1. GROUND-BASED ANALYSIS OF NADIR NO2 COLUMNS
SCIAMACHY L-1b-2 OL 3.0 => 3.01
GROUND-BASED ANALYSIS OF
NADIR NO2 COLUMNS
J.-C. Lambert, J. Granville, F. Hendrick,
P. Gerard, M. Van Roozendael,
and the NDACC / UVVIS Working Group

2. SCIAMACHY L-1b-2 OL 3.0 => 3.01
NDACC network of DOAS/SAOZ UVVIS
Archives: Cal/Val, NDACC, priv. comm.
Diurnal cycle effects
minimised
Comparisons of
optical path
matching data
Time, SZA and NO2C dependence
at every station
Statistical analysis
UVVIS

3. NDACC UVVIS data courtesy: NIWA

4. NDACC UVVIS data courtesy: NIWA

5. NDACC SAOZ data courtesy: CNRS/SA

6. NDACC SAOZ data courtesy: CNRS/SA

7. NDACC SAOZ data courtesy: CNRS/SA

8. NDACC SAOZ data courtesy: CNRS/SA

9. Global Annual Mean Agreement (2002-2005)
UVVIS

10. Global Tri-monthly Agreement (2002-2005)

11. Global Tri-monthly Agreement (2002-2005)

12. SCIAMACHY L-1b-2 OL 3.0 => 3.01 CONCLUSION ON NO2 TOTAL COLUMNS
Both OL 3.0 and OL 3.01 generate NO2 column data consistent with NDACC and GOME data records.
Major problems of IPF 5.04 definitively solved.
SCIAMACHY OL 3.01 is low biased wrt GOME GDP 4.1 and NDACC in SH, by about molec.cm-2.
Low bias exhibits seasonal cycle and meridian structure.
GO for operational processing and public delivery, with clear disclaimer.