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dc.contributor.authorCompernolle, Steven
dc.contributor.authorArgyrouli, Athina
dc.contributor.authorLutz, Ronny
dc.contributor.authorSneep, Maarten
dc.contributor.authorLambert, Jean-Christopher
dc.contributor.authorFjæraa, Ann Mari
dc.contributor.authorHubert, Daan
dc.contributor.authorKeppens, Arno
dc.contributor.authorLoyola, Diego
dc.contributor.authorO'Connor, Ewan
dc.contributor.authorRomahn, Fabian
dc.contributor.authorStammes, Piet
dc.contributor.authorVerhoelst, Tijl
dc.contributor.authorWang, Ping
dc.date.accessioned2021-05-19T07:15:41Z
dc.date.available2021-05-19T07:15:41Z
dc.date.created2021-05-18T09:40:19Z
dc.date.issued2021
dc.identifier.citationAtmospheric Measurement Techniques. 2021, 14, 2451-2476.en_US
dc.identifier.issn1867-1381
dc.identifier.urihttps://hdl.handle.net/11250/2755558
dc.description.abstractAccurate knowledge of cloud properties is essential to the measurement of atmospheric composition from space. In this work we assess the quality of the cloud data from three Copernicus Sentinel-5 Precursor (S5P) TROPOMI cloud products: (i) S5P OCRA/ROCINN_CAL (Optical Cloud Recognition Algorithm/Retrieval of Cloud Information using Neural Networks;Clouds-As-Layers), (ii) S5P OCRA/ROCINN_CRB (Clouds-as-Reflecting Boundaries), and (iii) S5P FRESCO-S (Fast Retrieval Scheme for Clouds from Oxygen absorption bands – Sentinel). Target properties of this work are cloud-top height and cloud optical thickness (OCRA/ROCINN_CAL), cloud height (OCRA/ROCINN_CRB and FRESCO-S), and radiometric cloud fraction (all three algorithms). The analysis combines (i) the examination of cloud maps for artificial geographical patterns, (ii) the comparison to other satellite cloud data (MODIS, NPP-VIIRS, and OMI O2–O2), and (iii) ground-based validation with respect to correlative observations (30 April 2018 to 27 February 2020) from the Cloudnet network of ceilometers, lidars, and radars. Zonal mean latitudinal variation of S5P cloud properties is similar to that of other satellite data. S5P OCRA/ROCINN_CAL agrees well with NPP VIIRS cloud-top height and cloud optical thickness and with Cloudnet cloud-top height, especially for the low (mostly liquid) clouds. For the high clouds, S5P OCRA/ROCINN_CAL cloud-top height is below the cloud-top height of VIIRS and of Cloudnet, while its cloud optical thickness is higher than that of VIIRS. S5P OCRA/ROCINN_CRB and S5P FRESCO cloud height are well below the Cloudnet cloud mean height for the low clouds but match on average better with the Cloudnet cloud mean height for the higher clouds. As opposed to S5P OCRA/ROCINN_CRB and S5P FRESCO, S5P OCRA/ROCINN_CAL is well able to match the lowest CTH mode of the Cloudnet observations. Peculiar geographical patterns are identified in the cloud products and will be mitigated in future releases of the cloud data products.en_US
dc.language.isoengen_US
dc.rightsNavngivelse 4.0 Internasjonal*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/deed.no*
dc.titleValidation of the Sentinel-5 Precursor TROPOMI cloud data withCloudnet, Aura OMI O2–O2, MODIS, and Suomi-NPP VIIRen_US
dc.typePeer revieweden_US
dc.typeJournal articleen_US
dc.description.versionpublishedVersionen_US
dc.rights.holder© Author(s) 2021.en_US
dc.source.pagenumber2451-2476en_US
dc.source.volume14en_US
dc.source.journalAtmospheric Measurement Techniquesen_US
dc.identifier.doi10.5194/amt-14-2451-2021
dc.identifier.cristin1910388
cristin.ispublishedtrue
cristin.fulltextoriginal
cristin.fulltextoriginal
cristin.qualitycode1


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