Dalhousie University Dalhousie University Department of Physics and Atmospheric Department of Physics and Atmospheric Science Science • Materials Science • Biophysics • Condensed Matter Physics • Atmospheric Science earch in Theoretical, Experimental, and Applied Phy ://www.physics.dal.ca/files/Physics_and_Atmospheric_Science_Faculty
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Dalhousie University Department of Physics and Atmospheric Science Materials Science Biophysics Condensed Matter Physics Atmospheric Science Research in.
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Dalhousie UniversityDalhousie UniversityDepartment of Physics and Atmospheric ScienceDepartment of Physics and Atmospheric Science
• Materials Science
• Biophysics
• Condensed Matter Physics
• Atmospheric Science
Research in Theoretical, Experimental, and Applied Physics
Total NOTotal NO22 Slant Columns Observed from the SCIAMACHY Slant Columns Observed from the SCIAMACHY
Satellite InstrumentSatellite Instrument
May-August 2004
Perform a Radiative Transfer Calculation to Account for Viewing Perform a Radiative Transfer Calculation to Account for Viewing Geometry and ScatteringGeometry and Scattering
Cloud Screening: Remove Scenes with ICloud Screening: Remove Scenes with IB,c B,c > I> IB,oB,o
RcRo
IB,o IB,c
Pc
Rs
•LIDORT Radiative Transfer Model [Spurr et al., 2002]
•FRESCO Clouds Fields [Koelemeijer et al., 2002]
•GOME Surface Reflectivity [Koelemeijer et al., 2003]
d
Io
Tropospheric NOTropospheric NO22 Columns Observed from the SCIAMACHY Columns Observed from the SCIAMACHY
Satellite InstrumentSatellite Instrument
May-August 2004
detectionlimit
Major Urban Centers Are Concentrated NOx SourcesMajor Urban Centers Are Concentrated NOx Sources
May-August 2004
detectionlimit
Sillman and He, 2002
(ppbv)
NOx-Saturated
NOx-Limited
Shown that the HCHO/NO2 Ratio Is as IndicatorThat Can be Observed from Space
Ozone Control Strategies Require Independent Ozone Control Strategies Require Independent Information on Effectiveness of Reducing NOx or VOCsInformation on Effectiveness of Reducing NOx or VOCs
GOME Observations Show NOGOME Observations Show NOxx-Sensitive Conditions -Sensitive Conditions
Over Most Polluted Regions During AugustOver Most Polluted Regions During AugustMajor Industrial Areas are Clear ExceptionsMajor Industrial Areas are Clear Exceptions
August
White areas indicate clouds or data below the GOME detection limit
Biomass Burning Emissions are Clearly NOBiomass Burning Emissions are Clearly NOxx-Sensitive, -Sensitive,
In Contrast with NOIn Contrast with NOxx-Saturated Conditions Over the -Saturated Conditions Over the
Industrial Highveld Industrial Highveld
August
Also observe plume evolution
NO
x L
im
NO
x L
im
Seasonal Seasonal Evolution from Evolution from
NOx-Sensitive to NOx-Sensitive to NOx-Saturated NOx-Saturated