TROPOMI–Sentinel-5 Precursor formaldehyde validation using an extensive network of ground-based Fourier-transform infrared stations

TROPOMI (the TROPOspheric Monitoring Instrument), on board the Sentinel-5 Precursor (S5P) satellite, has been monitoring the Earth's atmosphere since October 2017 with an unprecedented horizontal resolution (initially 7 km.sup.2 x3.5 km.sup.2, upgraded to 5.5 km.sup.2 x3.5 km.sup.2 in August 20...

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Veröffentlicht in:Atmospheric measurement techniques 2020-07, Vol.13 (7), p.3751-3767
Hauptverfasser: Vigouroux, Corinne, Langerock, Bavo, Bauer Aquino, Carlos Augusto, Blumenstock, Thomas, Cheng, Zhibin, De Mazière, Martine, De Smedt, Isabelle, Grutter, Michel, Hannigan, James W, Jones, Nicholas, Kivi, Rigel, Loyola, Diego, Lutsch, Erik, Mahieu, Emmanuel, Makarova, Maria, Metzger, Jean-Marc, Morino, Isamu, Murata, Isao, Nagahama, Tomoo, Notholt, Justus, Ortega, Ivan, Palm, Mathias, Pinardi, Gaia, Röhling, Amelie, Smale, Dan, Stremme, Wolfgang, Strong, Kim, Sussmann, Ralf, Té, Yao, van Roozendael, Michel, Wang, Pucai, Winkler, Holger
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Sprache:eng
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Zusammenfassung:TROPOMI (the TROPOspheric Monitoring Instrument), on board the Sentinel-5 Precursor (S5P) satellite, has been monitoring the Earth's atmosphere since October 2017 with an unprecedented horizontal resolution (initially 7 km.sup.2 x3.5 km.sup.2, upgraded to 5.5 km.sup.2 x3.5 km.sup.2 in August 2019). Monitoring air quality is one of the main objectives of TROPOMI; it obtains measurements of important pollutants such as nitrogen dioxide, carbon monoxide, and formaldehyde (HCHO). In this paper we assess the quality of the latest HCHO TROPOMI products versions 1.1.(5-7), using ground-based solar-absorption FTIR (Fourier-transform infrared) measurements of HCHO from 25 stations around the world, including high-, mid-, and low-latitude sites. Most of these stations are part of the Network for the Detection of Atmospheric Composition Change (NDACC), and they provide a wide range of observation conditions, from very clean remote sites to those with high HCHO levels from anthropogenic or biogenic emissions. The ground-based HCHO retrieval settings have been optimized and harmonized at all the stations, ensuring a consistent validation among the sites.
ISSN:1867-8548
1867-1381
1867-8548
DOI:10.5194/amt-13-3751-2020