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Ozone Layers Aloft
Bill Brick
&
Bill Reeve
San Diego County APCD
SCOS97-NARSTO DATA ANALYSIS CONFERENCE FEBRUARY 15, 2001
SCOS97-NARSTO LOGO
3-D OZONE PLOT: ARB
Art Collins
3-D OZONE PLOT: ARB
Art Collins
August 4-7, 1997
August 4 (Mon): Weak South Coast Air Basin ozone maximum
August 5 (Tue): Weak SCAB ozone maximum; weak upper level transport to San Diego
August 6 (Wed): Weak SCAB ozone maximum; secondary South Coast Air Basin ozone maximum with transport into Mojave Desert; eddy transport to Ventura following episode in the SCAB
0.000
0.020
0.040
0.060
0.080
0.100
0.120
0.140
0 3 6 9 12 15 18 21
SPM - BMTALPDMRFed. Std.State Std.
August 22-23, 1997
August 22 (Fri): Weak secondary SCAB ozone maximum with transport into Mojave
August 23 (Sat): Weak secondary SCAB ozone maximum with transport into Mojave
September 4-6, 1997
September 4 (Thu): Upper level transport to San Diego
September 5 (Fri): Weak secondary SCAB ozone maximum with transport into Mojave
September 6 (Sat): Eddy transport to Ventura following episode in the SCAB
0.000
0.020
0.040
0.060
0.080
0.100
0.120
0.140
0 3 6 9 12 15 18 21
SPM - BMTALPDMRFed. Std.State Std.
0.000
0.020
0.040
0.060
0.080
0.100
0.120
0.140
0 3 6 9 12 15 18 21
SPM - BMTALPDMRFed. Std.State Std.
September 27-29, 1997
September 27 (Sat): Weak upper level transport to San Diego; weak secondary SCAB ozone maximum with transport into Mojave
September 28 (Sun): Weak upper level transport to San Diego; weak secondary SCAB ozone maximum with transport into Mojave
September 29 (Mon): Eddy transport to Ventura following episode in the SCAB
October 3-4, 1997
October 3 (Fri): No episode
October 4 (Sat): Weak secondary SCAB ozone maximum with transport into Mojave Desert; eddy transport to Ventura following episode in the SCAB
Summary
• Measurements show ozone layers aloft.
• Ozone layers are persistent and wide-spread over the SCOS97 domain.
• Transported ozone layers have potential to impact downwind areas at surface.
Future Steps:
Want to identify source region and fate of ozone layers aloft.
• Expand current analysis and include additional platforms (UCD Cessna, US Navy aircraft, ozonesondes, lidar, surface monitoring sites).
• Trajectory analysis using profiler and modeled wind fields.
• Investigation of HC and NOy data collected by aircraft.
Acknowledgements:
Jerry Anderson, et al. (STI) for Navajo and Cessna data processing
ARB for project coordination, data archive (CD-ROM); Leon Dolislager for timely supply of supplemental aircraft data
SCAQMD and ARB for arranging and hosting thisConference
