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TROPOMI--Sentinel-5 Precursor formaldehyde validation using an extensive network of ground-based Fourier-transform infrared stations

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Academic year: 2021

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Figure 1. Network of ground-based FTIR stations providing HCHO total column data. The background is the September 2018 monthly mean of TROPOMI HCHO tropospheric columns, averaged on a 0.2 ◦ × 0.2 ◦ grid using the HARP tool v.1.5 (https://atmospherictoolbox
Table 2. FTIR stations that contribute to the present work: location, altitude (in kilometres above sea level), instrument type, retrieval code, and team.
Table 3. Validation of TROPOMI RPRO + OFFL. Please note that the ordering of the sites is by increasing mean HCHO column
Figure 4. Scatter plots of TROPOMI versus FTIR data for individual collocated pairs ( ± 3 h; a), and for the monthly means of collocated data (b)
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