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Report from the 2 nd ACVE Workshop Frascati, Italy, 3-7 May 2004

Report from the 2 nd ACVE Workshop Frascati, Italy, 3-7 May 2004. Yasmine Calisesi International Space Science Institute. ENVISAT Atm. Chem. Payload. MIPAS: Michelson Interferometer for Passive Atmospheric Sounding. Near to mid-IR. O 3 , H 2 O, CH 4 , N 2 O, HNO 3 , T. Z 3 km. Z 5-150 km.

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Report from the 2 nd ACVE Workshop Frascati, Italy, 3-7 May 2004

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  1. Report from the 2nd ACVE WorkshopFrascati, Italy, 3-7 May 2004 Yasmine Calisesi International Space Science Institute

  2. ENVISAT Atm. Chem. Payload • MIPAS: Michelson Interferometer for Passive Atmospheric Sounding. Near to mid-IR. O3, H2O, CH4, N2O, HNO3, T. Z 3 km. Z 5-150 km. • GOMOS: Global Ozone Monitoring by Occultation of Stars. UV/Vis/IR. O3, NO2, NO3, OClO, T, H2O. Z < 2 km. Z tropop. – 100 km. • SCIAMACHY: SCanning Imaging Absorption SpectroMeter for Atmospheric CHartographY (« GOME II »). UV/Vis/IR. O2, O3, ClO, H2O, CH4… Z 3 km. Z 0 – 100 km.

  3. ACVE-2 Purpose: • To discussinstrument by instrument and species by species the validation results • To reassess the quality of the data products • To refine the error bars for the products • Participants: ACVT (Atm. Chem. Valid. Teams) • 1rst ACVE Workshop: Frascati, Dec. 2002

  4. CONCLUSIONS ACVE-1 (Dec. 2002): SCIAMACHY: Errors in Level 1 products related to the instrument calibration propagate into Level 2 products Operational products do not meet the required accuracy additional work on calibration andupdates to the algorithms required. MIPAS Level 1 datasets ~ OK. Release of Level 1 products recommended. Additional improvements to Level 2 productsto correct for the effect of cloud cover at altitudes below 20 km required. GOMOS O3 ~ OK (!). Improvements to the GOMOS algorithms, updated Level 2 products, and continued validation work recommended.

  5. Validation Dataset (black: sufficient quality for validation) April 2004 (red: sparse data or non mature algorithms)

  6. Mandatory:use thereprocessed ENVISAT Cal/Val datasetreleased in early 2004 Status of MW Data in Cal/Val DB:

  7. SCIAMACHY O3 Profile Validation E. Brinksma, KNMI

  8. I. Boyd

  9. 5% (4%) 17–40 km 3% (4%) 20-40 km

  10. GOMOS Level 2 Processor StatusO. Fanton d’Andon, ACRI

  11. GOMOS Profiles ValidationY. Meijer, RIVM and TU Eindhoven

  12. GOMOS H2O ProfilesT. Suortti, Finnish Met. Inst.

  13. MIPAS L2 ChangesB. Carli, IFAC - CNR

  14. MIPAS O3 ProfilesT. Blumenstock, IMK/FZK

  15. MIPAS H2OG. Pappalardo, IMAA-CNR • Further Comp. Results (Lidar/Sondes) • General good agreement • MIPAS H2O < Sondes, Lidar 10 – 13 km • Larger validation dataset would be helpful

  16. MIPAS SummaryH. Fischer, IMK/FZK

  17. ACVE-2 Closing RemarksP. Snoeij, ESA

  18. More information on: http://envisat.esa.int http://nadir.nilu.no/calval

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