SAOZ/NDACC Network Report 1 August 2015 – 31 July 2016 Thule Ny-Alesund Zhigansk Sodankyla ScoresbySund Salekhard Harestua Aberystwyth Jungfraujoch OHP Tarawa Bauru Reunion Rio Gallegos Kerguelen Rothera Dumont d’Urville Concordia NDACC SC, Bremen, Germany, Oct. 2016

Stations list Station Country Location St / End date Property Co-Is Ny-Alesund Spitsbergen 79 N, 12 E Sep. 90 NILU K. Stebel, T. Svendby Thule Greenland 77 N, 69 W DMI P. Ericksen, N. Jepsen ScoresbySund 70N, 22 W Nov. 91 CNRS / DMI A. Pazmino, P. Ericksen, F. Goutail, J.P. Pommereau Zhigansk East Siberia 67 N, 123 E Dec. 91 / Aug. 13 CNRS / CAO A. Pazmino, F. Goutail, J.P. Pommereau Sodankyla Finland 67 N, 27 E Mar. 90 CNRS / FMI A. Pazmino, R. Kivi, F. Goutail, J.P. Pommereau Salekhard West Siberia 67 N, 67 E Nov. 98 / Dec. 14 Harestua Norway 60 N, 10 E Jan. 94 BIRA M. Van Roozendael Aberystwyth Wales 52 N, 4 W Jul. 91 U. Manchester G. Vaughan, A. Smedley Jungfraujoch Switzerland 47 N, 8 E Jun. 90 OHP France 44 N, 6 E Jun. 92 CNRS A. Pazmino, F. Goutail, J.P. Pommereau Tarawa Kiribati Is. 1 N, 173 E Jul. 92 / Jul.. 99 CNRS / NIWA A. Pazmino, P. Johnston, F. Goutail, J.P. Pommereau Reunion Reunion Is. 21 S, 55 E Feb. 94 CNRS / U. Reunion A. Pazmino, T. Portafaix, F. Goutail, J.P. Pommereau Bauru Brazil 22 S, 49 W Nov. 95 CNRS / UNESP Kerguelen Kerguelen Is. 49 S, 70 E Dec. 95 Rio Gallegos Argentina 52 S, 69 W Mar. 08 CNRS / CITEFA A. Pazmino, E. Quel, F. Goutail, J.P. Pommereau Faraday Antarctica 65 S, 64 W Jan. 90 / Oct. 95 BAS H. Roscoe Rothera 68 S, 68 W Jan. 96 H. Roscoe, S. Colwell Dumont d’Urville 67 S, 140 E Jan. 88 Concordia 75 S, 123 E Jan. 07 NDACC SC, Bremen, Germany, Oct. 2016

Stations operations Station Configuration Reporting Period August 2015 – July 2016 Nb of Days Ny-Alesund PC; V1024 Spring and Fall only 134 Thule 160 ScoresbySund Spring to Fall. Missing days due to shutter failures 234 Zhigansk Stopped in Aug. 31, 2013. Replaced by ROSHYDROMET Mini-SAOZ (Gruzdev et al., 2016) -- Sodankyla Nominal operation 363 Salekhard Stopped on 31 Dec., 2014. Replaced by ROSHYDROMET Mini-SAOZ (Gruzdev et al., 2016) 167 Harestua SAOZ-like Instrument renewed in Nov. 2012 341 Aberystwyth Instrument malfunction and repair. Lack of data until 25 Sept. 2015 283 Jungfraujoch Instrument renewed in Sept. 2012 279 OHP 366 OHP (Mini-SAOZ) PC, V2048 NDACC candidate 328 Tarawa Old HP; V512 Stopped since 1999 Reunion Reunion (Mini-SAOZ) Installed in Dec 2015. NDACC candidate 223 Bauru 354 Kerguelen 361 Rio Gallegos 343 Faraday/Rothera PC; V1024.512 Dumont d’Urville 384 Concordia Spring to Fall 257 NDACC SC, Bremen, Germany, Oct. 2016 3

NDACC SC, Bremen, Germany, Oct. 2016 Data availability Consolidated data in NDACC data-base 11 CNRS and BIRA V3 version: spectral data reprocessed following UV-Vis WG recommendations. - O3 : daily AMF using O3 profiles climatology (Hendrick et al., 2011) - NO2 : separate sunrise/sunset AMF using NO2 profiles climatology (Van Roozendael & Hendrick, 2012) Faraday/Rothera V3’ version: - O3 : daily AMF using blend O3 profiles climatology (Roscoe et al., 2001) - NO2 : monthly chemically-modified AMFs using climatology from Cambridge 2D model (Cook & Roscoe 2009) NyAlesund and Salekhard V2 version: - O3 : daily AMF using O3 profiles climatology - NO2 annual mean AMFs Aberystwyth and Thule V1 version: - O3 and NO2 annual mean AMFs NDACC SC, Bremen, Germany, Oct. 2016

NDACC SC, Bremen, Germany, Oct. 2016 Data availability Consolidated data in other data-bases CNRS stations SAOZ web page: http://saoz.obs.uvsq.fr/ ESPRI (Atmospheric French database): http://cds-espri.ipsl.fr/NDACC/ WOUDC (V2 version until December 2015) Aberystwyth WOUDC (V1 version in 2016) NDACC SC, Bremen, Germany, Oct. 2016

NDACC SC, Bremen, Germany, Oct. 2016 Data availability NEAR REAL TIME DATA All CNRS stations in V3 SAOZ web page http://saoz.obs.uvsq.fr/SAOZ-RT.html (daily) WOUDC maps (daily) ESA CAL/VAL (monthly) EU GEOMON (daily) ESPRI (Atmospheric French database): (daily) NDACC webpage (OHP and Reunion_StDenis) Jungfraujoch in V3 NDACC webpage Ny-Alesund in V3 SAOZ web page (daily) Rothera in V2’ (O3: monthly AMFs 1995's climatology, NO2: annual-mean AMFs from SAOZ files of 1990) BAS/MOMU data-base (daily) http://www.antarctica.ac.uk/met/jds/ozone/index.html NDACC SC, Bremen, Germany, Oct. 2016 6

NDACC SC, Bremen, Germany, Oct. 2016 Data archival Station 88 89 90 91 92 93 94 95 96 97 98 99 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 Ny-Alesund Thule ScoresbySund Zhigansk Sodankyla Salekhard Harestua Aberystwyth Jungfraujoch OHP Tarawa Reunion Bauru Kerguelen Rio Gallegos Faraday/Rothera Dumont d’Urville Concordia Consolidated NDACC database V1 V2 V3 V3’ Real-Time database RT V1 RT V2’ RT V3 NDACC SC, Bremen, Germany, Oct. 2016

NDACC SC, Bremen, Germany, Oct. 2016 Funding Station Present Future Ny-Alesund NILU funding Secured in 2017 Thule Expiring end 2016. Uncertain in 2017 ScoresbySund French funding secured (SO OVSQ). Operations: DMI until end 2016 Zhigansk Stopped on August 31, 2013 Sodankyla French funding secured (SO OVSQ). Operations: FMI, Finland Salekhard Stopped on December 31, 2015 Harestua Funding secured in 2016 Aberystwyth No direct funding, but data processing has been recently been automated and submission is carried out alongside associated datasets Jungfraujoch OHP French funding secured (SO OVSQ) Tarawa Stopped in 1999 Reunion French funding secured (SO OVSQ). Operations: OPAR, Reunion Is Bauru French funding secured (SO OVSQ). Operations: IPMet/UNESP, Brazil Kerguelen French funding secured (SO OVSQ, IPEV). Rio Gallegos French funding secured (SO OVSQ). Operations: CEILAP/CITEDEF, Argentine Faraday/Rothera BAS internal funding Dumont d’Urville Concordia NDACC SC, Bremen, Germany, Oct. 2016

NDACC SC, Bremen, Germany, Oct. 2016 Conclusions Continuation of long-term Satellite/SAOZ comparisons a) O3: TOMS, GOME, SCIAMACHY, OMI ozone column temperature and SZA dependences ESA CCI-ozone ECV project (Koukouli et al., 2015) Comparison with SBUV in collab. with NASA/GSFC, in progress b) NO2: SCIAMACHY, GOME, OMI GOME-2 Arctic Ozone loss in 2016 and comparisons to others winters (EGU, QOS, 2016) SAOZ / DOBSON / BREWER Total Ozone Intercomparison at Arosa, since Oct. 2015 CINDI-2 (Cabauw Intercomparison campaign of Nitrogen Dioxide measuring Instruments 2), in Sept. 2016, KNMI Cabauw/CESAR site, The Netherlands Future: Participation to Sentinel 5 Precursor Cal/Val for stratospheric O3 & NO2 columns Deployment of Mini-SAOZ in Seychelles Islands NDACC SC, Bremen, Germany, Oct. 2016

Mini-SAOZ, Dobson & Brewer comparaison in Arosa, Switzerland since Oct 2015 Collaboration with MeteoSwiss & WMO Similar day to day & seasonal variability - 0.7 ± 2.7 % mean bias between SAOZ & Dobson 62 and -3.4%±2.9% with Brewer 40 2.1% amplitude difference seasonality between SAOZ and Dobson 62 and Dobson 51 due to O3 cross-sections temperature dependence Absence of seasonality with Brewer NDACC SC, Bremen, Germany, Oct. 2016

NDACC SC, Bremen, Germany, Oct. 2016 Publications (1/3) PEER REVIEWED PAPERS Boynard, A., D. Hurtmans, M. Koukouli, F. Goutail, J. Bureau, S. Safieddine, C. Lerot, J. Hadji-Lazaro, J.P Pommereau, A. Pazmino, Irene Zyrichidou, D. Balis, A. Barbe, S. N. Mikhailenko, D. Loyola, P. Valks, M. Van Roozendael, P.F. Coheur, and C. Clerbaux: Seven years of IASI ozone retrievals from FORLI: validation with independent total column and vertical profile measurements. Atmos. Meas. Tech., 2016, 9, 4327–4353, doi:10.5194/amt-9-4327-2016. Koukouli, M. E., C. Lerot , J. Granville , F. Goutail , J. C. Lambert , J-P. Pommereau , D. Balis , E. Zyrichidou , M. van Roozendael , M. Coldewey-Egbers , D. Loyola , G. Labow , S. Firth , R. Spurr , and C. Zehner, Evaluating a new homogeneous total ozone climate data record from GOME/ERS-2, SCIAMACHY/Envisat, and GOME-2/MetOp-A, J. Geophys. Res. Atmos., 2015, 120, 12,296–12,312, doi 10.1002/2015JD023699 Poulain, V., S. Bekki, M. Machand, M. Chipperfield, M. Khodri, F. Lefèvre, S. Dhomse, G. Bodeker, R. Toumi, M. De Mazière, J-P Pommereau, A. Pazmino, F. Goutail, D. Plummer, E. Rozanov, E. Mancini; H. Akiyoshi; J-F Lamarque and J. Austin: Evaluation of the inter-annual variability of stratospheric chemical composition in chemistry-climate models using ground- based multi species time series. Journal of Atmospheric and Solar-Terrestrial Physics, Elsevier, 2016, 145, pp.61-84, doi: 10.1016/j.jastp.2016.03.010. Verhoelst T., Granville J., Hendrick F., Köhler U., Lerot C., Pommereau J.-P., Redondas A., Van Roozendael M., Lambert J.- C., Metrology of ground-based satellite validation: co-location mismatch and smoothing issues of total ozone comparisons, Atmos. Meas. Tech., 2015, 8, 5039-5062, doi:10.5194/amt-8-5039-2015. NDACC SC, Bremen, Germany, Oct. 2016 11

NDACC SC, Bremen, Germany, Oct. 2016 Publications (2/3) REPORTS AND CONFERENCES (1/2) Frihi, A., J.P. Pommereau, F. Goutail, A. Pazmino, S. Bekki, Origin of Satellites and G-B SAOZ total ozone measurements differences in the tropics, Satellites and SAOZ total ozone comparison in the tropics. EGU General Assembly 2016, Vienna, Austria, 17-22 April 2016. Godin-Beekmann, S., A. Pazmino, F. Goutail, S. Khaykin, M.R. de Backer, F. Jégou and I. Petropavlovskikh, Recent ozone trends at northern mid-latitudes. SHARP workshop, Berlin, Germany, 16-19 February 2016. Goutail, F., J.-P. Pommereau, F. Lefevre, A. Pazmino, M. Chipperfield, W. Feng, M. Van Roozendael, P. Eriksen, K. Stebel, R. Kivi, K. Strong, X. Zhao, K. Walker, V. Sitnikova and S. Khatatov, Twenty-two years Arctic ozone depletion observations and simulations. Is there a trend? Quad. Ozone Symp., 4-9 September, 2016. Goutail F., F. Lefevre, J-P Pommereau, A Pazmino, M. Chipperfield, W. Feng, M. Van Roozendael, P. Eriksen, K. Stebel, R. Kivi, K. Strong, X. Zhao, and K. Walker, Total ozone loss during the 2015/16 Arctic winter and comparison to previous years. EGU General Assembly 2016, Vienna, Austria, 17-22 April 2016.  Lamy K., T. Portafaix, H. Bencherif, S. Godin-Beekmann, C. Brogniez, J.M. Metzger, A. Pazmino, and C. N. Long, Ultraviolet Radiation modeling from ground based and satellite measurements of Ozone over Réunion Island, Quad. Ozone Symp., 4-9 September, 2016. Pazmino, A., S. Godin-Beekmann, A. Hauchecorne, C. Claud, F. Lefèvre, S. Khaykin, F. Goutail, J. P. Pommereau, C. Boonne, E. Wolfram, J. Salvador, E. Quel, Evaluation of total ozone recovery inside the Antarctic vortex, Quad. Ozone Symp., 4-9 September, 2016. Pinardi G., Van Roozendael, M., Lambert, J.-C., Granville, J., Hendrick, F., Gielen, C., Cede, A., Kanaya, Y., Irie, H., Wittrock, F., Richter, A., Peters, E., Wagner, T., Gu, M., Remmers, J., Lampel, J., Friess, U., Vlemmix, T., Piters, A., Hao, N., Tiefengraber, M., Herman, J., Abuhassan, N., Holla, R., Bais, A., Balis, D., Drosoglou, T., Kouremeti, N., Hovila, J., Chong, J., Postylyakov, O., Ma, J., Goutail, F., Pommereau, J.-P., Pazmino, A., Navarro, M., Puentedura, O., Yu, H., ESA Living Planet Symposium, Prague, Czech Republic, 9-13 May 2016. Pommereau J.P., A. Frihi, F. Goutail , A. Pazmino, S. Bekki, C. Clerbaux, A. Boynard, P.-F. Coheur, C. Lerot, M. Van Roozendael, T. Danckaert, T. Portafaix, Origin of Satellites and G-B SAOZ/NDACC total ozone measurement differences in the tropics, Quad. Ozone Symp., 4-9 September, 2016 NDACC SC, Bremen, Germany, Oct. 2016 12

NDACC SC, Bremen, Germany, Oct. 2016 Publications (3/3) REPORTS AND CONFERENCES (2/2) Pommereau, J.P., C. Lerot, M. Van Roozendael, F. Goutail, A. Pazmino, A. Frihi, S. Bekki and C. Clerbaux, All satellites total ozone evaluation in the tropics by comparison with SAOZ-NDACC ground-based measurements, 41st COSPAR Scientific Assembly, 30 July – 7 August, 2016. Pommereau, J.P., F. Goutail, A. Pazmino, C. Clerbaux, J. Hadji-Lazaro, A. Boynard and C. Clerbaux, Evaluation of IASI total ozone accuracy by comparisons with SAOZ and all other satellites measurements in the tropics and at mid-latitudes, IASI 2016, Antibes Juan-les-Pins, France, 11-15 April 2016. Portafaix T., A. M. Toihir, H. Bencherif, S. Godin-Beekmann, V. Sivakumar, N. Bègue, and A. Pazmino, Influence of the dynamical activity on the inter-annual variability of ozone in the tropics, Quad. Ozone Symp., 4-9 September, 2016. Salvador J., E. Wolfram, J. Quiroga, F. Orte, F. Zamorano, S. Godin-Beekmann, A. Pazmiño, E. Quel, H Ohyama, T Nagahama, T Nakajima, and A Mizuno, Stratospheric ozone observations at mid-latitude NDACC station Río Gallegos (51º 36’S, 69º 19’W ), Patagonia, Quad. Ozone Symp., 4-9 September, 2016 NDACC SC, Bremen, Germany, Oct. 2016 13