The CHOC team groups scientists, technicians and engineers who study the impact of climate and other external factors such as continental and atmospheric inputs, hydrothermalism and anthropogenic activities, on biogeochemical cycles and marine organisms. CHOC projects include both experimental investigations and field studies over various spatial scales, from the Mediterranean littorals to the tropical Pacific, the Arctic ocean, and the global scale.

The explored timescales are varied too, from seasonal effects to pluriannual and ancient geological cycles. Our methods essentially rely on chemical and isotope approaches: from fine analyses of ocean pH and carbonate chemistry, to concentrations of trace metals, and isotope compositions of carbon, nitrogen and non-conventional isotopes.

Transdisciplinary projects, through collaborations with biologists, ecologists and ecotoxicologists, aim at proposing sophisticated modeling of key processes, as well as their impact and their temporal evolution. Some CHOC members are also strongly involved in the long-term coastal Observation through national and international networks (SOMLIT, COAST HF, PHYTOBS et JERICO NEXT).