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July 10, 2026Atmospheric chemistry and physicsOpen Access

Mesoscale modulation of marine boundary layer water vapor isotopologues during EUREC 4 A

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Authors

JGJoseph GalewskySLSebastian A. Los

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Overview

Randomized trial analyzes water vapor isotopologue modulation in marine boundary layers, suggesting influences on humidity pathways.

Key Points

  • This research examines how mesoscale circulations affect moisture and isotopic content in marine boundary layers.
  • Analyzed water vapor isotopologue measurements during the EUREC4A campaign
  • Utilized regression analyses to assess the relationship between vertical velocity and isotopic depletion
  • Employed a mixed-layer model to simulate below-cloud rain evaporation effects
  • Mesoscale ascent of approximately 0.7 mm s−1 can counteract the isotopic depletion caused by 1 mm s−1 of entrainment
  • Strong correlations found between vertical velocity and δD (r≈0.52) and mixing ratio (r≈0.39) within ±200 m of the subcloud layer top
  • Model suggests below-cloud rain evaporation reorganizes moisture pathways without significant total water vapor changes

Cite This Study

Galewsky et al. (2026) studied this question.

synapsesocial.com/papers/6a508d096eeac72a437a0c34https://doi.org/10.5194/acp-26-9625-2026
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