Mesoscale modulation of marine boundary layer water vapor isotopologues during EUREC<sup>4</sup>A

Galewsky, Joseph; Los, Sebastian A.

doi:10.5194/acp-26-9625-2026

Articles | Volume 26, issue 13

https://doi.org/10.5194/acp-26-9625-2026

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

https://doi.org/10.5194/acp-26-9625-2026

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

Articles | Volume 26, issue 13

Research article

|

08 Jul 2026

Research article |

| 08 Jul 2026

Mesoscale modulation of marine boundary layer water vapor isotopologues during EUREC⁴A

Joseph Galewsky and Sebastian A. Los

Data sets

M161 Continuous In-situ Water Vapor Isotopic Composition J. Galewsky and S. A. Los https://doi.org/10.25326/83

Joint dropsonde Observations of the Atmosphere in tropical North atlaNtic meso-scale Environments G. George https://doi.org/10.25326/221

EUREC4A-iso: Full collection of isotopic measurements in water vapor, precipitation, and seawater during EUREC4A A. Bailey et al. https://doi.org/10.25326/418

Short summary

This study shows that organized air motions over the tropical ocean can strongly shape the character of near-surface water vapor, even when overall moisture changes little. By combining ship and aircraft measurements with a simple physical model, we found that rising air can offset drying from mixing with air above, leaving a clear chemical fingerprint. These results help explain why clouds persist and improve how climate models represent them.

Mesoscale modulation of marine boundary layer water vapor isotopologues during EUREC4A

Data sets

Mesoscale modulation of marine boundary layer water vapor isotopologues during EUREC⁴A