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Atmospheric Measurement Techniques An interactive open-access journal of the European Geosciences Union
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© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 05 Jul 2018

Research article | 05 Jul 2018

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

Laser induced fluorescence based detection of atmospheric nitrogen dioxide and comparison of different techniques during the PARADE 2011 field campaign

Umar Javed1,2, Dagmar Kubistin1,3,4, Monica Martinez1, Jan Pollmann1, Markus Rudolf1, Uwe Parchatka1, Andreas Reiffs1, Jim Thieser1, Gerhard Schuster1, Martin Horbanski5, Denis Pöhler5, John N. Crowley1, Horst Fischer1, Jos Lelieveld1, and Hartwig Harder1 Umar Javed et al.
  • 1Department of Atmospheric Chemistry, Max Planck Institute for Chemistry, Mainz, Germany
  • 2Institute of Energy and Climate Research, IEK-8: Troposphere, Forschungszentrum Jülich GmbH, Jülich, Germany
  • 3University of Wollongong, School of Chemistry, Wollongong, NSW, Australia
  • 4German Meteorological Service, Meteorological Observatory Hohenpeissenberg (MOHp), Hohenpeissenberg, Germany
  • 5Institute of Environmental Physics, University of Heidelberg, Heidelberg, Germany

Abstract. GANDALF (Gas Analyzer for Nitrogen Dioxide Applying Laser-induced Fluorescence), a new instrument for the detection of nitrogen dioxide based on the laser-induced fluorescence (LIF) technique, is presented in this paper. GANDALF is designed for ground based and air-borne deployment with a robust calibration system. In the current setup, it uses a multi-mode diode laser (447–450nm) and performs in situ, continuous, and autonomous measurements with a laser pulse repetition rate of 5MHz. The performance of GANDALF was tested during the field experiment at a forested location with urban influence where NOx levels were between 0.12 and 22 parts per billion by volume (ppbv). Based on the field results, the limit of detection is estimated at 5–10 parts per trillion by volume (pptv) in 60s at a signal to noise ratio (SNR) of 2. The overall accuracy and precision of the instrument are better than 5% (1σ) and 0.5%+3pptv (1σmin−1), respectively. A comparison of nitrogen dioxide measurements based on several techniques during the field campaign is presented to explore methodic differences.

Umar Javed et al.
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Status: final response (author comments only)
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Umar Javed et al.
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Publications Copernicus
Short summary
Nitrogen dioxide (NO2) affects the concentration of key species like ozone, hydroxyl radical, and nitrate radical in the atmosphere. In-situ, direct and interference-free NO2 measurements are important to validate our understanding of NOx chemistry related to the ozone formation, and the radical loss process. This article describes the important features and performance of a newly developed NO2 instrument during a field inter-comparison.
Nitrogen dioxide (NO2) affects the concentration of key species like ozone, hydroxyl radical,...