2D-MAX-DOAS

In order to explore additional capabilities of the MAX-DOAS, a novel 2D telescope was designed to perform azimuth scans from 0-360˚, and direct sun measurements in addition to the elevation angles. The additional viewing geometries enable the retrieval of aerosol optical/micro-physical properties and Raman scattering to investigate additional information of clouds and aerosols, all with a single portable instrument. The 2D-CU-MAX-DOAS was deployed during the intensive operation period of the TCAP campaign in Cape Cod, MA (2012) and during the CINDI-2 campaign in Cabauw, The Netherlands (2016).

 

2d max doas

 

Relevant publications:

Kreher et al.: Intercomparison of NO2, O4, O3, and HCHO slant column measurements by MAX-DOAS and zenith-sky UV-visible spectrometers during the CINDI-2 campaign, Atmos. Meas. Tech., 13, 2169-2208, doi:10.5194/amt-13-2169-2020, 2020.

Ortega et al.: The CU 2D-MAX-DOAS instrument - Part 2: Raman scattering probability measurements and retrieval of aerosol optical properties, Atmos. Meas. Tech., 9, 3893-3910, doi:10.5194/amt-9-3893-2016, 2016.

Ortega et al.: Elevated aerosol layers modify the O2-O2 absorption measured by ground-based MAX-DOAS, J. Quant. Spectr. Radiat. Transf., 176, 34-49, doi:10.1016/j.jqsrt.2016.02.021, 2016.

Berg et al.: The Two-Column Aerosol Project: Phase I - Overview and Impact of Elevated Aerosol Layers on Aerosol Optical Depth, J. Geophys. Res. - Atmos., 121 (1), 336-361, doi:10.1002/2015JD023848, 2016.

Ortega et al.: The CU 2D-MAX-DOAS instrument - Part 1: Retrieval of 3-D distributions of NO2 and azimuth-dependent OVOC ratios, Atmos. Meas. Tech., 8, 2371-2395, doi:10.5194/amt-8-2371-2015, 2015.