Aura Ozone Monitoring Instrument (OMI) Collection 4 formaldehyde products

This study presents the ozone monitoring instrument (OMI) Collection 4 formaldehyde (HCHO) retrieval developed with the Smithsonian Astrophysical Observatory's (SAO) Making Earth System Data Records for Use in Research Environments (MEaSUREs) algorithm. The retrieval algorithm updates and makes improvements to the NASA operational OMI HCHO (OMI Collection 3 HCHO) algorithm, and has been transitioned to use OMI Collection 4 Level‐1B radiances. This paper describes the updated retrieval algorithm and compares Collection 3 and Collection 4 data products. The OMI Collection 4 HCHO exhibits remarkably improved stability over time in comparison to the OMI Collection 3 HCHO product, with better precision and the elimination of artificial trends present in the Collection 3 during the later years of the mission. We validate the OMI Collection 4 HCHO data product using Fourier‐Transform Infrared (FTIR) ground‐based HCHO measurements. The climatological monthly averaged OMI Collection 4 HCHO vertical column densities (VCDs) agree well with the FTIR VCDs, with a correlation coefficient of 0.83, root‐mean‐square error (RMSE) of molecules , regression slope of 0.79, and intercept of molecules . Additionally, we compare the monthly averaged OMI Collection 4 HCHO VCDs to OMPS Suomi NPP, OMPS NOAA‐20, and TROPOMI HCHO VCDs in overlapping years for 12 geographic regions. This comparison demonstrates high correlation coefficients of 0.98 (OMPS Suomi NPP), 0.97 (OMPS NOAA‐20), and 0.90 (TROPOMI).

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Related Links

Related Dataset #1 : OMI/Aura Level 1B UV Global Geolocated Earthshine Radiances 1-orbit L2 Swath 13x24 km V4

Related Dataset #2 : OMI/Aura Formaldehyde (HCHO) Total Column 1-orbit L2 Swath 13x24 km

Related Dataset #3 : OMI/Aura Level 1B Solar Irradiances V4

Related Dataset #4 : OMPS-NOAA20 L2 NM Formaldehyde (HCHO) Total Column swath orbital V1

Related Dataset #5 : OMPS-NPP L2 NM Formaldehyde (HCHO) Total Column swath orbital V1

Related Dataset #6 : MCD12Q1 MODIS/Terra+Aqua Land Cover Type Yearly L3 Global 500m SIN Grid V006

Related Dataset #7 : MCD43C1 MODIS/Terra+Aqua BRDF/AlbedoModel Parameters Daily L3 Global 0.05Deg CMG V006

Related Dataset #8 : MODIS/Terra+Aqua BRDF/AlbedoModel Parameters Daily L3 Global 0.05Deg CMG V061

Related Dataset #9 : MERRA-2 tavg1_2d_slv_Nx: 2d,1-Hourly,Time-Averaged,Single-Level,Assimilation,Single-Level Diagnostics V5.12.4

Related Other #1 : IMS Daily Northern Hemisphere Snow and Ice Analysis at 1 km, 4 km, and 24 km Resolutions, Version 1
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Author Ayazpour, Z.
González Abad, G.
Nowlan, C. R.
Sun, K.
Kwon, H.
Chan Miller, C.
Chong, H.
Wang, H.
Liu, X.
Chance, K.
O’Sullivan, E.
Zhu, L.
Vigouroux, C.
De Smedt, I.
Stremme, W.
Hannigan, James W.
Notholt, J.
Sun, X.
Palm, M.
Petri, C.
Strong, K.
Röhling, A. N.
Mahieu, E.
Smale, D.
Té, Y.
Morino, I.
Murata, I.
Nagahama, T.
Kivi, R.
Makarova, M.
Jones, N.
Sussmann, R.
Zhou, M.
Publisher UCAR/NCAR - Library
Publication Date 2025-02-01T00:00:00
Digital Object Identifier (DOI) Not Assigned
Alternate Identifier N/A
Resource Version N/A
Topic Category geoscientificInformation
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Metadata Date 2025-07-10T19:54:47.657633
Metadata Record Identifier edu.ucar.opensky::articles:42924
Metadata Language eng; USA
Suggested Citation Ayazpour, Z., González Abad, G., Nowlan, C. R., Sun, K., Kwon, H., Chan Miller, C., Chong, H., Wang, H., Liu, X., Chance, K., O’Sullivan, E., Zhu, L., Vigouroux, C., De Smedt, I., Stremme, W., Hannigan, James W., Notholt, J., Sun, X., Palm, M., Petri, C., Strong, K., Röhling, A. N., Mahieu, E., Smale, D., Té, Y., Morino, I., Murata, I., Nagahama, T., Kivi, R., Makarova, M., Jones, N., Sussmann, R., Zhou, M.. (2025). Aura Ozone Monitoring Instrument (OMI) Collection 4 formaldehyde products. UCAR/NCAR - Library. https://n2t.net/ark:/85065/d7xk8kxj. Accessed 11 August 2025.

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