Retrievals of formaldehyde from ground-based FTIR and MAX-DOAS observations at the Jungfraujoch station and comparisons with GEOS-Chem and IMAGES model simulations
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Authors
Franco, B.
Hendrick, F.
Van Roozendael, M.
Muller, J.-F.
Stavrakou, T.
Marais, E.A.
Bovy, B.
Bader, W.
Fayt, C.
Hermans, C.
Lejeune, B.
Pinardi, G.
Servais, C.
Mahieu, E.
Discipline
Earth and related Environmental sciences
Subject
aerosol formation
atmospheric chemistry
atmospheric transport
database
EOS
formaldehyde
FTIR spectroscopy
ground-based measurement
numerical model
photooxidation
remote sensing
troposphere
Alps
Bern [Switzerland]
Jungfraujoch
Switzerland
Audience
Scientific
Date
2015Metadata
Show full item recordDescription
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.
Citation
Franco, B.; Hendrick, F.; Van Roozendael, M.; Muller, J.-F.; Stavrakou, T.; Marais, E.A.; Bovy, B.; Bader, W.; Fayt, C.; Hermans, C.; Lejeune, B.; Pinardi, G.; Servais, C.; Mahieu, E. (2015). Retrievals of formaldehyde from ground-based FTIR and MAX-DOAS observations at the Jungfraujoch station and comparisons with GEOS-Chem and IMAGES model simulations. , Atmospheric Measurement Techniques, Vol. 8, Issue 4, 1733-1756, DOI: 10.5194/amt-8-1733-2015.Identifiers
scopus: 2-s2.0-84928492418
Type
Article
Peer-Review
Yes
Language
eng