Describe the issue of sea-level change today?

Question

global warming

Answer 1

The sea level never stays static. It is always changing. That is why they discover marine animal fossils in the middle of a desert. The oceans have been rising at a mind blistering rate of about 3mm per year (actually this is the high number. The average is less). you may not know the metric system, but 3 mm is about the height of 2 cd's stacked on each other (the thin way, not end to end). The sea has been rising for the last 15,00 years or so since the last ice age (thank god or I would be under ice right now).

http://www.museum.state.il.us/exhibits/i...

Also, the IPCC predicted some numbers which have not been shown to be correct (Hansen's are even more off). The funny thing is they do not say the levels are rising because of ice melting. They predict the levels will rise due to heated waters expanding (it's in their reports, but good luck reading them as they are really dry).

Do not fear, at the current rate, your seaside bungalow has a solid 150 years before you will need to move it back 100 yards.

Answer 2

ICE MELTS FROM GLACIERS, FRESH WATER RUN-OFF FROM MOUNTAINS RUN DIRECTLY TO THE OCEAN IN THE N.W. AND NEW YORK PUTTING RAILROAD CARS IN OCEAN ALL MAKES ALL THE OCEANS RISE AND TAKE UP MORE DRY LAND ON ALL CONTINENTS

Answer 3

dosnt that hav ta do wit global warmin

&

u should cheak out my question

please and thanks

Answer 4

Since 1993 satellite observations of global sea level have lead to calculations that the sea level rose by 3.1 +/- 0.7 millimeters per year over the period 1993 - 2003.  Some previous decades displayed similarly fast rates and longer satellite records will be needed to determine unambiguously whether sea-level rise is accelerating.

Answer 5

Here are links to some of the latest studies (you can read them and come to your own conclusions).

It was determined last year that Greenland is melting much faster than scientists (including last year's IPCC report) predicted:

"Instead of sea levels rising by about 40 centimetres, as the IPCC predicts in one of its computer forecasts, the true rise might be as great as several metres by 2100. That is why, they say, planet Earth today is in 'imminent peril.'"

http://www.heatisonline.org/contentserve...

"Ground-based surface temperature data shows that the rate of warming in the Arctic from 1981 to 2001 is eight times larger than the rate of Arctic warming over the last 100 years. There have also been some remarkable seasonal changes. Arctic spring, summer, and autumn have each warmed, lengthening the seasons when sea ice melts from 10 to 17 days per decade."

http://www.nasa.gov/centers/goddard/eart...

New Research Confirms Antarctic Thaw Fears - Spiegel Online

http://www.alertnet.org/thenews/newsdesk...

"...the Pine Island Glacier has shrunk by an average of 3.8 centimeters annually over the past 4,700 years. But the Smith and Pope glaciers have only lost 2.3 centimeters of their thickness annually during the past 14,500 years. Satellite measurements taken between 1992 and 1996, though, show a loss of 1.6 meters in thickness per year on the Pine Island Glacier -- a figure that represents 42 times the average melt of the past 4,700 years."

"Global averaged sea level continued to rise through 2006 and 2007. Modern satellite measurements reveal that since 1993, sea-level has been rising at an average rate of about 3 mm per year, substantially faster than the average for the 20th century of about 1.7 mm per year, estimated from coastal sea-level measurements. These coastal measurements indicate that the 2006/2007 global averaged sea level is about 200 mm higher than in 1870 and that since 1870 there has been a significant increase in the rate of the sea-level rise."

http://wcrp.wmo.int/documents/WCRPnews_2...

"A one-meter sea level rise would wreak particular havoc on the Gulf Coast and eastern seaboard of the United States.

'No one will be free from this,' said Overpeck, whose maps show that every U.S. East Coast city from Boston to Miami would be swamped."

http://news.nationalgeographic.com/news/...

Evidence that this rate of seal level rise can happen, since it has happened in the past:

Rohling and his colleagues found an average sea level rise of 1.6m (64in) each century during the interglacial period.

Back then, Greenland was 3C to 5C (5.4F to 9F) warmer than now - which is similar to the warming period expected in the next 50 to 100 years, Dr Rohling said.

Current models of ice sheet activity do not predict rates of change this large. However, they also do not include many of the dynamic processes already being observed by glaciologists, the researchers said.

"The average rise of 1.6m per century that we find is roughly twice as high as the maximum estimates in the IPCC Fourth Assessment Report, and so offers the first potential constraint on the dynamic ice sheet component that was not included in the headline IPCC values," explained Dr Rohling.

http://news.bbc.co.uk/2/hi/science/natur...

If sea levels weren't rising or if the rate weren't accelerating, many skeptical scientists would have clearly documented that by now.