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First Global Tropospheric Maps Show Streams of Tropospheric Ozone Crossing the Oceans

Aura's Ozone Monitoring Instrument (OMI) & Microwave Limb Sounder (MLS) can estimate the tropospheric ozone residual by subtracting the MLS stratospheric ozone from OMI column ozone. High residual regions correspond to pollution sources and transport.

Tropospheric ozone residual (TOR) is computed by subtracting the stratospheric column ozone from the total column ozone. The stratospheric column ozone is computed using the MLS limb measurements of ozone. The total column O3 is measured by OMI, and the TOR is the difference between them.

The monthly mean maps of the Tropospheric ozone residual (TOR) show pollution streaming from the U.S., Europe and China to the west in summer and pollution from biomass burning in the equatorial zone.
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OMI

Aura’s Ozone Monitoring Instrument (OMI) instrument can distinguish between aerosol types, such as smoke, dust, and sulfates, and measures cloud pressure and coverage, which provides data to derive tropospheric ozone.…

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