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| Titel |
Observations of O3, NO2 and BrO and in the tropical UT/LS during the 2013/2014 NASA ATTREX experiment |
| VerfasserIn |
Bodo Werner, Jochen Stutz, Max Spolaor, Catalina Tsai, Fedele Colosimo, Ross Cheung, Tim Deutschmann, Rasmus Raecke, Ugo Tricoli, Lisa Scalone, Klaus Pfeilsticker |
| Konferenz |
EGU General Assembly 2014
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 16 (2014) |
| Datensatznummer |
250095752
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| Publikation (Nr.) |
 EGU/EGU2014-11222.pdf |
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| Zusammenfassung |
| Reactive bromine plays an important role for the chemistry of ozone in the stratosphere and
likely also in the upper troposphere. It is thus crucial to understand the sources and sinks of
inorganic bromine species as well as their transport and that of their organic precursors into
the stratosphere. Much progress has been made in recent years in understanding the budget of
inorganic bromine through field observations of very short-lived organic bromine precursors,
such as CHBr3 und CH2Br2 and inorganic product gases at stratospheric entry level.
Nevertheless a number of processes influencing bromine chemistry require better
quantification, including the transport of organic and inorganic bromine through the tropical
TTL region and the interaction of inorganic bromine species with ice particles in cirrus
clouds.
Here we report on BrO, NO2, and O3 profile measurements performed within the TTL
from aboard the NASA’s unmanned high-altitude Global Hawk aircraft during the Airborne
Tropical TRopopause EXperiment (ATTREX) deployments in 2011 - 2014. The technique
involves limb scanning of UV/vis skylight spectra, spectral retrieval via Differential Optical
Absorption Spectroscopy (DOAS), forward modelling of the radiative transfer for each
observation and a non-linear optimal estimation of the targeted atmospheric parameters.
Key features of the technique are reported and first retrieval results are discussed. |
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