THE MEAN SEA LEVEL
The height of point on land, anywhere in the continent or island, is measured as being so many feet above mean sea level. The sea level itself is measured with reference to the land mark at the sea shore. Is there not a contradiction, in this mutual dependence?
Where is Tom’s house?
In front of Sam’s house.
And where is Sam’s house?
In front of Tom’s house.
Can we make out any thing from the above dialogue? So is the case with mean sea level. If the sea level is going up in any area, it may be because of land level going down. How can we be certain?
This is not a hypothetical question.
The rock system, supporting continents and oceans is not a single piece. There is space between rocks, which rests on semi molten basalt. Further down, there is molten lava. In other words, the whole crust is shaky and pulsates like our heart, as can be seen in a seismograph. Gravitational pulls, causing ocean tides, continuously distorts the crust and there is no way of measuring the relative changes in height of land and water.
This is something to think of.
The height of point on land, anywhere in the continent or island, is measured as being so many feet above mean sea level. The sea level itself is measured with reference to the land mark at the sea shore. Is there not a contradiction, in this mutual dependence?
Where is Tom’s house?
In front of Sam’s house.
And where is Sam’s house?
In front of Tom’s house.
Can we make out any thing from the above dialogue? So is the case with mean sea level. If the sea level is going up in any area, it may be because of land level going down. How can we be certain?
This is not a hypothetical question.
The rock system, supporting continents and oceans is not a single piece. There is space between rocks, which rests on semi molten basalt. Further down, there is molten lava. In other words, the whole crust is shaky and pulsates like our heart, as can be seen in a seismograph. Gravitational pulls, causing ocean tides, continuously distorts the crust and there is no way of measuring the relative changes in height of land and water.
This is something to think of.
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