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The bars represent the erosion/accretion along coasts, every 500m, over the period 1984-2016. Green bars indicate where shoreline accretion has occurred (natural accretion, land reclamation, nourishments). Red bars indicate erosive shorelines, based on a linear fit through shoreline positions. If you're zoomed in you can click on a profile to see a time series chart.
The results of the global analysis and methods can be found in: Luijendijk et al., 2018, Scientific Reports
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Green and blue colors represent areas where surface water changes occured during the last 30 years.
Green pixels show where surface water has been turned into land (accretion, land reclamation, droughts).
Blue pixels show where land has been changed into surface water (erosion, reservoir construction).
The results of the analysis are published in:
Donchyts et.al, 2016, Nature Climate Change