The {open_quotes}ozone deficit{close_quotes} problem: A new channel in ozone photodissociation
- Cornell Univ., Ithaca, NY (United States); and others
Highly vibrationally excited O{sub 2}(X {sup 3}{Sigma}{sub g}-, v{>=}26) has been observed from the photodissociation of ozone (O{sub 3}) and the quantum yield for this reaction has been determined for excitation at 226 nm. This observation may help to address the {open_quotes}ozone deficit{close_quotes} problem, or why the previously predicted stratospheric O{sub 3} concentration is less than that observed. Recent kinetic studies have suggested that O{sub 2}(X {sup 3}{Sigma}{sub g}-, v{>=}26) can react rapidly with O{sub 2} to form O{sub 3} + O and have led to speculation that, if produced in the photodissociation of O{sub 3}, this species might be involved in resolving the discrepancy. The sequence O{sub 3} + hv {yields} O{sub 2}(X {sup 3}{Sigma}{sub g}-, v{>=}26) + O; O{sub 2}(X {sup 3}{Sigma}{sub g}-, v{>=}26) + O{sub 2} {yields} O{sub 3} + O would be an autocatalytic mechanism for production of odd oxygen. A two-dimensional atmospheric model has been used to evaluate the importance of this new mechanism. The new mechanism can completely account for the tropical ozone deficit at an altitude of 43 km, but it does not completely account for the deficit at higher altitudes.
- OSTI ID:
- 215112
- Report Number(s):
- CONF-950801-; TRN: 96:000922-0626
- Resource Relation:
- Conference: 210. national meeting of the American Chemical Society (ACS), Chicago, IL (United States), 20-25 Aug 1995; Other Information: PBD: 1995; Related Information: Is Part Of 210th ACS national meeting. Part 1 and 2; PB: 1866 p.
- Country of Publication:
- United States
- Language:
- English
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