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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/amtd-2-2027-2009
© Author(s) 2009. This work is distributed under
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/amtd-2-2027-2009
© Author(s) 2009. This work is distributed under
the Creative Commons Attribution 3.0 License.

Submitted as:   28 Aug 2009

Submitted as:   | 28 Aug 2009

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This discussion paper is a preprint. A revision of the manuscript for further review has not been submitted.

Development and application of a new mobile LOPAP instrument for the measurement of HONO altitude profiles in the planetary boundary layer

R. Häseler, T. Brauers, F. Holland, and A. Wahner R. Häseler et al.
  • ICG-2, Forschungszentrum Jülich, 52425 Jülich, Germany

Abstract. The LOPAP (long path absorption) technique has been shown to be very sensitive for the detection of nitrous acid (HONO) in the atmosphere. However, current instruments were mainly built for ground based applications. Therefore, we designed a new LOPAP instrument to be more versatile for mobile measurements and to meet the requirements for airborne application. The detection limit of the new instrument is below 1 ppt at a time resolution of 5 to 7 min. As a first test, the instrument was successfully employed during the ZEPTER-1 campaign in July 2007 on board of the Zeppelin NT airship. During 15 flights on six days we measured HONO concentration profiles over southwest Germany, predominantly in the range between 100 m and 650 m above ground level. On average, a mixing ratio of 34 ppt was observed, almost independently of height. Within a econd campaign, ZEPTER-2 in fall 2008, higher HONO mixing ratios were observed in the Lake Constance area.

R. Häseler et al.
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Status: closed (peer review stopped)
Status: closed (peer review stopped)
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Interactive discussion
Status: closed (peer review stopped)
Status: closed (peer review stopped)
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
Printer-friendly Version - Printer-friendly version Supplement - Supplement
R. Häseler et al.
R. Häseler et al.
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