Figure 2
Long-term sandy shoreline trend and influence of coastline sheltering. (a) Time series of spatially-averaged shoreline position around the mean \(\widetilde{S}\) for the entire sandy coast (thick grey) and corresponding box plot with the central horizontal red mark indicating the median, the bottom and top edges of the box indicating the 25th and 75th percentiles, respectively, and the whisker length indicating 1.5 times the interquantile range, which shows relatively well normally distribute \(\widetilde{S}\). (b) Same time series of spatially-averaged shoreline position around the mean \(\widetilde{S}\) for the entire sandy coast (thick grey), and focusing on significantly closed (\(D<10\) km, blue) and relatively open (\(D>50\) km, red) coasts. The corresponding long-term trends dS/dt are also shown (dashed lines) and quantified using the same color scheme. (c) Corresponding time series of SM SDS spatial coverage \(N_y\) (\(\%\), bars) and number of images used per yearly composite \(N_c\) with the dots and vertical bars representing the mean and ± standard deviation, respectively.
