Browsing by Author "Vilà Guerau de Arellano, Jordi"

Now showing items 1-7 of 7

    • Automatic face recognition of video sequences using self-eigenfaces 

      Torres Urgell, Lluís; Lorente, Luis; Vilà Guerau de Arellano, Jordi (-, 2000)
      Conference report
      Open Access
      The objective of this work is to provide an efficient face recognition scheme useful for video indexing applications. In particular we are addressing the following problem: given a set of known images and given a video ...

    • Evolution of the turbulence during the afternoon transition of the convective boundary layer: a spectral analysis 

      Darbieu, Clara; Lohou, Fabienne; Lothon, Marie; Couvreux, Fleur; Pino González, David; Durand, Pierre; Blay Carreras, Estel; Vilà Guerau de Arellano, Jordi (American Meteorological Society, 2014)
      Conference report
      Open Access
      The transition from a well-mixed convective boundary layer to a residual layer overlying a stabilized nocturnal layer raises several issues, which remain difficult to address from both modeling and observational perspectives. ...

    • How do the surface energy fluxes change when a more realistic land cover is included in the WRF model? An evaluation using BLLAST data 

      Román-Gascón, C.; Lothon, Marie; Lohou, Fabienne; Hartogensis, Oscar; Vilà Guerau de Arellano, Jordi; Pino González, David; Yague, Carlos; Pardyjak, Eric (European Geosciences Union (EGU), 2021)
      Conference report
      Open Access
      Ideally, numerical weather prediction (NWP) and climate models should include a proper representation of the land surface to correctly simulate the surface energy fluxes and, ultimately, provide successful forecasts of ...

    • Role of the residual layer and large-scale subsidence on the development and evolution of the convective boundary layer 

      Blay Carreras, Estel; Pino González, David; Vilà Guerau de Arellano, Jordi; van de Boer, Anneke; de Coster, Olivier; Darbieu, Clara; Hartogensis, Oskar; Lohou, Fabienne; Lothon, Marie; Pietersen, Henk (2014-01-01)
      Article
      Open Access
      Observations, mixed-layer theory and the Dutch Large-Eddy Simulation model (DALES) are used to analyze the dynamics of the boundary layer during an intensive operational period (1 July 2011) of the Boundary Layer Late ...

    • Study of a prototypical convective boundary layer observed during BLLAST: contributions by large-scale forcings 

      Pietersen, Henk; Vilà Guerau de Arellano, Jordi; Augustin, P; van de Boer, Anneke; de Coster, Olivier; Delbarre, Hervé; Durand, Pierre; Fourmentin, M; Gioli, Beniamino; Hartogensis, Oskar; Lohou, Fabienne; Lothon, Marie; Ouwersloot, Huug; Pino González, David; Reuder, Joachim (2015-04-24)
      Article
      Open Access
      We study the influence of the large-scale at- mospheric contribution to the dynamics of the convective boundary layer (CBL) in a situation observed during the Boundary Layer Late Afternoon and ...

    • Surface representation impacts on turbulent heat fluxes in the weather research and forecasting (WRF) model (v.4.1.3) 

      Román-Gascón, C.; Lothon, Marie; Lohou, Fabienne; Hartogensis, Oscar; Vilà Guerau de Arellano, Jordi; Pino González, David; Yague, Carlos; Pardyjak, Eric (2021-06-29)
      Article
      Open Access
      The water and energy transfers at the interface between the Earth’s surface and the atmosphere should be correctly simulated in numerical weather and climate models. This implies the need for a realistic and accurate ...

    • Turbulence vertical structure of the boundary layer during the afternoon transition 

      Darbieu, Clara; Lohou, Fabienne; Lothon, Marie; Vilà Guerau de Arellano, Jordi; Couvreux, Fleur; Durand, Pierre; Pino González, David; Patton, Edward; Nilsson, Erik; Blay-Carreras, Estel; Gioli, Beniamino (2015-09-09)
      Article
      Open Access
      We investigate the decay of planetary boundary layer (PBL) turbulence in the afternoon, from the time the surface buoyancy flux starts to decrease until sunset. Dense observations of mean and turbulent parameters ...