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Impact of instrumental line shape characterization on ozone monitoring by FTIR spectrometry
Title: Impact of instrumental line shape characterization on ozone monitoring by FTIR spectrometry
Authors: García Rodríguez, Omaira Elena ORCID RESEARCHERID Autor AEMETSanromá, Esther ORCID RESEARCHERID Hase, FrankSchneider, Matthias RESEARCHERID León-Luis, Sergio FabiánAutor AEMETBlumenstock, ThomasSepúlveda Hernández, EliezerTorres, Carlos ORCID RESEARCHERID Autor AEMETPrats Porta, Natalia ORCID RESEARCHERID Autor AEMETRedondas, Alberto ORCID RESEARCHERID Autor AEMETCarreño Corbella, VirgilioAutor AEMET
Keywords: FTIR spectrometry; Ozone monitoring; Atmospheric trace gase
Issue Date: 2022
Publisher: European Geosciences Union; Copernicus Publications
Citation: Atmospheric Measurement Techniques. 2022, 15, 4547–4567
Publisher version:
Abstract: Retrieving high-precision concentrations of atmospheric trace gases from FTIR (Fourier transform infrared) spectrometry requires a precise knowledge of the instrumental performance. In this context, this paper examines the impact on the ozone (O3) retrievals of several approaches used to characterize the instrumental line shape (ILS) function of ground-based FTIR spectrometers within NDACC (Network for the Detection of Atmospheric Composition Change). The analysis has been carried out at the subtropical Izaña Observatory (IZO, Spain) by using the 20-year time series of the high-resolution FTIR solar absorption spectra acquired between 1999 and 2018. The theoretical quality assessment and the comparison to independent O3 observations available at IZO (Brewer O3 total columns and electrochemical concentration cell, ECC, sondes) reveal consistent findings. The inclusion of a simultaneous retrieval of the ILS parameters in the O3 retrieval strategy allows, on the one hand, a rough instrumental characterization to be obtained and, on the other hand, the precision of the FTIR O3 products to be slightly improved.
Sponsorship : The Izaña FTIR station has been supported by the German Bundesministerium für Wirtschaft und Energie (BMWi) via the DLR under grant no. 50EE1711A and by the Helmholtz Association via the research programme ATMO. In addition, this research was funded by the European Research Council under FP7/(2007–2013)/ERC grant agreement no. 256961 (project MUSICA), by the Deutsche Forschungsgemeinschaft for the project MOTIV (Geschäftszeichen SCHN 1126/2-1), the Ministerio de Economía y Competitividad of Spain through the projects CGL2012-37505 (project NOVIA) and CGL2016-80688-P (project INMENSE), and EUMETSAT under its fellowship programme (project VALIASI).
ISSN: 1867-1381
Appears in Collections:Artículos científicos 2019-2022

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