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![Page 1: Validation by Model Assimilation/Satellite Intercomparison - ESRIN 9–13 December 2002 Expected Validation of Envisat Ozone Data E. Hilsenrath NASA Goddard.](https://reader035.fdocuments.in/reader035/viewer/2022070411/56649f425503460f94c6279f/html5/thumbnails/1.jpg)
Validation by Model Assimilation/Satellite Intercomparison - ESRIN 9–13 December 2002
Expected Validation of
Envisat Ozone Data
Expected Validation of
Envisat Ozone Data
E. HilsenrathNASA Goddard Space Flight Center
B. BojkovG. LabowScience Systems and Applications
![Page 2: Validation by Model Assimilation/Satellite Intercomparison - ESRIN 9–13 December 2002 Expected Validation of Envisat Ozone Data E. Hilsenrath NASA Goddard.](https://reader035.fdocuments.in/reader035/viewer/2022070411/56649f425503460f94c6279f/html5/thumbnails/2.jpg)
Validation by Model Assimilation/Satellite Intercomparison - ESRIN 9–13 December 2002
OutlineOutline
• Level 1 (radiance) validation– Satellite and ground
• Ozone Level 2 (column and profiles) validation– Satellite: SOLSE-2, SBUV/2, TOMS– Ground based: GSFC and Mauna Loa
• Results and Plans
1980 1990 2000 2010 2020
Year
280
290
300
310
Ozon
e (D
obso
n Un
its)
Nimbus 7 TOMS
Meteor TOMS
Earth Probe TOMS
recovery predicted by model
Global average ozone measured by TOMS compared with Model
eruption of Mt. Pinatubo65N - 65S
version 8 TOMS data
![Page 3: Validation by Model Assimilation/Satellite Intercomparison - ESRIN 9–13 December 2002 Expected Validation of Envisat Ozone Data E. Hilsenrath NASA Goddard.](https://reader035.fdocuments.in/reader035/viewer/2022070411/56649f425503460f94c6279f/html5/thumbnails/3.jpg)
Validation by Model Assimilation/Satellite Intercomparison - ESRIN 9–13 December 2002
Level 1 (Radiance) Validation-1Level 1 (Radiance) Validation-1
• Radiative transfer calculations to compare radiances
• Compute radiance from satellite profiles correcting for lighting conditions– Successfully employed SBUV/2 for GOME
(Hilsenrath, et al., 1996)– Three operational SBUV/2s in orbit– Similar to R. van der A (2001) for GOME– Will include Ring effect– Most applicable to profile channels
• Results– Limited SCIAMACHY Level 1b data
available
![Page 4: Validation by Model Assimilation/Satellite Intercomparison - ESRIN 9–13 December 2002 Expected Validation of Envisat Ozone Data E. Hilsenrath NASA Goddard.](https://reader035.fdocuments.in/reader035/viewer/2022070411/56649f425503460f94c6279f/html5/thumbnails/4.jpg)
Validation by Model Assimilation/Satellite Intercomparison - ESRIN 9–13 December 2002
Level 1 (Radiance) Validation-2Level 1 (Radiance) Validation-2
• Ground based validation of “radiances”, 300-400 nm
– Radiative transfer models show direct comparisons can be made irrespective of ozone and aerosol columns
– TOMS, SBUV/2, GOME, SCIAMACHY can be validated independent of algorithm.
– System undergoing test at GSFC using SSBUV instrument
• Results– No Level 1b data available over GSFC
![Page 5: Validation by Model Assimilation/Satellite Intercomparison - ESRIN 9–13 December 2002 Expected Validation of Envisat Ozone Data E. Hilsenrath NASA Goddard.](https://reader035.fdocuments.in/reader035/viewer/2022070411/56649f425503460f94c6279f/html5/thumbnails/5.jpg)
Validation by Model Assimilation/Satellite Intercomparison - ESRIN 9–13 December 2002
Space Shuttle (SOLSE) comparisonSpace Shuttle (SOLSE) comparison
• SOLSE Space Shuttle payload
– Test limb scattering technique
– Entire limb imaged on detector
– SOLSE-1 in 1997 gave limited data but good results
– SOLSE algorithm employed by SCIAMACHY and OSIRIS
• Results (SOLSE-2)
– Mission delayed to Jan 2003
![Page 6: Validation by Model Assimilation/Satellite Intercomparison - ESRIN 9–13 December 2002 Expected Validation of Envisat Ozone Data E. Hilsenrath NASA Goddard.](https://reader035.fdocuments.in/reader035/viewer/2022070411/56649f425503460f94c6279f/html5/thumbnails/6.jpg)
Validation by Model Assimilation/Satellite Intercomparison - ESRIN 9–13 December 2002
Mauna Loa Intercomparison CampaignMauna Loa Intercomparison Campaign
• NDSC sponsored campaign :– Ozone sondes– Microwave sounder– Three lidars– August 5-21, 2002
• Results– No profiles from SCIAMACY– No profiles from MIPAS– Limited profiles from GOMOS (ACRI)
1011 1012
ozone number density (/cm3)
0
10
20
30
40
50
altit
ude
(km
)
August 11, 2002
JPL lidarGSFC lidarballoonmicrow ave
![Page 7: Validation by Model Assimilation/Satellite Intercomparison - ESRIN 9–13 December 2002 Expected Validation of Envisat Ozone Data E. Hilsenrath NASA Goddard.](https://reader035.fdocuments.in/reader035/viewer/2022070411/56649f425503460f94c6279f/html5/thumbnails/7.jpg)
Validation by Model Assimilation/Satellite Intercomparison - ESRIN 9–13 December 2002
Total Ozone Column IntercomparisonTotal Ozone Column Intercomparison
• GSFC/Brewer comparisons– GSFC maintains highly calibrated
double Brewer for research and TOMS validation
– Aerosol and trace gas measurements
– Difference with TOMS is 3% rms
• Results– Very limited overpasses over GSFC
– Large biases observed
Scia. TOZ(+/-15 deg)
stddevScia. TOZ(+/-5 deg)
stddev Brewer TOZDiff
(S-B)2002 10 28 264.3 5.3 243.8 4.5 279.0 35.22002 10 28 234.7 10.7 - - 279.02002 11 04 220.5 2.3 220.4 2.2 291.2 70.82002 11 06 283.6 4.0 - - 283.42002 11 07 280.1 7.4 298.0 2.2 323.5 25.52002 11 16 306.2 7.5 - - 278.02002 11 17 309.1 23.7 276.3 9.5 262.3 -14.02002 11 22 287.9 15.6 - - 294.02002 11 23 280.4 3.2 282.5 4.1 297.6 15.1
Date
![Page 8: Validation by Model Assimilation/Satellite Intercomparison - ESRIN 9–13 December 2002 Expected Validation of Envisat Ozone Data E. Hilsenrath NASA Goddard.](https://reader035.fdocuments.in/reader035/viewer/2022070411/56649f425503460f94c6279f/html5/thumbnails/8.jpg)
Validation by Model Assimilation/Satellite Intercomparison - ESRIN 9–13 December 2002
SBUV/2 – SCIAMACHY total ozone comparisonsSBUV/2 – SCIAMACHY total ozone comparisons
• Meteo Lv2, version 3.53
• << 12 hours
• SCIA scene inside SBUV/2
SBUV/2 (N16) – SCIA (UV Window)958 Matchups 10/25-31 2002
![Page 9: Validation by Model Assimilation/Satellite Intercomparison - ESRIN 9–13 December 2002 Expected Validation of Envisat Ozone Data E. Hilsenrath NASA Goddard.](https://reader035.fdocuments.in/reader035/viewer/2022070411/56649f425503460f94c6279f/html5/thumbnails/9.jpg)
Validation by Model Assimilation/Satellite Intercomparison - ESRIN 9–13 December 2002
SBUV/2 – SCIAMACHY total ozone comparisons SBUV/2 – SCIAMACHY total ozone comparisons