AMMA-2050 NEC05274 AMMA-2050 is a collaborative project between scientists and policy makers in West Africa and Europe that will increase understanding of the regional climate in West Africa, and how it will change, as well as apply that knowledge to practical development questions. AMMA-2050 will use new computer simulations alongside conventional climate models and historical observations, to understand why the statistics of key climate extremes are changing, and what this tells us about climate and its extremes in future decades. The outputs from the climate models will be used to examine impacts on key sectors in West African society, notably water and agriculture. The key beneficiaries are in Senegal, where sustainable agricultural adaptation strategies will be identified along with the policy frameworks to support those options, and in Burkina Faso where the project will examine how climate changes are likely to affect flooding in the rapidly growing city of Ouagadougou. Research and development activity contributing to the UK’s strategy to address key development challenges.