FAIR and Open Science practices in Europe continue to grow strongly. Developments started with the 'FAIR Guiding Principles for scientific data management and stewardship' published in 2016 and the European Open Science Agenda in 2018. This positive trend is reflected both in the growing number of platforms and services for Open Science and in the increasing acceptance and participation of relevant stakeholders. This gives rise to the challenge of sustainable usability and interoperability to enable synergies and new levels of opportunities. How can data and services from a wide variety of platforms, operated by diverse stakeholders with different interests, world views, and business models, be integrated in a meaningful way?

To explore possible solutions, the Open Geospatial Consortium (OGC) has issued a request for information for the Open Science Persistent Demonstrator (OSPD). The information request is in preparation for OGC's OSPD initiative that brings a variety of platform providers, users, and researchers together to develop solutions for seamless interaction across different platforms. The goal is to develop efficient building blocks for Open Science platforms and their use, which on the one hand promote integration, and on the other hand give the platforms the necessary freedom to meet the demands of their core community enabling cooperation.

This session focuses on common standards such as OGC at technical and semantic levels that integrate domain-specific and multidisciplinary applications to access multi-scale and multi-thematic data, services and platforms. We encourage case studies demonstrating or proposing how such standards are (re)used in scientific workflows (e.g. virtual research environments) to enable seamless interactions between Earth science platforms. The opportunities and challenges can be related, but not limited to the following initiatives promoting Open Science:
● EOSC (European Open Science Cloud) to federate multidisciplinary research infrastructures that will be connected with sectoral data spaces (e.g. Green Deal).
● ESFRI (European Strategy Forum on Research Infrastructures) to harmonise different Research Infrastructures.
● GEOSS (Global Earth Observation System of Systems) to connect a large array of observation systems, data systems and processing services.
● Copernicus Atmosphere, Marine and Land Services to provide the provision based on the processing of environmental data.