Observations of transient tracer distribution provide essential information on ocean ventilation. The use of several commonly used transient traces is impeded as their atmospheric mole fractions are decreasing with time. Here we explore new potential oceanic transient tracers with a novel analytical system that simultaneous measures a large range of compounds. Combined with the known atmospheric history and seawater solubility we discuss the utility of selected HCFC, HFC and PFC as tracers.

Coastal regions play a significant role in global processes. Numerical models are one of the major instruments in understanding ocean dynamics. The main objective of this article is to demonstrate the representativeness of the simulations with the new FESOM-C model by comparing the results with observational data for the southeastern part of the North Sea. An equally important objective is to present the application of convergence analysis of solutions for grids of different spatial resolutions.

The diel vertical migration of zooplankton considered the largest daily migration of biomass on earth. This study investigates zooplankton distribution, dynamics and factors controlling them during open water and ice cover periods in Hudson Bay, a large, seasonally-ice covered Canadian inland sea. The presented data constitutes a first-ever observed presence of diel vertical migration of zooplankton in Hudson Bay during winter as well as its interaction with the tidal dynamics.

Our main aim is to study the feasibility of reconstructing oceanic currents extending the data obtained from coastal multiplatform observatories to nearby areas in 3D in the SE Bay of Biscay. To that end, two different data-reconstruction methods with different approaches were tested, providing satisfactory results. This work is a first step towards the real applicability of these methods in this study area and shows the method’s capabilities for a wide range of applications.

This paper focuses on internal tides in the marginal Solomon Sea where LLWBCs transit. The objective is to characterise such internal tides and to give som insights on their impacts on water mass transformation in this area of interest for the global circulation. Results are discussed for two contrasted ENSO conditions with different mesoscale activity and stratification. Such study is motivated by the next altimetric SWOT mission that will be able to observe such phenomena.

We show that under strong global warming, meltwater discharge form the Greenland ice sheet leads to a weakening of both the expected nutrient decline on the Northwest European Shelf and the reduction of the biological primary production. Due to the impact of the meltwater discharge on the meridional overturning circulation, Atlantic water masses of deeper levels become richer in nutrients and thus increase the nutrient concentration of the water masses transferred to open shelf areas.

The exchange between the Humboldt and Patagonian Large Marine Ecosystems, the largest marine ecosystems of Southern Hemisphere, is investigated from numerical simulations. Most of the southern Patagonian shelf waters originate from the South Pacific's upper layer. The exchange takes place mainly through the shelf-break via Cape Horn Shelf. The interannual variability of the shelf exchange is partly explained by the large-scale wind variability and associated with the Southern Anular Mode.

The ocean can regulate climate by distributing heat and carbon dioxide into its interior. This work has resulted from a major experiment aimed at understanding how that distribution occurs. In the experiment an artificial tracer was released into the ocean. After release the tracer was tracked as it was distorted by ocean currents. Using novel methods we reveal how the tracer's distortions follow the movement of the underlying water masses in the ocean.

With present-day techniques, ocean surface currents are poorly known near the Equator and globally for spatial scales under 200 km and time scales under 30 days. Alternative wide-swath radar pulse-pair Doppler measurements can be used. This direct velocity measurement contains radar motions, waves and currents. These contributions are measured and simulated for the ocean conditions recorded during the DRIFT4SKIM experiment, demonstrating the capability to measure currents from space globally.

The main objective of the study is to analize export of carbon to open ocean from the rich waters of the upwelling system of North Africa. South of Canary Islands the permanent upwelling interacts with others physical processes impacting on the main biogeochemical processes. Taking advantage of two cruises data contrated with the outputs of models, important conclusions on the seasonal variability of this area are obtained which is largely related with changes of the Frontal Zone of Cape Verde.