Royal Netherlands Institute for Sea Research
Phone number
+31 (0)222 36 9402
National Marine Facilities (NMF)
Acoustic Researcher/Data Scientist
  • Marine geology
  • Sedimentology
  • Marine acoustics (seismics, (multibeam) echosounders, underwater navigation)
Article: 'Geoloog onder water' in G&BArticle: 'Geoloog onder water' in G&B

Dr. Henk de Haas

Acoustic Researcher/Data Scientist

Main interest and daily activities

Sea bed morphology and sedimentary processes in the marine environment (coast to deep sea) on short to long term time scales (tides to glacial-interglacial cycles and longer).

Advice and support (on shore and at sea) NIOZ and non-NIOZ scientists in the use of marine acoustic equipment (=equipment that uses sound) that is designed to determine the depth of the ocean (bathymetry) and subbottom sediment layering,  observe objects in the water column (like for instance fish, plankton and clouds of suspended sediments) and for underwater navigation (a bit like an `underwater GPS system'). Perform acoustic data processing and interpretation. Assist in organising and operating scientific cruises.

Current projects: EMODnet Bathymetry


Example of a 3D multibeam echosounder image: the Al Idrisi mud volcano, off shore Morocco

(diameter: 5 km, height: 275 m)

Linked news

Thursday 27 July 2017
“De oceaanbodem is een stuk variabeler dan we tot nu toe dachten”
“De oceaanbodem is een stuk variabeler dan we tot nu toe dachten”

Linked blogs

Monday 23 October 2023
Methane emission in the North Sea II
Methane escapes from the seabed of the North Sea in various places. Recent German research suggested that this mainly occurs in the vicinity of abandoned wells. Methane is a potent greenhouse gas and its release into the sea and subsequent release…
Thursday 29 June 2017
Expedition Hotchpotch
During the last week the central theme in our work was sea level change, but this week has come to an end and it is time for a change of subject. And a change of people too. At 7 o’clock this morning Pelagia arrived at Texel. All the non-Pelagia crew…
Friday 23 June 2017
North Sea Expedition 'Sea level rise'
About 12.000 years ago sea level was more 60m lower than today and large parts of the North Sea were dry land. In the following 4.000 years sea level rose more than 40m and the North Sea was formed. This story currently lies buried below the present…

NIOZ publications

  • 2022
    Humphreys, M.P.; Meesters, E.H.; de Haas, H.; Karancz, S.; Delaigue, L.; Bakker, K.; Duineveld, G.; de Goeyse, S.; Haas, A.F.; Mienis, F.; Ossebaar, S.; van Duyl, F.C. (2022). Dissolution of a submarine carbonate platform by a submerged lake of acidic seawater. Biogeosciences 19(2): 347-358.
  • 2021
    de Haas, H. (2021). Geoloog onder water. Grondboor Hamer 75(3/4): 105-116
  • 2020
    Maselli, V.; Iacopini, D.; Ebinger, C.J.; Tewari, S.; de Haas, H.; Wade, B.S.; Pearson, P.N.; Francis, M.; van Vliet, A.; Richards, B.; Kroon, D. (2020). Large-scale mass wasting in the western Indian Ocean constrains onset of East African rifting. Nature Comm. 11(1): 3456.
    Maselli, V.; Kroon, D.; Iacopini, D.; Wade, B.S.; Pearson, P.N.; de Haas, H. (2020). Impact of the East African Rift System on the routing of the deep‐water drainage network offshore Tanzania, western Indian Ocean. Basin Res. 32(5): 789-803.
  • 2018
    de Haas, H. (ed.) (2019). Cruise report RV Pelagia cruise 64PE440, Netherlands Initiative Changing Oceans (NICO) leg 11. NIOZ Royal Institute for Sea Research: Texel. 22 pp.
    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.
  • 2015
    Coughlan, M.; Wheeler, A.J.; Dorschel, B.; Lordan, C.; Boer, W.; van Gaever, P.; de Haas, H.; Mörz, T. (2015). Record of anthropogenic impact on the Western Irish Sea mud belt. Anthropocene 9: 56-69.
    Nauw, J.; de Haas, H.; Rehder, G. (2015). A review of oceanographic and meteorological controls on the North Sea circulation and hydrodynamics with a view to the fate of North Sea methane from well site 22/4b and other seabed sources. Mar. Pet. Geol. 68(Part B): 861-882.
    Rodrigo-Gámiz, M.; Rampen, S.W.; de Haas, H.; Baas, M.; Schouten, S.; Sinninghe Damsté, J.S. (2015). Constraints on the applicability of the organic temperature proxies Uk'37, TEX86 and LDI in the subpolar region around Iceland. Biogeosciences 12(22).
  • 2014
    Lengger, S.K.; Lipsewers, Y.A.; de Haas, H.; Sinninghe Damsté, J.S.; Schouten, S. (2014). Lack of 13C-label incorporation suggests low turnover rates of thaumarchaeal intact polar tetraether lipids in sediments from the Iceland shelf. Biogeosciences 11(2): 201-216.
    Mienis, F.; Duineveld, G.C.A.; Davis, A.J.; Lavaleye, M.M.S.; Rosso, S.W.; Seim, H.; Bane, J.; van Haren, H.; Bergman, M.J.N.; de Haas, H.; Brooke, S.; van Weering, T.C.E. (2014). Cold-water coral growth under extreme environmental conditions, the Cape Lookout area, NW Atlantic. Biogeosciences 11: 2543-2560.
    Smeulders, G.G.B.; Koho, K.A.; de Stigter, H.C.; Mienis, F.; de Haas, H.; van Weering, T.C.E. (2014). Cold-water coral habitats of Rockall and Porcupine Bank, NE Atlantic Ocean: Sedimentary facies and benthic foraminiferal assemblages. Deep-Sea Res., Part 2, Top. Stud. Oceanogr. 99: 270-285.
    van der Land, C.; Eisele, M.; Mienis, F; de Haas, H.; Hebbeln, D.; Reijmer, J.J.G.; van Weering, T.C.E. (2014). Carbonate mound development in contrasting settings on the Irish margin. Deep-Sea Res., Part 2, Top. Stud. Oceanogr. 99: 297-306.
    Vandorpe, T.; Van Rooij, D.; de Haas, H. (2014). Stratigraphy and palaeoceanography of a topography-controlled contourite drift in the Pen Duick area, southern Gulf of Cádiz. Mar. Geol. 349: 136-151.
  • 2013
    Nauw, J.J.; de Haas, H. (2013). A modeling intercomparison for the North Sea with a view to methane dispersion. NIOZ-rapport, 2013(3). NIOZ: Texel. 112 pp.
  • 2012
    Mienis, F.; De Stigter, H.C.; de Haas, H.; van der Land, C.; van Weering, T.C.E. (2012). Hydrodynamic conditions in a cold-water coral mound area on the Renard Ridge, southern Gulf of Cadiz. J. Mar. Syst. 96-97: 61-71.
  • 2011
    Frank, N.; Freiwald, A.; López Correa, M.; Wienberg, C.; Eisele, M.; Hebbeln, D.; Van Rooij, D.; Henriet, J.-P.; Colin, C.; van Weering, T.; de Haas, H.; Buhl-Mortensen, P.; Murray Roberts, J.; De Mol, B.; Douville, E.; Blamart, D.; Hatté, C. (2011). Northeastern Atlantic cold-water coral reefs and climate. Geology (Boulder Colo.) 39(8): 743-746.
    van der Land, C.; Mienis, F.; de Haas, H.; de Stigter, H.C.; Swennen, R.; Reijmer, J.J.G.; van Weering, T.C.E. (2011). Paleo-redox fronts and their formation in carbonate mound sediments from the Rockall Trough. Mar. Geol. 284(1-4): 86-95.
    Van Rooij, D.; Blamart, D.; De Mol, L.; Mienis, F.; Pirlet, H.; Wehrmann, L. M.; Barbieri, R.; Maignien, L.; Templer, S. P.; de Haas, H.; Hebbeln, D.; Frank, N.; Larmagnat, S.; Stadnitskaia, A.; Stivaletta, N.; van Weering, T.; Zhang, Y.; Hamoumi, N.; Cnudde, V.; Duyck, P.; Henriet, J.-P.; The MiCROSYSTEMS MD 169 Shipboard Party (2011). Cold-water coral mounds on the Pen Duick Escarpment, Gulf of Cadiz: The MiCROSYSTEMS project approach. Mar. Geol. 282(1-2): 102-117.

Linked projects

Henk de Haas
European Community
Project duration
1 Apr 2015 - 30 Jun 2019
Henk de Haas
European Community
Project duration
1 Feb 2017 - 31 Dec 2018