NAUTILOS will fill in existing marine observation and modelling gaps through the development of a new generation of cost-effective sensors and samplers for physical (salinity, temperature), chemical (inorganic carbon, nutrients, oxygen), and biological (phytoplankton, zooplankton, marine mammals) essential ocean variables, in addition to micro-/nano-plastics, to improve our understanding of environmental change and anthropogenic impacts related to aquaculture, fisheries, and marine litter. Newly developed marine technologies will be integrated with different observing platforms and deployed through the use of novel approaches in a broad range of key environmental settings (e.g. from shore to deep-sea deployments) and EU policy-relevant applications: - Fisheries & Aquaculture Observing Systems, - Platforms of Opportunity demonstrations, - Augmented Observing Systems demonstration, - Demonstrations on ARGO Platform, - Animal-borne Instruments. The fundamental aim of the project will be to complement and expand current European observation tools and services, to obtain a collection of data at a much higher spatial resolution and temporal regularity and length than currently available at the European scale, and to further enable and democratise the monitoring of the marine environment to both traditional and non-traditional data users. The principles that underlie the NAUTILOS project will be those of the development, integration, validation and demonstration of new cutting-edge technologies with regards to sensors, interoperability and embedding skills. The development will always be guided by the objectives of scalability, modularity, cost-effectiveness and open-source availability of software and data products produced. NAUTILOS will also provide full and open data feed towards well-established portals and data integrators (EMODnet, CMEMS, JERICO).

The ocean is key in the global C cycle, taking up ca. 25% of the CO2 we emit, slowing climate change and giving us more time to mitigate and adapt to climate change. The Ocean C Value Chain (VC) of observations, data QC & analysis delivers key information around this to decision makers such as the Conference of the Parties. The RIs play a pivotal role in the VC via their ability to operate at scale & pool resources to ensure common data standards and operational practices. The urgency of the climate crisis drives us to put this VC on a much more robust footing with the World Meteorological Organisation leading the planning of a Global Greenhouse Gas Watch (G3W) covering all components of the Earth System. Unfortunately the VC currently delivers estimates of Ocean C uptake much larger than those from models, leading to a damaged ability to manage climate change. However further work suggests that observations at a much higher density in the Southern Ocean (SO) would substantially resolve this issue. Our ability to deliver these via ships is limited by the small number that enter the SO and we therefore need many more observations from research vessels, citizen science platforms, autonomous robotic floats & surface platforms. This step change requires substantial technological innovation and complex data synthesis. TRICUSO will address these needs by a) improving the sensing technologies on floats and small uncrewed surface vessels, b) supporting citizen science on yachts and potentially cruise and expedition vessels, c) integrating biological observations into the work flow, d) improving data flows to scientists, e) evaluating the density of observations needed & f) proposing fit for purpose governance structures that allow the RIs to operate within the G3W. These actions will enable us to have a much firmer grip of how and why Ocean Carbon uptake varies and thus a much firmer evidence base on which to make decisions around managing climate change impacts.

OCEANSensor draws together European companies and research organisations developing, marketing and deploying marine biogeochemical sensors. OCEANSensor aims to improve and utilise the latest sensor, platform and communication technologies for marine biogeochemical observations. The project will refine existing sensor technologies, develop new applications, and demonstrate complete technology solutions for new, in situ marine sensors and observation systems for biogeochemical parameters in coastal and oceanic waters. The outcome of OCEANSensor will be a suite of marine in situ sensors for pH, pCO2 and O2 (fluorescent optodes), nitrate (UV hyperspectral), phosphate and silicate (electrochemical), and phosphate and ammonium (lab-on-chip technology) with upgraded Technology Readiness Levels and featuring enhanced metrological performance. The project will combine the new sensor technologies with those commercially available, and develop novel observatory packages for novel remote applications in marine systems. We will develop and demonstrate a novel benthic flux quantification system to be deployed for example for carbon capture and storage CO2 leakage monitoring. In addition, we will demonstrate the sensors for water quality and biogeochemical observations on platforms including moorings, ARGO floats, surface roaming vehicles and an easily accessible cabled observatory. The project will contribute to the successful implementation of the EU Marine Strategy Framework Directive and United Nation´s Sustainable Development Goal (SDG) 14. A key goal is to open up new application fields of the technologies, and cover a larger community of end-users. OCEANSensor will strengthen the position of European industry and research organisations working with biogeochemical sensors.

The ocean is a major component of the global carbon cycle absorbing about a quarter of anthropogenic CO2 emissions every year, modulating the rate of accumulation of carbon in the atmosphere and hence global warming. Increased levels of CO2 in the ocean cause a decline in seawater pH, also known as ocean acidification, with now well-known potential ecological consequences. Sustained, long-term in situ observations are, therefore, crucial to better understand and predict the impact of climate change on ocean ecosystems, increase resilience and develop sound mitigation and adaptation strategies. Furthermore, long-term sustained in situ ocean observations are required to support environmental and climate policies, such as the European Green Deal, and related policies aiming to reach net zero carbon and achieve a sustainable blue economy. To meet this challenge, GEORGE will advance the global technological competitiveness of European ocean observing research infrastructures (EMSO, ICOS, Euro-Argo) through the development and demonstration of a state-of-the-art biogeochemical, multi-platform observing system for characterisation of the ocean carbon system. GEORGE will advance the technology readiness level of novel sensors enabling for the first time systematic autonomous, in situ seawater CO2 system characterisation, and CO2 fluxes on moving and fixed platforms. These sensors will be integrated on state-of-the-art platforms augmented with the latest in autonomous technology enabling new observing capability. Technologies, methods and SOPs for carbon observing will be harmonised across a framework for multi-platform, cross-ERIC ocean observing, from sensor to data repositories. GEORGE will build capacity in ERICs through the provision of training in the use of new technologies and SOPs on data handling and reporting to staff and member organisations. Technology will be co-developed between industry and ERICs ensuring direct route to market and potential for scalability.