Royal Netherlands Institute for Sea Research
Royal Netherlands
Institute for Sea Research
Phone number
+31 (0)222 369 442
Location
Texel
Department
Ocean Systems (OCS)
Function
Senior Scientist

Prof. Dr. Geert-Jan Brummer

Senior Scientist

Expertise

  • Particle fluxes in the oceans
  • Planktonic foraminifera
  • Sedimentation and sediment formation
  • Climate change

Research interests & personal motivation

As a scientist at Royal NIOZ and extra-ordinary Professor at the VU-Amsterdam, I pursue how sediments are formed under recent and past conditions of ocean-climate change. Topics range from seasonal particle production by biomineralising ocean plankton, to Sharan dust deposition, current transport of bottom sediment and coral carbonate geochemistry in response to changing ocean-climate. Through collaborative projects in ocean-going research , mainly in the Atlantic and western Indian Ocean I am addressing research questions pertaining to:

•        Sediment genesis: the pathways of production, transformation and accumulation fluxes of sedimentary matter, notably biogenic carbonates, silica and organic compounds.

•        Ocean-climate change: anthropogenic and natural variability of biogeochemical cycling and thermohaline circulation; high-resolution paleoceanography.

•        Planktonic foraminifera: biodiversity and population dynamics, seasonality and intermittency of export fluxes, isotope and chemical composition, dissolution and sediment mixing; proxy validation, evolutionary paleoceanography.

•        Physical forcing mechanisms: effects of stratification and mixing, eddy transports, thermo-haline circulation, re-suspension and sediment focussing.

Linked news

Wednesday 24 January 2018
Koralen van 'Darwin' verklaren schommelingen in mondiale opwarmingssnelheid
De aarde warmt snel op door de menselijke uitstoot van broeikasgassen, maar ook natuurlijke factoren spelen een rol bij variaties in de opwarmingssnelheid. Metingen van de mondiale oppervlaktetemperaturen laten soms onderbrekingen zien in de…

Linked blogs

Tuesday 16 October 2018
PhD defence Laura Korte
From this day on, Laura Korte may call herself a PhD; she successfully defended her thesis “Saharan dust deposition in the equatorial North Atlantic Ocean and its impact on particle export fluxes” at the Vrije Universiteit Amsterdam. A committee of…
Tuesday 09 January 2018
NICO 2 samples Saharan dust
NICO expedition leg 2 was designed to study the impact of Saharan dust on the marine environment and they are sailing right through a Saharan-dust outbreak.
Friday 20 October 2017
Saharan dust and Amazon freshwaters cause algal blooms
New findings suggest that both Saharan dust and freshwater from the Amazon may have led to algal blooms in the western equatorial Atlantic Ocean. Those are the conclusions of a new paper published by Catarina Guerreiro and colleagues in the…
Tuesday 17 October 2017
Dust (and smoke) is in the air!
Cyclone Ophelia draws Sahara dust and Iberian smoke to northern Europe
Sunday 10 September 2017
New dust paper published by Carmen Friese
The manuscript by Carmen Friese (MARUM) has now been published as "full" paper in the open-access journal Atmospheric Chemistry & Physics. The paper is entitled: "Seasonal provenance changes in present-day Saharan dust collected in and off…
Saturday 09 September 2017
Expedition M140
Research Expedition M140 onboard FS Meteor took place from 10 August until 5 September 2017 and was dedicated to servicing three sediment-trap mooring stations and surface buoys that have been collecting Saharan dust since we deployed them last year…
Wednesday 14 June 2017
New dust paper by Catarina Guerreiro accepted in Biogeosciences
New dust paper by Catarina Guerreiro accepted for Biogeosciences Discussions
Tuesday 13 June 2017
Saharan dust outbreak
A huge dust outbreak occurred off NW Africa, which was registered by our buoys!
Tuesday 30 May 2017
New dust paper published by Laura Korte
Laura Korte published her very first paper in the open-access journal Atmospheric Chemistry & Physics

NIOZ publications

  • 2018
    Dorschel, B.; Jensen, L.; Arndt, J. E.; Brummer, G.-J.; de Haas, H.; Fielies, A.; Franke, D.; Jokat, W.; Krocker, R.; Kroon, D.; Pätzold, J.; Schneider, R.R.; Spieß, V.; Stollhofen, H.; Uenzelmann-Neben, G.; Watkeys, M.; Wiles, E. (2018). The Southwest Indian Ocean bathymetric compilation (swIOBC). Geochem. Geophys. Geosyst. 19(3): 968-976. https://dx.doi.org/10.1002/2017gc007274
    Hennekam, R.; Zinke, J.; van Sebille, E.; ten Have, M.; Brummer, G.-J. A.; Reichart, G.-J. (2018). Cocos (Keeling) corals reveal 200 years of multidecadal modulation of southeast Indian Ocean hydrology by Indonesian throughflow. Paleoceanography and Paleoclimatology 33: 48-60. https://doi.org/10.1002/2017PA003181
    Mezger, E.M.; de Nooijer, L.J.; Siccha, M.; Brummer, G.-J. A.; Kucera, M.; Reichart, G.-J. (2018). Taphonomic and ontogenetic effects on Na/Ca and Mg/Ca in spinose planktonic foraminifera from the Red Sea. Geochem. Geophys. Geosyst. Early View. https://dx.doi.org/10.1029/2018gc007852
  • 2017
    Carvalho, M.G.; Moreira, C.; Cardoso, J.F.M.F.; Brummer, G.-J. A.; van Gaever, P.; van der Veer, H.W.; Queiroga, H.; Santos, P.T.; Correia, A.T. (2017). Movement, connectivity and population structure of the intertidal fish Lipophrys pholis as revealed by otolith oxygen and carbon stable. Mar. Biol. Res. 137(7): 764-773. https://dx.doi.org/10.1080/17451000.2017.1306079
    Guerreiro, C.V.; Baumann, K.-H.; Brummer, G.-J. A.; Fischer, G.; Korte, L.F.; Merkel, U.; Sá, C.; de Stigter, H.; Stuut, J.-B.W. (2017). Coccolithophore fluxes in the open tropical North Atlantic: influence of thermocline depth, Amazon water, and Saharan dust. Biogeosciences 14(20): 4577-4599. https://dx.doi.org/10.5194/bg-14-4577-2017
    Korte, L.F.; Brummer, G.-J. A.; van der Does, M.; Guerreiro, C.V.; Hennekam, R.; van Hateren, J.A.; Jong, D.; Munday, C.I.; Schouten, S.; Stuut, J-B W. (2017). Downward particle fluxes of biogenic matter and Saharan dust across the equatorial North Atlantic. Atmos. Chem. Phys. 17(9): 6023-6040. https://dx.doi.org/10.5194/acp-17-6023-2017
  • 2016
    Jonkers, L.; Buse, B.; Brummer, G.-J. A.; Hall, I.R. (2016). Chamber formation leads to Mg/Ca banding in the planktonic foraminifer Neogloboquadrina pachyderma. Earth Planet. Sci. Lett. 451: 177–184. dx.doi.org/10.1016/j.epsl.2016.07.030
    Mezger, E.M.; de Nooijer, L.J.; Boer, W.; Brummer, G.-J.A.; Reichart, G.-J. (2016). Salinity controls on Na incorporation in Red Sea planktonic foraminifera. Paleoceanography 31(12): 1562–1582. dx.doi.org/10.1002/2016PA003052
    van der Does, M.; Korte, L.F.; Munday, C.I.; Brummer, G.-J. A.; Stuut, J-B W. (2016). Particle size traces modern Saharan dust transport and deposition across the equatorial North Atlantic. Atmos. Chem. Phys. 16: 13697–13710. dx.doi.org/10.5194/acp-16-13697-2016
  • 2015
    Feldmeijer, W.; Metcalfe, B.; Brummer, G.-J.A.; Ganssen, G. (2015). Reconstructing the depth of the permanent thermocline through the morphology and geochemistry of the deep dwelling planktonic foraminifer Globorotalia truncatulinoides. Paleoceanography 30(1): 1-22. dx.doi.org/10.1002/2014PA002687
    Kasper, S.; van der Meer, M.T.J.; Castañeda, I.S; Tjallingii, R.; Brummer, G.J.A.; Sinninghe Damsté, J.S.; Schouten, S. (2015). Testing the alkenone D/H ratio as a paleo indicator of sea surface salinity in a coastal ocean margin (Mozambique Channel). Org. Geochem. 78: 62-68. dx.doi.org/10.1016/j.orggeochem.2014.10.011
    Metcalfe, B.; Feldmeijer, W.; de Vringer-Picon, W.; Brummer, G.-J.A.; Peeters, F.J.C.; Ganssen, G.M. (2015). Late Pleistocene glacial–interglacial shell-size–isotope variability in planktonic foraminifera as a function of local hydrography. Biogeosciences 12(15): 4781-4807. dx.doi.org/10.5194/bg-12-4781-2015
    Scussolini, P.; Scussolini, G.; Brummer, G.-J.A.; Peeters, F.J.C. (2015). Saline Indian Ocean waters invaded the South Atlantic thermocline during glacial termination II. Geology (Boulder Colo.) 43(2): 139-142. dx.doi.org/10.1130/G36238.1
    Steinhardt, J.; Cléroux, C.; de Nooijer, L.J.; Brummer, G.-J.A.; Zahn, R.; Ganssen, G.; Reichart, G.-J. (2015). Reconciling single-chamber Mg / Ca with whole-shell d18O in surface to deep-dwelling planktonic foraminifera from the Mozambique Channel. Biogeosciences 12: 2411-2429. dx.doi.org/10.5194/bg-12-2411-2015
    Steinhardt, J.; de Nooijer, L.J.; Brummer, G.-J.A.; Reichart, G.J. (2015). Profiling planktonic foraminiferal crust formation. Geochem. Geophys. Geosyst. 16: 2409-2430. dx.doi.org/10.1002/2015GC005752
  • 2014
    Booij, K.; van Bommel, R.; van Aken, H.M.; van Haren, H.; Brummer, G.J.A.; Ridderinkhof, H. (2014). Passive sampling of nonpolar contaminants at three deep-ocean sites. Environ. Pollut. 195: 101-108. dx.doi.org/10.1016/j.envpol.2014.08.013
    Steinhardt, J.; Cléroux, C.; Ullgren, J.E.; de Nooijer, L.J.; Durgadoo, J.V.; Brummer, G.J.A.; Reichart, G.J. (2014). Anti-cyclonic eddy imprint on calcite geochemistry of several planktonic foraminiferal species in the Mozambique Channel. Mar. Micropaleontol. 113: 20–33. dx.doi.org/10.1016/j.marmicro.2014.09.001
    van der Lubbe, J.L.; Tjallingii, R.; Prins, M.A.; Brummer, G.-J.A.; Jung, S.J.H.; Kroon, D.; Schneider, R.R. (2014). Sedimentation patterns off the Zambezi River over the last 20,000 years. Mar. Geol. 355: 189–201. dx.doi.org/10.1016/j.margeo.2014.05.012
  • 2013
    Grove, C.A.; Zinke, J.; Peeters, F.; Park, W.; Scheufen, T.; Kasper, S.; Randriamanantsoa, B.; McCulloch, M.T.; Brummer, G.J.A. (2013). Madagascar corals reveal a multidecadal signature of rainfall and river runoff since 1708. Clim. Past 9(2): 641-656. dx.doi.org/10.5194/cp-9-641-2013
    Grove, G.A.; Brummer, G.J.A.; Kasper, S.; Zinke, J.; Pfeiffer, M.; Garbe-Schonberg, D. (2013). Confounding effects of coral growth and high SST variability on skeletal Sr/Ca: Implications for coral paleothermometry. Geochem. Geophys. Geosyst. 14(4): 1277-1293. dx.doi.org/10.1002/ggge.20095
    Jonkers, L.; Jiménez-Amat, P.; Mortyn, P.G.; Brummer, G.-J.A. (2013). Seasonal Mg/Ca variability of N. pachyderma (s) and G. bulloides: Implications for seawater temperature reconstruction. Earth Planet. Sci. Lett. 376: 137-144. dx.doi.org/10.1016/j.epsl.2013.06.019
  • 2012
    Fallet, U.; Castañeda, I.S; Henry-Edwards, A; Richter, T.O.; Boer, W.; Schouten, S.; Brummer, G.J. (2012). Sedimentation and burial of organic and inorganic temperature proxies in the Mozambique Channel, SW Indian Ocean. Deep-Sea Res., Part 1, Oceanogr. Res. Pap. 59: 37-53. dx.doi.org/10.1016/j.dsr.2011.10.002
    Grove, C.A.; Zinke, J.; Scheufen, T.; Maina, J.; Epping, E.; Boer, W.; Randriamanantsoa, B.; Brummer, G.-J.A. (2012). Spatial linkages between coral proxies of terrestrial runoff across a large embayment in Madagascar. Biogeosciences 9(8): 3063-3081. dx.doi.org/10.5194/bg-9-3063-2012
    Jonkers, L.; de Nooijer, L.J.; Reichart, G.J.; Zahn, R.; Brummer, G.-J.A. (2012). Encrustation and trace element composition of Neogloboquadrina dutertrei assessed from single chamber analyses - implications for paleotemperature estimates. Biogeosciences 9(11): 4851-4860. dx.doi.org/10.5194/bg-9-4851-2012
    Jonkers, L.; Prins, M.A.; Moros, M.; Weltje, G.J.; Troelstra, S.R.; Brummer, G.J.A. (2012). Temporal offsets between surface temperature, ice-rafting and bottom flow speed proxies in the glacial (MIS 3) northern North Atlantic. Quat. Sci. Rev. 48: 43-53. dx.doi.org/10.1016/j.quascirev.2012.06.006
    Nagtegaal, R.; Grove, C.A.; Kasper, S.; Zinke, J.; Brummer, G.J.A. (2012). Spectral luminescence and geochemistry of coral aragonite: Effects of whole-core treatment. Chem. Geol. 318: 6-15. dx.doi.org/10.1016/j.chemgeo.2012.05.006
  • 2011
    Fallet, U.; Ullgren, J.E; Castañeda, I.S.; van Aken, H.M.; Schouten, S.; Ridderinkhof, H.; Brummer, G.J.A. (2011). Contrasting variability in foraminiferal and organic paleotemperature proxies in sedimenting particles of the Mozambique Channel (SW Indian Ocean). Geochim. Cosmochim. Acta 75(20): 5834-5848. dx.doi.org/10.1016/j.gca.2011.08.009
    Ganssen, G.M.; Peeters, F.J.C.; Metcalfe, B.; Anand, P.; Jung, S.J.H.; Kroon, D.; Brummer, G.-J.A. (2011). Quantifying sea surface temperature ranges of the Arabian Sea for the past 20 000 years. Clim. Past 7: 1337–1349. hdl.handle.net/10.5194/cp-7-1337-2011