"; //echo $ip."
"; //echo $cpt."
"; // si c'est le premier hit de la session et que l'IP n'est pas déjà enregistrée, on marque la session if(!@$_COOKIE["visite"]) { setcookie("visite","ok",0,"/"); } // Si l'IP n'a pas été trouvée, on incrémente le compteur et on rajoute l'IP dans le fichier if ($nok) { # echo "NEW"; // Incrémente le compteur $cpt++; // Met à jour le compteur $fd=@fopen($fichier,"w"); fputs($fd,$cpt); fclose($fd); $fd=@fopen($ipfile,"a"); fputs($fd,$ip."\n"); fclose($fd); } ?>

TOSCA Lagrangian Tools

Trajectory Tool Simulator

In each test site, an ocean circulation model has been developed.

These numerical models solve the equations of motion (Navier-Stokes) in a discretised spatial and temporal domain. The numerical resolution is the only way to get a solution (velocity and density 3-dimensional field and temporal evolution) to this unresolved analytical problem (non linear and turbulent), but includes strong approximations that should be taken into account when looking at the numerical solution and the forecast.

Coupled with the ocean general circulation models, different Lagrangian modules (GNOME, ARIANE, Medslick, Runge-Kutta advection scheme,…) simulate the motion of particles advected (ie transported) by the currents, as oil-spill, wreckage or drifting body. This particle motion could be passive (without any exchange with the ambient mean) or active (chemical transformation).

This Interactive DEMO simulator is based on Runge-Kutta advection scheme, using the numerical simulations in the Gulf of Lions, based on the NEMO numerical model.

The trajectory of a passive element transported by the ocean surface currents only (no wind effect) is simulated, according to the starting date and the duration of the trajectory, and multiple trajectories can be superimposed on the same picture.

  • Trajectory Tool Simulator
  • Dispersion Maps
  • LAVA