Articles | Volume 8, issue 6
Atmos. Meas. Tech., 8, 2371–2395, 2015
https://doi.org/10.5194/amt-8-2371-2015
Atmos. Meas. Tech., 8, 2371–2395, 2015
https://doi.org/10.5194/amt-8-2371-2015

Research article 08 Jun 2015

Research article | 08 Jun 2015

The CU 2-D-MAX-DOAS instrument – Part 1: Retrieval of 3-D distributions of NO2 and azimuth-dependent OVOC ratios

I. Ortega et al.

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Short summary
We describe the University of Colorado 2-D-MAX-DOAS instrument and a retrieval to measure 3-D distributions of NO2. The spatial scale over which NO2 is probed is systematically varied by measuring NO2 at three different wavelengths. This has a significant effect on the comparison with the NO2 VCD as measured by OMI. The challenges and opportunities to validate satellites under inhomogeneous conditions as well as to pinpoint hydrocarbon chemistry around the measurement site are discussed.