Towards a New MAX-DOAS Measurement Site in the Po Valley: Aerosol Optical Depth and NO2 Tropospheric VCDs
| dc.contributor.author | Castelli, E. | |
| dc.contributor.author | Pettinari, P. | |
| dc.contributor.author | Papandrea, E. | |
| dc.contributor.author | Premuda, M. | |
| dc.contributor.author | Achilli, A. | |
| dc.contributor.author | Richter, A. | |
| dc.contributor.author | Bösch, T. | |
| dc.contributor.author | Hendrick, F. | |
| dc.contributor.author | Fayt, C. | |
| dc.contributor.author | Beirle, S. | |
| dc.contributor.author | Friedrich, M.M. | |
| dc.contributor.author | Van Roozendael, M. | |
| dc.contributor.author | Wagner, T. | |
| dc.contributor.author | Valeri, M. | |
| dc.date | 2025 | |
| dc.date.accessioned | 2025-03-19T13:43:18Z | |
| dc.date.available | 2025-03-19T13:43:18Z | |
| dc.identifier.uri | https://orfeo.belnet.be/handle/internal/13995 | |
| dc.description | Pollutants information can be retrieved from visible (VIS) and ultraviolet (UV) diffuse solar spectra exploiting Multi-AXis Differential Optical Absorption Spectroscopy (MAX-DOAS) instruments. In May 2021, the Italian research institute CNR-ISAC acquired and deployed a MAX-DOAS system SkySpec-2D. It is located in the “Giorgio Fea” observatory in San Pietro Capofiume (SPC), in the middle of the Po Valley, where it has constantly acquired zenith and off-axis diffuse solar spectra since the 1st October 2021. This work presents the retrieved tropospheric NO2 and aerosol extinction profiles (and their columns) derived from the MAX-DOAS measurements using the newly developed DEAP retrieval code. The code has been validated both using synthetic differential Slant Column Densities (dSCDs) from the Fiducial Reference Measurements for Ground-Based DOAS Air-Quality Observations (FRM4DOAS) project and real measured data. For this purpose, DEAP results are compared with the ones obtained with three state-of-the-art retrieval codes. In addition, an inter-comparison with satellite products from Sentinel-5P TROPOMI, for the tropospheric NO2 Vertical Column Densities (VCDs), and MODIS-MAIAC for the tropospheric Aerosol Optical Depth (AOD), is performed. We find a bias of −0.6 × 1015 molec/cm2 with a standard deviation of 1.8 × 1015 molec/cm2 with respect to Sentinel-5P TROPOMI for NO2 tropospheric VCDs and of 0.04 ± 0.08 for AOD with respect to MODIS-MAIAC data. The retrieved data show that the SPC measurement site is representative of the background pollution conditions of the Po Valley. For this reason, it is a good candidate for satellite validation and scientific studies over the Po Valley. | |
| dc.language | eng | |
| dc.title | Towards a New MAX-DOAS Measurement Site in the Po Valley: Aerosol Optical Depth and NO2 Tropospheric VCDs | |
| dc.type | Article | |
| dc.subject.frascati | Earth and related Environmental sciences | |
| dc.audience | Scientific | |
| dc.subject.free | MAX-DOAS | |
| dc.subject.free | earth observation | |
| dc.subject.free | remote sensing | |
| dc.subject.free | Po Valley | |
| dc.source.title | Remote Sensing | |
| dc.source.volume | 17 | |
| dc.source.issue | 6 | |
| dc.source.page | A1035 | |
| Orfeo.peerreviewed | Yes | |
| dc.identifier.doi | 10.3390/rs17061035 | |
| dc.identifier.url |