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Photochemical production of O 3 in biomass burning plumes in the boundary layer over northern Australia
Author(s) -
Takegawa N.,
Kondo Y.,
Ko M.,
Koike M.,
Kita K.,
Blake D. R.,
Hu W.,
Scott C.,
Kawakami S.,
Miyazaki Y.,
RussellSmith J.,
Ogawa T.
Publication year - 2003
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2003gl017017
Subject(s) - biomass burning , atmospheric sciences , ozone , environmental science , amazon rainforest , boundary layer , biomass (ecology) , carbon monoxide , planetary boundary layer , atmosphere (unit) , lightning (connector) , mixing ratio , climatology , meteorology , oceanography , aerosol , geology , chemistry , geography , turbulence , catalysis , biology , physics , thermodynamics , ecology , biochemistry , power (physics) , quantum mechanics
In situ aircraft measurements of ozone (O 3 ) and its precursors were made over northern Australia in August–September 1999 during the Biomass Burning and Lightning Experiment Phase B (BIBLE‐B). A clear positive correlation of O 3 with carbon monoxide (CO) was found in biomass burning plumes in the boundary layer (<3 km). The ΔO 3 /ΔCO ratio (linear regression slope of O 3 ‐CO correlation) is found to be 0.12 ppbv/ppbv, which is comparable to the ratio of 0.15 ppbv/ppbv observed at 0–4 km over the Amazon and Africa in previous studies. The net flux of O 3 exported from northern Australia during BIBLE‐B is estimated to be 0.3 Gmol O 3 /day. In the biomass burning region, large enhancements of O 3 were coincident with the locations of biomass burning hot spots, suggesting that major O 3 production occurred near fires (horizontal scale <50 km).