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Guarneri, H. (author), Verlaan, M. (author), Slobbe, D.C. (author), Veenstra, J. (author), Zijl, F. (author), Pietrzak, J.D. (author), Snellen, M. (author), Keyzer, L.M. (author), Afrasteh, Y. (author), Klees, R. (author)Both empirical and assimilative global ocean tidal models are significantly more accurate in the deep ocean than in shelf and coastal waters. In this study, we answered whether this is due to the quality of the models used to reduce tide and surge or the general approach to treat tide and surge as two separate components of the water level...journal article 2023
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Afrasteh, Y. (author), Slobbe, D.C. (author), Verlaan, M. (author), Klees, R. (author), Guarneri, H. (author), Keyzer, L.M. (author), Pietrzak, J.D. (author), Sacher, M. (author), Snellen, M. (author), Zijl, F. (author)The main objective of this study is to develop and analyze an empirical noise model for model-derived coastal summer mean water levels (SMWLs) and use that to obtain a more realistic quality impact of combining hydrodynamic leveling and Unified European Leveling Network (UELN) data in realizing the European Vertical Reference System (EVRS)....journal article 2023
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Afrasteh, Y. (author), Slobbe, D.C. (author), Sacher, M. (author), Verlaan, M. (author), Klees, R. (author), Guarneri, H. (author), Keyzer, L.M. (author), Pietrzak, J.D. (author), Snellen, M. (author)All realizations of the European Vertical Reference System (EVRS) computed so far are solely based on geopotential differences obtained by spirit leveling/gravimetry. As such, there are no direct connections between height benchmarks separated by large water bodies. In this study, such connections are added by means of model-based...journal article 2023
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Safar, Z. (author), Chassagne, C. (author), Rijnsburger, S. (author), Ibanez Sanz, M. (author), Manning, A.J. (author), Souza, A.J. (author), van Kessel, T. (author), Horner-Devine, A. (author), Flores, R. (author), McKeon, M. (author), Pietrzak, J.D. (author)An 11 hours survey was performed on the 17th of September 2014 in the Rhine Region Of Freshwater Influence (Rhine-ROFI) about 10 km downstream of the mouth of the Rotterdam Waterway during calm weather conditions. Suspended Particle Matter (SPM) measurements were performed during a full tidal cycle, near the seabed, at neap tide, and samples...journal article 2022
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Guarneri, H. (author), Verlaan, M. (author), Slobbe, D.C. (author), Zijl, Firmijn (author), Pietrzak, J.D. (author), Keyzer, L.M. (author), Klees, R. (author)Satellite observations can help in the retrieval of constituents in shallow waters. Noise contamination, however, makes smaller constituents irretrievable and large sources of error. Throughout shallow areas, the constituent’s relevancy changes. For example, near an amphidromic point where M2 relevance drops, so does the potential of satellite...poster 2022
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Simons, W.J.F. (author), Broerse, D.B.T. (author), Kleptsova, O.S. (author), Nijholt, N. (author), Pietrzak, J.D. (author), Naeije, M.C. (author), Lhermitte, S.L.M. (author), Visser, P.N.A.M. (author), Riva, R.E.M. (author)A devastating tsunami struck Palu Bay in the wake of the 28 September 2018 M<sub>w</sub> = 7.5 Palu earthquake (Sulawesi, Indonesia). With a predominantly strike-slip mechanism, the question remains whether this unexpected tsunami was generated by the earthquake itself, or rather by earthquake-induced landslides. In this study we examine the...journal article 2022
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van der Boog, C.G. (author), Molemaker, M. J. (author), Dijkstra, H. A. (author), Pietrzak, J.D. (author), Katsman, C.A. (author)Mesoscale anticyclonic eddies dominate the sea-surface height variability in the Caribbean Sea. Although it is well established that these anticyclones are formed near the eastern boundary of the Caribbean Sea, which is demarcated by the Lesser Antilles, the source of their anticyclonic vorticity remains unclear. To gain insight into this...journal article 2022
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van der Boog, C.G. (author), Dijkstra, Henk A. (author), Pietrzak, J.D. (author), Katsman, C.A. (author)Because of its pronounced fresh signature, the properties of the northward-flowing Antarctic Intermediate Water (AAIW) affect the Atlantic Meridional Overturning Circulation. Hence, understanding modifications of AAIW along its path is important. Here, we analyze AAIW changes along its path in the Caribbean Sea and assess whether vertical...journal article 2022
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Keyzer, L.M. (author), Mohammadloo, Tannaz H. (author), Snellen, M. (author), Pietrzak, J.D. (author), Katsman, C.A. (author), Afrasteh, Y. (author), Guarneri, H. (author), Verlaan, M. (author), Klees, R. (author), Slobbe, D.C. (author)The sound speed provides insight in ocean properties, as it depends on depth, temperature and salinity. Here, we propose a method to invert sound speed profiles (SSPs) from multibeam echosounder (MBES) measurements, providing a SSP for every ping. Using erroneous SSPs results in a mismatch in the estimated bathymetry between overlapping swaths....book chapter 2021
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Georgiou, S. (author), Ypma, S.L. (author), Brüggemann, N. (author), Sayol España, J.M. (author), van der Boog, C.G. (author), Spence, P. (author), Pietrzak, J.D. (author), Katsman, C.A. (author)The dense waters formed by wintertime convection in the Labrador Sea play a key role in setting the properties of the deep Atlantic Ocean. To understand how variability in their production might affect the Atlantic Meridional Overturning Circulation (AMOC) variability, it is essential to determine pathways and associated timescales of their...journal article 2021
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van der Boog, C.G. (author), Koetsier, J.O. (author), Dijkstra, Henk A. (author), Pietrzak, J.D. (author), Katsman, C.A. (author)Thermohaline staircases are associated with double-diffusive mixing. They are characterized by stepped structures consisting of mixed layers of typically tens of metres thick that are separated by much thinner interfaces. Through these interfaces enhanced diapycnal salt and heat transport take place. In this study, we present a global dataset...journal article 2021
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Afrasteh, Y. (author), Slobbe, D.C. (author), Verlaan, M. (author), Sacher, M. (author), Klees, R. (author), Guarneri, H. (author), Keyzer, L.M. (author), Pietrzak, J.D. (author), Snellen, M. (author), Zijl, F. (author)The first objective of this paper is to assess by means of geodetic network analyses the impact of adding model-based hydrodynamic leveling data to the Unified European Leveling Network (UELN) data on the precision and reliability of the European Vertical Reference Frame (EVRF). In doing so, we used variance information from the latest UELN...journal article 2021
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Rijnsburger, S. (author), Flores, Raúl P. (author), Pietrzak, J.D. (author), Horner-Devine, Alexander R. (author), Souza, Alejandro J. (author), Zijl, Firmijn (author)The Rhine region of freshwater influence (ROFI) is strongly stratified, rotational, relatively shallow and has large tides, resulting in a dynamic field of fronts that are formed by multiple processes. We use a 3D numerical model to obtain a conceptual picture of the frontal structure and the processes responsible for generating this multiple...journal article 2021
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Kleptsova, Olga S. (author), Dijkstra, Henk A. (author), van Westen, René M. (author), van der Boog, C.G. (author), Katsman, C.A. (author), James, Rebecca K. (author), Bouma, Tjeerd J. (author), Klees, R. (author), Riva, R.E.M. (author), Slobbe, D.C. (author), Zijlema, Marcel (author), Pietrzak, J.D. (author)Joint effects of the dynamic sea-level rise projected changes in the large-scale atmosphere/ocean circulation, and wave climate on hurricane-induced extreme water levels in the Caribbean region are assessed. We use the 2D-depth integrated ADCIRC + SWAN wave-ocean model, baroclinically coupled to an ocean-eddying version of the Community Earth...journal article 2021
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Rijnsburger, S. (author), Flores, Raúl P. (author), Pietrzak, J.D. (author), Lamb, Kevin G. (author), Jones, Nicole L. (author), Horner-Devine, Alexander R. (author), Souza, Alejandro J. (author)Remotely sensed images document the occurrence of multiple packets of internal solitary waves (ISWs) in the Rhine River plume at the same time. We use a combination of field observations, and non-hydrostatic and hydrostatic modeling to understand the processes that lead to the generation and retention of multiple ISW packets within the Rhine...journal article 2021
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James, R.K. (author), Lynch, A. (author), Herman, P.M.J. (author), van Katwijk, M.M. (author), van Tussenbroek, B.I. (author), Dijkstra, H.A. (author), van Westen, R. M. (author), van der Boog, C.G. (author), Klees, R. (author), Pietrzak, J.D. (author), Slobbe, D.C. (author), Bouma, T.J. (author)The intensity of major storm events generated within the Atlantic Basin is projected to rise with the warming of the oceans, which is likely to exacerbate coastal erosion. Nature-based flood defence has been proposed as a sustainable and effective solution to protect coastlines. However, the ability of natural ecosystems to withstand major...journal article 2021
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Keyzer, L.M. (author), Herman, P.M.J. (author), Smits, B.P. (author), Pietrzak, J.D. (author), James, R.K. (author), Candy, A.S. (author), Riva, R.E.M. (author), Bouma, T.J. (author), van der Boog, C.G. (author), Katsman, C.A. (author), Slobbe, D.C. (author), Zijlema, Marcel (author), van Westen, R.M. (author), Dijkstra, H.A. (author)Shallow tropical bays in the Caribbean, like Orient Bay and Galion Bay in Saint Martin, are often sheltered by coral reefs. In the relatively calm environment behind the reefs, seagrass meadows grow. Together, these ecosystems provide valuable ecosystem services like coastal protection, biodiversity hotspots, nursery grounds for animals and...journal article 2020
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Pathways of the water masses exiting the Labrador Sea: The importance of boundary–interior exchangesGeorgiou, S. (author), Ypma, S.L. (author), Brüggemann, N. (author), Sayol España, J.M. (author), Pietrzak, J.D. (author), Katsman, C.A. (author)The water masses exiting the Labrador Sea, and in particular the dense water mass formed by convection (i.e. Labrador Sea Water, LSW), are important components of the Atlantic Meridional Overturning Circulation (AMOC). Several studies have questioned the connection of the LSW production to the AMOC variability. This is partly due to the...journal article 2020
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Flores, Raúl P. (author), Rijnsburger, S. (author), Horner-Devine, Alexander R. (author), Kumar, Nirnimesh (author), Souza, Alejandro J. (author), Pietrzak, J.D. (author)This study investigates the influence of tidal straining in the generation of turbidity maximum zones (TMZ), which are observed to extend for tens of kilometers along some shallow, open coastal seas. Idealized numerical simulations are conducted to reproduce the cross-shore dynamics and tidal straining in regions of freshwater influence ...journal article 2020
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Ypma, S.L. (author), Spall, M. A. (author), Lambert, E. (author), Georgiou, S. (author), Pietrzak, J.D. (author), Katsman, C.A. (author)The Nordic seas are commonly described as a single basin to investigate their dynamics and sensitivity to environmental changes when using a theoretical framework. Here, we introduce a conceptual model for a two-basin marginal sea that better represents the Nordic seas geometry. In our conceptual model, the marginal sea is characterized by...journal article 2020