Some unique strengths of the IF OHP-GEO candidate in the national landscape:

• The Haute Provence Observatory is in the PACA region, particularly exposed to climate change.
• It is a clear sky site favorable to satellite validation.
• The OHP is a “rural” site sometimes disturbed by the advection of anthropogenic or natural plumes, which allows to develop studies on the background atmosphere and on advecté plumes
• The OHP site has a large hospitality capacity and a team of technical experts to support the scientific community and teaching activities.
• The OHP is participating in the implementation phase of the IR ACTRIS-Fr and wants to be involved in this infrastructure for the long term at national and European level. The OHP has already housed the SNO PHOTONS and AERONET photometer calibration centre since January 2019.
• The OHP-GEO now hosts 3 SNOs (NDACC, ICOS, PHOTONS); These elementary bricks allow the development of transverse scientific axes to the SNOs described in the Research tab. The OHP-GEO also benefits from additional long-term measurements carried out on two other unlabelled INSU platforms: an AtmoSud station (Air Quality Monitoring Agency in the PACA region) and the O3HP (Pubescent White Oak Observatory) INEE).