Results of the project "Dynamics–aerosol–chemistry–cloud interactions in West Africa" (DACCIWA) (ACP/AMT inter-journal SI)(ACP/AMT inter-journal SI)
Results of the project "Dynamics–aerosol–chemistry–cloud interactions in West Africa" (DACCIWA) (ACP/AMT inter-journal SI)(ACP/AMT inter-journal SI)
Editor(s): M.J. Evans, D. Spracklen, S. Janicot, A. Mekonnen, and S. van den Heever Special issue jointly organized between Atmospheric Chemistry and Physics and Atmospheric Measurement Techniques
DACCIWA was a large multi-national (Germany: KIT, DLR; France: CNRS, Université Blaise Pascal Clemont-Ferrand II, Université Paris Didertot, Université Paul Sabatier Toulouse III, Université Pierre et Marie Curie; UK: Met Office, University of Manchester, University of Leeds, University of York, University of Reading; Switzerland: ETH Zürich; European: ECMWF; Ghana: KNUST; Nigeria: Obafemi Awolowo University) project funded by the European Union 7th Framework Programme to investigate atmospheric processes over West Africa, ranging from the impact of air pollution on atmospheric health to the future climate of the region. Arranged around seven interlinking work packages (WP1: boundary layer dynamics; WP2: air pollution and health; WP3: atmospheric chemistry; WP4: cloud-aerosol interactions; WP5: radiative processes; WP6: radiative processes; WP7: precipitative processes; WP7: monsoon processes), the project aims to improve our scientific understanding of this region and its resilience through increased scientific understanding of key atmospheric processes.

The summer of 2016 was the focal point for the experimental activities. Highly instrumented supersites at Savé in Benin and Kumai in Ghana provided multi-week analysis of a range of meteorological parameters and targeted cloud formation, low-level jet activation, and precipitation formation. Meteorological sondes were released at regular intervals and as special observing periods from a range of cities in the region. Air quality measurements in the cities of Cotonou, Abidjan, and Akouedou provided information on pollution loads in regional cities and emission factors for emission estimates. Three research aircraft (DLR Falcon, BAS Twin Otter, SAPHIRE ATR43) were based in Lomé, Togo, for a month to make a range of observations over the coastal cities of Ivory Coast, Ghana, Togo, and Benin and inland over the rainforest, agricultural, and residential areas. The aircraft were equipped to measure a range of gas, aerosol, and meteorological parameters. A more complete list of payloads, observations collected, flight paths flown, etc. is attached as a PDF, which forms part of a paper currently being reviewed by BAMS that describes the summer campaign.

The intention of the scale issue is to bring together all of this activity into a single area to allow synergies between the papers to be more evident and to help advertise the data and science generated by the DACCIWA project in this data-poor area to the wider community.

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10 Feb 2021
Breakup of nocturnal low-level stratiform clouds during the southern West African monsoon season
Maurin Zouzoua, Fabienne Lohou, Paul Assamoi, Marie Lothon, Véronique Yoboue, Cheikh Dione, Norbert Kalthoff, Bianca Adler, Karmen Babić, Xabier Pedruzo-Bagazgoitia, and Solène Derrien
Atmos. Chem. Phys., 21, 2027–2051, https://doi.org/10.5194/acp-21-2027-2021,https://doi.org/10.5194/acp-21-2027-2021, 2021
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10 Feb 2021
PM2.5 surface concentrations in southern West African urban areas based on sun photometer and satellite observations
Jean-François Léon, Aristide Barthélémy Akpo, Mouhamadou Bedou, Julien Djossou, Marleine Bodjrenou, Véronique Yoboué, and Cathy Liousse
Atmos. Chem. Phys., 21, 1815–1834, https://doi.org/10.5194/acp-21-1815-2021,https://doi.org/10.5194/acp-21-1815-2021, 2021
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04 Jan 2021
The potential of increasing man-made air pollution to reduce rainfall over southern West Africa
Gregor Pante, Peter Knippertz, Andreas H. Fink, and Anke Kniffka
Atmos. Chem. Phys., 21, 35–55, https://doi.org/10.5194/acp-21-35-2021,https://doi.org/10.5194/acp-21-35-2021, 2021
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08 Jul 2020
The vertical variability of black carbon observed in the atmospheric boundary layer during DACCIWA
Barbara Altstädter, Konrad Deetz, Bernhard Vogel, Karmen Babić, Cheikh Dione, Federica Pacifico, Corinne Jambert, Friederike Ebus, Konrad Bärfuss, Falk Pätzold, Astrid Lampert, Bianca Adler, Norbert Kalthoff, and Fabienne Lohou
Atmos. Chem. Phys., 20, 7911–7928, https://doi.org/10.5194/acp-20-7911-2020,https://doi.org/10.5194/acp-20-7911-2020, 2020
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07 May 2020
Downward cloud venting of the central African biomass burning plume during the West Africa summer monsoon
Alima Dajuma, Kehinde O. Ogunjobi, Heike Vogel, Peter Knippertz, Siélé Silué, Evelyne Touré N'Datchoh, Véronique Yoboué, and Bernhard Vogel
Atmos. Chem. Phys., 20, 5373–5390, https://doi.org/10.5194/acp-20-5373-2020,https://doi.org/10.5194/acp-20-5373-2020, 2020
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06 May 2020
Physico-chemical characterization of urban aerosols from specific combustion sources in West Africa at Abidjan in Côte d'Ivoire and Cotonou in Benin in the frame of the DACCIWA program
Aka Jacques Adon, Catherine Liousse, Elhadji Thierno Doumbia, Armelle Baeza-Squiban, Hélène Cachier, Jean-Francois Léon, Véronique Yoboué, Aristique Barthel Akpo, Corinne Galy-Lacaux, Benjamin Guinot, Cyril Zouiten, Hongmei Xu, Eric Gardrat, and Sekou Keita
Atmos. Chem. Phys., 20, 5327–5354, https://doi.org/10.5194/acp-20-5327-2020,https://doi.org/10.5194/acp-20-5327-2020, 2020
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22 Apr 2020
Overview of aerosol optical properties over southern West Africa from DACCIWA aircraft measurements
Cyrielle Denjean, Thierry Bourrianne, Frederic Burnet, Marc Mallet, Nicolas Maury, Aurélie Colomb, Pamela Dominutti, Joel Brito, Régis Dupuy, Karine Sellegri, Alfons Schwarzenboeck, Cyrille Flamant, and Peter Knippertz
Atmos. Chem. Phys., 20, 4735–4756, https://doi.org/10.5194/acp-20-4735-2020,https://doi.org/10.5194/acp-20-4735-2020, 2020
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05 Mar 2020
The diurnal stratocumulus-to-cumulus transition over land in southern West Africa
Xabier Pedruzo-Bagazgoitia, Stephan R. de Roode, Bianca Adler, Karmen Babić, Cheikh Dione, Norbert Kalthoff, Fabienne Lohou, Marie Lothon, and Jordi Vilà-Guerau de Arellano
Atmos. Chem. Phys., 20, 2735–2754, https://doi.org/10.5194/acp-20-2735-2020,https://doi.org/10.5194/acp-20-2735-2020, 2020
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26 Feb 2020
Conceptual model of diurnal cycle of low-level stratiform clouds over southern West Africa
Fabienne Lohou, Norbert Kalthoff, Bianca Adler, Karmen Babić, Cheikh Dione, Marie Lothon, Xabier Pedruzo-Bagazgoitia, and Maurin Zouzoua
Atmos. Chem. Phys., 20, 2263–2275, https://doi.org/10.5194/acp-20-2263-2020,https://doi.org/10.5194/acp-20-2263-2020, 2020
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16 Dec 2019
Remote biomass burning dominates southern West African air pollution during the monsoon
Sophie L. Haslett, Jonathan W. Taylor, Mathew Evans, Eleanor Morris, Bernhard Vogel, Alima Dajuma, Joel Brito, Anneke M. Batenburg, Stephan Borrmann, Johannes Schneider, Christiane Schulz, Cyrielle Denjean, Thierry Bourrianne, Peter Knippertz, Régis Dupuy, Alfons Schwarzenböck, Daniel Sauer, Cyrille Flamant, James Dorsey, Ian Crawford, and Hugh Coe
Atmos. Chem. Phys., 19, 15217–15234, https://doi.org/10.5194/acp-19-15217-2019,https://doi.org/10.5194/acp-19-15217-2019, 2019
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04 Dec 2019
The role of aerosol–radiation–cloud interactions in linking anthropogenic pollution over southern west Africa and dust emission over the Sahara
Laurent Menut, Paolo Tuccella, Cyrille Flamant, Adrien Deroubaix, and Marco Gaetani
Atmos. Chem. Phys., 19, 14657–14676, https://doi.org/10.5194/acp-19-14657-2019,https://doi.org/10.5194/acp-19-14657-2019, 2019
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05 Nov 2019
What controls the formation of nocturnal low-level stratus clouds over southern West Africa during the monsoon season?
Karmen Babić, Norbert Kalthoff, Bianca Adler, Julian F. Quinting, Fabienne Lohou, Cheikh Dione, and Marie Lothon
Atmos. Chem. Phys., 19, 13489–13506, https://doi.org/10.5194/acp-19-13489-2019,https://doi.org/10.5194/acp-19-13489-2019, 2019
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24 Sep 2019
Anthropogenic VOCs in Abidjan, southern West Africa: from source quantification to atmospheric impacts
Pamela Dominutti, Sekou Keita, Julien Bahino, Aurélie Colomb, Cathy Liousse, Véronique Yoboué, Corinne Galy-Lacaux, Eleanor Morris, Laëtitia Bouvier, Stéphane Sauvage, and Agnès Borbon
Atmos. Chem. Phys., 19, 11721–11741, https://doi.org/10.5194/acp-19-11721-2019,https://doi.org/10.5194/acp-19-11721-2019, 2019
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10 Sep 2019
Local air pollution from oil rig emissions observed during the airborne DACCIWA campaign
Vanessa Brocchi, Gisèle Krysztofiak, Adrien Deroubaix, Greta Stratmann, Daniel Sauer, Hans Schlager, Konrad Deetz, Guillaume Dayma, Claude Robert, Stéphane Chevrier, and Valéry Catoire
Atmos. Chem. Phys., 19, 11401–11411, https://doi.org/10.5194/acp-19-11401-2019,https://doi.org/10.5194/acp-19-11401-2019, 2019
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16 Jul 2019
Low-level stratiform clouds and dynamical features observed within the southern West African monsoon
Cheikh Dione, Fabienne Lohou, Marie Lothon, Bianca Adler, Karmen Babić, Norbert Kalthoff, Xabier Pedruzo-Bagazgoitia, Yannick Bezombes, and Omar Gabella
Atmos. Chem. Phys., 19, 8979–8997, https://doi.org/10.5194/acp-19-8979-2019,https://doi.org/10.5194/acp-19-8979-2019, 2019
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04 Jul 2019
Aerosol influences on low-level clouds in the West African monsoon
Jonathan W. Taylor, Sophie L. Haslett, Keith Bower, Michael Flynn, Ian Crawford, James Dorsey, Tom Choularton, Paul J. Connolly, Valerian Hahn, Christiane Voigt, Daniel Sauer, Régis Dupuy, Joel Brito, Alfons Schwarzenboeck, Thierry Bourriane, Cyrielle Denjean, Phil Rosenberg, Cyrille Flamant, James D. Lee, Adam R. Vaughan, Peter G. Hill, Barbara Brooks, Valéry Catoire, Peter Knippertz, and Hugh Coe
Atmos. Chem. Phys., 19, 8503–8522, https://doi.org/10.5194/acp-19-8503-2019,https://doi.org/10.5194/acp-19-8503-2019, 2019
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20 May 2019
Personal exposure to PM2.5 emitted from typical anthropogenic sources in southern West Africa: chemical characteristics and associated health risks
Hongmei Xu, Jean-François Léon, Cathy Liousse, Benjamin Guinot, Véronique Yoboué, Aristide Barthélémy Akpo, Jacques Adon, Kin Fai Ho, Steven Sai Hang Ho, Lijuan Li, Eric Gardrat, Zhenxing Shen, and Junji Cao
Atmos. Chem. Phys., 19, 6637–6657, https://doi.org/10.5194/acp-19-6637-2019,https://doi.org/10.5194/acp-19-6637-2019, 2019
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28 Feb 2019
Evaluation of Windsond S1H2 performance in Kumasi during the 2016 DACCIWA field campaign
Geoffrey Elie Quentin Bessardon, Kwabena Fosu-Amankwah, Anders Petersson, and Barbara Jane Brooks
Atmos. Meas. Tech., 12, 1311–1324, https://doi.org/10.5194/amt-12-1311-2019,https://doi.org/10.5194/amt-12-1311-2019, 2019
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21 Feb 2019
Measurements of nitric oxide and ammonia soil fluxes from a wet savanna ecosystem site in West Africa during the DACCIWA field campaign
Federica Pacifico, Claire Delon, Corinne Jambert, Pierre Durand, Eleanor Morris, Mat J. Evans, Fabienne Lohou, Solène Derrien, Venance H. E. Donnou, Arnaud V. Houeto, Irene Reinares Martínez, and Pierre-Etienne Brilouet
Atmos. Chem. Phys., 19, 2299–2325, https://doi.org/10.5194/acp-19-2299-2019,https://doi.org/10.5194/acp-19-2299-2019, 2019
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07 Feb 2019
The role of low-level clouds in the West African monsoon system
Anke Kniffka, Peter Knippertz, and Andreas H. Fink
Atmos. Chem. Phys., 19, 1623–1647, https://doi.org/10.5194/acp-19-1623-2019,https://doi.org/10.5194/acp-19-1623-2019, 2019
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05 Feb 2019
The radiative impact of out-of-cloud aerosol hygroscopic growth during the summer monsoon in southern West Africa
Sophie L. Haslett, Jonathan W. Taylor, Konrad Deetz, Bernhard Vogel, Karmen Babić, Norbert Kalthoff, Andreas Wieser, Cheikh Dione, Fabienne Lohou, Joel Brito, Régis Dupuy, Alfons Schwarzenboeck, Paul Zieger, and Hugh Coe
Atmos. Chem. Phys., 19, 1505–1520, https://doi.org/10.5194/acp-19-1505-2019,https://doi.org/10.5194/acp-19-1505-2019, 2019
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31 Jan 2019
The observed diurnal cycle of low-level stratus clouds over southern West Africa: a case study
Karmen Babić, Bianca Adler, Norbert Kalthoff, Hendrik Andersen, Cheikh Dione, Fabienne Lohou, Marie Lothon, and Xabier Pedruzo-Bagazgoitia
Atmos. Chem. Phys., 19, 1281–1299, https://doi.org/10.5194/acp-19-1281-2019,https://doi.org/10.5194/acp-19-1281-2019, 2019
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17 Jan 2019
Nocturnal low-level clouds in the atmospheric boundary layer over southern West Africa: an observation-based analysis of conditions and processes
Bianca Adler, Karmen Babić, Norbert Kalthoff, Fabienne Lohou, Marie Lothon, Cheikh Dione, Xabier Pedruzo-Bagazgoitia, and Hendrik Andersen
Atmos. Chem. Phys., 19, 663–681, https://doi.org/10.5194/acp-19-663-2019,https://doi.org/10.5194/acp-19-663-2019, 2019
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14 Jan 2019
Diurnal cycle of coastal anthropogenic pollutant transport over southern West Africa during the DACCIWA campaign
Adrien Deroubaix, Laurent Menut, Cyrille Flamant, Joel Brito, Cyrielle Denjean, Volker Dreiling, Andreas Fink, Corinne Jambert, Norbert Kalthoff, Peter Knippertz, Russ Ladkin, Sylvain Mailler, Marlon Maranan, Federica Pacifico, Bruno Piguet, Guillaume Siour, and Solène Turquety
Atmos. Chem. Phys., 19, 473–497, https://doi.org/10.5194/acp-19-473-2019,https://doi.org/10.5194/acp-19-473-2019, 2019
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09 Oct 2018
The role of droplet sedimentation in the evolution of low-level clouds over southern West Africa
Christopher Dearden, Adrian Hill, Hugh Coe, and Tom Choularton
Atmos. Chem. Phys., 18, 14253–14269, https://doi.org/10.5194/acp-18-14253-2018,https://doi.org/10.5194/acp-18-14253-2018, 2018
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09 Oct 2018
Aerosol liquid water content in the moist southern West African monsoon layer and its radiative impact
Konrad Deetz, Heike Vogel, Sophie Haslett, Peter Knippertz, Hugh Coe, and Bernhard Vogel
Atmos. Chem. Phys., 18, 14271–14295, https://doi.org/10.5194/acp-18-14271-2018,https://doi.org/10.5194/acp-18-14271-2018, 2018
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27 Aug 2018
Aerosol distribution in the northern Gulf of Guinea: local anthropogenic sources, long-range transport, and the role of coastal shallow circulations
Cyrille Flamant, Adrien Deroubaix, Patrick Chazette, Joel Brito, Marco Gaetani, Peter Knippertz, Andreas H. Fink, Gaëlle de Coetlogon, Laurent Menut, Aurélie Colomb, Cyrielle Denjean, Rémi Meynadier, Philip Rosenberg, Regis Dupuy, Pamela Dominutti, Jonathan Duplissy, Thierry Bourrianne, Alfons Schwarzenboeck, Michel Ramonet, and Julien Totems
Atmos. Chem. Phys., 18, 12363–12389, https://doi.org/10.5194/acp-18-12363-2018,https://doi.org/10.5194/acp-18-12363-2018, 2018
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11 Jul 2018
Numerical simulations of aerosol radiative effects and their impact on clouds and atmospheric dynamics over southern West Africa
Konrad Deetz, Heike Vogel, Peter Knippertz, Bianca Adler, Jonathan Taylor, Hugh Coe, Keith Bower, Sophie Haslett, Michael Flynn, James Dorsey, Ian Crawford, Christoph Kottmeier, and Bernhard Vogel
Atmos. Chem. Phys., 18, 9767–9788, https://doi.org/10.5194/acp-18-9767-2018,https://doi.org/10.5194/acp-18-9767-2018, 2018
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01 Jun 2018
Particle and VOC emission factor measurements for anthropogenic sources in West Africa
Sekou Keita, Cathy Liousse, Véronique Yoboué, Pamela Dominutti, Benjamin Guinot, Eric-Michel Assamoi, Agnès Borbon, Sophie L. Haslett, Laetitia Bouvier, Aurélie Colomb, Hugh Coe, Aristide Akpo, Jacques Adon, Julien Bahino, Madina Doumbia, Julien Djossou, Corinne Galy-Lacaux, Eric Gardrat, Sylvain Gnamien, Jean F. Léon, Money Ossohou, E. Touré N'Datchoh, and Laurent Roblou
Atmos. Chem. Phys., 18, 7691–7708, https://doi.org/10.5194/acp-18-7691-2018,https://doi.org/10.5194/acp-18-7691-2018, 2018
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09 May 2018
LES study of the impact of moist thermals on the oxidative capacity of the atmosphere in southern West Africa
Fabien Brosse, Maud Leriche, Céline Mari, and Fleur Couvreux
Atmos. Chem. Phys., 18, 6601–6624, https://doi.org/10.5194/acp-18-6601-2018,https://doi.org/10.5194/acp-18-6601-2018, 2018
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04 May 2018
Mass concentration, optical depth and carbon composition of particulate matter in the major southern West African cities of Cotonou (Benin) and Abidjan (Côte d'Ivoire)
Julien Djossou, Jean-François Léon, Aristide Barthélemy Akpo, Cathy Liousse, Véronique Yoboué, Mouhamadou Bedou, Marleine Bodjrenou, Christelle Chiron, Corinne Galy-Lacaux, Eric Gardrat, Marcellin Abbey, Sékou Keita, Julien Bahino, Evelyne Touré N'Datchoh, Money Ossohou, and Cossi Norbert Awanou
Atmos. Chem. Phys., 18, 6275–6291, https://doi.org/10.5194/acp-18-6275-2018,https://doi.org/10.5194/acp-18-6275-2018, 2018
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17 Apr 2018
A pilot study of gaseous pollutants' measurement (NO2, SO2, NH3, HNO3 and O3) in Abidjan, Côte d'Ivoire: contribution to an overview of gaseous pollution in African cities
Julien Bahino, Véronique Yoboué, Corinne Galy-Lacaux, Marcellin Adon, Aristide Akpo, Sékou Keita, Cathy Liousse, Eric Gardrat, Christelle Chiron, Money Ossohou, Sylvain Gnamien, and Julien Djossou
Atmos. Chem. Phys., 18, 5173–5198, https://doi.org/10.5194/acp-18-5173-2018,https://doi.org/10.5194/acp-18-5173-2018, 2018
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01 Mar 2018
An overview of the diurnal cycle of the atmospheric boundary layer during the West African monsoon season: results from the 2016 observational campaign
Norbert Kalthoff, Fabienne Lohou, Barbara Brooks, Gbenga Jegede, Bianca Adler, Karmen Babić, Cheikh Dione, Adewale Ajao, Leonard K. Amekudzi, Jeffrey N. A. Aryee, Muritala Ayoola, Geoffrey Bessardon, Sylvester K. Danuor, Jan Handwerker, Martin Kohler, Marie Lothon, Xabier Pedruzo-Bagazgoitia, Victoria Smith, Lukman Sunmonu, Andreas Wieser, Andreas H. Fink, and Peter Knippertz
Atmos. Chem. Phys., 18, 2913–2928, https://doi.org/10.5194/acp-18-2913-2018,https://doi.org/10.5194/acp-18-2913-2018, 2018
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23 Feb 2018
Impact of biomass burning on pollutant surface concentrations in megacities of the Gulf of Guinea
Laurent Menut, Cyrille Flamant, Solène Turquety, Adrien Deroubaix, Patrick Chazette, and Rémi Meynadier
Atmos. Chem. Phys., 18, 2687–2707, https://doi.org/10.5194/acp-18-2687-2018,https://doi.org/10.5194/acp-18-2687-2018, 2018
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22 Jan 2018
Assessing the role of anthropogenic and biogenic sources on PM1 over southern West Africa using aircraft measurements
Joel Brito, Evelyn Freney, Pamela Dominutti, Agnes Borbon, Sophie L. Haslett, Anneke M. Batenburg, Aurelie Colomb, Regis Dupuy, Cyrielle Denjean, Frederic Burnet, Thierry Bourriane, Adrien Deroubaix, Karine Sellegri, Stephan Borrmann, Hugh Coe, Cyrille Flamant, Peter Knippertz, and Alfons Schwarzenboeck
Atmos. Chem. Phys., 18, 757–772, https://doi.org/10.5194/acp-18-757-2018,https://doi.org/10.5194/acp-18-757-2018, 2018
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16 Jan 2018
Interactions of atmospheric gases and aerosols with the monsoon dynamics over the Sudano-Guinean region during AMMA
Adrien Deroubaix, Cyrille Flamant, Laurent Menut, Guillaume Siour, Sylvain Mailler, Solène Turquety, Régis Briant, Dmitry Khvorostyanov, and Suzanne Crumeyrolle
Atmos. Chem. Phys., 18, 445–465, https://doi.org/10.5194/acp-18-445-2018,https://doi.org/10.5194/acp-18-445-2018, 2018
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