Question

How big a difference between the highest high tide and the lowest low tide has there been in Kungsvik (Gothenburg, Sweden) in the new week (enter the date for the day you checked the data). Do you see a clear tide signal? If not, what could it be?

Answer 1

When the highest part, or crest of the wave reaches a particular location, high tide occurs; low tide corresponds to the lowest part of the wave, or its trough. The difference in height between the high tide and the low tide is called the tidal range .
Because the Earth rotates through two tidal “bulges” every lunar day, coastal areas experience two high and two low tides every 24 hours and 50 minutes. High tides occur 12 hours and 25.0 minute apart. It takes six hours and 12.50 minutes for the water at the shore to go from high to low, or from low to high.
To make accurate records, tide gauges at fixed stations measures water level over time. Gauges ignore avariations caused by waves with periods shorter than minutes. These data are compared to the reference (or datum) level usually called mean sea level.