Why does Global Warming cause the ocean level to rise?

Quite simply ice is fresh water not salt water. Salt water doesn't freeze. Thus the ice is either on land or is floating on the salt water. When it melts on land it flows into the ocean and raised the level. When it melts in the ocean it also raises the lever. Thus melting ices raises the sea level around the world.

If the ocean is rising(it probably is), it is due to the melting of glaciers and ice caps. Water expands when it freezes, it will not freeze in the absence of cold. It will not freeze, because the ozone is slowly being dissolved(if that is the correct usage of the word), which in affect will keep the north pole warm. Though the melt is mostly in the north, Antarctica has been rather unaffected for some reason.

no there is so much ice that is melting from the glaciers and polor caps that it is causing the oceans to rise.

infact there is a Army Corps of Engineers project starting up in spring to raise the levees around Fir Island due to the rising waters of the ocean and higher river flows.

Fir island is in the Skagit River Delta in Washington

for more on the global warming issue I suggest the following links.

Global Warming

http://www.ucsusa.org/global_warming/science/heat-...

Global Warming FAQ’s

http://lwf.ncdc.noaa.gov/oa/climate/globalwarming....

http://www.nrdc.org/globalWarming/f101.asp

Consequences of Global Warming

http://www.nrdc.org/globalWarming/fcons.asp

Global Warming Science

http://www.ucsusa.org/global_warming/science/

Solution to Global Warming

http://www.nrdc.org/globalWarming/solutions/defaul...

Western Regional Climate Center

http://www.wrcc.dri.edu/

No, because much of the ice is on land. If this were to melt, it would flow into the oceans. Melting the Arctic sea ice won't have much effect on sea level, but melting the glaciers in Greenland would. Bear in mind, much of what we know of global temperature cycles comes from deep cores of the same ice sheet, meaning it has not melted in thousands of years - including several periods warmer than the GW alarmists are predicting.

Yes thats true, but most glaciers have parts above the water, so it can't really affect it unless it's underwater so when the top part melts because its exposed to the hot rays of sun, it melts and slides into the water. That ice is now added to the ocean so there is less ice above the water and more water below it. It's hard to explain so I hope you understand.

galciers contain 90% of their mass below water so when the sun melts the galcier, the extra volume of the water that melted contributes to the rising ocean levels