When water freezes, the dissolved solids come out of solution and remain in the liquid. So, the water in ice is always fresh water. Even the arctic pack ice which is mostly derived from sea water. I am really not trying to be offensive here, but I have to wonder why you would even consider the possibility of the antarctic glaciers being salt water. With the arctic pack ice, I can see this as being a possibility because it is derived from sea water. However, the antarctic glaciers are up on a continent. Therefore, their ice is not derived from sea water. (It can't be.) So, it must be from precipitation (snow) which is always fresh water.

salt

OK! So we concluded that Antarctic glaciers are fresh water, along as glacier water in South America and Europe. Is there some plan to harvest melted water to human benefit? when melted it is totally wasted!

"Icebergs in the Antarctic area sometimes have stripes, formed by layers of snow that react to different conditions. Blue stripes are often created when a crevice in the ice sheet fills up with melt water and freezes so quickly that no bubbles form. When an iceberg falls into the sea, a layer of salty seawater can freeze to the underside. If this is rich in algae, it can form a green stripe. Brown, black and yellow lines are caused by sediment, picked up when the ice sheet grinds downhill towards the sea." Source:Antarctica Frozen Wave

fresh water: 1) "when salty sea water becomes cold enough to turn to ice, the salt in the water is expelled and falls into the water below the ice, creating a layer of salty water. Ice that forms from ocean water is called "sea ice." You mention ice bergs, which are different. Icebergs are pieces of a glacier or ice sheet that has pushed to the edge of a continent or an island and broken off to float away in the ocean. Glaciers and ice sheet are formed by snow that piles up over many, many years and doesn't melt because summers aren't warm enough. This snow becomes compacted into glacier ice as more snow piles up on top of it. Since glaciers and ice sheets are made of snow, they are fresh water - not salt water." Source and further information: http://www.usatoday.com/weather/resources/askjack/newice.htm 2) "A glacier is a large, slow-moving mass of ice, formed from compacted layers of snow, that slowly deforms and flows in response to gravity and high pressure. The word glacier comes from French via the Vulgar Latin glacia, and ultimately from Latin glacies meaning ice. Glacier ice is the largest reservoir of fresh water on Earth, and second only to oceans as the largest reservoir of total water." Source and further information: http://en.wikipedia.org/wiki/Glacier

Both in different layer, from frozen waves and precipitations.