The South African Environmental Observation Network (SAEON): A long-term research facility supporting environmental science in the terrestrial, coastal, marine and polar domains for a sustainable society.

The South African Environmental Observation Network is a South African national research facility dedicated to developing long-term environmental research infrastructure platforms to support environmental science for a sustainable society. Operating across terrestrial, coastal and marine domains, SAEON integrates in situ observations, models, long-term experiments and data systems to monitor biophysical and ecological processes at a diverse array of sites, representing the range of ecosystem and social contexts in South Africa at multiple spatial and temporal scales. This coordinated, multidimensional observation and data management capability supports critical insights into climate variability, biodiversity dynamics, land-use impacts, and land-atmosphere-ocean interactions. SAEON provides open-access, high-quality datasets that are interoperable with international partners, and that underpin scientific analysis and assessments that are relevant for policy. SAEON plays a strategic role within both national and international research communities. Its infrastructure contributes to continental and global observation systems by providing platforms in data-scarce regions, strengthening predictive modelling capacity through datasets for model parameterisation and verification, and supporting environmental risk assessment and sustainability planning. As a research infrastructure platform, SAEON supports collaboration among universities, government agencies, research councils, and international partners, enabling comparative studies and harmonised data. Its data stewardship and open-access platforms enhance transparency, reproducibility, and equitable knowledge sharing. In addition to the direct support for research, SAEON actively develops research capacity in South Africa by supporting students, training emerging scientists, supporting science education and data literacy. SAEON actively participates in numerous environmental research infrastructure networks through active collaboration and continuous alignment. This presentation will highlight how SAEON’s long-term observations, accessible data, collaborative networks, and capacity-building activities in a data and capacity-limited region are a critical contributor to global environmental research efforts supporting informed decision-making for a sustainable society.