of the sea levels designates the height of the sea. It is not contrary to Normalnull constant separates depends for example on tides, which are dependent on the moon. In addition the height of the sea level hangs on a long-term basis of climatic fluctuationsand other influences off. Thus today the sea level rises by the Abtauen of the glaciers due to the global climatic heating up , possibly also by a small expansion of the highest sea layers (surface layer) above the Thermokline. Evaluations of Pegelmessungen and satellite measurements of TOPEX/Poseidonit points out that the sea level rises at present around approximately 18 cm per century.
terrestrial attraction force affects height of the sea level
the height of the water surface attaches also of the tightness of the magma off, the more closely the masscool places of the Earth's mantle is, is the higher in these places the terrestrial attraction force. So the water level is in the Indian ocean approx. Than he on the average it is 85 meters higher, northeast from Australia is hotter the magma and possessesaccording to less density and thus attraction, here the sea level up to 100 is meters deeper than it on the average.
|Wiktionary: Sea level - word origin, synonyms and translations|