| 21. | The Kronstadt sea-gauge with the tide gauge pavilion is the zero level of the Baltic system of depths and heights.
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| 22. | A minor tsunami was reported, which was recorded by a temporary tide gauge, giving a maximum height of 1 m.
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| 23. | Over the last century, tide gauges indicated an average sea-level rise of four-hundredths to eight-hundredths of an inch a year.
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| 24. | The pier is home to a tide gauge with a sporadic history, showing an above average rate of sea level rise.
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| 25. | However, further work with long tide gauges records revealed that sea level acceleration may have started earlier, over 200 years ago.
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| 26. | When it comes to estimating the greater ocean picture, new modern tide gauges can often be improved upon by using satellite data.
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| 27. | Decades of data collected from the ground, using tide gauges placed along the coasts, have generally shown that ocean levels are rising.
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| 28. | This network of tide gauges and buoys helps the center to validate the arrivals of tsunami waves in the Indian Ocean region.
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| 29. | Cm / year, based on measurements of sea level rise from 23 long tide gauge records in geologically stable environments . }}
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| 30. | The tide gauge hut, constructed in 1970, is timber framed with fibre cement sheeting, a galvanised metal deck and an aluminium louvre mechanism.
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