Marine and Coastal Hazards

The IOC aids and advises policy makers and managers in the reduction of risks from tsunamis, storm surges, Harmful Algal Blooms (HABs) and other coastal hazards by focusing on implementing adaptation measures to strengthen the resilience of vulnerable coastal communities, their infrastructure and service-providing ecosystems.

The African Sea Level Network

© SCOR; Map of the African Sea Level Network

The IOC Sub-Commission in Africa focuses on sea level stations as an early warning system. There are currently more than 40 operational sea level stations along the African coastline, installed by national organisations, the Intergovernmental Oceanographic Commission, the University of Hawaii Sea Level Centre (USA), and other partners.

Global Navigations Satellite Systems (GNSS) receivers have been installed at the sea level stations in Takoradi (Ghana), and Inhambane and Pemba (Mozambique) to provide the connection between the horizontal and the vertical datum at these locations. The tidal and GNSS observations together allows one to monitor crustal motions at the tide gauge locations in order to derive absolute or climate related signals in mean sea level from the tide records.

IOC-Africa aims at expanding the network, so as to establish a comprehensive network of evenly spaced tide gauges, providing data near real-time, and addressing the key oceanographic phenomena along the African coastline.

Information on the network (equipment types and location, reports, trainings etc) is available on the African Sea Level Network website, while the data from the stations can be accessed near-real time online.  

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