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After a century of polar exploration, the past decade of satellite measurements has painted an altogether new picture of how Earth's ice sheets are changing. As global temperatures have risen, so have rates of snowfall, ice melting, and glacier flow. Although the balance between these opposing processes has varied considerably on a regional scale, data show that Antarctica and Greenland are each losing mass overall. Our best estimate of their combined imbalance is about 125 gigatons per year of ice, enough to raise sea level by 0.35 millimeters per year. This is only a modest contribution to the present rate of sea-level rise of 3.0 millimeters per year. However, much of the loss from Antarctica and Greenland is the result of the flow of ice to the ocean from ice streams and glaciers, which has accelerated over the past decade. In both continents, there are suspected triggers for the accelerated ice discharge—surface and ocean warming, respectively—and, over the course of the 21st century, these processes could rapidly counteract the snowfall gains predicted by present coupled climate models.
Originally posted by Briles
Hi im new to this site but do have a question regarding global warming. The general concesus is that the ice caps will melt & therefore sea levels will rise. ( and the Gulf stream will be switched off). Now, as far as i am aware, ice displaces water at the same volume. For example if you put an ice cube in a glass of water, whatever level the water rises to is where it will stay even if the ice melts. My question is, will the ice that melts into the sea actually make any difference?
Sorry if this seems like a stupid question but i cant really find anything online that answers it.
Hope you can help
Originally posted by Iggus
Finally I was really just interested, as I said, in whether people really think that there is no climate change at all or whether the climate change just isn't caused by man? A simple question, which do you think?