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Atmospheric Measurement Techniques An interactive open-access journal of the European Geosciences Union
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  15 Dec 2020

15 Dec 2020

Review status: this preprint is currently under review for the journal AMT.

Internal consistency of the IAGOS ozone and carbon monoxide measurements for the last 25 years

Romain Blot1, Philippe Nedelec1, Damien Boulanger1, Pawel Wolff1, Bastien Sauvage1, Jean-Marc Cousin1, Gilles Athier1, Andreas Zahn2, Florian Obersteiner2, Dieter Scharffe5, Hervé Petetin3, Yasmine Bennouna1, Hannah Clark4, and Valérie Thouret1 Romain Blot et al.
  • 1Laboratoire d'aérologie (LA), CNRS UMR-5560 et Observatoire Midi-Pyrénées, Université de Toulouse, France
  • 2IAGOS-AISBL, 98 Rue du Trone, Brussels, Belgium
  • 3Barcelona Supercomputing Center (BSC), Barcelona, Spain
  • 4Karlsruhe Institute of Technology (KIT), Institute for Meteorology and Climate Research (IMK), Karksruhe, Germany
  • 5Max-Planck-Institut für Chemie (MPI), Air Chemistry Dvivision, Hahn-Meitner-Weg, 55128 Mainz, Germany

Abstract. The In-service Aircraft for a Global Observing System is a European research infrastructure that equips Airbus A340/330 with a system for monitoring atmospheric composition. The IAGOS instruments have three different configurations: IAGOS-CORE, IAGOS-MOZAIC and IAGOS-CARIBIC. Since 1994, there have been a total of 17 aircraft equipped. In this study, we perform an inter-comparison of about 8000 landing and take-off profiles to compare the O3 and CO measurements performed from these different configurations. The collocated profiles used in the study met various selection criteria. The first was a maximal 1 hour time difference between an ascent or descent by two different aircraft at the same airport and the second was a selection based on the similarity of air masses based on the meteorological data acquired by the aircraft. We provide here an evaluation of the internal consistency of the O3 and CO measurements since 1994. For both O3 and CO, we find no drift in the bias amongst the different instrument units (6 O3 and 6 CO IAGOS-MOZAIC instruments, 9 IAGOS-CORE Package 1 and the 2 instruments used in the IAGOS-CARIBIC aircraft). This results gives us confidence that the entire IAGOS data base can be treated as one continuous program, and is therefore appropriate for studies of long-term trends.

Romain Blot et al.

Status: open (until 27 Feb 2021)
Status: open (until 27 Feb 2021)
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Romain Blot et al.

Romain Blot et al.


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