1. ESTEC 11-13 March 2004 COST Action #723 WG2 OVERVIEW “An assimilated Ozone and Humidity Dataset” W.A. Lahoz DARC, Reading, UK http://darc.nerc.ac.uk Thanks to Alan Geer & Dominique Fonteyn

2. ESTEC 11-13 March 2004 COST Action #723 Aims Participants Workplan Deliverables Timetable Research themes Future work COST Action plan Topics COST workshop & WG2 presentations

3. ESTEC 11-13 March 2004 COST Action #723 Algorithms to assimilate UTLS datasets into troposphere/stratosphere GCMs & CTMs  Build on theory  Retrieval/forward model algorithms -> radiance assimilation  Synergy (limb/nadir, different tools, chemistry/dynamics,…)  Apply to NWP, chemical forecasting systems QC-datasets of UTLS O 3 & H 2 O for use by scientific community  cal-val (e.g. Envisat,…) Use algorithms & QC-datasets -> (co-operation) -> Assess state of UTLS & “understand” processes, using data (analyses, …) Information -> comprehensive analysis of anthropogenic impact on UTLS region Aims

4. ESTEC 11-13 March 2004 COST Action #723 Statistics are a global mean at 10hPa Ozone monitoring statistics at 10hPa in DARC assimilation Analysis O-B Residuals Number of accepted observations Observations Background Cal-val: MIPAS

5. ESTEC 11-13 March 2004 COST Action #723 MIPAS ozone O-B 22 –29 Sep 2002 global mean Gaussian curve bias Gaussian errors

6. ESTEC 11-13 March 2004 COST Action #723 Nadir/limb synergy (see Struthers et al. JGR 2002) Assimilation of MLS ozone (limb) & GOME total ozone (nadir) Ozone analyses using both geometries are objectively “better” (more consistent with a BLUE) than those using just one or other of the geometries -> apply to Envisat Synergy

7. ESTEC 11-13 March 2004 COST Action #723 Global map of ozone column amount 21 April 1997 12 GMT MLS ozone profile + GOME column ozone (Dobson units: red high, blue low)

8. 9-10 September 2002COST Action #723 Synergy of Envisat data Ozone distribution in space + time (+more species) Limb geometry: Height resolved information Nadir geometry: Constraint on total information Partition information between troposphere and stratosphere Atmosphere Envisat hνhν hνhν MIPAS (limb), SCIAMACHY (limb), GOMOS (occultation) SCIAMACHY (nadir)

9. ESTEC 11-13 March 2004 COST Action #723 The SH polar vortex split of Sep 2002 MIPAS ozone DARC analyses Blue: low ozone; Red: high ozone; 10 hPa Courtesy Alan Geer Filling in gaps in knowledge

10. ESTEC 11-13 March 2004 COST Action #723 O 3 evolution 31.5hPa; 22 Sep -> 25 Sep 2002 ACRI GOMOS analyses Red (high), blue (low) Synergy: different tools

11. ESTEC 11-13 March 2004 COST Action #723 COST WG2 N 2 O from ODIN/SMR Assimilated into MSDOL 55 hPa Sep 2002 SH Laaziz EL Amraoui & Philippe Ricaud Obs. Bordeaux Synergy: different tools

12. ESTEC 11-13 March 2004 COST Action #723 Ozone 475K ClOx = ClO+2*Cl 2 O 2 475K 24 Sep 2002 12UTC: Ozone photochemistry BIRA-IASB MIPAS analyses: red (high), blue (low) unobserved Synergy: different tools & unobserved species

13. ESTEC 11-13 March 2004 COST Action #723 Assimilated and measured ozone profiles over Lerwick GOME Courtesy KNMI Better agreement with profile assimilation Algorithms

14. ESTEC 11-13 March 2004 COST Action #723 GOME Total ozone assimilated 7-yr dataset: GOA www.knmi.nl/goa Henk Eskes & Arjo Segers KNMI QC-dataset

15. ESTEC 11-13 March 2004 COST Action #723  ASSET partners (NWP systems, sophisticated photochemical models, retrievals, data dissemination) -> links with theory & instrument teams  Lab studies / atmospheric photochemistry (J. Heyrovský, IPC, Ac. Sciences Czech Rep., Prague & Obs. Aquitain des Sciences de l’Univers, Lab. d’Astrodynamique, d’Astronomie et d’Aéronomie, Bordeaux)  More… COST action a basis for co-operation: meetings, workshops, visits, summer schools,… Co-operation

16. ESTEC 11-13 March 2004 COST Action #723 Studies of Sep SH 2002 & other periods (e.g. for cal-val of Envisat data) Assimilation of MIPAS & ODIN (ongoing), GOMOS (started), SCIAMACHY,… H 2 O QC-datasets Radiance assimilation Studies with data from future missions (Eos Aura,…) -> Co-operation between all actors: instrument teams, theory, NWP, modellers, DA, EO… Encourage groups to use Short-Term Scientific Mission (STSM) funds for visits -> Basis to consolidate group members & workplan Future

17. ESTEC 11-13 March 2004 COST Action #723 Material for WG2 discussion on Friday

18. ESTEC 11-13 March 2004 COST Action #723 DARC, University of Reading, UK (W. Lahoz) KNMI, The Netherlands (P. Siegmund, H. Kelder) U. Köln, Germany (H. Elbern) Bordeaux Observatory, France (J. Urban, P. Ricaud) CNR, Rome, Italy (F. Fierli) Academy of Sciences, Czech Republic (Z. Zelinger) Others (ASSET partners & associates,…) Group members

19. ESTEC 11-13 March 2004 COST Action #723 Algorithms to assimilate research satellite data in UTLS (retrievals/forward models; radiance assimilation) Assimilation of L2 data (T, O 3, H 2 O,…) into GCMs & CTMs Evaluation of models & observations (assimilation,…) Evaluation of key parameters in UTLS Synergy: limb/nadir geometries, chemistry/dynamics,… QC-datasets (+metadata) in UTLS (T, O 3, H 2 O) Deliverables (algorithms, QC-datasets, reports,…) Workplan

20. ESTEC 11-13 March 2004 COST Action #723 Algorithms to assimilate data into GCMs & CTMs Report/evaluation on UTLS assimilated datasets Report on UTLS: (i) dynamics, (ii) chemistry, & (iii) climate Report on synergies: nadir/limb,… QC-datasets (+metadata) in UTLS (T, O 3, H 2 O) Report on assimilation of limb radiances into GCMs & CTMs Deliverables

21. ESTEC 11-13 March 2004 COST Action #723 Summary progress reports for WG2 (Months 12, 24, 36, 48) Report of algorithms (Month 48) Quality –controlled datasets (Month 48) Preliminary studies on radiances (Month 48) Timetable