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AEROSOL AND OZONE TRANSPORT: EFFECTS OF FIRES, CONVECTION,
AND LIGHTNING
Ken PickeringUniversity of Maryland, College Park
Anne ThompsonNASA Goddard
Lenny PfisterNASA Ames
Rennie Selkirk – Ames
Tom Kucsera, Jacquie Witte - Goddard
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Trajectories and Trajectory-basedExposure/Influence Products
• Back trajectories (5 days) computed from a grid of points in flight area (kinematic and isentropic)
• Convective influence – trajectory is run until intersects deep convective cloud (based on GOES-IR imagery); location influenced, storm location and elapsed time displayed
• Lightning exposure – NLDN flashes accumulated along trajectories
• Aerosol exposure – TOMS Aerosol Index accumulated along trajectories
• Aircraft emission exposure• Stratospheric influence – PV reverse domain fill product
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See poster by Anne Thompson focusing on Ron Brown ozonesondes
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Alaska/Yukon Fire Influence Based on TOMS Aerosol Index
• July 6 - first noted in Central/Eastern Canada• July 9 and 11 – present on NOAA P-3 flights in
Gulf of Maine• July 15 – detected over Northern Michigan by
DC-8• July 18 – DC-8 entered major plume near
Newfoundland• July 20 – DC-8 encountered plume over AL,
and again in the Northeast• July 22 – Layers evident along Atlantic coast
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P-3
NOAA P-3 Encountered Smoke over Gulf of Maine
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x DC-8
NASA DC-8 and Pellston, MI Ozonesonde Note Fire Plume
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Browell et al.
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Fire plume?
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xDC-8
NASA DC-8 Encounters Large Plume NE of Newfoundland
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Browell et al.
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DC-8
DC-8
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xx x x x
x
x
Good correspondence of 5-day lightning influence and enhanced UT ozone
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Browell et al.
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SUMMARY
• Aerosol exposure based on TOMS AI has provided depictions of Alaskan/Yukon fire plume locations for flight planning
• Accumulation of lightning influence well correlated with enhanced UT ozone
• INTEX ozonesondes and associated trajectories aid in flight planning, diagnosis of effects of convective outflow, Asian pollution transport
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Possible Asian Influence on Mid- and Upper Tropospheric Ozone
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