Journal cover Journal topic
Atmospheric Measurement Techniques An interactive open-access journal of the European Geosciences Union
Journal topic

Journal metrics

Journal metrics

  • IF value: 3.400 IF 3.400
  • IF 5-year value: 3.841 IF 5-year
    3.841
  • CiteScore value: 3.71 CiteScore
    3.71
  • SNIP value: 1.472 SNIP 1.472
  • IPP value: 3.57 IPP 3.57
  • SJR value: 1.770 SJR 1.770
  • Scimago H <br class='hide-on-tablet hide-on-mobile'>index value: 70 Scimago H
    index 70
  • h5-index value: 49 h5-index 49
Discussion papers
https://doi.org/10.5194/amt-2019-331
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/amt-2019-331
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Submitted as: research article 13 Nov 2019

Submitted as: research article | 13 Nov 2019

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

The influence of the baseline drift on the resulting extinction values of a CAPS PMex

Sascha Pfeifer1, Thomas Müller1, Andrew Freedman2, and Alfred Wiedensohler1 Sascha Pfeifer et al.
  • 1Leibniz Institute for Tropospheric Research, Permoserstraße 15, 04318 Leipzig, Germany
  • 2Aerodyne Research Inc., 45 Manning Road, Billerica, MA 01821-3976, USA

Abstract. The effect of the baseline drift on the resulting extinction values of three CAPS PMex monitors with different wavelengths and the respective correlation with NO2 was analysed for an urban background station. A drift of more than 0.8 Mm−1 min−1 was observed for ambient air, with high probability caused by traffic emissions driven changes in carrier gas composition.

The baseline drift leads to characteristic measurement artefacts for particle extinction. Artificial particle extinction values of approximately 4 Mm−1 where observed using a baseline period of 5 min. These values can be even higher for longer baseline periods.

A new method is shown to minimize this effect. Modified continuous baseline values are calculated in a post-processing step using cubic smoothing splines. With this approach the extinction artefacts are diminished and the effective scattering of the resulting extinction values is reduced by about 50 %.

Sascha Pfeifer et al.
Interactive discussion
Status: open (until 08 Jan 2020)
Status: open (until 08 Jan 2020)
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
[Subscribe to comment alert] Printer-friendly Version - Printer-friendly version Supplement - Supplement
Sascha Pfeifer et al.
Sascha Pfeifer et al.
Viewed  
Total article views: 148 (including HTML, PDF, and XML)
HTML PDF XML Total BibTeX EndNote
115 33 0 148 1 1
  • HTML: 115
  • PDF: 33
  • XML: 0
  • Total: 148
  • BibTeX: 1
  • EndNote: 1
Views and downloads (calculated since 13 Nov 2019)
Cumulative views and downloads (calculated since 13 Nov 2019)
Viewed (geographical distribution)  
Total article views: 83 (including HTML, PDF, and XML) Thereof 83 with geography defined and 0 with unknown origin.
Country # Views %
  • 1
1
 
 
 
 
Cited  
Saved  
No saved metrics found.
Discussed  
No discussed metrics found.
Latest update: 13 Dec 2019
Publications Copernicus
Download
Short summary
The effect of the baseline drift on the resulting extinction values of three CAPS PMex monitors with different wavelengths was analysed for a urban background station. A significant baseline drift was observed, which leads to characteristic measurement artefacts for particle extinction. A new method is shown to minimize this effect. With this approach the extinction artefacts are diminished and the effective scattering of the resulting extinction values is reduced.
The effect of the baseline drift on the resulting extinction values of three CAPS PMex monitors...
Citation