Abstract
Assessing wave energy is of great importance to estimate the wave energy potential and site selection of wave energy converters. This paper aims to present the distributions of wave energy and long-term wave trend along the Chinese coastline. By using the high-accuracy wave data in ERA5 reanalysis for the 42-year period in 1979–2020, the spatiotemporal distributions of wave variations estimated by Theil-Sen Estimations and mean wave energy resources assessed by the implicit calculation equation are presented. Generally, annually mean wave heights increase in Yellow sea, East China Sea and South China Sea and decrease in Bohai sea. The wave energy assessment shows the great energy potential with annually mean wave energy density of major 6–12 kW/m. There is near Taiwan island and the northern parts of South China Sea that of higher energy density. The seasonal analysis reveals that winter and fall are more energetic with higher values around 20 kW/m. The wave power production in the selected locations was evaluated and provided based on the distribution of various wave states showing the East China Sea and South China Sea are the most suitable sea area for wave energy development.
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