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South African Journal of Science

On-line version ISSN 1996-7489
Print version ISSN 0038-2353


MATHER, A.A.. Linear and nonlinear sea-level changes at Durban, South Africa. S. Afr. j. sci. [online]. 2007, vol.103, n.11-12, pp.509-512. ISSN 1996-7489.

The tide record between 1970 and 2003 for Durban, South Africa, is analysed to determine the extent of recent linear and nonlinear sea-level trends in the light of predicted global sea-level rise. Given the stability of the adjacent land mass, Durban is ideally suited to test global sea-level change. The linear trends of monthly mean sea level revealed a sea-level rise of 2.7 ± 0.05 mm/yr and the yearly mean sea-level trend revealed a rise of 2.4 ± 0.29 mm/yr. Nonlinear trends varied between -1 mm and +8 mm/yr. These findings are similar to recently published results of global sea-level rise calculations over the last ten years derived from worldwide tide gauge and TOPEX/Poseidon altimeter measurements, which range between 2.4 and 3.2 mm/yr.

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