Tropospheric BrO VCD

Tropospheric BrO VCDs are calculated from OMI and GOME-2 total BrO columns, respectively. Total BrO VCD plots can be found at Thomas Kurosu's webpage . The detail introduction of GA Tech forecast system can be viewed at this PowerPoint movie or PDF. OMI BrO is a product of OMI instrument onboard the NASA Aura satellite. It is processed by Thomas Kurusu and Kelly Chance at Harvard-Smithsonia Center for Astrophysics (CFA). GOME-2 BrO is a product of GOME-2 instrument onboard the European Space Agency (ESA) EUMETSAT. It is processed by Trevor Beck at NOAA.

Click the above picture for archived images.

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Note: T/P/Wind is at 'hpa' level. O3 and BrOx are at 'meter' level.

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Three products are provided.
(1) Processed tropospheric column BrO from OMI and GOME-2. Extreme high BrO VCD above 85N is due to air mass factor (AMF) correction.
(2) 5-day meteorological forecast of T/P/Wind using the polar version of MM5 (output at surface, 800, 500, and 300 hPa).
(3) 5-day forecasts of boundary layer ozone and pseudo BrOx tracers (output at surface, 300, 500, and 800 m).
  • BrOx2 is a pseudo BrOx tracer with chemical lifetime of 2 days.
  • BrOx5 is a pseudo BrOx tracer with chemical lifetime of 5 days.

  • More information on the model used can be found in the papers by Zeng et al. [2003, 2006].

    Hourly BrO columns at Barrow, Alaska

    Barrow BrO columns from OMI and GOME-2 from each satellite track are shown bellow and can be found here. Tropospheric BrO columns are calculated for GOME-2 BrO only, which has been used in our surface ozone forecast.

    By considering the pixel size of each satellite, I used 40 and 20 km for GOME-2 and OMI to define a circle centering at Barrow to find the pixels in each satellite track. Then I did averaging for those pixels in each track. The time is accurate up to hour.

    Back to Dr. Yuhang Wang's group webpage at Georgia Tech