1. KNMI Ozone Satellite Observations
Pepijn Veefkind
Piet Stammes
Olaf Tuinder
Ronald van der A
Mark Kroon
Peter van Velthoven
Pieternel Levelt

2. Contents OMI on EOS-Aura GOME-2 Ozone Profile product
TROPOMI status and plans
Multi-Sensor Reanalysis
Data Dissemination 2
WMO UNEP Ozone Research Managers Meeting, 2-4 May 2011

3. Ozone Monitoring Instrument on EOS-Aura
OMI is the Dutch-Finnish contribution to NASA EOS-Aura
KNMI is the PI institute for OMI.
OMI was launched in July 2004, more than 6 years data already!
Mission extended to at least 2013.
Radiometrically the instrument is extremely stable. UV degradation ~1%.
OMI data of recent years have reduced coverage. 3
WMO UNEP Ozone Research Managers Meeting, 2-4 May 2011

4. Ozone Monitoring Instrument on EOS-Aura
Plot showing the radiometric degradation of OMI.
After 6 years in orbit the UV-2 degradation is ~1%. Figure: G. Jaross, SSAI
OMI daily coverage for the data after January Earlier years have daily global coverage. 4
WMO UNEP Ozone Research Managers Meeting, 2-4 May 2011

5. OMI DOAS Total Ozone Product
Total ozone retrieval using the DOAS method.
Produced as offline, near-real-time and very-fast delivery product (Europe only, co-operation with FMI)
Current algorithm version
In 2011 a reprocessing of OMDOAO3 is planned that includes the following improvements:
Switch from Bass-Paur to Brion-Daumont-Malicet ozone cross sections.
Spectral calibration on every ground pixel.
Improved treatment of sea-ice pixels.
Consistent retrieval for the whole dataset. 5
WMO UNEP Ozone Research Managers Meeting, 2-4 May 2011

6. OMI OMO3PR Ozone Profile Product
Based on optimal estimation algorithm.
High horizontal resolution of ~60x50 km2. Vertical resolution 6-7 km.
Dataset Oct present.
Extensive validation using MLS on the same platform as OMI.
OMO3PR data for one orbit of data.
This product contains 3D ozone profile information, as well as the total column ozone. 6
WMO UNEP Ozone Research Managers Meeting, 2-4 May 2011

7. OMI OMO3PR Ozone Profile Product - Validation
Average (left plot) and difference (right plot) of a week of OMI and MLS ozone profiles collocated over Antarctica [90S-75S]. The legend reports the numbers characterizing the time frame and statistics of this collocation.
Validation paper using MLS, sonde, SAGE and GOMOS data in review. 7
WMO UNEP Ozone Research Managers Meeting, 2-4 May 2011

8. GOME-2 Ozone Profile Product
Derived from GOME-2 on Metop-A
Data produced in NRT (<3 h) within the EUMETSAT O3MSAF project
Data record 2007-present
For data access, see and
Ozone profiles from two GOME-2’s after Metop-B launch in April 2012
Example of GOME-2 ozone profile information during the 2011 NH low ozone event. 8
WMO UNEP Ozone Research Managers Meeting, 2-4 May 2011

9. GOME-2 Ozone Profile Product - Validation
Comparison of GOME-2 midlatitude profiles with in-situ sonde and ground based microwave observations.
Credits: Delcloo (KMI) and Lins (DWD) 9
WMO UNEP Ozone Research Managers Meeting, 2-4 May 2011

10. Height-resolved Antarctic ozone hole structure in 2008
Van Peet et al., GRL, 2009 10
WMO UNEP Ozone Research Managers Meeting, 2-4 May 2011

11. GMES ATMOSPHERE MISSION IN POLAR ORBIT
sentinel-5 precursor
GMES ATMOSPHERE MISSION IN POLAR ORBIT
The ESA Sentinel-5 Precursor (S-5P) is a pre-operational mission focussing on global observations of the atmospheric composition for air quality and climate.
The TROPOspheric Monitoring Instrument (TROPOMI) is the payload of the S-5P mission and is jointly developed by The Netherlands and ESA.
The planned launch date for S-5P is 2014 with a 7 year design lifetime.
UV-VIS-NIR-SWIR nadir view grating spectrometer.
Spectral range: , , nm
Spectral Resolution: nm
Spatial Resolution: 7x7km2
Global daily coverage at 13:30 local solar time.
TROPOMI
Total column O3, NO2, CO, SO2,CH4, CH2O,H2O,BrO
Tropospheric column O3, NO2
O3 profile
Aerosol absorbing index, type, optical depth
CONTRIBUTION TO GMES

12. TROPOspheric Monitoring Instrument
TROPOMI is developed by The Netherlands in co-operation with ESA.
KNMI is the PI institute
Compared to OMI:
6x higher spatial resolution 7x7 km2 vs. 13x24 km2
1-5x higher signal to noise
better cloud information oxygen A band ( nm) added
CO and CH4 observations SWIR band ( nm) added
TROPOMI optical design.
Figure: Dutch Space 12
WMO UNEP Ozone Research Managers Meeting, 2-4 May 2011

13. Multi Sensor Reanalysis (MSR) of total ozone
Long term data record based on a large number of satellite sensors and ground based Brewer-Dobson stations.
Data assimilation is applied to provide a global consistent dataset.
MSR dataset is available at .
Van der A, R. J., Allaart, M. A. F., and Eskes, H. J.: Multi sensor reanalysis of total ozone, Atmos. Chem. Phys., 10, , doi: /acp , 2010. 13
WMO UNEP Ozone Research Managers Meeting, 2-4 May 2011

14. Data used for the Multi Sensor Reanalysis (MSR) of ozone
TOMS Nimbus 7: TOMS v.8 NASA
TOMS EarthProbe: TOMS v.8 NASA
SBUV 7, 9a, 9d, 11, 16: SBUV v.8 NOAA
GOME : GDP v.4 ESA/DLR
GOME : TOGOMI v1.2 KNMI
SCIAMACHY : SGP v.3 ESA/DLR
SCIAMACHY : TOSOMI v KNMI
OMI : TOMS v.3 NASA
OMI : DOAS v.3 KNMI
GOME-2 : GDP v EUMETSAT/DLR
WOUDC: Brewer(3,4), Dobson, Filter

15. 30 year of assimilated ozone based on bias-corrected satellite data

16. Data Dissemination and More Information 16
WMO UNEP Ozone Research Managers Meeting, 2-4 May 2011

17. Summary KNMI instrument involvement as PI institute:
OMI on Aura (2004-present)
TROPOMI on ESA/GMES Sentinel 5 Precursor (planned launch 2014)
KNMI ozone data products:
Total ozone: OMI and SCIAMACHY
Ozone profile: OMI and GOME-2
Multi-Sensor Reanalysis (MSR) of total ozone
Assimilated ozone profile dataset will be made in the ESA CCI project
Data dissemination through temis.nl, O3MSAF, NASA and EUMETSAT web sites 17
WMO UNEP Ozone Research Managers Meeting, 2-4 May 2011

18. 2011 NH Low Ozone: Febr.-March