Study area and in situ data
In POLCA, two cities are investigated : Dakar and Bamako
Among the Key Sustainability Challenges in the both : Air quality
Air quality in Dakar is poor mostly due to heavy traffic congestion and use of aged and diesel motorized vehicles (read more). Climatological characteristics are driven by marine conditions due to the city location within a peninsula.
Air quality is Bamako is a crucial problem according the public transportation i.e motorcycles using motorcycles with poor-quality fuel, Sotrama (old small buses) ; and the aged fleet of other vehicles. Moreover, the atmosphere of Bamako often presents a high charge of Saharan dust coming with the Harmattan fuxes or resuspended by local conditions.
Finally, the geographical configuration of the city within a basin creates air masses stagnation leading to strong air pollution.
Dakar is the largest city and capital of Senegal in West Africa. Located on the Cape Verde Peninsula on the Atlantic coast (14°40’20" N, and 17°25’22" W at an altitude of 104m), Dakar is a major regional port serving transatlantic and European trade. Approximately 2.5 million people (25% of the national population) live in an area of 550 square kilometres (0.28% of the national territory) with an average population density of 4,122/km2. The total annual rainfall amount is of 380 mm. Two (...)
Bamako, population 1,690,471 (2006), is the capital and largest city of Mali, and currently estimated to be the fastest growing city in Africa (6th fastest in the world). Located on the Niger River in the southwestern part of the country (12°39’N and 8°04’W at an altitude of 380m), the city is within a basin surrounded by hills. Bamako is the nation’s administrative center, with a river port located in nearby Koulikoro. The climate is Sahelian. The total annual rainfall amount is of 878 mm, (...)