Diurnal, seasonal and long-term variations of global formaldehyde columns inferred from combined OMI and GOME-2 observations

De Smedt, I.; Stavrakou, T.; Hendrick, F.; Danckaert, T.; Vlemmix, T.; Pinardi, G.; Theys, N.; Lerot, C.; Gielen, C.; Vigouroux, C.; Hermans, C.; Fayt, C.; Veefkind, P.; Müller, J.-F.; Van Roozendael, M.

doi:10.5194/acp-15-12519-2015

Articles | Volume 15, issue 21

https://doi.org/10.5194/acp-15-12519-2015

© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.

Special issue:

Ten years of Ozone Monitoring Instrument (OMI) observations...

https://doi.org/10.5194/acp-15-12519-2015

© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.

Articles | Volume 15, issue 21

Research article

|

10 Nov 2015

Research article |

| 10 Nov 2015

Diurnal, seasonal and long-term variations of global formaldehyde columns inferred from combined OMI and GOME-2 observations

I. De Smedt, T. Stavrakou, F. Hendrick, T. Danckaert, T. Vlemmix, G. Pinardi, N. Theys, C. Lerot, C. Gielen, C. Vigouroux, C. Hermans, C. Fayt, P. Veefkind, J.-F. Müller, and M. Van Roozendael

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Jan 2020	11	9	0	20
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May 2024	34	28	1	63
Jun 2024	33	13	2	48
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Sep 2024	33	25	0	58
Oct 2024	52	9	1	62
Nov 2024	44	8	2	54
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May 2025	59	8	6	73
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Aug 2015	24	17	4	45
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Apr 2025	40	31	1	72
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Oct 2025	47	59	0	106
Nov 2025	65	43	4	112
Dec 2025	75	48	4	127
Jan 2026	91	35	10	136

Latest update: 30 Jan 2026

Short summary

We present the new version of the BIRA-IASB algorithm for the retrieval of H2CO columns from OMI and GOME-2A and B measurements. Validation results at seven stations in Europe, China and Africa confirm the capacity of the satellite measurements to resolve diurnal variations in H2CO columns. Furthermore, vertical profiles derived from MAX-DOAS measurements in Beijing and in Bujumbura are used for a more detailed validation exercise. Finally trends are estimated using 10 years of OMI observations.