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| Titel |
The influence of deep convection on HCHO, H2O2 and organic peroxides in the upper troposphere over Europe |
| VerfasserIn |
H. Bozem |
| Konferenz |
EGU General Assembly 2009
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 11 (2009) |
| Datensatznummer |
250023114
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| Zusammenfassung |
| Deep convection is a highly efficient mechanism of vertical transport from the Earth’s surface
to the upper troposphere (UT). In convective clouds the rapid uplift of different trace gases
with surface sources results in a C-shaped vertical profile and generally longer
chemical lifetimes in the UT region affecting photochemical processes, e.g. ozone
production. Formaldehyde (HCHO), hydrogen peroxide (H2O2) and organic peroxides,
which are all important HOx precursors, are highly soluble trace gases. They can be
efficiently scavenged and subsequently removed by precipitation in deep convective
clouds.
The analysis of a case study of deep convection over Germany in summer 2007 within the
framework of the HOOVER II project is presented. Airborne in situ measurements in the
outflow and near the assumed inflow region of an isolated convective cell provide an excellent
data set to study the influence of deep convection on the mixing ratios of many different
species in the UT region. A comparison of outflow and boundary layer mixing ratios
indicate an almost undiluted transport of the longer lived species (CO, CH4) to the UT
with [Outflow]/[BL] ratios of 0.94 |
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