సముద్రమట్టం: కూర్పుల మధ్య తేడాలు

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కొత్త పేజీ: '''సముద్రమట్టం''' (Sea level) భూమి మీద ఎత్తైన లేదా లోతైన ప్రదేశాలను కొలవ...
 
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'''సముద్రమట్టం''' (Sea level) భూమి మీద ఎత్తైన లేదా లోతైన ప్రదేశాలను కొలవడానికి ఉపయోగించే ప్రమాణం.
'''సముద్రమట్టం''' (Sea level) భూమి మీద ఎత్తైన లేదా లోతైన ప్రదేశాలను కొలవడానికి ఉపయోగించే ప్రమాణం.

== కొలత ==

[[Image:Recent Sea Level Rise.png|thumb|right|250px|Sea level measurements from 23 long [[tide gauge]] records in geologically stable environments show a rise of around 20 centimeters (8 inches) during the 20th century (2 millimeters/year).]]

To an operator of a [[tide gauge]], MSL means the "still water level"—the level of the sea with motions such as wind [[wave]]s averaged out—averaged over a period of time such that changes in sea level, e.g., due to the [[tide]]s, also get averaged out. One measures the values of MSL in respect to the land. Hence a change in MSL can result from a real change in sea level, or from a change in the height of the land on which the tide gauge operates.

In the [[UK]], mean sea level has been measured at [[Newlyn]] in [[Cornwall]] and [[Liverpool]] on [[Merseyside]] for decades, by tide gauges to provide [[Ordnance Datum Newlyn|Ordnance Datum]] for the ''zero metres'' height on UK maps.



[[en:Sea level]]
[[en:Sea level]]

09:29, 20 మే 2008 నాటి కూర్పు

సముద్రమట్టం (Sea level) భూమి మీద ఎత్తైన లేదా లోతైన ప్రదేశాలను కొలవడానికి ఉపయోగించే ప్రమాణం.

కొలత

Sea level measurements from 23 long tide gauge records in geologically stable environments show a rise of around 20 centimeters (8 inches) during the 20th century (2 millimeters/year).

To an operator of a tide gauge, MSL means the "still water level"—the level of the sea with motions such as wind waves averaged out—averaged over a period of time such that changes in sea level, e.g., due to the tides, also get averaged out. One measures the values of MSL in respect to the land. Hence a change in MSL can result from a real change in sea level, or from a change in the height of the land on which the tide gauge operates.

In the UK, mean sea level has been measured at Newlyn in Cornwall and Liverpool on Merseyside for decades, by tide gauges to provide Ordnance Datum for the zero metres height on UK maps.