Coastal West Africa and Climate Change Vulnerability to Impacts and Institutional Needs

These areas will experience new and challenging stresses associated with climate change, requiring planning and international cooperation to adapt to changing conditions. Urban growth, a growing demand for resources, and the challenges of carrying out and enforcing land-use planning will likely dominate development concerns along the coast in the future. Understanding the current state of both the natural ecosystems and inhabited areas, as well as possible future climate scenarios, can provide direction for both development and planning. The main impacts of climate change on the physical coast include rising sea levels and a higher incidence of extreme rainfall events, both of which can lead to increased flooding. Coastal erosion and loss of wetlands are significant concerns, with negative impacts on fisheries and croplands, and increasing risks to infrastructure and populations in urbanized areas. Rising sea levels will likely increase coastal erosion, and significant gaps exist in knowledge about the drivers of erosion and the coastal assets that might be affected. A new littoral observation network in West Africa should help advance understanding of this vulnerability. Wetlands, including mangroves and deltas, are threatened by rising sea levels, as well as by human encroachment. Better modeling of these ecosystems is needed, particularly for the river deltas, to understand how climate change will interact with growing populations. Coastal West Africa's croplands are among the most productive in the region, with crop productivity expected to increase with technological change. However, better modeling of tree crops, such as cocoa, coffee, rubber, and oil palm, is needed to understand how this economically important sector will respond to climate change. Each urban and peri-urban area has unique physical and socioeconomic characteristics that govern vulnerability to climate change. In general, however, the infrastructure and high population densities of urban areas on low-lying coastal areas put them at high levels of risk. While urban areas generally have more resources to use for adaptation, these resources may be inadequate if change occurs too rapidly, or if large infrastructures are threatened. Currently, no single institution in West Africa has all the capacities nor the mandate needed to address the range of issues associated with climate change along the coast. Existing institutions will need to work in collaboration across national boundaries to share knowledge and experience. The relationships between institutions that generate information and those that influence policy and its implementation are of particular importance. For example, global institutions are monitoring West African oceans, but these activities have yet to result in increased research or information on climate impacts on the coastal zone at either the national or regional level. At the national level, improvements in planning have been limited to a few isolated pilot projects. Within national governments, climate change is typically assigned to the environment ministry, which can struggle to influence the wide range of sectors with coastal interests. A few priority areas for engagement on coastal zone adaptation include large urban centers, mangrove areas, coastal fisheries, and climate information and services. Future research could focus on urban vulnerability assessments and processes to integrate climate change into urban planning to help reduce future risk to infrastructure and populations. Research into the possible effects on mangroves could fit into the existing Mangrove Charter and National Action Plan for West Africa. Regional collaboration could be achieved through the Food and Agriculture Organization or the Abidjan Convention Secretariat. Climate services need to be more fully developed in West Africa, especially in coastal areas, with some early warning systems for disasters existing mainly in the more developed countries. The climate impacts on particular fish species and ecosystems need to be better understood, with existing impact assessments providing some useful insights.