Ground-based validation of the MetOp-A and MetOp-B GOME-2 OClO measurements
| dc.contributor.author | Pinardi, G. | |
| dc.contributor.author | Van Roozendael, M. | |
| dc.contributor.author | Hendrick, F. | |
| dc.contributor.author | Richter, A. | |
| dc.contributor.author | Valks, P. | |
| dc.contributor.author | Alwarda, R. | |
| dc.contributor.author | Bognar, K. | |
| dc.contributor.author | Frieß, U. | |
| dc.contributor.author | Granville, J. | |
| dc.contributor.author | Gu, M. | |
| dc.contributor.author | Johnston, P. | |
| dc.contributor.author | Prados-Roman, C. | |
| dc.contributor.author | Querel, R. | |
| dc.contributor.author | Strong, K. | |
| dc.contributor.author | Wagner, T. | |
| dc.contributor.author | Wittrock, F. | |
| dc.contributor.author | Yela Gonzalez, M. | |
| dc.date | 2022 | |
| dc.date.accessioned | 2022-06-09T12:21:20Z | |
| dc.date.available | 2022-06-09T12:21:20Z | |
| dc.identifier.uri | https://orfeo.belnet.be/handle/internal/9950 | |
| dc.description | This paper reports on ground-based validation of the atmospheric OClO data record produced within the framework of EUMETSAT's Satellite Application Facility on Atmospheric Chemistry Monitoring (AC SAF) using the Global Ozone Monitoring Experiment (GOME)-2A and GOME-2B instrument measurements, covering the 2007–2016 and 2013–2016 periods, respectively. OClO slant column densities are compared to correlative measurements collected from nine Zenith-Scattered-Light Differential Optical Absorption Spectroscopy (ZSL-DOAS) instruments from the Network for the Detection of Atmospheric Composition Change (NDACC) distributed in both the Arctic and Antarctic. Sensitivity tests are performed on the ground-based data to estimate the impact of the different OClO DOAS analysis settings. On this basis, we infer systematic uncertainties of about 25 % (i.e., about 3.75×1013 molec. cm−2) between the different ground-based data analyses, reaching total uncertainties ranging from about 26 % to 33 % for the different stations (i.e., around 4 to 5×1013 molec. cm−2). Time series at the different sites show good agreement between satellite and ground-based data for both the inter-annual variability and the overall OClO seasonal behavior. GOME-2A results are found to be noisier than those of GOME-2B, especially after 2011, probably due to instrumental degradation effects. Daily linear regression analysis for OClO-activated periods yield correlation coefficients of 0.8 for GOME-2A and 0.87 for GOME-2B, with slopes with respect to the ground-based data ensemble of 0.64 and 0.72, respectively. Satellite minus ground-based offsets are within 8×1013 molec. cm−2, with some differences between GOME-2A and GOME-2B depending on the station. Overall, considering all the stations, a median offset of about -2.2x10*13 molec. cm−2 is found for both GOME-2 instruments. | |
| dc.language | eng | |
| dc.title | Ground-based validation of the MetOp-A and MetOp-B GOME-2 OClO measurements | |
| dc.type | Article | |
| dc.subject.frascati | Earth and related Environmental sciences | |
| dc.audience | Scientific | |
| dc.source.title | Atmospheric Measurement Techniques | |
| dc.source.volume | 15 | |
| dc.source.issue | 11 | |
| dc.source.page | 3439-3463 | |
| Orfeo.peerreviewed | Yes | |
| dc.identifier.doi | 10.5194/amt-15-3439-2022 | |
| dc.identifier.scopus |
