ATMO-ACCESS is the organised response of distributed atmospheric research facilities to develop a pilot model of integrating activities. The project strives to develop a series of recommendations to establish a comprehensive and sustainable framework for access to distributed atmospheric Research Infrastructures (RI), ensuring integrated access to and optimised use of the services they provide. ATMO-ACCESS mobilises extensive resources in the atmospheric RIs communities to engage into harmonising access procedures in relation to policies, financial regulations and conditions for access.ATMO-ACCESS aims to develop and test innovative modalities of access to facilities and complementary and more advanced services, including digital services, developed as part of cross-RI efforts, largely through a series of open trans-national access (TNA) calls and training events.