribution of Fe in the Antarctic Circumpolar Current, Deep-Sea Research II, 44, 143-188.

Goeyens L., M. Semeneh, M.E.M. Baumann, M. Elskens, D. Shopova and F. Dehairs, 1998. Phytoplankton nutrient utilisation and nutrient signature in the Southern Ocean, Journal of Marine Systems, 17, 143-147.

Jeandel C., D. Ruiz-Pino, E. Gjata, A. Poisson, C. Brunet, E. Charriaud, F. Dehairs, D. Delille, M. Fiala, C. Fravalo, J.-C. Miquel, Y.-H. Park, P. Pondaven, B. Quéguiner, S. Razouls, B. Shauer and P. Tréguer, 1998. KERFIX, a time series station in the Southern Ocean: A presentation, Journal of Marine Systems, 17, 555-569.

Semeneh M., F. Dehairs, M. Elskens, M.E.M. Baumann, E.E. Kopczynska, C. Lancelot, L. Goeyens, 1998. Nitrogen uptake regime and phytoplankton community structure in the Atlantic and Indian sectors of the Southern Ocean, Journal of Marine Systems, 17, 159-177.

Monnin, C., C. Jeandel, T. Cattaldo and F. Dehairs, 1999. The marine barite saturation state of the world’s ocean, Marine Chemistry, 65, 253-261.

Dehairs F., N. Fagel, A.N. Antia, R. Peinert, M. Elskens and L. Goeyens, 2000. Export production in the Gulf of Biscay as estimated from barium-barite in settling material: A comparison with new production, Deep-Sea Research I, 47, 583-601.

Jeandel, C., K. Tachikawa. K., A. Bory and F. Dehairs, 2000. Barite-fluxes and suspended-barite to trace export production in the tropical NE Atlantic (EUMELI sites), Marine Chemistry, 71, 125-142.

Kopczynska E., F. Dehairs, M. Elskens and S. Wright, 2001. Phytoplankton variability between the subtropical and Polar Fronts south off Australia: Thriving under regenerative and new production in late summer, Journal of Geophysical Research, 106, 31,597.

Cardinal D., F. Dehairs, T. Cattaldo and L. André, 2001. Constraints on export and advection in the Subantarctic and Polar Front Zones, south of Australia from the geochemistry of suspended particles, Journal of Geophysical Research, 106, 31,637.

Fagel N., F. Dehairs, L. André, G. Bareille and C. Monnin, 2002. Export production estimation from sedimentary Ba content: A comparison between Atlantic and Indian sectors of the Southern Ocean, Paleoceanography, 10.1029/2000PA000552 29 March 2002.

Elskens M., W. Baeyens, F. Dehairs, T. Cattaldo and B. Griffiths, 2002. N-uptake conditions during summer in the Sub-Antarctic and Polar Front zones in the Australasian sector of the Southern Ocean, Journal of Geophysical Research, 107, 3-1 – 3-11.

Savoye N., F. Dehairs, M. Elskens, D. Cardinal, E. E. Kopczynska, T. W. Trull, W. Baeyens and F. B. Griffiths, 2004. N-uptake and new production in the Southern Ocean during spring conditions, Geophysical Research Letters, 31(3), L03301, 10.1029/2003GL018946.

Fagel N., F. Dehairs, R. Peinert, A. Antia and L. André, 2004. Reconstructing export production at the NE Atlantic margin: Potential and limits of the Ba proxy, Marine Geology, 204, 11-25.

Savoye N., K.O. Buesseler, D. Cardinal and F. Dehairs, 2004. 234Th deficit and excess in the Southern Ocean during spring 2001: Particle export and mineralization, Geophysical Research Letters, 31, L12301, 10.1029/2004GL019744.

Jacquet, S.H.M., F. Dehairs and S.R. Rintoul, 2004. A high resolution dissolved barium transect in the Southern Ocean, Geophysical Research Letters, 31, N°14, L14301, 10.10129/2004GL020016.

Cardinal, D.B., N. Savoye, T.W. Trull, L. André, E. E. Kopczynska and F. Dehairs, 2005. Particulate Ba distributions and fluxes suggest latitudinal variations of carbon mineralization in the Southern Ocean, Deep-Sea Research I, 52, 355-370.

Jacquet, S.H.M., F. Dehairs, D.B. Cardinal, J. Navez and B. Delille, 2005. Barium distribution across the Southern Ocean frontal system in the Crozet–Kerguelen Basin, Marine Chemistry, 95, 149-310.

Cardinal D., L.Y. Alleman, F. Dehairs, N. Savoye, T.W. Trull and L. André, 2005. Relevance of silicon isotopes to Si-nutrient utilization and Si source assessment in Antarctic waters, Global Biogeochemical Cycles, 19, GB2007, doi:10.1029/2004GB002364.

Jacquet S.H.M., J. Navez and F. Dehairs, ICP-MS and HR-ICP-MS analyses of barium in seawater by isotope dilution, submitted to Spectrochimica Acta B.

Jacquet S.H.M., F. Dehairs, N. Savoye, M. Elskens and D. Cardinal, Barium-cycle dynamics in the Australian sector of the Southern Ocean, submitted to Marine Chemistry.

Cardinal D., N. Savoye, T. W. Trull, F. Dehairs, E. E. Kopczynska, F. Fripiat and Luc André, Silicon isotopes in size-fractionated diatoms in the spring Southern Ocean suggest latitudinally-varying isotopic fractionation, submitted to Marine Chemistry.

Kopczyńska E.E., N. Savoye, F. Dehairs, D. Cardinal, M. Elskens, Spring phytoplankton assemblages in the Southern Ocean between Australia and Antarctica; relationship to nitrogen regime, in preparation for Deep-Sea Research II.

Books

Dehairs F., C. Lancelot and M. Frankignoulle, 2001. The role of the Southern Ocean in the global carbon cycle and its climatic implications, In: H. Decleir and C. De Broyer eds. The Belgica Expedition Centennial: Perspectives on Antarctic Science and History, VUB Brussels, University Press, 287-294 pp.

Reports

Dehairs, F. and L. Goeyens, 1988. Dissolved barium and nutrients in the Southern Ocean: Their potential use as tracers for the characterisation of the different watermasses, in: Proceedings of the Belgian National Colloquium on Antarctic Research, Prime Minister's services, Science Policy Office, Brussels, D/1988/1191/1, 79-95.

Dehairs, F. and L. Goeyens, 1989. The biogeochemistry of barium in the Southern Ocean, in: Antarctica, Belgian Scientific Research Programme on Antarctica, Scientific Results of Phase One (Oct '85 - Jan '89), ed. S. Caschetto, Prime Minister's Services, Science Policy Office, Brussels, II, Part A, 1-100.

Goeyens, L. and F. Dehairs, 1993. Seasonal fluctuations of export and recycled production in different areas of the Southern Ocean, in: "Plankton Ecology and Marine Biogeochemistry", ed. S. Caschetto, Belgian Scientific Research Programme on Antarctica, Scientific Results of Phase two (10/1988 - 05/1992), Vol. 1, Belgian Science Policy Office, Brussels, 2-79.

Dehairs F., C. Lancelot, L. André, M. Frankignoulle and E. Deleersnijder, 2003. An integrated approach to assess carbon dynamics in the Southern Ocean, in: “Belgian Scientific programme on the Antarctic, Phase 4 (1997-2001)”, Vol I, Belgian Federal Public Planning Service Science Policy, D/2003/1191/8, Brussels, Belgium, 160 pp.

Campaign Reports

Goeyens, L. and F. Dehairs, 1989. Study of the remineralization process by N-15 isotope dilution experiments, in: Les Rapports des Campagnes à la Mer, MD 53 / INDIGO 3, à Bord du Marion Dufresne, 3 janvier - 27 février 1987, eds. A. Poisson and S. Caschetto, Les Publications de la Mission de Recherche des Terres Australes et Antarctiques Françaises, n°87-01, fasc. 3, 5-21.

Symposium Abstracts

Navez, J., F. Dehairs and T. Cattaldo, 1999. Isotope Dilution ICP-MS Analysis of barium in seawater: Improvement of the accuracy with a new approach to correct for mass bias, Colloquium Spectroscopicum Internationale XXXI, August 1999, Ankara.

Cattaldo T., F. Dehairs, C. Jeandel, C. Monnin and N. Metzl, 1998. Biotic and abiotic controls of the barium distribution in the Southern Ocean water column, Goldschmidt Conference, August 1998, Toulouse, Mineralogical Magazine, 62A, 284-285.

Fagel, N., L. André, F. Dehairs, C. Monnin and G. Bareille, 1999. Discrepancies in the behaviour of the Ba productivity proxy between the Atlantic and the Indian sectors of the Southern Ocean, EUG-10, Strassbourg, March 28 – April 1, 1999, Journal of Conference Abstracts p241.

Cardinal D., N. Fagel, L. André and F. Dehairs, 1999. Ba repartition in surface sediment and trap material: A sequential leaching approach, EUG-10, Strassbourg, March 28 – April 1, 1999, Journal of Conference Abstracts p245.

Dehairs F. and T. Cattaldo, 2000. The subsurface particulate excess Ba maximum in the Southern Ocean and its relationship to export and water column remobilisation of organic carbon, EOS, Transactions of the American Geophysical Union, 80, 240, abstract, Ocean Sciences Meeting, January 24-28, 2000, San Antonio, Texas.

Elskens M., Cattaldo T., Goeyens L and Dehairs F., 2000. Uptake conditions during summer in the Subantarctic region of the Southern Ocean, The Southern Ocean: Climatic changes and the cycle of carbon, International JGOFS Symposium, 9-13 July 2000, Brest-France.

Cardinal D., André L., Dehairs F., Jeandel C. and Trull T., 2000. Seasonal and spatial variations of geochemical composition of settling material from southern ocean sediment traps (KERFIX & SAZ ‘98), The Southern Ocean: Climatic changes and the cycle of carbon, International JGOFS Symposium, 9-13 July 2000, Brest-France.

Fagel N., Dehairs F., Monnin C. Jeandel C., André L. and Bareille G., 2000, Export production estimation in the southern ocean from sedimentary excess Ba: How can the degree of preservation of the water column Ba signal be assessed ? The Southern Ocean: Climatic changes and the cycle of carbon, International JGOFS Symposium, 9-13 July 2000, Brest-France.

Cattaldo T., Jeandel C., Dehairs F. and Metzl N., 2000. Dissolved barium in the southern ocean: conservative vs non-conservative behaviour as constrained by a multiple end-member mixing model, The Southern Ocean: Climatic changes and the cycle of carbon, International JGOFS Symposium, 9-13 July 2000, Brest-France.

Cattaldo T., Dehairs F., Cardinal D. and Navez J., 2000. Ba and Sr uptake by phytoplankton and suspended matter in SAZ and PFZ of the Australian and Indian sectors of the Southern Ocean, The Southern Ocean: Climatic changes and the cycle of carbon, International JGOFS Symposium, 9-13 July 2000, Brest-France.

Dehairs F., Cattaldo T., Cardinal D., Kopczynska E. and M. Elskens, 2000. Export of organic matter from the Subantarctic and the Polar Front Zone: Confronting the bottom-up Ba proxy and the top-down new production approaches, The Southern Ocean: Climatic changes and the cycle of carbon, International JGOFS Symposium, 9-13 July 2000, Brest-France.

André, L., D. Cardinal and F. Dehairs, 2002. Particulate Ba and U in the Southern Ocean: Links with exported carbon and surface biogeochemical processes. AGU fall meeting, OS21B-0202, 6-12 December 2002, San Francisco.

Savoye S., F. Dehairs, M. Elskens, P. Sedwick D. Hutchins, 2002. Interaction of Iron and Ammonium on N-Uptake in the Southern Ocean, South of Australia, AGU Fall Meeting, San Francisco, 6-12 December 2002.

Jacquet S., T. Cattaldo, D. Cardinal, J. Navez, F. Dehairs, 2003. Dissolved Ba in the complex frontal system of the Crozet – Kerguelen basin and comparison with other Southern Ocean frontal zones, EGS-AGU-EUG meeting Nice, April 2003.

Cardinal D., L. André, F. Dehairs, M. Elskens, S. Jacquet, N. Savoye, T. Trull, 2003. Seasonal and spatial dynamics of the mesopelagic Ba proxy in the Southern Ocean, EGS-AGU-EUG meeting Nice, April 2003.

Savoye N., K. Buesseler, B. Griffiths, F. Dehairs, S. Wright S. Pike and T. Trull, 2003. Particle fluxes from 234Th measurements during the CLIVAR-SR3 cruise in the Southern Ocean (spring 2001, south of Australia), EGS-AGU-EUG meeting Nice, April 2003.

Dehairs F., M. Elskens, N. Savoye, D. Cardinal, W. Baeyens, E. Kopczynska, K. Buesseler and T. Trull, 2003. Spatial and temporal variability of carbon export and mineralization in the Southern Ocean along 143°E, as assessed through different approaches, EGS-AGU-EGU meeting Nice, April 2003.

Jacquet S. H. M., F. Dehairs, D. Cardinal, N. Savoye and T. Trull, 2004. Dynamics of dissolved and particulate barium in the mesopelagic waters and fluxes of Ba in the deep sea of the southern ocean along 142°E: Clues for the barite formation process and the fate of exported carbon, European Geosciences Union 2004, Geophysical Research Abstracts, Vol. 6, 03402, 2004.

Jacquet S., A. de Brauwere, F. Dehairs, M. Elskens, C. Jeandel, N. Metzl, S. Rintoul and T. Trull, 2005. Comparison of dissolved Barium with Nutrients and Physico-chemical Conditions along 30°E and 145°E across the Southern Ocean, European Geosciences Union 2005, Geophysical Research Abstracts, Vol. 7, 06312, 2005.

de Brauwere A., S. Jacquet, F. Dehairs, F. De Ridder, R. Pintelon and J. Schoukens, 2005. Refinement of Optimum Multiparameter approach for water mass analysis European Geosciences Union 2005, Geophysical Research Abstracts, Vol. 7, 06424, 2005.

Cardinal D., L. Alleman, N. Savoye, T. W. Trull, F. Dehairs and L. André, 2005. Using silicon isotopes in oceanography: What can we learn from a high-resolution transect in the Southern Ocean? European Geosciences Union 2005, Geophysical Research Abstracts, Vol. 7, 10975, 2005.

Dehairs F., D. Cardinal, N. Savoye, S. Jacquet; A. Luc and M. Elskens, 2005. A trace element and isotope proxy approach for the study of the biological carbon pump: a Southern Ocean case study, International Ocean Research Conference, The Oceanography Society, UNESCO-IOC, 6-10 June, 2005, Paris.

Cardinal, D., N. Savoye, S.H.M. Jacquet, L. André, D. Wolf-Gladrow, F. Dehairs, 2005. Silicon isotopes, 234-Thorium and mesopelagic Barium to constrain the dynamics of a Southern Ocean diatom bloom induced by in situ iron fertilization (EIFEX), ASLO Summer Meeting, 19-23 June, 2005, Santiago de Compostela, Spain.

Jacquet S.H.M., J. Navez and F. Dehairs, Colloquium Spectroscopicum Internationale XXXIV, 4-9 September 2005, Antwerp

Contact

Dehairs Frank
Vrije Universiteit Brussel
Analytische en Milieuchemie
Pleinlaan 2 - 1000 Brussel
fdehairs@vub.ac.be
Phone: +32 2 629 32 60 - Fax: +32 2 629 32 74

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