How much will sea levels rise due to Global Warming?

Question

And you might want to add how much have they risen in the past 150 years.

Answer 1

there is not one solid estimate that covers all the assumptions on Global warming, but if all the ice in the polar zones will melt, that is ice which on land now, and all the ice on mountain tops will also melt, sea level will rise by 50 meters, or 150 feet.

however, worst estimates that I know of are about 8 meters, about 25 feet.

but even a rise of 1 meter, about 3 feet, many places wil be covered with water, and a lot of people will become refugees.

Answer 2

in my residence,during the early 80's, one has to dig 20 feet before one reach water level. Now, one has to land fill the former ground level bc the water level is over it by 2 feet.

Answer 3

Depends on who you cite. I have heard everywhere from 1.5mm/year (6” by 2100) to Al G.’s wildly speculative 20 feet in the next forty years, so I think it’s going to be difficult to pin down a definitive answer. But I think the salient point is that this has happened before as the earth came out of ice ages, and will likely happen again.

I live just a few miles from where some real-world evidence of this came to light a year or so ago. Sea creature fossils were found during excavations about 2-3 miles inland from the Pacific Ocean. I have personally viewed the fossils and can assure you that these are not fish bones carried inland by birds, but are very large ammonites (like a nautilus) some as large as 18” diameter, and a sea cow found about 40 miles SE. They were likely stranded by receding waters. I am familiar with the find sites, and according to topographical maps the area’s elevation is 100-200 feet above sea level.  

My point in all this is that sea levels have been much higher before. And as it happens again, people will move away from the coast. As waters recede, people will move back. Seems like everyone – including myself - likes that ocean view :-)

Answer 4

Due to Archimede's Principle, global warming's affect on sea levels will be minimal.

Answer 5

The Intergovernmental panel on climate change predict that in the worst case scenario sea level will rise by 58cm

in the best case...we'll see a 19cm rise

either way...not great for those who live in Bangledesh and other low lying coastal areas...

Answer 6

the rate of melt has been increasing - expect single year increases comparable to increases that took decades just a few years ago:

http://www.nasa.gov/vision/earth/environ...

Answer 7

Our climate has constantly changed throughout the geologic history of our earth. In the late Mesozoic era (Cretaceous Period, 145-65 Ma) the earth was much warmer and had more greenhouse gases. Relative to today sea level was 600 meters higher than its present level. This of course is a worse case scenario and there is only evidence of sea level rising a few millimeters-centimeters in the past century. These levels fluctuate up and down every year.

According to : Global Warming : Resource Center : Publications : Sea Level Rise ...Sea level has a 1 percent chance of rising 4 feet by 2100 and 15 feet by 2200, but is most likely to rise 2 feet per century along US Coast.

Answer 8

Al Gore says buy lots of waders, because h**l approachith.

Answer 9

According to An Inconvenient Truth, sea levels could rise up to 20 feet in the next 40 years.