9. Validation

Fig. 9-1
A scheme of the SCIAMACHY validation organisational structures set-up by SCIAVALIG (light orange) and by ESA (pale blue). The validation scientists actually doing the work are supported by both organisations, if they have an approved AO proposal for SCIAMACHY validation (green). (graphics: DLR-IMF and KNMI)
Fig. 9-2a
Ground-based stations contributing to SCIAMACHY validation and associated SCIAMACHY data products. The last column includes UV, CF (cloud fraction), CTP (cloud top pressure) and AAI (absorbing aerosol index). (graphics: KNMI and DLR-IMF)
Fig. 9-2b
Ground-based stations contributing to SCIAMACHY validation and associated SCIAMACHY data products. The last column includes UV, CF (cloud fraction),
CTP (cloud top pressure) and AAI (absorbing aerosol index). (graphics: KNMI and DLR-IMF)
Fig. 9-3
Global distribution of validation sites. Symbols and colour codes are as follows: triangles = core validation station, blue = NDSC network, red = Russian/NIS M-124 network, purple = NDSC and Russian/NIS M-124 network, green = no network, yellow square or envelope = balloon launch site. (graphics: DLR-IMF with Earth map from NASA – Visible Earth)
Fig. 9-4
The German research vessel Polarstern. (photo: E. Fahrbach)
Fig. 9-5
Route of the Polarstern cruise during the ANT XIX campaign between November 2001 and May 2002. (graphics: DLR-IMF)
Fig. 9-6
Falcon flight tracks for the September 2002 (left) and February/March 2003 (right) SCIA-VALUE airborne campaigns. In red are the northern tracks (September 3-8, 2002 and February 19 – March 3, 2003) while the southern tracks (September 15-28, 2002 and March 10-19, 2003) are displayed in yellow. (graphics: DLR-IMF)
Fig. 9-7
The Falcon aircraft with the viewing directions of the validation instruments. (image: Fix et al. 2005)
Fig. 9-8
Difference between the ozone columns retrieved from SCIAMACHY and from GOME with the same scientific algorithms. The relative differences are displayed in colour, as a function of the day since January 1st, 2003 (horizontal axis) and the latitude (vertical axis). Data is presented with a latitude resolution of 1 degree and time resolution of 1 day. The colour scale represents the ratio (SCIAMACHY-GOME)/GOME in %. The SCIAMACHY O3 columns are retrieved by KNMI. (image: H. Eskes, KNMI)
Fig. 9-9
Tropospheric NO2 column obtained by SCIAMACHY together with the Falcon flight track in red showing where AMAX-DOAS measured almost simultaneously. In the inset tropospheric NO2 columns from AMAX-DOAS are plotted versus those from SCIAMACHY. The SCIAMACHY tropospheric NO2 columns are retrieved by IUP-IFE, University of Bremen. (image: Heue et al. 2005)
Fig. 9-10
Intercomparison of BrO vertical columns retrieved from GOME, SCIAMACHY and ground-based DOAS measurements at Harestua, Norway, 60°N, 10°E. SCIAMACHY data products from the ESA NRT processor version 5.01 are shown together with scientific retrievals performed at BIRA-IASB. Airmass factors used to convert slant columns to vertical columns are calculated using same atmospheric profiles in all cases. (image: Van Roozendael et al. 2004)
Fig. 9-11
Global mean and standard deviation of the difference between collocated SCIAMACHY and ECMWF water vapour columns for the year 2003. The SCIAMACHY H2O columns are retrieved by IUP-IFE, University of Bremen. (image: Noël et al. 2005)
Fig. 9-12
Averaged O3 profiles with their standard deviations (dashed lines) and errors (shaded areas) for 145 collocated measurements from SCIAMACHY (blue) with 6 different lidars (yellow). An altitude shift of -1.5 km has been applied to the SCIAMACHY data. The SCIAMACHY O3 profiles are retrieved by IUP-IFE, University of Bremen. (image: Brinksma et al. 2006)


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