Articles | Volume 25, issue 17
https://doi.org/10.5194/acp-25-9765-2025
https://doi.org/10.5194/acp-25-9765-2025
Research article
 | 
03 Sep 2025
Research article |  | 03 Sep 2025

Impact of convectively coupled tropical waves on the composition, vertical structure of the atmosphere, and tropical cyclogenesis in the region of Cabo Verde in September 2021 during the CADDIWA campaign

Tanguy Jonville, Maurus Borne, Cyrille Flamant, Juan Cuesta, Olivier Bock, Pierre Bosser, Christophe Lavaysse, Andreas Fink, and Peter Knippertz

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Cited articles

Agudelo, P. A., Hoyos, C. D., Curry, J. A., and Webster, P. J.: Probabilistic Discrimination between Large-Scale Environments of Intensifying and Decaying African Easterly Waves, Clim. Dynam., 36, 1379–1401, https://doi.org/10.1007/s00382-010-0851-x, 2011. a
Bock, O., Bosser, P., Flamant, C., Doerflinger, E., Jansen, F., Fages, R., Bony, S., and Schnitt, S.: Integrated water vapour observations in the Caribbean arc from a network of ground-based GNSS receivers during EUREC4A, Earth Syst. Sci. Data, 13, 2407–2436, https://doi.org/10.5194/essd-13-2407-2021, 2021. a, b
Borne, M., Knippertz, P., Weissmann, M., Witschas, B., Flamant, C., Rios-Berrios, R., and Veals, P.: Validation of Aeolus L2B products over the tropical Atlantic using radiosondes, Atmos. Meas. Tech., 17, 561–581, https://doi.org/10.5194/amt-17-561-2024, 2024. a
Bosser, P., Bock, O., Flamant, C., Bony, S., and Speich, S.: Integrated water vapour content retrievals from ship-borne GNSS receivers during EUREC4A, Earth Syst. Sci. Data, 13, 1499–1517, https://doi.org/10.5194/essd-13-1499-2021, 2021. a
Brammer, A. and Thorncroft, C. D.: Variability and Evolution of African Easterly Wave Structures and Their Relationship with Tropical Cyclogenesis over the Eastern Atlantic, Mon. Weather Rev., 143, 4975–4995, https://doi.org/10.1175/MWR-D-15-0106.1, 2015. a
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Short summary
Tropical waves structure the atmosphere. Four types of tropical waves (equatorial Rossby – ER, Kelvin, MRG-TD1, and MRG-TD2 – mixed Rossby gravity–tropical depressions) are studied using filters, satellite measurements, and in situ data from the Clouds–Atmosphere Dynamics–Dust Interaction in West Africa (CADDIWA) campaign held in September 2021 in Cabo Verde. ER waves impact temperature and humidity above 2500 m, MRG-TD1 around 3500 m, and MRG-TD2 around 2000 m. Interactions between these waves favor tropical cyclone formation.
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