OMI Validation Status Mark Kroon - KNMI (on behalf of the OMI validation team) OMI Science Team...
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Transcript of OMI Validation Status Mark Kroon - KNMI (on behalf of the OMI validation team) OMI Science Team...
OMI Validation Status
Mark Kroon - KNMI(on behalf of the OMI
validation team)
OMI Science Team MeetingHelsinki, 23 June 2008
Dr. Mark Kroon – KNMI - OSTM13 – Finland Slide 2
JGR Aura Validation Issue
Topic #Level 1B 3
Aerosols 3
Clouds 3
Nitrogen Dioxide 7
Ozone 11
Sulphur Dioxide 2
Surface-UV 1
VF Delivery 1
Total 31
31 out of 67 papers related to OMI (on both validation and science)!
High quality peerreview and webpublished papers!
10 papers from OMI AO!Balis, Brinksma, Curier, Ionov, Kramer, Krzyścin, Migliorini, Shavrina, Sneep, Tanskanen.
Dr. Mark Kroon – KNMI - OSTM13 – Finland Slide 3
JGR Aura Validation Issue
Dr. Mark Kroon – KNMI - OSTM13 – Finland Slide 4
Validation Status COL3
Data Product Released Status
Level 1B Public
Total Column Ozone (TOMS) Public
Total Column Ozone (DOAS) Public
Aerosol (NASA – AI AOT AAOT) Public
Aerosol (KNMI – AOD SSA) Public
Nitrogen Dioxide Total Column Public
Nitrogen Dioxide tropospheric column Public
Cloud Height and Fraction O2-O2 Public
Cloud Height and Fraction Raman Public
Surface-UV Public
Sulphur Dioxide (STL TRM PBL) Public
Formaldehyde Public
Bromine Oxide Public
Chlorine Dioxide Public
Ozone Profile Provisional
Validated and Good for Science
Validated and Some Problems
Validated butUse with Caution
Validation Preliminary
Not Publicly Available
Dr. Mark Kroon – KNMI - OSTM13 – Finland Slide 5
Total Ozone Column OMTO3
Image(s) Courtesy : Dr . Dimitris Balis – Aristotle University of Thessaloniki – OMI AO 2925
Dr. Mark Kroon – KNMI - OSTM13 – Finland Slide 6
Total Ozone Column OMDOAO3
Image(s) Courtesy : Dr . Dimitris Balis – Aristotle University of Thessaloniki – OMI AO 2925
Dr. Mark Kroon – KNMI - OSTM13 – Finland Slide 7
Brewer Dobson
<O-G>/G (O-G) <O-G>/G (O-G)
OMI DOAS 0.483 % 2.754 % 0.070 % 1.653 %
OMI DOAS* -0.555 % 0.200 % 0.086 % 1.601 %
OMI TOMS -0.504 % 2.704 % -0.631 % 1.032 %
OMI TOMS* -1.450 % 0.425 % -0.645 % 1.064 %
* No South Pole (lat > 75 S)
Ground Based Validation
Data Courtesy : Dr . Dimitris Balis – Aristotle University of Thessaloniki – OMI AO 2925
Dr. Mark Kroon – KNMI - OSTM13 – Finland Slide 8
Total Ozone Column
Total O3 Column Difference for October 2005
OM
I TO
MS V
8.5
- D
OA
S v
1.0
.5 [
DU
]
Dr. Mark Kroon – KNMI - OSTM13 – Finland Slide 9
OMI – MLS Ozone Profiles
Preliminary results forOMI vs MLS ozone profiles
Distance < 100 kmSame orbit
Dr. Mark Kroon – KNMI - OSTM13 – Finland Slide 10
OMI – MLS Ozone Profiles
Preliminary results for OMI vs MLS ozone profilesDistance < 100 km and Same orbit
Dr. Mark Kroon – KNMI - OSTM13 – Finland Slide 11
OMI – GOMOS Ozone Profiles
Image(s) Courtesy : Dr . Johanna Tamminen - FMI
Dr. Mark Kroon – KNMI - OSTM13 – Finland Slide 12
Nitrogen Dioxide Total Column
Image Courtesy : Dr. Dmitry Ionov – CNRS – OMI AO 2926
SA
OZ
(EC
S2 v
s. C
OL3
) fo
r O
MI 2004-2
007
Dr. Mark Kroon – KNMI - OSTM13 – Finland Slide 13
Nitrogen Dioxide Tropospheric Column
Image Courtesy : Dr. Jennifer Hains – KNMI
+ OMI pixel < 650 km2
+ OMI pixel > 650 km2
+ SCIAMACHY
Dr. Mark Kroon – KNMI - OSTM13 – Finland Slide 14
Aerosols Optical Depth
Images Courtesy : Dr. Omar Torres – Hampton
Collection 2 Collection 3
Omar Torres: “Collection 3 data shows significant improvement in the accuracy of retrieved AOD relative to collection 2 results. Noise
level significantly reduced in monthly averages.”
Dr. Mark Kroon – KNMI - OSTM13 – Finland Slide 15
Aerosols Optical Depth
Images Courtesy : Dr. Remco Braak – KNMI
OMI data is land only and ‘MODIS cloud fraction screened’ 'Q12' means using monthly mean surface reflectivity data [Quintus Kleipool (KNMI)].
'Q12'
Dr. Mark Kroon – KNMI - OSTM13 – Finland Slide 16
Sulphur Dioxide Total Column
Mark K: Would you consider the OMSO2 data product to be of category 1 (validated), 2 (some issues) or 3 (caution)?
Nick K: Volcanic SO2 data (TRL 2.5, TRM 7.5 and STL 17 ) retrieved with linear fit algorithm are in category 2!
Add 1: Products are accurate for small to moderate volcanic SO2 plumes ( < 50 DU). Main problem is guessing SO2 altitude.
Add 2: Current volcanic data will underestimate SO2 for large eruptions (> 100 DU).
Add 3: Boundary layer SO2 (PBL) is in category 3, mostly because of high noise (StDev ~1.5DU for optimal conditions) that is comparable or larger than real anthropogenic signals.
Images Courtesy : Dr. Nick krotkov – GSFC
Dr. Mark Kroon – KNMI - OSTM13 – Finland Slide 17
Bromine Oxide
Images Courtesy : Dr. Thomas Kurosu – Harvard-Smithsonian Center for Astrophysics
Dr. Mark Kroon – KNMI - OSTM13 – Finland Slide 18
Formaldehyde
Images Courtesy : Dr. Thomas Kurosu – Harvard-Smithsonian Center for Astrophysics
Dr. Mark Kroon – KNMI - OSTM13 – Finland Slide 19
Chlorine Dioxide
Images Courtesy : Dr. Thomas Kurosu – Harvard-Smithsonian Center for Astrophysics
Thomas Kurosu - Harvard-Smithsonian Center for Astrophysics
“There is a huge difference between those three products between ECS2 and COL3: COL3 versions are much improved over ECS2. In fact, use of ECS2 data is STRONGLY discouraged ...”
“The Col 3 versions are much improved in across-track striping (meaning there is less of it), to the point that we currently discourage the use of the "destriped columns" …
Dr. Mark Kroon – KNMI - OSTM13 – Finland Slide 20
Validation @ This Meeting