Relative dispersion and scales of motions in the coastal ocean

– Alexei SENTCHEV – Professeur au Laboratoire d’Océanologie et de Géosciences, UMR 8187-LOG, Wimereux –

Abstract : Relative dispersion is used in many practical applications for understanding and predicting pathways and rates of spreading of pollutants, biological quantities in the ocean. Estimation of the dispersion is conventionally performed in the Lagrangian framework, i.e. using a multitude of trajectories of the water parcels. We investigated the relative dispersion properties in the Gulf of Tonkin, a shallow water semi-enclosed region, where the monsoon winds and the fresh-water inputs create a circulation pattern characterized by large variability with a hierarchy of scales of motions. We quantified the scales of motions from Lagrangian tracking experiments involving the model simulations and remotely sensed velocity fields. We investigated the limits of the approach used and asked the question: What can we do more? How can we improve the knowledge of physical processes of different scales responsible for different dispersion regimes and how to approach the truth?

Lien webinaire : https://cnrs.zoom.us/j/94793696716?pwd=YVJvcE5zaGppQWthMmhWQVpLOFBOdz09

ID de réunion : 947 9369 6716

Code secret : Q8z2yW