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NDACC harmonized formaldehyde time-series from 21 FTIR stations covering a wide range of column abundances
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dc.contributor.authorVigouroux, Corinnees_ES
dc.contributor.authorBauer, Carlos Augustoes_ES
dc.contributor.authorBauwens, Maïtées_ES
dc.contributor.authorBecker, Cornelises_ES
dc.contributor.authorBlumenstock, Thomases_ES
dc.contributor.authorMazière, Martine dees_ES
dc.contributor.authorGarcía Rodríguez, Omaira Elenaes_ES
dc.contributor.authorGrutter, Micheles_ES
dc.contributor.authorGuarin, Césares_ES
dc.contributor.authorHannigan, Jameses_ES
dc.contributor.authorHase, Frankes_ES
dc.contributor.authorJones, Nicholases_ES
dc.contributor.authorKivi, Rigeles_ES
dc.contributor.authorKoshelev, Dmitryes_ES
dc.contributor.authorLangerock, Bavoes_ES
dc.contributor.authorLutsch, Erikes_ES
dc.contributor.authorMakarova, Mariaes_ES
dc.contributor.authorMetzger, Jean-Marces_ES
dc.contributor.authorMüller, Jean-Françoises_ES
dc.contributor.authorNotholt, Justuses_ES
dc.contributor.authorOrtega, Ivanes_ES
dc.contributor.authorPalm, Mathiases_ES
dc.contributor.authorPaton-Walsh, Clarees_ES
dc.contributor.authorPoberovskii, Anatolyes_ES
dc.contributor.authorRettinger, Markuses_ES
dc.contributor.authorRobinson, Johnes_ES
dc.contributor.authorSmale, Danes_ES
dc.contributor.authorStavrakou, Trissevgenies_ES
dc.contributor.authorStremme, Wolfganges_ES
dc.contributor.authorStrong, Kimberlyes_ES
dc.contributor.authorSussmann, Ralfes_ES
dc.contributor.authorTe, Yaoes_ES
dc.contributor.authorToon, Geoffrey C.es_ES
dc.identifier.citationAtmospheric Measurement Techniques. 2018, 11(9), p. 5049–5073es_ES
dc.description.abstractAmong the more than 20 ground-based FTIR (Fourier transform infrared) stations currently operating around the globe, only a few have provided formaldehyde (HCHO) total column time series until now. Although several independent studies have shown that the FTIR measurements can provide formaldehyde total columns with good precision, the spatial coverage has not been optimal for providing good diagnostics for satellite or model validation. Furthermore, these past studies used different retrieval settings, and biases as large as 50 % can be observed in the HCHO total columns depending on these retrieval choices, which is also a weakness for validation studies combining data from different ground-based stations. For the present work, the HCHO retrieval settings have been optimized based on experience gained from past studies and have been applied consistently at the 21 participating stations. Most of them are either part of the Network for the Detection of Atmospheric Composition Change (NDACC) or under consideration for membership. We provide the harmonized settings and a characterization of the HCHO FTIR products. Depending on the station, the total systematic and random uncertainties of an individual HCHO total column measurement lie between 12 % and 27 % and between 1 and 11×1014 molec cm−2, respectively. The median values among all stations are 13 % and 2.9×1014 molec cm−2 for the total systematic and random uncertainties. This unprecedented harmonized formaldehyde data set from 21 ground-based FTIR stations is presented and its comparison with a global chemistry transport model shows consistency in absolute values as well as in seasonal cycles. The network covers very different concentration levels of formaldehyde, from very clean levels at the limit of detection (few 1013 molec cm−2) to highly polluted levels (7×1016 molec cm−2). Because the measurements can be made at any time during daylight, the diurnal cycle can be observed and is found to be significant at many stations. These HCHO time series, some of them starting in the 1990s, are crucial for past and present satellite validation and will be extended in the coming years for the next generation of satellite missions.es_ES
dc.description.sponsorshipThis study has been supported by the ESA PRODEX project TROVA (2016–2018) funded by the Belgian Science Policy Office (Belspo).es_ES
dc.publisherEuropean Geosciences Uniones_ES
dc.rightsLicencia CC: Reconocimiento CC BYes_ES
dc.subjectFormaldehyde time-serieses_ES
dc.subjectFourier transform infraredes_ES
dc.titleNDACC harmonized formaldehyde time-series from 21 FTIR stations covering a wide range of column abundanceses_ES
Appears in Collections:Artículos científicos 2015-2018

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