Image 05 TU Delft
![](https://mb.cision.com/Public/21604/3678751/bf6f7e6aef4a3fb0_800x800ar.jpg)
Photographer: © TU Delft
Top panel: Infragravity wave height measured by the Signature1000 ADCPs at 14 m (blue) and 8 m (red) depth during the five-month campaign. The instrument at 8 m depth recorded higher infragravity wave heights than the instrument at 14 m depth. This indicates a growth of the infragravity waves as they move toward the coast. Bottom panel: Wave energy spectrum during the five-month campaign. The horizontal red lines indicate the infragravity frequency band. The energy at frequencies > 0.04 Hz is related to wind-generated waves.