Global optimal estimation retrievals of  atmospheric carbonyl sulfide over water  from IASI measurement spectra for 2018

Cartwright, Michael P.; Harrison, Jeremy J.; Moore, David P.; Pope, Richard J.; Chipperfield, Martyn P.; Wilson, Chris; Feng, Wuhu

doi:10.5194/acp-25-15913-2025

Articles | Volume 25, issue 22

https://doi.org/10.5194/acp-25-15913-2025

© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/acp-25-15913-2025

© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 25, issue 22

Research article

|

18 Nov 2025

Research article |

| 18 Nov 2025

Global optimal estimation retrievals of atmospheric carbonyl sulfide over water from IASI measurement spectra for 2018

Michael P. Cartwright, Jeremy J. Harrison, David P. Moore, Richard J. Pope, Martyn P. Chipperfield, Chris Wilson, and Wuhu Feng

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Sep 2025	1,144	24	6	1,174
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Cumulative views and downloads (calculated since 02 Apr 2025)

Month	HTML	PDF	XML	Total
Apr 2025	184	88	12	284
May 2025	58	68	6	132
Jun 2025	158	34	12	204
Jul 2025	94	38	12	144
Aug 2025	266	20	0	286
Sep 2025	1,144	24	6	1,174
Oct 2025	40	18	2	60
Nov 2025	307	63	13	383
Dec 2025	157	104	17	278
Jan 2026	146	95	20	261
Feb 2026	151	82	21	254
Mar 2026	173	107	13	293
Apr 2026	163	135	13	311
May 2026	87	59	7	153
Jun 2026	28	16	6	50
Jul 2026	47	35	12	94
Aug 2026	22	23	20	65

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Short summary

We use satellite measurements to estimate quantities of a gas called carbonyl sulfide (OCS) in the atmosphere. OCS is consumed during photosynthesis, much like carbon dioxide (CO₂). Our data is focused mostly over the global oceans for the year 2018, and we find it compares well with past satellite observations, ground-based measurements and modelled OCS. We hope to extend this measurement record and use it in data-driven tools in the future to better understand the carbon cycle globally.