Dynamics-aerosol-chemistry-cloud interactions in West Africa (DACCIWA)

Funder:
European Commission
Project Team:
-
Partners:
-
Timescales:
2013-2018
Country / Region:
Ghana, , Ivory Coast, , Togo, , Benin, , NIgeria
Key Contact:
Peter Knippertz, KIH, Germany
Keywords:
Environment, climate research, West Africa, air pollution, health, agriculture, ecosystems, policy making, field campaign, clouds, aerosols, ozone, boundary layer, radiation, precipitation, monsoon
Topic:
Water,Social Wellbeing
Status:
Current
air
air quality
air pollution
climate
adaption
emissions
health
clouds
agricultural
ecosystems
aerosols
ozone
boundry layer
radiation
Precipitation
monsoon

DACCIWA aims to quantify the influence of human-caused and natural emissions on air quality, clouds and rainfall over southern regions of West Africa and assess their impact on human and ecosystem health and agricultural productivity.

Massive economic and population growth and urbanisation are expected to lead to a tripling of anthropogenic emissions in southern West Africa (SWA) between 2000 and 2030, the impacts of which on human health, ecosystems, food security and the regional climate are largely unknown.

An assessment of these impacts is complicated by:

  1. a superposition with effects of global climate change,
  2. the strong dependence of SWA on the sensitive West African monsoon, 
  3. incomplete scientific understanding of interactions between emissions, clouds, radiation, precipitation and regional circulations
  4. by a lack of observations to advance our understanding and improve predictions.

DACCIWA will also quantify the coupling between aerosols and clouds and identify controls on the formation and persistence of low-level clouds. Further it will identify meteorological controls on precipitation, focusing the transition from stratus to convective clouds and the forcing from weather systems. DACCIWA will quantify the two way cloud and aerosol impacts on the radiation and energy budgets from the cloud scale to the scale of the West African monsoon circulation.

State-of- the-art meteorological, chemistry and air-quality models, satellite retrievals of clouds, precipitation, aerosols and radiation will be assessed in close collaboration with operational centres and research findings will be communicated to policy-makers, scientists, operational centres, students, and general public using a graded communication strategy.

Research team/partners: Karlsruhe Institute of Technology (KIT), Germany; University of Reading, University of Leeds, Manchester University, Met Office, UK; Centre National de la Recherche Scientifique (CNRS), France; Deutsches Zentrum für Luft- und Raumfahrt (DLR), Germany; Eidgenössische Technische Hochschule Zürich (ETHZ), Switzerland; European Centre for Medium-Range Weather Forecasts (ECMWF), International; Kwame Nkrumah University of Science and Technology (KNUST), Ghana; Obafemi Awolowo University (OAU), Nigeria

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