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| Titel |
Impact of congestus clouds on the midlevel ozone concentrations |
| VerfasserIn |
Toni Mitovski, Ian Folkins, Randall Martin, Matthew Cooper |
| Konferenz |
EGU General Assembly 2011
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 13 (2011) |
| Datensatznummer |
250046072
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| Zusammenfassung |
| We used simultaneous measurements from the TRMM 3B42 dataset and the SHADOZ ozonesonde network to identify high precipitation events and to construct height-time ozone anomaly patterns about Fiji and Samoa. The results clearly show an evidence of decreased (-10 ppbv) ozone concentrations in the middle troposphere (~ 6 km) preceding rainfall. Soundings from the IGRA dataset were used to calculate height-time divergence and RH anomaly patterns about high precipitation events. The results show that a mid-level divergence, likely due to congestus detrainment, is coincident with the mid-level ozone anomaly. An increased RH in the lower and middle troposphere, preceding peak rainfall, confirms presence of congestus clouds. The mid-level ozone and divergence anomaly features that precede rainfall are not seen in the GEOS-Chem model. The height, timing, and amplitude, of the mid-level congestus divergence, are not fully represented in the YOTC. |
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