Bern 6-7 October 2003 COST Action #723 COST WG2 WG2: “An assimilated Ozone and Humidity Dataset” W.A. Lahoz DARC, Reading, UK Thanks to Alan Geer & Mike Keil for plots

Bern 6-7 October 2003 COST Action #723 COST WG2 Aims (WG2) Participants Workplan Deliverables Timetable Examples (assimilation/evaluation/synergy/QC- datasets) Future work COST Action plan

Bern 6-7 October 2003 COST Action #723 COST WG2 AIMS (WG2): Algorithms to assimilate UTLS datasets into troposphere/stratosphere GCMs & CTMs QC-datasets of UTLS O 3 & H 2 O for use by scientific community Assess state of UTLS & understand processes, using data (assimilation analyses, …) Information -> comprehensive analysis of anthropogenic impact on UTLS region

Bern 6-7 October 2003 COST Action #723 COST WG2 EXAMPLES

Bern 6-7 October 2003 COST Action #723 COST WG2 DARC

Bern 6-7 October 2003 COST Action #723 Self-consistency MIPAS ozone O-A 22 –29 Sep 2002 global mean on pressure levels MIPAS biased high wrt 1.6hPa Evidence of spin-up ~9 hPa COST WG2

Bern 6-7 October 2003 COST Action #723 Self-consistency MIPAS ozone O-B 22 –29 Sep 2002 global mean Gaussian curve bias COST WG2

Bern 6-7 October 2003 COST Action #723 COST WG2 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

Bern 6-7 October 2003 COST Action #723 QC-dataset Ozone analyses at 10hPa Sep 2002 SH

Bern 6-7 October 2003 COST Action #723 COST WG2 KNMI

Bern 6-7 October 2003 COST Action #723 COST WG2 Evaluation vs independent data Lindenberg (52N, 14E; 19/04/00) Blue: Fortuin-Kelder climatology Green: Ozonesonde Red: O 3 profile from KNMI GOME ozone column assimilation Magenta: O 3 profile from KNMI GOME ozone profile assimilation Henk Eskes & Arjo Segers, KNMI

Bern 6-7 October 2003 COST Action #723 QC-dataset GOME Total ozone assimilated 7-yr dataset: GOA Henk Eskes & Arjo Segers KNMI

Bern 6-7 October 2003 COST Action #723 A. Sci. CZ/Obs. Bordeaux COST WG2

Bern 6-7 October 2003 COST Action #723 J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, Prague Observatoire Aquitain des Sciences de l’Univers, Laboratoire d’Astrodynamique, d’Astronomie et d’Aéronomie de Bordeaux Co-operation: Odin observations for analyses of H 2 O,O 3 & other species (e.g. H 2 CO, CF 2 O,HCN,…) -> information on concentrations Above species are key for atmospheric photochemistry-> datasets for assimilation into photochemical models & evaluation Analyses complemented by lab studies of line shapes of H 2 O, O 3 & other species

Bern 6-7 October 2003 COST Action #723 Obs. Bordeaux COST WG2

Bern 6-7 October 2003 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

Bern 6-7 October 2003 COST Action #723 COST WG2 FUTURE WORK: Studies of Sep SH 2002 & other periods Assimilation of H 2 O data (errors) Assimilation of ODIN (ongoing), GOMOS (started), SCIAMACHY,… H 2 O QC-datasets Radiance assimilation Studies with data from future missions (Eos Aura,…)

Bern 6-7 October 2003 COST Action #723 COST WG2 EXTRA MATERIAL

Bern 6-7 October 2003 COST Action #723 COST WG2 AIMS (WG2): Develop algorithms to assimilate an increasing variety of UTLS datasets into GCMs & CTMs that encompass troposphere & stratosphere Provide quality-controlled assimilated datasets of UTLS O 3 & H 2 O for use by scientific community Assess state of UTLS & understand processes, using assimilated data & other data records Use collected information to give a comprehensive analysis of anthropogenic impact on UTLS region

Bern 6-7 October 2003 COST Action #723 COST WG2 PARTICIPANTS: 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…

Bern 6-7 October 2003 COST Action #723 COST WG2 WORKPLAN: Algorithms to assimilate research satellite data in UTLS 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,… QC-datasets* (+metadata) in UTLS (T, O 3, H 2 O)

Bern 6-7 October 2003 COST Action #723 COST WG2 WORKPLAN (1): Algorithms to assimilate research satellite data (e.g., GOME, ODIN, Envisat) into GCMs & CTMs Assimilation of retrieved research satellite data (troposphere, temperature, O 3, H 2 O, NO 2, N 2 O, ClO) into GCMs & CTMs Evaluation of assimilation algorithm, model, & retrieval parameters Evaluation of existing & future UTLS datasets: (i) assimilation, (ii) comparison between assimilated datasets, (iii) comparison between constrained & non-constrained model datasets, and (iv) comparison with independent data

Bern 6-7 October 2003 COST Action #723 COST WG2 WORKPLAN (2): Evaluation of key parameters in UTLS to study (i) dynamics, (ii) chemistry, & (iii) climate Evaluation of merit of combining limb & nadir geometries using, e.g., measurement techniques, assimilation studies Production of quality controlled datasets in UTLS including documentation: (i) temperature, (ii) O 3, & (iii) H 2 O Assimilation of limb radiances into GCMs & CTMs

Bern 6-7 October 2003 COST Action #723 COST WG2 DELIVERABLES: 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

Bern 6-7 October 2003 COST Action #723 COST WG2 DELIVERABLES (1): Algorithms to assimilate research satellite into GCMs & CTMs Report on available UTLS assimilated datasets including evaluation of data quality, documentation & contact points Report on key parameters in UTLS to study (i) dynamics, (ii) chemistry, & (iii) climate

Bern 6-7 October 2003 COST Action #723 COST WG2 DELIVERABLES (2): Report on merit of combining limb and nadir geometries using, e.g., measurement techniques, assimilation studies Quality controlled datasets in UTLS including documentation: (i) temperature, (ii) ozone, and (iii) water vapour Report on assimilation of limb radiances into GCMs and CTMs

Bern 6-7 October 2003 COST Action #723 COST WG2 TIMETABLE: 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)

Bern 6-7 October 2003 COST Action #723 COST WG2 Unassimilated data MLS O 3 data 10 hPa 1 Feb 1997 Blue (low) Red (high)

Bern 6-7 October 2003 COST Action #723 COST WG2 Assimilated data O 3 analysis 12 GMT Met Office AC scheme Operational data + MLS T + MLS O 3 10 hPa 1 Feb 1997 Blue (low) Red (high)

Bern 6-7 October 2003 COST Action #723 COST WG2 Evaluation vs independent data a)-d) Ozonesonde comparisons Line: Ozonesonde Stars: Analyses (MLS+GOME) Diamonds: Initial data (Fortuin+ Kelder Climatology)

Bern 6-7 October 2003 COST Action #723 COST WG2 Evaluation vs independent data HALOE Comparisons 3 week average MLS+GOME analyses Line: O-A Dashed line: 1  error

Bern 6-7 October 2003 COST Action #723 COST WG2 Evaluation vs independent data TOMS Comparison 3 week average MLS+GOME analyses Line: O-A Dashed line: 1  error

Bern 6-7 October 2003 COST Action #723 COST WG2 Nadir/limb synergy (see Struthers et al. JGR 2002) a) MLS only, b) GOME Only, c) MLS+GOME O-A rms: straight line (O is MLS) MLS error: dashed line

Bern 6-7 October 2003 COST Action #723 COST WG2 Nadir/limb synergy a) MLS only, b) GOME only, c) MLS+GOME O-A rms: straight line (O is GOME) GOME error: dashed line

Bern 6-7 October 2003 COST Action #723 Participation on analyses of averaged spectra - detection and identification of very weak lines: global averages of spectra pre-selected bandwidths residuals for different bands: y meas - y(x) R.T.Moliere  weak + unknown lines H 2 O 2, HO 2 ? special interest - the chemistry and photo-physics of FC(O)O x radicals - a likely product of the photo-dissociation of CF 2 O and CFClO, in 1989 concentration estimate of CF 2 O 1.4 x molecule cm -3 (18 km), increase by 10 % each year J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, Prague Observatoire Aquitain des Sciences de l’Univers, Laboratoire d’Astrodynamique, d’Astronomie et d’Aéronomie de Bordeaux Starting points of cooperation between:

Bern 6-7 October 2003 COST Action #723 Laboratory Line shape, broadening, intensities, rate constants, branching ratios IR region and MW region with the help of FTIR spectrometer, IR diode lasers, MW sources H 2 CO broadening not measured yet in IR and mm region, N 2 O, CH 3 CN (+STEAM), CF 2 O, CH 3 Cl, CH 3 Br if appear in averaged spectra Interpretation the chemistry and photophysics of FC(O)O x radicals is not well understood part of the chemistry of the stratosphere - precursor CF 2 O HCN model deficit, role of CH 3 CN influence and reactions of CH 3 Cl, CH 3 Br, role of radicals CH 2 Cl, CH 2 Br

Bern 6-7 October 2003 COST Action #723 B: STD RH (%) December New Dynamics 50 levels 0-63 km NMC Method

Bern 6-7 October 2003 COST Action #723 B: RH correlations, December. New Dynamics: NMC Method 16 km 19.7 km

Bern 6-7 October 2003 COST Action #723 COST WG2 BENEFICIARIES OF COST ACTION EO Community (end users) Weather Agencies Space agencies Instrument builders Climate Modellers Policy makers