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| Titel |
Bromine Chemistry in the Tropical UTLS during the 2011, 2013 and 2014 ATTREX Experiments |
| VerfasserIn |
Bodo Werner, Jochen Stutz, Max Spolaor, James Festa, Catalina Tsai, Fedele Colosimo, Ross Cheung, Tim Deutschmann, Rasmus Raecke, Lisa Scalone, Ugo Tricoli, Klaus Pfeilsticker, Maria Navarro, Elliot Atlas, Martyn Chipperfield, Ryan Hossaini |
| Konferenz |
EGU General Assembly 2015
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 17 (2015) |
| Datensatznummer |
250104357
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| Publikation (Nr.) |
 EGU/EGU2015-3779.pdf |
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| Zusammenfassung |
| Bromine plays an important role for the chemistry of ozone in the stratosphere and upper
troposphere. An accurate quantitative understanding of the sources, sinks, and chemical
transformation of bromine species is thus important to understand the bromine budget in the
upper troposphere and lower stratosphere (UTLS), which also serves as a gate to the
stratosphere. Vertical transport of very short-lived organic bromine precursors and inorganic
product gases has been identified as the main source of bromine in the UTLS. However, the
contribution of inorganic vs. organic compounds is not well quantified, particularly in the
tropical UTLS.
A limb scanning Differential Optical Absorption Spectroscopy instrument was deployed
onboard NASA’s UAV Global Hawk during the NASA Airborne Tropical TRopopause
EXperiment (ATTREX) during a series of flights into the eastern and western Pacific
tropopause layer (flight altitudes up to 18 km), which is a gateway to the stratosphere. The
measurement methodology to retrieve vertical trace gas concentration profiles will be briefly
presented. Observations of BrO, NO2 and O3 and of other trace species, in particular of
brominated hydrocarbons are compared with simulations of the SLIMCAT CTM and
interpreted with respect to photochemistry and the budget of bromine within the tropical
tropopause layer (TTL). |
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