An investigation into the source of the springtime tropospheric ozone maximum at Mauna Loa Observatory

Details An investigation into the source of the springtime tropospheric ozone maximum at Mauna Loa Observatory An investigation into the source of the springtime tropospheric ozone maximum at Mauna Loa Observatory

Jun 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998georl..25.1895h&link_type=abstract

Geophysical Research Letters, Volume 25, Issue 11, p. 1895-1898

Physics

16

Atmospheric Composition And Structure: Troposphere-Constituent Transport And Chemistry, Atmospheric Composition And Structure: Chemical Kinetic And Photochemical Properties, Atmospheric Composition And Structure: Constituent Sources And Sinks, Information Related To Geographic Region: Pacific Ocean

Scientific paper

Measurements of CH4, CO, O3, and H2O vapor from Mauna Loa Observatory (MLO) are examined in conjunction with isentropic trajectories to investigate the cause of a maximum in tropospheric O3 consistently observed during spring. CO and O3 have been found to be positively correlated in pollution plumes containing O3 precursors downwind of industrialized regions. However, we report that during continental transport from Asia, O3 is not correlated with either CO or CH4, although CO and CH4 are strongly correlated. The relationship between CO and CH4 suggests common source regions. The lack of correlation between these species and O3 probably indicates an O3 source distinct from that of CO and CH4. While Asian pollution does not appear to be a strong candidate for causing the spring increase in O3, transport characteristics and H2O vapor measurements are consistent with both an upper-tropospheric/stratospheric contribution and an enhancement from transport across O3 gradients.

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