CoastPredict UN Ocean Decade Programme represents a cutting-edge initiative that integrates scientific advancements in coastal ocean observing and predicting with the aim of developing applications to support coastal resilience. CoastPredict will support multi-hazard early warning systems, climate risk assessment, and digital twins of the coastal ocean for ecosystems and environmental management and climate adaptation, by integrating observational data from satellites, existing in situ networks, Internet of Things (IoT) sensors, and citizen science into coastal models, and using Artificial Intelligence (AI) and Machine Learning (ML) tools to underpin risk mitigation and resilience strategies.

The development of a flexible and interoperable 'GlobalCoast' distributed cloud infrastructure, will link a network of regional and Pilot Site data spaces and existing repositories—such as EMODnet, Copernicus —through a federated system with orchestrated workflows that will provide a cloud-based platform for high-resolution data sharing and analytic tools to ultimately bridge the end-to-end value chain from oceanographic data to user-focused applications. This system will enhance interoperability and real-time access to diverse data including from satellites and cost-effective in situ instruments, and will provide cloud-based computing capacity. 

The infrastructure will allow for scalable, region-specific cloud platforms, each tailored with customised models and high-resolution simulations for local needs. Furthermore it will support sharing and adaptation of existing prototypes for other regions, for example climate downscaling for risk assessment in the Adriatic Sea, multi-risk early warning systems for extreme events in the Savannah region, and digital twins for nature-based solutions in Italy’s Emilia-Romagna region. Utilising Application Programming Interfaces (APIs), AI and ML driven services, CoastPredict’s cloud framework will enable adaptive, localised modelling, such as storm surge predictions and marine heat wave tracking, offering end users—including researchers, environmental managers, and coastal communities—actionable insights in response to evolving climate risks. 

*This abstract is proposed for IOC Session 1 - From science to shoreline: bridging knowledge,  policy and action for coastal resilience. 

How to cite: Coppini, G., Charcos Llorens, M., Kourafalou, V., La Rocca, G., Nassisi, P., O'Donovan, M., Pinardi, N., Tintoré, J., and Heslop, E.: CoastPredict: Advancing Coastal Resilience through Integrated Observation, Prediction, and Cloud-Based Solutions, One Ocean Science Congress 2025, Nice, France, 3–6 Jun 2025, OOS2025-1232, https://doi.org/10.5194/oos2025-1232, 2025.

The ‘Ocean Rise & Coastal Resilience Coalition’ led by the Ocean & Climate Platform, the Government of France, and the City of Nice will be launched a the UNOC3. It aims (1) to provide a platform for achieving better collaboration at every stage of the adaptation process for coastal cities and regions, by uniting coastal cities and regions representatives, international, regional and national networks of local authorities, financial intermediaries, scientific institutions and experts, civil society organizations, and land-use planners; (2) to advocate for the interests of coastal cities and regions, strengthening their representation and leadership in international political forums, conferences and summits.

Among the three thematical priorities of the Coalition, one is to strengthen scientific cooperation and data access and sharing, to help cities and regions gain a better understanding of the challenges and scenarios for the future. In a context of great climate uncertainty, it is vital for coastal cities and regions to improve and extend local data collection, observation and climate projections, while drawing on multiple knowledge systems, including local and indigenous, to feed systemic models and inform decision.

At the Ocean Ocean Science Congress, the Ocean & Climate Platform (OCP) would like to present the conclusion of the work realized under a working group, let by the IOC-UNESCO and the OCP, aiming to define how the Ocean Rise & Coastal Resilience Coalition can best support coastal cities and regions in the production and use of knowledge.

The main deliverable will allow: 

• Continuous assessment of scientific literature: Conduct rolling reviews to update coastal resilience needs from a multidisciplinary perspective, in collaboration with non-academic knowledge holders.
• Enhancing space infrastructure capabilities: Strengthen capabilities that support advanced services using space-based tools to address coastal resilience challenges.
• Leveraging AI, cloud systems, and advanced sensor technologies: Harness emerging technologies to allow communities to access expert support equitably, for example, assistance in drafting grant proposals.
• Encouraging civic engagement: Recognize the importance of citizen science and ocean literacy in fostering active civic participation in coastal resilience efforts.
• Building on existing initiatives: Coordinate local, national, and regional initiatives to overcome collaboration and data-sharing challenges. To achieve this, synthesize existing data-sharing tools 

How to cite: Bongarts Lebbe, T. and Brun, V.: Ocean Rise & Coastal Resilience Coalition for Cities and Regions: How to put scientific knowledge at the core of local decision in the context of coastal adaptation to ocean changes, One Ocean Science Congress 2025, Nice, France, 3–6 Jun 2025, OOS2025-314, https://doi.org/10.5194/oos2025-314, 2025.

IOC Session 1: The Land-Sea Interface is physically dynamic and also biogeochemically important.  Communities and urban areas are concentrated at our coastlines, and those people and their property as well as commercial and transportation infrastructure are at risk from coastal natural hazards.  Scientific research and resiliency planning mean useful tools like quality satellite data are in demand.  The Committee on Earth Observation Satellites (CEOS) Coastal Observation Applications Services and Tools Virtual Constellation (COAST-VC) make novel coastal satellite-derived data products and information publicly available and we are an endorsed UN Ocean Decade Contribution.   Our coastally-focused satellite work represents a unique international, intergovernmental, and interagency scientific collaboration dedicated to better meeting coastal decision-makers needs.

CEOS COAST satellite-derived data products are useful for: estuarine and coastal high-resolution Sea Surface Temperature monitoring (including in polar regions), shoreline mapping and evolution,  intertidal bathymetry for maritime safety and resource protection, coastal flooding and inundation monitoring, sea level rise/coastal vulnerability, water clarity assessment, marsh mapping and invasive species removal, critical habitat protection and restoration efforts and aquaculture lease siting, and post-storm impact assessment. This presentation will show coastal satellite data products and relevant use cases for applying this information to decision-making.  The presentation will also introduce users to where to access CEOS COAST information for customized use.  Related Town Hall, Tutorial, and other talks and posters will be cross-promoted during this presentation.

How to cite: Neely, M. and Carbonniere, A.: Cutting-Edge Coastal Satellite Information for Decision-making from CEOS COAST, One Ocean Science Congress 2025, Nice, France, 3–6 Jun 2025, OOS2025-794, https://doi.org/10.5194/oos2025-794, 2025.

The Reef Islands Initiative is the largest coastal rehabilitation projects of its kind in the southern hemisphere – bringing together scientists, Traditional Owners, local tourism leaders, governments and the community to protect and restore a network of critical island habitats along the length of the Great Barrier Reef World Heritage Area. Underway since 2015, the program is working across multiple habitats on the coastal mainland and islands to pilot and scale terrestrial and marine restoration techniques with the aim to enhance the resilience of these biodiversity bright spots and to build local capacity for long-term community-led ecosystem stewardship.

To date the program has doubled the nesting area for Green Sea Turtles resulting in a projected additional 640,000 turtle hatchlings; a scaled Pisonia Forest revegetation on a heavily disturbed remote coral cay to restore one of the Great Barrier Reef's most critical seabird nesting habitats; building capacity of 500+ volunteers and community stakeholders as coral restoration practitioners using a novel coral restoration technique (coral larvae re-seeding) to develop and test regulatory pathways to assist with scaling.

These projects have been designed and prioritised using best available science and have been delivered using a collaborative place-based model and multitiered governance arrangements to encourage local buy-in and power-sharing to support implementation and legacy. Plus, strategic alignment with regional priorities and Government and regulator support.

In this presentation we will share lessons learned from project design and implementation of marine and terrestrial restoration projects via science-tourism and private-public sector partnership models.

How to cite: Marsden, A. and Fyffe, T.: A multi-stakeholder approach to delivering resilience through coastal and island restoration on the Great Barrier Reef, One Ocean Science Congress 2025, Nice, France, 3–6 Jun 2025, OOS2025-282, https://doi.org/10.5194/oos2025-282, 2025.

Though an infrequent threat, tsunamis might have devastating effects in any coast in the world. Since 1746, Costa Rica has registered 42 tsunamis from local and distant sources in both shores, Pacific and Caribbean. At least 15 of those tsunamis caused damaging currents and/or flooding, and one caused at least three deaths. Still, the relatively moderate effects that those tsunamis had, together with the moderate seismic potential for the country, explains the popular belief that tsunamis are not a threat for Costa Rica. During the past 30 years, coastal development and tourism have largely increased at both Pacific and Caribbean coasts, thus increasing the tsunami vulnerability. Here we present the tsunami science that has been done in Costa Rica in the past decade, its impact and how are we planning to address its shortages. Tsunami hazard assessments were performed in both shores using seismic sources with homogeneous slip and considering both local and distant sources. The results for the Pacific showed that distant tsunamis might cause larger inundation than local tsunamis; but arrival times for local tsunamis might be as short as 2 minutes. For the Caribbean, depending on location, local sources might cause larger inundation than regional sources, again with arrival times as small as 5 minutes. Thus, the tsunami threat for Costa Rica is not negligible, neither from local nor distant sources at both shores. A tsunami with the characteristics of past tsunamis might have a much larger impact nowadays. Based on the results of those studies, Costa Rica has started implementing tsunami preparedness measures, aligned with the four pillars of the Ocean Decade Tsunami Program (ODTP): Risk Knowledge; Detection, Analysis and Forecasting of Tsunamis and Associated Hazardous Consequences; Warning Dissemination and Communication; and Preparedness and Response Capabilities. As a result, tsunami awareness has increased nationwide, about one in five coastal communities have at least a tsunami evacuation map, and 11 communities have been recognized as IOC/UNESCO Tsunami Ready. Still, much work is needed, both in preparedness and in scientific research. New tsunami hazard assessments should consider seismic sources with heterogeneous slip and probabilistic approaches, together with non-seismic sources, to refine the characterization of the threat for both shores and ensure preparedness is based on the best science available.

How to cite: Chacon-Barrantes, S., Rivera-Cerdas, F., Espinoza-Hernández, K., and Sandoval-Alvarado, P.: Tsunami science impacting Costa Rica: past, present and future, One Ocean Science Congress 2025, Nice, France, 3–6 Jun 2025, OOS2025-257, https://doi.org/10.5194/oos2025-257, 2025.

Madagascar's mangroves cover approximately 236,400 hectares, representing 20% of Africa's mangroves and 2% of the global total. 98% of these mangroves are located along the island's west coast. The governance of this ecosystem involves a variety of stakeholders, including (i) state actors such as ministries with their deconcentrated services and decentralized territorial authorities at the regional and municipal levels; (ii) traditional authorities like the Sojabe; (iii) civil society; (iv) NGOs; (v) private sector, including companies involved in the collection and export of fishery products, as well as vendors of mangrove wood and charcoal; and (vi) local community organizations. While this diversity enhances ecosystem management, it also complicates efforts to ensure the mangroves' sustainability. This situation raises the question : is there coordination and collaboration among these stakeholders in mangrove management ? To answer this, data were collected through socio-economic methods, including informal and formal interviews and surveys, with analysis performed using Excel and SocNetV software. The Boeny Region, in the northwest part of Madagascar, was chosen to conduct the study. Key institutions in mangrove governance include the Ministry of Environment and Sustainable Development, responsible for conserving natural resources and forests, and the Ministry of Fisheries and the Blue Economy, which oversees the sustainable management of fishery resources and their habitats. The Regional authorities, as decentralized territorial entities, coordinates and harmonizes economic and social development within its jurisdiction, including those related to natural resource management. Communication between stakeholders about the mangroves occurs on an ad hoc basis in 68% of cases, depending on the context and availability of financial, human, and material resources. Reports on activities and violations are exchanged monthly or quarterly among state actors. NGOs, however, provide reports on an ad hoc basis and upon request from deconcentrated services or local authorities, though they regularly submit reports to donors and superiors according to required frequencies. Regarding collaboration, 75% of interactions occur without formal agreements, based on immediate needs. In conclusion, while coordination and collaboration in mangrove management exist, they remain unclear and lack a structured framework to optimize the involvement of all stakeholders. Thus, sharing this study at the One Ocean Science Congress is important as it aligns with Theme 10: "Vibrant Science to Inform and Support Ocean Action," specifically the open session T10-13, which focuses on coastal resilience. Indeed, the study presents a concrete case related to the theme: "From Science to Shoreline: Bridging Knowledge, Policy, and Action for Coastal Resilience."

How to cite: Andriamanohisoa Raveloson, M.: "Stakeholder Involvement and Coordination in the Management of Mangroves in Madagascar", One Ocean Science Congress 2025, Nice, France, 3–6 Jun 2025, OOS2025-424, https://doi.org/10.5194/oos2025-424, 2025.

(For Inclusion in IOC Session 1)

SmartCoast is a pioneering collaborative initiative lead by Fugro, in partnership with James Cook University (JCU) and EOMAP. Addressing the need for better coastal zone management tools, the project focuses on improving access and use of Geo-data in the Torres Strait. This region is increasingly vulnerable to climate change, experiencing more frequent extreme weather events and amongst the highest rates of sea level rise for any island community in the Pacific. Mangroves, which naturally line the shorelines of these islands, provide a crucial nature-based solution to mitigate coastal erosion. However, there is a significant lack of baseline data on the extent and health of these mangroves, with monitoring to determine the need for intervention and rehabilitation difficult due to their remote or difficult to access locations.

To address these challenges, SmartCoast employs a fusion of earth observation, lidar, and high-resolution imagery to create an uninterrupted, high-resolution, sea-to-land survey path with a specific focus on mangrove vegetation. This comprehensive data collection is essential for developing the robust SmartCoast application, which will serve as a foundational tool for ecosystem and mangrove management.

SmartCoast is designed as a tailored platform to deliver precise and actionable Geo-data insights for coastal management. By creating a virtual representation of the islands, the platform enables users to make informed decisions by visualizing complex natural processes. It features environmental hindcasting and forecasting for various climate scenarios and storm events. The digital twin will undergo iterative prototyping with various UI/UX designs to ensure user-friendliness and adherence to FAIR (Findable, Accessible, Interoperable, and Replicable) data principles.  Co-design with the local community is key to this.

The verification of mangrove ecosystem data is led by James Cook University (JCU) in collaboration with local island habitat rangers. This collaboration will support the development of advanced capabilities, including inventory classification (e.g., healthy, threatened, transition zones, catchment areas) to enhance mangrove management and assess asset exposure risk to coastal inundation.

Beyond mangrove management, SmartCoast has a wide range of potential applications. By providing detailed maps and advanced Geo-data, SmartCoast supports biodiversity conservation efforts, helps prepare for and respond to natural disasters and sea level rise, monitors water quality, manage fisheries sustainably, facilitates the planning of sustainable tourism, informs coastal infrastructure development, and contributes to climate change research.

SmartCoast represents a significant advancement in digital coastal zone management, providing a scalable and replicable model that can be adapted to other regions facing similar challenges. It exemplifies the integration of advanced technological solutions with practical, on-the-ground expertise to address the pressing challenges posed by climate change and human activities on coastal and ocean ecosystems. This initiative not only aims to protect and restore vital coastal habitats but also to provide a blueprint for similar efforts worldwide, ensuring the long-term health and resilience of our planet’s coastal regions.

How to cite: Cajelot, B., Millar, D., Seaton, P., and Kilcoyne, E.: SmartCoast - An Innovative Digital Coastal Zone Management Tool for the Torres Strait, One Ocean Science Congress 2025, Nice, France, 3–6 Jun 2025, OOS2025-849, https://doi.org/10.5194/oos2025-849, 2025.