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Validation of the Sentinel-5 Precursor TROPOMI cloud data with Cloudnet, Aura OMI O2-O2, MODIS, and Suomi-NPP VIIRS

Compernolle, Steven and Argyrouli, Athina and Lutz, Ronny and Sneep, Maarten and Lambert, Jean-Christopher and Fjæraa, Ann Mari and Hubert, Daan and Keppens, Arno and Loyola, Diego and O'Connor, Ewan and Romahn, Fabian and Stammes, Piet and Verhoelst, Tijl and Wang, Ping (2021) Validation of the Sentinel-5 Precursor TROPOMI cloud data with Cloudnet, Aura OMI O2-O2, MODIS, and Suomi-NPP VIIRS. Atmospheric Measurement Techniques (AMT), 14 (3), pp. 2451-2476. Copernicus Publications. doi: 10.5194/amt-14-2451-2021. ISSN 1867-1381.

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Official URL: https://amt.copernicus.org/articles/14/2451/2021/


Accurate 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.

Item URL in elib:https://elib.dlr.de/141643/
Document Type:Article
Title:Validation of the Sentinel-5 Precursor TROPOMI cloud data with Cloudnet, Aura OMI O2-O2, MODIS, and Suomi-NPP VIIRS
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Compernolle, StevenRoyal Belgian Institute for Space Aeronomy (BIRA)https://orcid.org/0000-0003-0872-0961
Argyrouli, Athinaathina.argyrouli (at) dlr.deUNSPECIFIED
Lutz, RonnyRonny.Lutz (at) dlr.deUNSPECIFIED
Sneep, MaartenRoyal Netherlands Meteorological Institute (KNMI)https://orcid.org/0000-0001-6887-5653
Lambert, Jean-ChristopherRoyal Belgian Institute for Space Aeronomy (BIRA)UNSPECIFIED
Fjæraa, Ann MariNorsk Institutt for Luftforskning (NILU)UNSPECIFIED
Hubert, DaanRoyal Belgian Institute for Space Aeronomy (BIRA-IASB), Uccle, Belgiumhttps://orcid.org/0000-0002-4365-865X
Keppens, ArnoRoyal Belgian Institute for Space Aeronomy (BIRA-IASB), Uccle, Belgiumhttps://orcid.org/0000-0002-9544-6392
Loyola, DiegoDiego.Loyola (at) dlr.dehttps://orcid.org/0000-0002-8547-9350
O'Connor, EwanFinnish Meteorological Institute (FMI)UNSPECIFIED
Romahn, FabianFabian.Romahn (at) dlr.deUNSPECIFIED
Stammes, PietRoyal Netherlands Meteorological Institute (KNMI)UNSPECIFIED
Verhoelst, TijlRoyal Belgian Institute for Space Aeronomy (BIRA-IASB), Uccle, Belgiumhttps://orcid.org/0000-0003-0163-9984
Wang, PingRoyal Netherlands Meteorological Institute (KNMI)UNSPECIFIED
Date:31 March 2021
Journal or Publication Title:Atmospheric Measurement Techniques (AMT)
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In ISI Web of Science:Yes
DOI :10.5194/amt-14-2451-2021
Page Range:pp. 2451-2476
Publisher:Copernicus Publications
Keywords:Remote Sensing, Clouds, TROPOMI, Validation
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Earth Observation
DLR - Research theme (Project):R - Atmospheric and climate research, Vorhaben Spectroscopic Methods in Remote Sensing (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Remote Sensing Technology Institute > Atmospheric Processors
Deposited By: Lutz, Dr. Ronny
Deposited On:01 Apr 2021 13:12
Last Modified:06 Apr 2021 09:36

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