1. Page 1Validation by Balloons and Aircraft - ESRIN - 9–13 December 2002 Validation of MIPAS on ENVISAT by in situ instruments on the M55-Geophysica J. Heland, H. Schlager, C. Schiller, N. Sitnikov, A. Ulanovsky, F. Ravegnani, C. M. Volk, A. Werner, A. Petritoli, I. Kostadinov, F. Stroh, M. v. Hobe, C. Blom, and the Geophysica-Team - Motivation - M55-Geophysica In Situ Instrumentation - Internal Quality Checks - Comparison with MIPAS-E data - Conclusions

2. Page 2Validation by Balloons and Aircraft - ESRIN - 9–13 December 2002 Background To fully exploit ENVISAT satellite data for science & for pollution and global change monitoring extensive validations are needed Advantages of in situ aircraft data for validation of satellite data: - many species are measured simultaneously - independent, well characterized and proven techniques - high accuracies - high spatial and temporal resolution - ability to sample highly coincident data

3. Page 3Validation by Balloons and Aircraft - ESRIN - 9–13 December 2002 M55-Geophysica In Situ Instrumentation...put the table here...

4. Page 4Validation by Balloons and Aircraft - ESRIN - 9–13 December 2002 Quality Checks of July 2002 M55-Geophysica Data

5. Page 5Validation by Balloons and Aircraft - ESRIN - 9–13 December 2002 M55-Geophysica Flight on 22 July 2002

6. Page 6Validation by Balloons and Aircraft - ESRIN - 9–13 December 2002 O 3 Consistency & Comparison approx. altitude (km)

7. Page 7Validation by Balloons and Aircraft - ESRIN - 9–13 December 2002 TP @ 350 K  (K) HNO 3 Consistency & Comparison July 2002

8. Page 8Validation by Balloons and Aircraft - ESRIN - 9–13 December 2002  (K) H 2 O Comparison, July & October 2002

9. Page 9Validation by Balloons and Aircraft - ESRIN - 9–13 December 2002 TP @ 350 K CH 4 & N 2 O Comparison on 22 July 2002

10. Page 10Validation by Balloons and Aircraft - ESRIN - 9–13 December 2002 First HALOX ClONO 2 Measurements, preliminary  First measurements of ClONO 2 by HALOX during October 2002 campaign  Night time data are consistent with previous observations and models  HALOX will measure ClONO 2 as a standard product during the Arctic validation campaign in Feb./Mar. 2003 Volume Mixing Ratio (pptV)  (K)

11. Page 11Validation by Balloons and Aircraft - ESRIN - 9–13 December 2002 Summary Validation Campaigns: - in situ data successfully collected with M55-Geophysica during July and October 2002 Aircraft Data Status: - all in situ data available for July 2002 - preliminary data available for October 2002 Data Quality Checks: - NO y comparison with climatological average (ER-2) - N 2 O-NO y correlation compared with previous observations - NO y /O 3 correlation compared with previous observations - O 3 comparison with models and climatological mean

12. Page 12Validation by Balloons and Aircraft - ESRIN - 9–13 December 2002 Conclusions - The M55-Geophysica in situ data from July 2002 are of high quality and are ready for comparison with ENVISAT data - First comparisons with MIPAS-E standard products from 4 limb scans: only for stratospheric measurements

13. Page 13Validation by Balloons and Aircraft - ESRIN - 9–13 December 2002 - Larger deviations and variances in tropopause region - First comparisons look promising, but more comparisons are needed for sound assessment of ENVISAT data quality - Next validation campaign: February/March 2003 in Kiruna Conclusions (cont’d)