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

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Presentation transcript:

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 km. GOMOS: Global Ozone Monitoring by Occultation of Stars. UV/Vis/IR. O 3, NO 2, NO 3, OClO, T, H 2 O.  Z < 2 km. Z tropop. – 100 km. SCIAMACHY: SCanning Imaging Absorption SpectroMeter for Atmospheric CHartographY (« GOME II »). UV/Vis/IR. O 2, O 3, ClO, H 2 O, CH 4 …  Z 3 km. Z 0 – 100 km.

ACVE-2 Purpose: To discuss instrument 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

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 and updates to the algorithms required. MIPAS Level 1 datasets ~ OK. Release of Level 1 products recommended. Additional improvements to Level 2 products to 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.

Validation Dataset (black: sufficient quality for validation) April 2004 (red: sparse data or non mature algorithms) GOMOSMIPAS SCIAMACHY GOPR6.0IPF4.61 IPF5.01 Dark LimbNRTOfflineNadir Limb densityPP TTT O2O2 O3O3 O3O3 O3O3 O3O3 O3O3 O3O3 H2OH2OH2OH2OH2OH2OH2OH2OH2OH2OH2OH2O NO 2 N2ON2ON2ON2ON2ON2ON2ON2ON2ON2O NO 3 HNO 3 OClO, Aerosol CH 4 OClO, BrO, H 2 CO, CO, CH 4, SO 2, Clouds, Aerosol

Mandatory: use the reprocessed ENVISAT Cal/Val dataset released in early 2004 Status of MW Data in Cal/Val DB: KirunaIRF220O3O3 Raffalski LauderNIWA214O3O3 Bodeker Mauna LoaUMass257O3O3 Bodeker Ny AlesundUBremen10O3O3 Kuenzi PayerneMCH688O3O3 Kaempfer RomeUAquila68IWVCiotti ZugspitzeFZK6O3O3 Hochschild

SCIAMACHY O3 Profile Validation E. Brinksma, KNMI

I. Boyd

 5% (4%) 17–40 km  3% (4%) km

GOMOS Level 2 Processor Status O. Fanton d’Andon, ACRI

GOMOS Profiles Validation Y. Meijer, RIVM and TU Eindhoven

GOMOS H 2 O Profiles T. Suortti, Finnish Met. Inst.

MIPAS L2 Changes B. Carli, IFAC - CNR

MIPAS O3 Profiles T. Blumenstock, IMK/FZK

MIPAS H 2 O G. Pappalardo, IMAA-CNR Further Comp. Results (Lidar/Sondes) General good agreement MIPAS H 2 O < Sondes, Lidar 10 – 13 km Larger validation dataset would be helpful

MIPAS Summary H. Fischer, IMK/FZK

ACVE-2 Closing Remarks P. Snoeij, ESA

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