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| Titel |
Retrievals of formaldehyde from ground-based FTIR and MAX-DOAS observations at the Jungfraujoch station and comparisons with GEOS-Chem and IMAGES model simulations |
| VerfasserIn |
B. Franco, F. Hendrick, M. Van Roozendael, J.-F. Müller, T. Stavrakou, E. A. Marais, B. Bovy, W. Bader, C. Fayt, C. Hermans, B. Lejeune, G. Pinardi, C. Servais, E. Mahieu |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1867-1381
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Measurement Techniques ; 8, no. 4 ; Nr. 8, no. 4 (2015-04-15), S.1733-1756 |
| Datensatznummer |
250116297
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| Publikation (Nr.) |
 copernicus.org/amt-8-1733-2015.pdf |
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| Zusammenfassung |
| As an ubiquitous product of the oxidation of many volatile organic
compounds (VOCs), formaldehyde (HCHO) plays a key role as a
short-lived and reactive intermediate in the atmospheric
photo-oxidation pathways leading to the formation of tropospheric
ozone and secondary organic aerosols. In this study, HCHO profiles
have been successfully retrieved from ground-based Fourier transform
infrared (FTIR) solar spectra and UV-visible Multi-AXis Differential
Optical Absorption Spectroscopy (MAX-DOAS) scans recorded during the
July 2010–December 2012 time period at the Jungfraujoch station
(Swiss Alps, 46.5° N, 8.0° E, 3580 m a.s.l.).
Analysis of the retrieved products has revealed different vertical
sensitivity between both remote sensing techniques. Furthermore,
HCHO amounts simulated by two state-of-the-art chemical transport
models (CTMs), GEOS-Chem and IMAGES v2, have been compared to FTIR
total columns and MAX-DOAS 3.6–8 km partial columns, accounting
for the respective vertical resolution of each ground-based
instrument. Using the CTM outputs as the intermediate, FTIR and MAX-DOAS
retrievals have shown consistent seasonal modulations of HCHO
throughout the investigated period, characterized by summertime
maximum and wintertime minimum. Such comparisons have also
highlighted that FTIR and MAX-DOAS provide complementary products
for the HCHO retrieval above the Jungfraujoch station. Finally,
tests have revealed that the updated IR parameters from the HITRAN
2012 database have a cumulative effect and significantly decrease
the retrieved HCHO columns with respect to the use of the HITRAN
2008 compilation. |
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