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Atmospheric Measurement Techniques An interactive open-access journal of the European Geosciences Union
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Discussion papers
https://doi.org/10.5194/amt-2019-301
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/amt-2019-301
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Submitted as: research article 02 Sep 2019

Submitted as: research article | 02 Sep 2019

Review status
This discussion paper is a preprint. It is a manuscript under review for the journal Atmospheric Measurement Techniques (AMT).

Atmospheric ammonia (NH3) over the Paris megacity: 9 years of total column observations from ground-based infrared remote sensing

Benoît Tournadre1,a, Pascale Chelin1, Mokhtar Ray1, Juan Cuesta1, Rebecca D. Kutzner1, Xavier Landsheere1, Audrey Fortems-Cheiney1,b, Jean-Marie Flaud1, Frank Hase2, Thomas Blumenstock2, Johannes Orphal2, Camille Viatte3, and Claude Camy-Peyret4 Benoît Tournadre et al.
  • 1Laboratoire Interuniversitaire des Systèmes Atmosphériques (LISA), UMR CNRS 7583, Université Paris-Est Créteil, Université de Paris, Institut Pierre Simon Laplace(IPSL), Créteil, France
  • 2Institut für Meteorologieund Klimaforschung (IMK), KarlsruherInstitut für Technologie (KIT), Karlsruhe, Germany
  • 3Laboratoire Atmosphères, Milieux, Observations Spatiales(LATMOS), UMR CNRS 8190, UPMC, Université Versailles St. Quentin, Institut Pierre Simon Laplace, Paris, France
  • 4Institut Pierre Simon Laplace (IPSL), UPMC/UVSQ, Paris, France
  • acurrently at: Centre for Observation, Impacts, Energy, Mines ParisTech, Sophia Antipolis, France
  • bcurrently at: Laboratoire des Sciences du Climat et de l’Environnement, UMR 8212, CEA/Orme des Merisiers, 91191 Gif sur Yvette, France

Abstract. In this paper, we present the first multi-year time series of atmospheric NH3 ground-based measurements in the Paris region (Créteil, 48.79° N, 2.44° E, France) retrieved with the mid-resolution “Observations of the Atmosphere by Solar absorption Infrared Spectroscopy” (OASIS) ground-based Fourier Transform infrared solar observatory. Located in an urban region, OASIS has previously been used for monitoring air quality (tropospheric ozone and carbon monoxide), thanks to its specific column sensitivity across the whole troposphere including the planetary boundary layer. A total of 4920 measurements of atmospheric total columns of ammonia have been obtained from 2009 to 2017, with uncertainties ranging from 20 % to 35 %, and are compared with NH3 concentrations derived from the Infrared Atmospheric Sounding Interferometer (IASI). OASIS ground-based measurements show significant interannual, and seasonal variabilities of atmospheric ammonia. NH3 total columns over the Paris megacity (12 million people) vary seasonally by 2 orders of magnitude, from approximately 1015 molecules cm−2 in winter to 1017 molecules cm−2 for spring peaks, probably due to springtime spreading of fertilizers on surrounding croplands. Also, we observe a correlation of daily NH3-OASIS total columns with daily PM2.5 in situ measurements from the closest Airparif surface station in springtime.

Benoît Tournadre et al.
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Benoît Tournadre et al.
Benoît Tournadre et al.
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Latest update: 13 Nov 2019
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Short summary
Here, we present some results about ammonia (NH3) pollution because NH3, mainly emitted by agricultural activities is a precursor of fine particles. This study is based on the first multi-year time series (2009–2017) of atmospheric NH3 measurements over the Paris megacity. This pollutant varies seasonally by 2 orders of magnitude with especially spring peaks. We highlight that this kind of instrument could be easily installed and very useful to analyze NH3 in other megacities or source regions.
Here, we present some results about ammonia (NH3) pollution because NH3, mainly emitted by...
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