Articles | Volume 16, issue 5
Atmos. Chem. Phys., 16, 2803–2817, 2016
https://doi.org/10.5194/acp-16-2803-2016
Atmos. Chem. Phys., 16, 2803–2817, 2016
https://doi.org/10.5194/acp-16-2803-2016

Research article 04 Mar 2016

Research article | 04 Mar 2016

Estimates of free-tropospheric NO2 and HCHO mixing ratios derived from high-altitude mountain MAX-DOAS observations at midlatitudes and in the tropics

Stefan F. Schreier et al.

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AR: Author's response | RR: Referee report | ED: Editor decision
AR by Stefan Schreier on behalf of the Authors (11 Jan 2016)  Author's response    Manuscript
ED: Reconsider after minor revisions (Editor review) (02 Feb 2016) by Michel Van Roozendael
AR by Stefan Schreier on behalf of the Authors (11 Feb 2016)  Author's response    Manuscript
ED: Publish as is (24 Feb 2016) by Michel Van Roozendael
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Short summary
Mixing ratios of NO2 and HCHO in the free troposphere are obtained from MAX-DOAS measurements at two mountain stations at midlatitudes and in the tropics using a modified geometrical approach. The method is applied in the UV wavelength range and, thus, allows the detection of HCHO mixing ratios, in addition to NO2. We find that mixing ratios of both species are increased in the tropical free troposphere due to biomass burning.
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