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BC3 Seminar: “Dimensionality reduction for the ocean wave dynamics”

December 20, 2017 @ 12:00 pm - 1:00 pm

BC3 Seminars
“Dimensionality reduction for the ocean wave dynamics”

Prof. Leandro Farina
Universidade Federal do Rio Grande do Sul, Brasil

Abstract: The large amount of spatiotemporal data used in ocean wave modelling can be analysed by dimensionality reduction techniques. Firstly, the use of empirical orthogonal functions and singular value decomposition show how global predictions of ocean waves can be better understood. In particular, it is seen that the total wave field obtained from wave model simulations can be reduced into a few dominant modes expressing the aspects of the global wave climate and relationships between the atmosphere and the ocean.

We then employ a generalised concept of ensemble dimension to the dynamics of ocean waves, aiming at establishing the regions of the globe´s oceans which have lower/higher local dimensionality. Bred vectors of surface winds, obtained by a global atmospheric ensemble system, are employed and used as forcings of multiple runs of the WAM wave model. Ensemble members of an ocean wave ensemble prediction system is then used to compute the ensemble dimension of the ocean waves. The numerical results show the local low dimensionality of the significant wave height, swell height and peak period as well as the ensemble spread of the wind fields used in the experiment.

Short CV or profile

  • Ph.D. in Applied Maths from the University of Manchester, UK.
  • Postdoctoral fellow in the IFP, Energies Nouvelles, France.
  • Postdoc in the Ocean Engineering Department and in the Research Laboratory of Electronics of the Massachusetts Institute of Technology (MIT), USA.
  • Researcher at CPTEC/INPE, Cachoeira Paulista, Brazil.
  • Professor at UFRGS, Porto Alegre, Brazil.

Research interests

  • Ocean wave modelling
  • Interaction of water waves with obstacles
  • Spectral methods for integral equations

Personal webpage

Leandro Farina | Universidade Federal do Rio Grande do Sul (UFRGS) | ResearchGate

Sede Building (Room Aketxe), Scientific Park of the University of the Basque Country, December 20, 12:00-13:00

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Details

Date:
December 20, 2017
Time:
12:00 pm - 1:00 pm
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Venue

BC3-Basque Centre for Climate Change
Sede Building 1, 1st floor, Scientific Park of the University of the Basque Country
Leioa, Bizkaia 48940 Spain
Phone:
+34 944 014 690
Website:
http://www.bc3research.org

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