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Waves and Tides

Water Pressure over MISO instrument Frame for last 4 Days

The tide data below was gathered by a  high precision digital pressure sensor deployed on the MISO instrument frame. This 4 day timeseries shows pressure in decibars caused by the depth of water above the transducer, which is approximately 1m above the bed. Each data point represents a 5 minute average of the pressure, which filters out the contribution by surface gravity waves. The resulting plot of water depth shows the sea height variations due primarily to the lunar tides. The variability in the tidal range results from the addition of different tidal components which cause complicated "beats" in the tidal cycle. The time axis is yeardays, where yearday 1.000 is the start of 1 January.

 

Pressure Data over last 4 days
(This plot is updated every hour) Click on plot to view larger image.



Pressure over MISO instrument Frame for last 2 minutes

The wave data below was collected by the same  high precision digital pressure sensor noted above. This 2 minute timeseries shows pressure in decibars at the original 2 sample per second data rate, representing the sea height variations due to surface gravity waves.

Pressure Data over the last 2 minutes
(This plot is updated every hour) Click on plot to view larger image.

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