Articles | Volume 19, issue 21
Atmos. Chem. Phys., 19, 13489–13506, 2019
https://doi.org/10.5194/acp-19-13489-2019

Special issue: Results of the project "Dynamics–aerosol–chemistry–cloud...

Atmos. Chem. Phys., 19, 13489–13506, 2019
https://doi.org/10.5194/acp-19-13489-2019

Research article 05 Nov 2019

Research article | 05 Nov 2019

What controls the formation of nocturnal low-level stratus clouds over southern West Africa during the monsoon season?

Karmen Babić et al.

Data sets

DACCIWA field campaign, Savè super-site, UPS instrumentation S. Derrien, Y. Bezombes, B. Bret, O. Gabella, C. Jarnot, P. Medina, E. Piques, C. Delon, C. Dione, B. Campistron, P. Durand, C. Jambert, F. Lohou, M. Lothon, F. Pacifico, and Y. Meyerfeld https://doi.org/10.6096/dacciwa.1618

DACCIWA field campaign, Savè super-site, Cloud and precipitation J. Handwerker, S. Scheer, and T. Gamer https://doi.org/10.6096/dacciwa.1686

Radiosonde - All sites M. Maranan and A. Fink https://doi.org/10.6096/baobab-dacciwa.1656

DACCIWA field campaign, Savè super-site, Thermodynamic data sets A. Wieser, B. Adler, and B. Deny https://doi.org/10.6096/dacciwa.1659

DACCIWA field campaign, Savè super-site, Surface measurements M. Kohler, N. Kalthoff, J. Seringer, and S. Kraut https://doi.org/10.6096/dacciwa.1690

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Short summary
This study investigates differences in atmospheric conditions between nights with and without low-level stratus clouds (LLCs) over southern West Africa. We use high-quality observations collected during 2016 summer monsoon season and the ERA5 reanalysis data set. Our results show that the formation of LLCs depends on the interplay between the onset time and strength of the nocturnal low-level jet, horizontal cold-air advection, and the overall moisture level in the whole region.
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