Inferring drivers of tropical isoprene: competing  effects of emissions and chemistry

Yoon, James Young Suk; Wells, Kelley C.; Millet, Dylan B.; Frankenberg, Christian; Sanghavi, Suniti; Swann, Abigail L. S.; Thornton, Joel A.; Turner, Alexander J.

doi:10.5194/acp-26-4509-2026

Articles | Volume 26, issue 6

https://doi.org/10.5194/acp-26-4509-2026

© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/acp-26-4509-2026

© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 26, issue 6

Research article

|

02 Apr 2026

Research article |

| 02 Apr 2026

Inferring drivers of tropical isoprene: competing effects of emissions and chemistry

James Young Suk Yoon, Kelley C. Wells, Dylan B. Millet, Christian Frankenberg, Suniti Sanghavi, Abigail L. S. Swann, Joel A. Thornton, and Alexander J. Turner

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Cumulative views and downloads (calculated since 02 Dec 2025)

Month	HTML	PDF	XML	Total
Dec 2025	330	262	42	634
Jan 2026	198	96	18	312
Feb 2026	112	80	12	204
Mar 2026	120	130	2	252
Apr 2026	698	181	26	905
May 2026	337	79	9	425
Jun 2026	27	13	7	47
Jul 2026	142	45	20	207

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Short summary

Isoprene is a molecule emitted by trees that is oxidized in the atmosphere within hours. Much of the isoprene globally is emitted in the remote tropics, where we have few direct observations of isoprene. Here, we use new satellite retrievals of isoprene to infer drivers of tropical isoprene variability. Across three regions, isoprene column variability is controlled by different factors, namely changes in isoprene emissions or changes in natural nitrogen oxide sources, like soils and fires.