Jointly operated research infrastructure is an important part of collaborative research. Research infrastructure in support of atmospheric and climate research consists of multi-component sensing equipment intended to be deployed in distributed or mobile networks, or in observatory settings to observe a large number of variables and processes simultaneously (ATMOsense). Experimental laboratory facilities (ATMOlabs) provide process understanding and provide open access for the scientific community. Highly specialized modeling tools (ATMOmod) are developed in house and complement the observational and laboratory infrastructure. Whole Atmosphere Approach” relies on the integration of observational systems, experiments, predictive models and data analysis, utilised as a closely interconnected network of infrastructures that provides the foundation for answering our research questions.