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          Institute: MPI für Chemie     Collection: Publikationen MPI für Chemie     Display Documents

ID: 18288.0, MPI für Chemie / Publikationen MPI für Chemie
Electrical discharge source for tropospheric "ozone-rich transients"
Authors:Zahn, A.; Brenninkmeijer, C. A. M.; Crutzen, P. J.; Parrish, D. D.; Sueper, D.; Heinrich, G.; Güsten, H.; Fischer, H.; Hermann, M.; Heintzenberg, J.
Date of Publication (YYYY-MM-DD):2002-11
Title of Journal:Journal of Geophysical Research
Journal Abbrev.:J. Geophys. Res.
Issue / Number:D22
Sequence Number of Article:4638
Review Status:Peer-review
Audience:Experts Only
Abstract / Description:[1] In situ trace gas (O-3, NO, NO2,NOy) and ultrafine aerosol particle data from a passenger aircraft (project CARIBIC) and the NOAA WP-3D research aircraft are used to identify the origin of "ozone-rich transients'' that occasionally appear in aircraft ozone data sets along flight distances of 5-80 km. Evidence of ozone import from the stratosphere, once suggested as the most likely cause, cannot be found. Our data rather reveal that the majority of the recorded ozone transients are artifacts caused by electrical discharges on the aircraft fuselage and the sample air inlet system. These discharges produce not solely O-3 but also nitric oxide (NO) which rapidly reacts with O-3 to form nitrogen dioxide (NO2). Further evidence is, however, provided showing that some of the less pronounced and broader O-3-NO-NO2-rich transients are of atmospheric origin. We hypothesize that they are formed in an early (i.e., prelightning) phase of thunderstorms due to cold electrical discharges on the surface of charged hydrometeors. Simple considerations suggest that the amount of O-3 and NO produced through these mechanisms is negligible with regard to the global tropospheric budget for the two gases.
Free Keywords:tropospheric ozone budget; electricity induced trace gas production; stratosphere-to-troposphere ozone
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Chemie/Chemie der Atmosphäre
External Affiliations:Univ Karlsruhe, Forschungszentrum Karlsruhe, Inst Meteorol & Climate Res, POB 3640, D-76021 Karlsruhe, Germany; NOAA, Aeron Lab, Boulder, CO USA; Inst Troposher Res, D-04303 Leipzig, Germany
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