The objective of ARCOS is to design and implement an early-warning system providing continuous monitoring of the Arctic Region. Designed to generate actionable products in the security domain by processing and fusing multi-sensor data, the system integrates available information from space, non-space sources and products available from multiple Copernicus services. ARCOS generates information at three different levels of scale and user interaction: 1. Level 1: Automatic Early-warning System. Integration of space and non-space data sources for the triggering of alarms on the region when certain conditions happens. Automatic early-warnings are generated in case anomalous behaviours are detected. For this wide-area monitoring, automatic extraction of analytics and AI techniques are applied. 2. Level 2: User-Driven Alert System, where space and non-space data is processed on specific locations provided by the user. The alarms can be configured based contextual information based on the user input. 3. Level 3: Geospatial Intelligence Products. Following early-warnings generated in Level 1 or 2, geospatial intelligence products requiring human intervention are provided upon user request. The system is developed using GeoNode (https://geonode.org/) as a Core component and integrates OpenEO services (https://openeo.org/) for the generation of innovative contents from open datasets like Copernicus Sentinels data, Copernicus Services data, AIS data and Social media.