The influence of deep convection on HCHO and H2O2 in the upper troposphere over Europe
- Publikationstyp:
- Zeitschriftenaufsatz
- Metadaten:
-
- Autoren
- Heiko Bozem
- Andrea Pozzer
- Hartwig Harder
- Monica Martinez
- Jonathan Williams
- Jos Lelieveld
- Horst Fischer
- Autoren-URL
- https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=fis-test-1&SrcAuth=WosAPI&KeyUT=WOS:000412470000001&DestLinkType=FullRecord&DestApp=WOS_CPL
- DOI
- 10.5194/acp-17-11835-2017
- eISSN
- 1680-7324
- Externe Identifier
- Clarivate Analytics Document Solution ID: FJ1IV
- ISSN
- 1680-7316
- Ausgabe der Veröffentlichung
- 19
- Zeitschrift
- ATMOSPHERIC CHEMISTRY AND PHYSICS
- Paginierung
- 11835 - 11848
- Datum der Veröffentlichung
- 2017
- Status
- Published
- Titel
- The influence of deep convection on HCHO and H<sub>2</sub>O<sub>2</sub> in the upper troposphere over Europe
- Sub types
- Article
- Ausgabe der Zeitschrift
- 17
Datenquelle: Web of Science (Lite)
- Andere Metadatenquellen:
-
- Abstract
- <jats:p>Abstract. Deep convection is an efficient mechanism for vertical trace gas transport from Earth's surface to the upper troposphere (UT). The convective redistribution of short-lived trace gases emitted at the surface typically results in a C-shaped profile. This redistribution mechanism can impact photochemical processes, e.g. ozone and radical production in the UT on a large scale due to the generally longer lifetimes of species like formaldehyde (HCHO) and hydrogen peroxide (H2O2), which are important HOx precursors (HOx = OH + HO2 radicals). Due to the solubility of HCHO and H2O2 their transport may be suppressed as they are efficiently removed by wet deposition. Here we present a case study of deep convection over Germany in the summer of 2007 within the framework of the HOOVER II project. Airborne in situ measurements within the in- and outflow regions of an isolated thunderstorm provide a unique data set to study the influence of deep convection on the transport efficiency of soluble and insoluble trace gases. Comparing the in- and outflow indicates an almost undiluted transport of insoluble trace gases from the boundary layer to the UT. The ratios of out : inflow of CO and CH4 are 0.94 ± 0.04 and 0.99 ± 0.01, respectively. For the soluble species HCHO and H2O2 these ratios are 0.55 ± 0.09 and 0.61 ± 0.08, respectively, indicating partial scavenging and washout. Chemical box model simulations show that post-convection secondary formation of HCHO and H2O2 cannot explain their enhancement in the UT. A plausible explanation, in particular for the enhancement of the highly soluble H2O2, is degassing from cloud droplets during freezing, which reduces the retention coefficient. </jats:p>
- Autoren
- Heiko Bozem
- Andrea Pozzer
- Hartwig Harder
- Monica Martinez
- Jonathan Williams
- Jos Lelieveld
- Horst Fischer
- DOI
- 10.5194/acp-17-11835-2017
- eISSN
- 1680-7324
- Ausgabe der Veröffentlichung
- 19
- Zeitschrift
- Atmospheric Chemistry and Physics
- Sprache
- en
- Online publication date
- 2017
- Paginierung
- 11835 - 11848
- Status
- Published online
- Herausgeber
- Copernicus GmbH
- Herausgeber URL
- http://dx.doi.org/10.5194/acp-17-11835-2017
- Datum der Datenerfassung
- 2020
- Titel
- The influence of deep convection on HCHO and H&lt;sub&gt;2&lt;/sub&gt;O&lt;sub&gt;2&lt;/sub&gt; in the upper troposphere over Europe
- Ausgabe der Zeitschrift
- 17
Datenquelle: Crossref
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