Articles | Volume 19, issue 1
https://doi.org/10.5194/acp-19-663-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Special issue:
https://doi.org/10.5194/acp-19-663-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
17 Jan 2019
Research article |
| 17 Jan 2019
| 17 Jan 2019
Nocturnal low-level clouds in the atmospheric boundary layer over southern West Africa: an observation-based analysis of conditions and processes
Institute of Meteorology and Climate Research, Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany
Karmen Babić
Institute of Meteorology and Climate Research, Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany
Norbert Kalthoff
Institute of Meteorology and Climate Research, Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany
Fabienne Lohou
Laboratoire d'Aérologie, Université de Toulouse, CNRS, UPS, Toulouse, France
Marie Lothon
Laboratoire d'Aérologie, Université de Toulouse, CNRS, UPS, Toulouse, France
Cheikh Dione
Laboratoire d'Aérologie, Université de Toulouse, CNRS, UPS, Toulouse, France
Xabier Pedruzo-Bagazgoitia
Meteorology and Air Quality Group, Wageningen University and Research, Wageningen, the Netherlands
Hendrik Andersen
Institute of Meteorology and Climate Research, Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany
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- Impact of the Guinea coast upwelling on atmospheric dynamics, precipitation and pollutant transport over southern West Africa G. de Coëtlogon et al. 10.5194/acp-23-15507-2023
- CO2, CH4, and CO Emission Sources and Their Characteristics in the Lamto Ecological Reserve (Côte d’Ivoire) D. Tiemoko et al. 10.3390/atmos14101533
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- Sensitivity of low-level clouds and precipitation to anthropogenic aerosol emission in southern West Africa: a DACCIWA case study A. Deroubaix et al. 10.5194/acp-22-3251-2022
- The radiative impact of out-of-cloud aerosol hygroscopic growth during the summer monsoon in southern West Africa S. Haslett et al. 10.5194/acp-19-1505-2019
- Low‐Level Cloud Development and Diurnal Cycle in Southern West Africa During the DACCIWA Field Campaign: Case Study of Kumasi Supersite, Ghana J. Aryee et al. 10.1029/2020JD034028
- An evaluation of operational and research weather forecasts for southern West Africa using observations from the DACCIWA field campaign in June–July 2016 A. Kniffka et al. 10.1002/qj.3729
- The diurnal stratocumulus-to-cumulus transition over land in southern West Africa X. Pedruzo-Bagazgoitia et al. 10.5194/acp-20-2735-2020
- The impact of aerosols on stratiform clouds over southern West Africa: a large-eddy-simulation study L. Delbeke et al. 10.5194/acp-23-13329-2023
- Modelling atmospheric behaviour over southern West Africa using RegCM 4.7.1: Case assessment of relative humidity and zonal wind profiles based on the 2016 DACCIWA summertime field campaign J. Aryee et al. 10.1016/j.sciaf.2024.e02187
- A meteorological dataset of the West African monsoon during the 2016 DACCIWA campaign M. Kohler et al. 10.1038/s41597-022-01277-7
- Downward cloud venting of the central African biomass burning plume during the West Africa summer monsoon A. Dajuma et al. 10.5194/acp-20-5373-2020
- The vertical variability of black carbon observed in the atmospheric boundary layer during DACCIWA B. Altstädter et al. 10.5194/acp-20-7911-2020
- Role of the West African westerly jet in the seasonal and diurnal cycles of precipitation over West Africa W. Liu et al. 10.1007/s00382-019-05035-1
- What controls the formation of nocturnal low-level stratus clouds over southern West Africa during the monsoon season? K. Babić et al. 10.5194/acp-19-13489-2019
- Conceptual model of diurnal cycle of low-level stratiform clouds over southern West Africa F. Lohou et al. 10.5194/acp-20-2263-2020
- The influence of DACCIWA radiosonde data on the quality of ECMWF analyses and forecasts over southern West Africa R. van der Linden et al. 10.1002/qj.3763
- Aerosol influences on low-level clouds in the West African monsoon J. Taylor et al. 10.5194/acp-19-8503-2019
- Synoptic-scale controls of fog and low-cloud variability in the Namib Desert H. Andersen et al. 10.5194/acp-20-3415-2020
- Warm Rain in Southern West Africa: A Case Study at Savè I. Reinares Martínez et al. 10.3390/atmos11030298
- Identifying cloud, precipitation, windshear, and turbulence by deep analysis of the power spectrum of coherent Doppler wind lidar J. Yuan et al. 10.1364/OE.412809
- Daytime low-level clouds in West Africa – occurrence, associated drivers, and shortwave radiation attenuation D. Danso et al. 10.5194/esd-11-1133-2020
- The observed diurnal cycle of low-level stratus clouds over southern West Africa: a case study K. Babić et al. 10.5194/acp-19-1281-2019
Latest update: 05 Jul 2025
Short summary
This study deals with nocturnal stratiform low-level clouds that frequently form in the atmospheric boundary layer over southern West Africa. We use observational data from 11 nights to characterize the clouds and intranight variability of boundary layer conditions as well as to assess the physical processes relevant for cloud formation. We find that cooling is crucial to reach saturation and a large part of the cooling is related to horizontal advection of cool air from the Gulf of Guinea.
This study deals with nocturnal stratiform low-level clouds that frequently form in the...
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