Martial Haeffelin (on behalf of J-F. Doussin) CNRS / IPSL CNRS Report Atmospheric Composition Observing Systems, and Opportunities at the French and European Level Martial Haeffelin (on behalf of J-F. Doussin) CNRS / IPSL

OUTLINE NDACC : a highly important network for CNRS Research Infrastructures: a tool/opportunity to support long- term atmospheric observations (ACTRIS-FR) AERIS: the French integrated atmospheric data & services center (NDACC data and services) NDACC services in ACTRIS-RI

1. High-level of CNRS Engagement in support of NDACC Network SAOZ Network OHP Présentation de la carte du NDACC avec la localisation des stations françaises à l’OHP, l’OPAR et DDU plus les sites du réseau de spectromètres UV-visible SAOZ OPAR DDU

Gérard Mégie Geophysical Station Haute-Provence Observatory (44°N, 5,7°E, 650m) Instruments for atmospheric monitoring NDACC instruments running since 1991: - 4 lidars: O3, temperature, aerosols, water vapor, - O3, NO2, BrO, UV spectrometers - Ozonosondes + meteorological sondes Other Networks - O3, CO in situ - Aeronet sunphotometer (Aerosols) Research instruments - Doppler Wind lidar - Michelson EPIS (wind 80 km) - Pyranometers - Infrasound sensors BrO: hypobromite used as a germicide and antiparasitic in both industrial applications, and in the immune system Station site http://sosgm.obs.uvsq.fr

Evidence of long-term support 22-year series of stratospheric aerosol observations using two independent lidars at OHP Stratospheric Aerosol Optical Depth 17-30 km (sAOD1730) @ 532 nm Intercomparison of sAOD from OHP lidars and satellites Partie haute: intercomparison de l’épaisseur optique des aérosols stratosphériques entre 17 et 30 km obtenue avec les 2 lidars température (LTA) et ozone (voie non absorbée), comparée aux instruments spatiaux GOMOS (occultation stellaire), Sage II (occultation solaire), OSIRIS (diffusion solaire au limbe ) et CALIOP (lidar) Partie basse : évolution de l’épaisseur optique vue par les lidars et les satellites avec indication des périodes affectées par des éruptions volcaniques. Excellent agreement allowing for accurate characterization of stratospheric aerosol variability and long-term change Khaykin et al., ACPD, 2016

Comparisons to previous winters (EGU & QOS, 2016) O3 loss estimation with SAOZ Comparisons to previous winters (EGU & QOS, 2016) O3 loss (%) Estimation de la destruction d’ozone (colonne stratosphérique) chaque hiver déterminée à partir des spectromètres SAOZ. Les mesures sont comparées au modèle LMDZ-Reprobus avec chimie désactivée pour estimer la destruction. Large ozone loss interannual variability, dependent on vortex duration 2016: third largest loss since 1994 2011: record 38% 1996: 30%

Mesures du lidar vapeur d’eau du Maïdo montrant que le lidar peut atteindre la basse stratosphère à condition d’intégrer suffisamment longtemps.

2. RESEARCH INFRASTRUCTURES A TOOL/OPPORTUNITY TO SUPPORT LONG-TERM ATMOSPHERIC OBSERVATIONS (ACTRIS-RI EU; ACTRIS-FR)

2. RESEARCH INFRASTRUCTURES IN SUPPORT OF LONG-TERM OBS ACTRIS Research Infrastructure: Services developed to support observing networks (EARLINET, CLOUDNET, NDACC, …) Short-lived species Atmospheric composition Troposphere-lower Stratosphere Processes influencing composition / climate (aerosols, clouds) WP2 ACTRIS National Facilities Technical description/concept for NF service provision Definition of NF requirements (incl. instrument protocols, data requirements,..) Site and network design Site selection for data and physical access (ACTRIS labelling process) Testing of NF services   WP3 ACTRIS Central Facilities Technical description (concept) of Central Facilities CF site selection process (assessment of the CF applications and approval) Testing of CF services

2. RESEARCH INFRASTRUCTURES IN SUPPORT OF LONG-TERM OBS ? NDACC-Fr CLAP GAW PHOTON CC RCCAP ACTRIS HO INDAF CC Cloud Radar NDACC ACTRIS Data Center AERIS SIRTA CC Reactive Gases PDD ACTRIS National Facilities GRUAN OPAR P2OA CC Aeronet-Europe AERONET OHP ACTRIS Calibrat° Centers CC ACMCC 4-M BSRN CESAM

FRENCH INTEGRATED ATMOSPHERIC DATA & SERVICES CENTER 3. AERIS FRENCH INTEGRATED ATMOSPHERIC DATA & SERVICES CENTER

INTEGRATED ATMOSPHERIC DATA & SERVICES CENTER Dynamics, meteorology, chemistry Climate evolution Processes studies Climatology analyses Modeling Validation Data assimilation 4 data centers (Lille, Paris, Lannion, Toulouse) 3000 To of data 1400 CPUs Over 100 projects Need more integrated facilities All type of Observations : Satellite, ground-based observations, campaigns, balloons, aircrafts Simplifying data and services access http://www.aeris-data.fr/

O3 STRATO LIDAR IN HDF FORMAT (CAMS APPLICATION / NORS PROJECT) NDACC-FRANCE DATA AND SERVICES O3 STRATO LIDAR IN HDF FORMAT NRT DELIVERY TO NDACC (CAMS APPLICATION / NORS PROJECT) www.aeris-data.fr

SATELLITE AND IN-SITU DATA AND SERVICES www.aeris-data.fr

4. NDACC SERVICES IN ACTRIS-RI CNRS supports the position that NDACC-FR identifies/proposes services in support of the NDACC network to be included in ACTRIS-RI services.

4. NDACC Services in ACTRIS-RI (1) ACTRIS DATA CENTER: AERIS participation to ACTRIS DC with NDACC value-added products Datasets: Access to satellite and other auxiliary datasets Value-Added Products: Analysis of ozone depletion and chemical state of the stratosphere (Reprobus Chemistry Transport model) Tools: Analysis and forecast maps of stratospheric potential vorticity (MIMOSA model)

4. NDACC Services in ACTRIS-RI (2) ACTRIS CALIBRATION / EXPERT CENTER: Define NDACC network needs (e.g. For stratospheric Lidars? For MAXDOAS?) Characterization of basic components ? Assessment of the overall system’s performance ? Systematic quality assurance ? … Lidar Calibration Training Laboratory? Lidar Components Testing Laboratory? Mobile Lidar facility for intercomparisons? See http://lical.inoe.ro/

4. NDACC Services in ACTRIS-RI (3) ACTRIS TRANSNATIONAL ACCESS: Each country decides which station will provide user physical access French NDACC station providing TNA under ACTRIS-2: OPAR (Reunion) ACTRIS coordinated framework to support and facilitate hands-on access of researchers to 18 world-class observing platforms in Europe within the transnational access (TNA) programme.

DISCUSSION Ensure long-term sustainability of network Participation to Atmospheric Research Infrastructure Manage and develop datasets, tools, services