Dr Navid Constantinou

Contacts
I grew up in Cyprus. I am a physicist at heart and I'm fascinated with geophysical fluid dynamics. I got my Ph.D. from the National and Kapodistrian University in Greece working on planetary atmosphere dynamics. Then, I was awarded a NOAA Climate & Global Change postdoctoral fellowship (2015-2017) to go at the Scripps Institution of Oceanography, University of California San Diego. I joined ANU as part of the ARC Centre of Excellence for Climate Extremes in May 2018. I received a Discovery Early Career Researcher Award from the Australian Research Council to work on machine learning and ocean eddy parametrizations, a project that commenced on June 2021.
I am passionate and heavily involved in open-source software and climate model development. As part of the Climate Modelling Alliance we are developing a climate model that runs on Graphical Processing Units (GPUs) and achieves unprecedented speedups compared to state-of-the-art climate models.
Besides research and coding I enjoy surfing 🏄🏽, biking 🚲, horse riding 🐎, dancing 💃🏼. I like telling stories and I am an avid story listener. Whenever I get the chance I jump into the ocean in person.
Read more on my personal website or have a look at my github profile.
Research interests
physical oceanography, geophysical fluid dynamics, fluid mechanics, machine learning, atmospheric dynamics, climate
Read more at my personal website.
Groups
- Researcher, Climate and Fluid Physics
Projects
- Principal investigator, Ocean modelling with graphical processing units (GPUs)
- Supervisor, Climate & Fluid Physics
- Supervisor, Ocean modelling with graphical processing units (GPUs)
- Supervisor, Southern Ocean Circulation
Submitted/In review
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Strong-Wright, J., Chen, S., Constantinou, N. C., Silvestri, S., Wagner, G. L., and Taylor, J. R. (2023). OceanBioME.jl: A flexible environment for modelling the coupled interactions between ocean biogeochemistry and physics. J. Open Source Softw. (submitted on Jun 2023; open review) code repository package documentation pdf
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Wagner, G. L., Hillier, A., Constantinou, N. C., Silvestri, S., Souza, A., Burns, K., Ramadhan, A., Hill, C., Campin, J.-M., Marshall, J., and Ferrari, R. (2023) CATKE: a turbulent-kinetic-energy-based parameterization for ocean microturbulence with dynamic convective adjustment. J. Adv. Model. Earth Sy. (submitted on June 2023; doi:10.48550/arXiv.2306.13204) doi pdf
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Bennetts, L. G., Shakespeare, C. J., Vreugdenhil, C. A., Foppert, A., Gayen, B., Meyer, A., Morrison, A. K., Padman, L., Phillips, H. E., Stevens, C. L., Toffoli, A., Constantinou, N. C., Cusack, J., Cyriak, A., Doddridge, E. W., Domingues, C. M., England, M. H., Evans, D. G., Heil, P., Hogg, A. McC., Holmes, R. M., Huneke, W. G. C., Jones, N. L., Keating, S. R., Kiss, A. E., Kraitzman, N., Malyarenko, A., McConnochie, C. D., Meucci, A., Montiel, F., Neme, J., Nikurashin, M., Patel, R. S., Peng, J.-P., Rayson, M., Rosevear, M. G., Sohail, T., Spence, P., Stanley, G. J. (2023) Closing the loops on Southern Ocean dynamics: From the circumpolar current to ice shelves and from bottom mixing to surface waves. Rev. Geophys. (submitted on May 2023; doi:10.22541/essoar.168882017.73914213/v1) doi pdf
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Ong, E. Q. Y., Doddridge, E. W., Constantinou, N. C., England, M. H., and Hogg, A. McC. (2023) Episodic Antarctic shelf intrusions of circumpolar deep water via canyons. J. Phys. Oceanogr., (submitted on April 2023; doi:10.48550/arXiv.2304.13225) doi pdf
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Constantinou, N. C., Rocha, C. B., Llewellyn Smith, S. G., and Young, W. R. (2023) Nusselt number scaling in horizontal convection. J. Fluid Mech. (submitted on January 2023, revised on June 2023; arXiv:2301.03122). doi pdf
- Wagner, G. L., Constantinou, N. C., and Reich, B. G. (2023) Stokes drift should not be added to ocean general circulation model velocities. Geophys. Res. Lett., (submitted on Oct. 2022, revised on Apr 2023; arXiv:2210.08552). doi pdf
Published/In press
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Bhagtani, D., Hogg, A. McC., Holmes, R. M., and Constantinou, N. C. (2023) Surface heating steers planetary-scale ocean circulation., J. Phys. Oceanogr., (in press; doi:10.1175/JPO-D-23-0016.1) doi pdf
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Hogg, A. McC., Penduff, T., Close, S. E., Dewar, W. K., Constantinou, N. C., and Martínez-Moreno, J. (2022) Circumpolar variations in the chaotic nature of Southern Ocean eddy dynamics. J. Geophys. Res.-Oceans, 127, e2022JC018440. doi pdf
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Wagner, T. J. W., Eisenman, I., Ceroli, A. M., and Constantinou, N. C. (2022) How winds and ocean currents influence the drift of floating objects. J. Phys. Oceanogr., 52(5), 907-916. doi pdf
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Constantinou, N. C. and Hogg, A. McC. (2021) Intrinsic oceanic decadal variability of upper-ocean heat content. J. Climate, 34 (15), 6175-6189. datasets and notebooks doi pdf
(Featured in the CLEx press news.) -
Martínez-Moreno, J., Hogg, A. McC., England, M. H., Constantinou, N. C., Kiss, A. E., and Morrison, A. K. (2021). Global changes in oceanic mesoscale currents over the satellite altimetry record. Nat. Clim. Chang., 11, 397-403. doi pdf
(Featured in the CLEX press news; also read about it in The Conversation. Selection of press coverage: The Guardian, The Sydney Morning Herald, Cosmos Magazine.) -
Constantinou, N. C., Wagner, G. L., Siegelman, L, Pearson, B. C., and Palóczy, A. (2021). GeophysicalFlows.jl: Solvers for geophysical fluid dynamics problems in periodic domains on CPUs & GPUs. J. Open Source Softw. 6 (60), 03053. code repository package documentation doi pdf
(Featured in the CLEX press news; read also the related blog post.) -
Lozano-Durán, A., Constantinou, N. C., Nikolaidis, M.-A., and Karp, M. (2021). Cause-and-effect of linear mechanisms sustaining wall turbulence. J. Fluid Mech., 914, A8. doi pdf
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Lozano-Durán, A., Nikolaidis, M.-A., Constantinou, N. C., and Karp, M. (2020). Alternative physics to understand wall turbulence: Navier–Stokes equations with modified linear dynamics. J. Phys.: Conf. Ser., 1522, 012003. doi pdf
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Rocha, C. B., Constantinou, N. C., Llewellyn Smith, S. G., and Young, W. R. (2020). The Nusselt numbers of horizontal convection. J. Fluid Mech. 894, A24. doi pdf
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Constantinou, N. C. and Hogg, A. McC. (2019). Eddy saturation of the Southern Ocean: a baroclinic versus barotropic perspective. Geophys. Res. Lett., 46, 12202-12212. [datasets and notebooks; model animation] doi pdf
(best Early Career Researcher paper within CLEx for year 2019) -
Martínez-Moreno, J., Hogg, A. McC., Kiss, A. E., Constantinou, N. C., and Morrison, A. K. (2019). Kinetic energy of eddy-like features from sea surface altimetry. J. Adv. Model. Earth Sy., 11 (10), 3090-3105. doi pdf
(Featured in the CLEx press news.) -
Parker, J. B. and Constantinou, N. C. (2019). Magnetic eddy viscosity of mean shear flows in two-dimensional magnetohydrodynamics. Phys. Rev. Fluids, 4, 083701. doi pdf
(Featured in the ANU and LLNL press news.) -
Bakas, N. A., Constantinou, N. C., and P. J. Ioannou (2019). Statistical state dynamics of weak jets in barotropic beta-plane turbulence. J. Atmos. Sci., 76 (3), 919-945. doi pdf
(Featured in the CLEx press news.) -
Constantinou, N. C. and Parker, J. B. (2018). Magnetic suppression of zonal flows on a beta plane. Astrophys. J., 863, 46. doi pdf
(Featured in the ANU, LLNL, and CLEx press news; also read about it in The Conversation.) -
Constantinou, N. C. (2018). A barotropic model of eddy saturation. J. Phys. Oceanogr., 48 (2), 397-411 doi pdf
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Constantinou, N. C. and Young, W. R. (2017). Beta-plane turbulence above monoscale topography. J. Fluid. Mech., 827, 415-447. doi pdf
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Farrell, B. F., Ioannou, P. J., Jiménez, J., Constantinou, N.C., Lozano-Durán, A., and Nikolaidis, M.-A. (2016). A statistical state dynamics-based study of the structure and mechanism of large-scale motions in plane Poiseuille flow. J. Fluid. Mech., 809, 290-315. doi pdf
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Constantinou, N. C., Farrell, B. F., and Ioannou, P. J. (2016). Statistical state dynamics of jet—wave coexistence in barotropic beta-plane turbulence. J. Atmos. Sci., 73 (5), 2229-2253. doi pdf
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Bakas, N. A., Constantinou, N. C., and Ioannou, P. J. (2015). S3T stability of the homogeneous state of barotropic beta-plane turbulence. J. Atmos. Sci., 72 (5), 1689-1712. doi pdf
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Constantinou, N. C., Lozano-Durán, A., Nikolaidis, M.-A., Farrell, B. F., Ioannou, P. J., and Jiménez J. (2014). Turbulence in the highly restricted dynamics of a closure at second order: comparison with DNS. J. Phys.: Conf. Ser., 506, 012004. doi pdf
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Constantinou, N. C., Farrell, B. F., and Ioannou, P. J. (2014). Emergence and equilibration of jets in beta-plane turbulence: applications of Stochastic Structural Stability Theory, J. Atmos. Sci., 71 (5), 1818-1842. doi pdf
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Constantinou, N. C. and Ioannou, P. J. (2011). Optimal excitation of two dimensional Holmboe instabilities. Phys. Fluids, 23, 074102. doi pdf
Grey Literature
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Miller, J. W., O’Neil, C., Constantinou, N. C., and Anzecot, O. (2022). Eigenvalue initialisation and regularisation for Koopman autoencoders. arXiv doi pdf
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Lozano-Durán, A., Nikolaidis, M.-A., Constantinou, N. C., and Karp, M. (2019) Wall turbulence without modal instability of the streaks. arXiv pdf
Teaching
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Computational Geosciences (EMSC4033/EMSC8033), Semester 1, 2021, 2022, 2023
Lecturer and co-convener (w/ Louis Moresi)
Class Github Repository and Online Book -
Instabilities in fluids (EMSC3050/EMSC4050/EMSC8014), Semester 2, 2018
Lecturer and convener
Class Website
Students
Ph.D. students
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Ellie Ong
February 2021 - ; University of New South Wales
Investigation into local drivers of change at the Antarctic continental margin -
Dhruv Bhagtani
October 2020 - ; Australian National University
The interplay between wind stress and surface buoyancy in driving large-scale oceanic gyres
Masters/Honours
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Elise Palethorpe
February 2022 - November 2022; Australian National University (Honours)
Implementing a multigrid pressure solver in CliMA’s ocean general circulation model
First Class Honours
Undergraduate students
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Phoebe Grosser
December 2022 - March 2023; Australian National University (2nd year)
Ocean’s tidal response with high-fidelity bathymetry and investigation on physical mechanisms -
Jack Miller
July 2022 - December 2022; Australian National University (2nd year)
Modeling with Koopman Autoencoders for Data Synthesis with application to cyclones -
Oliver Balfour
February 2022 - June 2022; Australian National University (2nd year undergraduate)
Predicting cyclone genesis, trajectory, and intensity with machine learning -
Jack Miller
February 2022 - June 2022; Australian National University (2nd year undergraduate)
Predicting cyclone genesis, trajectory, and intensity with machine learning -
Elise Palethorpe
July 2020 - November 2020; Australian National University (2nd year undergraduate)
Numerical methods for partial differential equations: high-order accurate weighted essentially non-oscillatory (WENO) schemes -
Fabian Antonio Circelli
November 2019 - February 2020; Australian National University (3rd year undergraduate)
Fourier-based pseudospectral methods for solving partial differential equations