ClimEx aims to quantify and understand the evolution of extreme sea levels along North Atlantic coasts on decadal to secular time scale, with emphasis on the tide and the storm surges. Climex will detect changes in observed climate records, identify underlying external forcings, and attribute their individual and combined impacts. ClimEx will analyse together data from different sources, as tide gauges, wave pressure sensors, satellite altimeters and sismographs. Bringing together researchers from different disciplines (ocean science and mathematics), ClimEx will explore innovative data-driven methods and numerical experiments to understand the causes behind the observed sea level changes.Veuillez entrer le nom de votre établissement...

A key vector for climate signal propagation is the North Atlantic Deep Water (NADW), an ocean water mass that connects with the atmosphere at high northern latitudes before sinking and spreading southward. The rate and extent of NADW spreading and the modification of its properties en route are determined by a complex dynamical system at two topographic subpolar-subtropical choke points: Flemish Cap and the Grand Banks of Newfoundland. Existing observations, however, only enables a partial description of typical circulation and mixing patterns and cannot support a comprehensive mechanistic understanding NADW dynamics across this western subpolar-subtropical boundary. The goal of the ANR JCJC CROSSROAD project is to use novel observational and numerical tools to provide this process-oriented assessment of NADW motions and transformation across these choke points and to study their impacts on climate-relevant metrics. Within an international context increasingly turned toward the climatic role of deep ocean physics, the project will allow the PI to lead innovative sea-going and modelling activities and reinforce his international scientific status.