Articles | Volume 13, issue 5
Atmos. Meas. Tech., 13, 2161–2167, 2020
https://doi.org/10.5194/amt-13-2161-2020
Atmos. Meas. Tech., 13, 2161–2167, 2020
https://doi.org/10.5194/amt-13-2161-2020

Research article 05 May 2020

Research article | 05 May 2020

The influence of the baseline drift on the resulting extinction values of a cavity attenuated phase shift-based extinction monitor (CAPS PMex)

Sascha Pfeifer et al.

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Latest update: 26 Feb 2021
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Short summary
The effect of the baseline drift on the resulting extinction values of three CAPS PMex monitors with different wavelengths was analysed for an urban background station. A significant baseline drift was observed, which leads to characteristic measurement artefacts for particle extinction. Two alternative methods for recalculating the baseline are shown. With these methods the extinction artefacts are diminished and the effective scattering of the resulting extinction values is reduced.