to whom are you referring.
there is nothing new about the current sea level rising. its been going on for a very long time.
http://www.forbes.com/sites/larrybe...-way-over-their-heads-on-rising-ocean-claims/
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There are proxy records, including organic and ocean sediment data, that provide a picture of past temperatures. But how can we really know the history of sea level changes dating back hundreds of years, or even during recent times?
Larry, tidal station gauges have been in existence for a century now, and as I mentioned earlier, the measured rate of sea level rise has been quite constant, about 18 cm per century. We can also get some picture of temperature and sea level changes over past millennia by looking at melting shrinkage rates of the West Antarctic Ice Sheet. This can be determined by noting how much its âgrounding lineâ, the points where it makes contact with the underlying land mass, has receded. Unlike floating sea ice which doesnât influence sea level when it melts, the West Antarctic Ice Sheet is part of the land mass. When it melts, it adds to sea level just as melting glaciers do.
The end of the last Ice Age 18,000 years ago caused the sea level to rise by a huge amountâ¦about 400 feet. This change happened rapidly at first, caused primarily by the melting of huge ice sheets covering North America and Eurasian land masses which disappeared about 8000-5000 years ago.
The West Antarctic Ice sheet began to melt at that time also, but at a much slower rate, and that melting continues today. We might expect this melting to continue until it is gone in another 7,000 years or so⦠or until the next Ice Age, whichever comes first. Other smaller ice sheets that once existed in the Antarctic are already gone. The oceans will continue to rise, despite anything President Obama may attempt in order to stop them.