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The 7-th Meeting of Ozone Research Managers for the Vienna Convention

The 7-th Meeting of Ozone Research Managers for the Vienna Convention Systematic Ozone Observations Introduction to the Session 6 No satellite issues as discussed yesterday Karel Vanicek Czech Hydrometeorological Institute WMO – SAG Ozone. 7ORM, Geneva, 2008 K. Vanicek, CHMI.

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The 7-th Meeting of Ozone Research Managers for the Vienna Convention

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  1. The 7-th Meeting of Ozone Research Managers for the Vienna Convention Systematic Ozone Observations Introduction to the Session 6 No satellite issues as discussed yesterday Karel Vanicek Czech Hydrometeorological Institute WMO – SAG Ozone 7ORM, Geneva, 2008 K. Vanicek, CHMI

  2. Current Observation Systems Details in the prevous sessions Ground infrastructure - The backbone networks(GAW & NDACC) - Complementary missions(SHADOS, airborn, big-baloon platforms) - Joint technological facilities(calibration and DQ/QA centres) Satellite missions - Number of platforms(NASA, NOAA, ESA, EUMETSAT, …) - Evaluation teams(TOMS, GOME, SCIAMACVHY, OMI, … ) - Data access(NASA, KNMI, DLR, UB, … ) Integration - Umbrellas (IGACO, GCOS, WMO/CEOS) - Advisory (SAG Ozone, SAG-UV) - Assimilated products (O3 & UV mapping) 7ORM, Geneva, 2008 K. Vanicek, CHMI

  3. What we have & What we need ? Systematic observations => => Systematic deposition to data bases Inventory of the ground observation networks Technologies – the current state and challenges The GAW/IGACO/NDACC Meeting on Measurements of Strat. OzoneWMO, Geneva, 21-23 April, 2008, 26 experts, 23 agencies 7ORM, Geneva, 2008 K. Vanicek, CHMI

  4. ~ 40 UV platforms in 2000-2005 UV spectral observations only 279ozone platforms in 1955-2007 167 platforms active in 2000-2007 All ozone data (total & profiles) Conclusions - Coordinated UV networks in US, CD, EU,JP - HQ spectral UV data in the EUVDB restricted - Erythemal UV in regional networks Conclusions - Geograph.imbalance (NH 80%, SH 20%) - ~40% reductionin the recent decades Ground ozone & UV observation capacity ~ 30 platforms in the EUVDB-FMI 7ORM, Geneva, 2008 K. Vanicek, CHMI

  5. Vertical profiles 62Ozone sonde, 24 Umkehr (Dobson) platforms active in 2000-2005 Total Ozone 78 Dobson,72 Brewer,31 Filterplatforms active in 2000-2005 • Conclusions - No Brewers and Dobsons in Central Asia • Instrumental geographical imbalance • ~ 50% of the platforms need data re-evaluation(FioletovJGR, 2008) Conclusions - A few sonde stations in SH and Central Asia - Tropics covered mainly by SHADOZ (11 sites) - Brewer Umkehrs taken but not processed Ground ozone observation networks 7ORM, Geneva, 2008 K. Vanicek, CHMI

  6. Dobson versus Brewer observations Seasonal D-B differences (~ 0-3%) in NH mid-latitudes – expected also in SH-ML & HL Differences between simultaneous Dobson and Brewer observations at Arosa (J. Staehelin & B. Scarnato) Conclusions - Differences attributed mostly to temperature sensitivity of ozone cross sections - Differences reduced to 1% by TOeff corr.but residual stray-light effects persist - Impacts on validation of satellites and seasonal trends of D/B merged data series Actual ChallengesThe GAW/IGACO/NDACC Meeting on Measurements of Strat. OzoneWMO, Geneva, 21-23 April, 2008, 26 experts, 23 agencies 7ORM, Geneva, 2008 K. Vanicek, CHMI

  7. Dobson & Brewer versus satellites Differences(shifts&seasonality) between ground D&B satellite observations Conclusions - D-B differences affect ground-satellite relations - Influence of different satellite algorithms and O3 cross sections 7ORM, Geneva, 2008 K. Vanicek, CHMI

  8. Ground & satellites in high latitudesthe SAUNA experiment • Simultaneous ozone (Dobson, Brewer, DOAS, sonde) observations in high latitudes • Sodankyla Observatory, FMI-ARC (67°N), SAUNA-1 (2006), SAUNA-2 (2007) • Main goals: • Absolute accuracy of ground instrumentsat high SZAs and TOZ values? • Algorithms and instruments for ~1% accuracy of observations of TOZ? • Nature of particular differences between ground and satellites? Conclusions - Atmospheric and instrumental stray light effects – can be corrected by a model - Calibration and stray light issues to be further investigated in 2008-2012 - Activities coordinated by the RBCC-E Izana and co-funded by ESA and NASA 7ORM, Geneva, 2008 K. Vanicek, CHMI

  9. Ozone sondes - JOSIE & BESOS campaigns → SOPs for ECCs - SOP‘s →better accuracy by a factor of 2 - „QA & QC for Ozone Sonde Measurements in GAW“ publ. in 2008 to be implemented in the network - JOSIE campaigns to continue at the WCCOS Juelich LIDARs - Routine or experimental operation at 15 NDACC sites - Instruments and data analysis methods evaluated - Intercomparisons of instruments and algorithms - Further investigations → cross sections, resolution, methods of ICs Ozone profiles by different ground techniques Umkehrs - New UMK-04 algorithm → freeware available - High observation potential at Brewer stations - Further improvements - elimination of stray light effects 7ORM, Geneva, 2008 K. Vanicek, CHMI

  10. Inlet tubes Instrumentation in Avionic Bay below the cockpit O3/CO/H2O/NOy/DAS Ozone profiles by aircrafts - A European Research Infrastructure (MOZAIC, IAGOS) - > 20 000 flights since 1994 for O3, H2O, CO, NOy - Instruments on 5 commercial aircrafts operated Conclusions - > 20 000 flights since 1994 for O3, H2O, CO, NOy - Integration of Aircraft measurements into IGACO - From projects to sustainable Earth observations (GMES) 7ORM, Geneva, 2008 K. Vanicek, CHMI

  11. The BIRA-IASB MAXDOAS the SAUNA contributor The INTA MAX-DOAS at the Izana Observatory • New instrumentation • UV-VIS Diff. Optical Absorption Spectroscopy (DOAS) • Absorption lines in the UV and Visible part of the solar spectrum • Total columns of more species (O3, NO2, H2O, BrO, …) • About 28 devices (prototypes) operated mostly at the NDACC sites • The SAOZ instruments are routinely operated • New MAX-DOAS (BIRA-IASB and INTA) tested with good results towards B&D 7ORM, Geneva, 2008 K. Vanicek, CHMI

  12. FT-IR NDACC sites New instrumentation Fourier Transform Infrared Spectrometers (FT-IR) - Multiple columns & profiles - About 15 devices at the NDACC sites - Recent results: ~1 % accuracy for column ozone Microwave Radiometers - Ozone profiles from O3 emissions at~102 GHz - Range: ~20-70km, resolution: ~ 5-10km - About a dozen devices at the NDACC sites • Conclusions for UV-VIS & FT-IR & Microwave • - Multiple observations of atm. species →validation of GHG satellites • Perspective instruments for total columns and vertical profiles • Implementation of DQ,calibration and SOPs for a better integration 7ORM, Geneva, 2008 K. Vanicek, CHMI

  13. Spectral irradiances – UV scans Brewer spectrophotometer MK-III Erythemal UV irradiation UV-Biometers UV observations - Regional networks – some international coordination under NDACC - Instrumentation:Spectroradiometers – mostly Brewers (MKIV, MKIII) Multi-channel narow-band radiometers UV-Biometers – erythemal UV - Calibration – NIST & PTB reference lamps – commercial agencies/laboratories • Conclusions • - World references not implemented, some calibration activities by the WRC Davos • SOPs are being defined for Brerwers and for UV-Biometers (COST-726) • Observation infrastructures in the regional scale → a week data exchange • Observation activities often under temporary projects → restricted data 7ORM, Geneva, 2008 K. Vanicek, CHMI

  14. Key topics for the suggestions Maintenance of networksPriority to be given to the tropics and Central Asia → Capacity Building Compatibility of dataComparison of different instruments and algorythms → Research Needs Re-evaluation of problematic data recorTechnological workshop followed by re-processing - suggested yesterday Observation techniques for high latitudesCalibration and stray light issues to be further investigated including special missions (SAUNA 2006/2007 Integration of new instrumentation (UV-VIS, FTIR. MIcrowave, airborn)Definition of SOPs, DQ and metadata records for the operational instruments 7ORM, Geneva, 2008 K. Vanicek, CHMI

  15. Key topics for the suggestions Spectroscopic standardsStandardization of cross sections for ozone and related speciesin (UV → IR) → Research Needs Coordination of existing infrastructuresGAW, NDACC→IGACO, GCOS, CEOS, GAW Strategic Plan Global UV monitoring system- International calibration infrastructure to be created, - Observations not restricted and widely deposited into WOUDC - Public information services further implemented 7ORM, Geneva, 2008 K. Vanicek, CHMI

  16. Thank You

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