• Main site, Palaiseau: 48.717°N 2.207°E 160 m a.s.l.
• LSCE site, CEA: 48.710°N 2.149°E 160 m a.s.l.

Observational platform

France

• Atomic Energy and Alternative Energies Commission (CEA)
• École Polytechnique
• French National Centre for Scientific Research (CNRS)
• French National Institute for Industrial Environment and Risks (INERIS)
• Versailles Saint-Quentin-en-Yvelines University (UVSQ)

https://sirta.ipsl.fr/

• Martial Haeffelin
  Facility PI
• Jean-Charles Dupont
  PI deputy
• Valérie Gros
  PI deputy

Observational platform, peri-urban site in Paris, suburban background.

SIRTA is a French national atmospheric research observatory dedicated to research on cloud, aerosol, trace-gas physical and chemical processes (ACTRIS) and high precision analysis of ICOS/InGOS variables. The SIRTA observatory is supported by CNRS, Ecole polytechnique and CEA in collaboration with five other research performing organisations. It is operated by permanent staff of 15 scientists and engineers.
SIRTA is located on the Saclay plateau, in a semi-urban environment, 25 km south of the Paris city centre (48.7N, 2.2E), influenced by local and/or regional air masses (depending on the meteorological conditions).

The scientific perimeter of activities carried out at SIRTA includes reactive and greenhouse gases, aerosols, clouds, and precipitation, radiative exchanges, heat fluxes, atmospheric dynamics and thermodynamics. The scientific applications also concern the use of these fields of expertise to study their impact on human activities such as health, transport and energy.
IPSL developed since 1999, with its partners, an atmospheric research observatory, the SIRTA, to gather its atmospheric observation means, to implement reference observation procedures, to develop multi-decadal data sets for the research needs of the national and international scientific community and for teaching purposes in the Paris region
The SIRTA observatory proposes a 20-year long multi-parameter dataset for regional climate variability studies and analyses of physico-chemical processes in the atmosphere. The facility can host field campaigns and instrument tests in the domain of atmospheric research.

• Haeffelin et al. (2005). SIRTA, a ground-based atmospheric observatory for cloud and aerosol research. Ann. Geophys., 23(2), 253-275. https://doi.org/10.5194/angeo-23-253-2005
• Chiriaco et al. (2018). ReOBS: a new approach to synthesize long-term multi-variable dataset and application to the SIRTA supersite. Earth Syst. Sci. Data, 10(2), 919-940. https://doi.org/10.5194/essd-10-919-2018
• Ribaud et al. (2021). PARAFOG v2.0: a near-real-time decision tool to support nowcasting fog formation events at local scales. Atmos. Meas. Tech., 14(12), 7893-7907. https://doi.org/10.5194/amt-14-7893-2021
• Petit et al. (2021). Response of atmospheric composition to COVID-19 lockdown measures during spring in the Paris region (France). Atmos. Chem. Phys., 21(22), 17167-17183. https://doi.org/10.5194/acp-21-17167-2021