Failed cyclogenesis of a mesoscale convective  system near Cabo Verde: the role of the Saharan  trade wind layer among other inhibiting factors  observed during the CADDIWA field campaign

Feger, Guillaume; Chaboureau, Jean-Pierre; Dauhut, Thibaut; Delanoë, Julien; Coutris, Pierre

doi:https://doi.org/10.5194/acp-25-7447-2025

Articles | Volume 25, issue 13

https://doi.org/10.5194/acp-25-7447-2025

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

Special issue:

The Joint Aeolus Tropical Atlantic Campaign (JATAC) (AMT/ACP...

https://doi.org/10.5194/acp-25-7447-2025

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

Articles | Volume 25, issue 13

Research article

|

15 Jul 2025

Research article |

| 15 Jul 2025

Failed cyclogenesis of a mesoscale convective system near Cabo Verde: the role of the Saharan trade wind layer among other inhibiting factors observed during the CADDIWA field campaign

Guillaume Feger, Jean-Pierre Chaboureau, Thibaut Dauhut, Julien Delanoë, and Pierre Coutris

Data sets

FSSP Pierre Coutris et al. https://doi.org/10.25326/653

UHSAS Pierre Coutris et al. https://doi.org/10.25326/652

2DS Pierre Coutris et al. https://doi.org/10.25326/651

drospondes C. Flamant https://doi.org/10.25326/375

CADDIWA-2021_RALI_radar_lidar_TC J. Delanoë https://rali.aeris-data.fr/catalogue/?uuid=1f4cb552-17f4-45e9-8ef7-fa980f7ff0f2

CADDIWA-2021_RASTA_WIND_L2 J. Delanoë https://rali.aeris-data.fr/catalogue/?uuid=39b9e681-1658-4083-8b74-27b6292fbbb8

Short summary

Saharan air at the trade wind layer, cold pools, and dry upper troposphere has these three main factors inhibiting the cyclogenesis of the Pierre Henri mesoscale convective system. The findings were obtained through observations made during two flights of the Clouds-Atmospheric Dynamics-Dust Interactions in West Africa (CADDIWA) campaign and a convection-permitting simulation run with the Meso-NH model. They provide new insights into the complex dynamics of cyclogenesis in the Cabo Verde region and challenge the existing model of the Saharan Air Layer (SAL).