Reference : Acetylene (C2H2) and hydrogen cyanide (HCN) from IASI satellite observations: global ...
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Earth sciences & physical geography
http://hdl.handle.net/2268/181787
Acetylene (C2H2) and hydrogen cyanide (HCN) from IASI satellite observations: global distributions, validation, and comparison with model
English
Duflot, V. [> >]
Wespes, C. [> >]
Clarisse, L. [> >]
Hurtmans, D. [> >]
Ngadi, Y. [> >]
Jones, N. [> >]
Paton-Walsh, C. [> >]
Hadji-Lazaro, J. [> >]
Vigouroux, C. [> >]
De Mazière, M. [> >]
Metzger, J.-M. [> >]
Mahieu, Emmanuel mailto [Université de Liège > Département d'astrophys., géophysique et océanographie (AGO) > Groupe infra-rouge de phys. atmosph. et solaire (GIRPAS) >]
Servais, Christian [Université de Liège > Département d'astrophys., géophysique et océanographie (AGO) > Groupe infra-rouge de phys. atmosph. et solaire (GIRPAS) >]
Hase, F. [> >]
Schneider, M. []
Clerbaux, C. [> >]
Coheur, P.-F. [> >]
24-Sep-2015
Atmospheric Chemistry and Physics
Copernicus Publications
15
10509--10527
Yes (verified by ORBi)
International
1680-7316
1680-7324
Katlenburg-Lindau
Germany
[en] atmospheric composition ; remote sensing ; acetylene ; hydrogen cyanide
[en] We present global distributions of C2H2 and hydrogen
cyanide (HCN) total columns derived from the Infrared
Atmospheric Sounding Interferometer (IASI) for the
years 2008–2010. These distributions are obtained with a fast
method allowing to retrieve C2H2 abundance globally with
a 5% precision and HCN abundance in the tropical (subtropical)
belt with a 10% (25 %) precision. IASI data are
compared for validation purposes with ground-based Fourier
transform infrared (FTIR) spectrometer measurements at
four selected stations. We show that there is an overall agreement
between the ground-based and space measurements
with correlation coefficients for daily mean measurements
ranging from 0.28 to 0.81, depending on the site. Global
C2H2 and subtropical HCN abundances retrieved from IASI
spectra show the expected seasonality linked to variations in
the anthropogenic emissions and seasonal biomass burning
activity, as well as exceptional events, and are in good agreement
with previous spaceborne studies. Total columns simulated
by the Model for Ozone and Related Chemical Tracers,
version 4 (MOZART-4) are compared to the ground-based
FTIR measurements at the four selected stations. The model
is able to capture the seasonality in the two species in most of
the cases, with correlation coefficients for daily mean measurements
ranging from 0.50 to 0.86, depending on the site.
IASI measurements are also compared to the distributions
from MOZART-4. Seasonal cycles observed from satellite
data are reasonably well reproduced by the model with correlation
coefficients ranging from -0.31 to 0.93 for C2H2
daily means, and from 0.09 to 0.86 for HCN daily means,
depending on the considered region. However, the anthropogenic
(biomass burning) emissions used in the model seem
to be overestimated (underestimated), and a negative global
mean bias of 1% (16 %) of the model relative to the satellite
observations was found for C2H2 (HCN).
Researchers ; Professionals
http://hdl.handle.net/2268/181787
10.5194/acp-15-10509-2015
http://www.atmos-chem-phys.net/15/10509/2015/

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