Obs4Clim: A Collaborative Innovation Project for an Integrated Atmospheric Observing System in France

Addressing environmental challenges related to climate change and air quality requires high-quality observations and data services. The Obs4Clim project is a joint initiative of the three French components of European Research Infrastructures (RIs) in the atmospheric domain: ACTRIS, IAGOS, and ICOS. OBS4CLIM aims at developing innovative services to meet the evolving needs of research communities and stakeholders. The objectives and outcomes of the Obs4Clim project include the development of advanced data services, expansion of spatial and temporal coverage of atmospheric observations, and establishment of a mature access framework for users.

 

Obs4Clim provides atmospheric RIs with adequate investment to keep serving the users at the highest level of quality over the next 15 years and to engage in developments to further respond to emerging needs, e.g. enhancing the networks in their four dimensions (longer and uninterrupted time-series, synergies with space-based observations, expanding global, denser network in specific areas, smart specializations). The 8-year investment plan has three main objectives: fostering attractiveness of atmospheric facilities, enhancing the capacity of atmospheric RIs to provide state-of-the-art data services, and expanding spatial and temporal coverage.

Significant progress has been made in the investment phase of the project, with a substantial portion of equipment expenditures already realized. Adjustments to technical choices and budget reallocations have been made to accommodate specific operations and facilitate co-financing opportunities. Implementation of acquired instruments has advanced significantly, with innovative developments in new observation variables. For example, the use of fluorescence on Lidars now provides new information on aerosol characteristics. High-performance instruments have been developed to better quantify greenhouse gases. ICOS and ACTRIS observation platforms have been equipped with new observation capabilities to measure variables of interest, such as bioaerosols and ammonia. The IAGOS equipment project has shifted towards a new type of aircraft, the Airbus Beluga, to enhance geographic and temporal coverage of vertical profiles. The onboard instruments are currently undergoing certification.

The Obs4Clim project is developing unique services to remain a hub for innovation in research and technology. It is integrated into a mature framework for access, recognized at both national and international levels, which includes physical and remote access to atmospheric facilities as an integral part of the RI service portfolios. By strengthening the capacity to translate the wealth of climate and atmospheric data into actionable insights, Obs4Clim supports decision-makers in finding ways to achieve a clean-air, climate-resilient, and low-carbon society.