tag:blogger.com,1999:blog-9487055.post8459517762832733499..comments2024-03-26T05:56:59.938+11:00Comments on THE PSYCHOLOGIST : Does the Greenie logic ever stop?JRhttp://www.blogger.com/profile/00829082699850674281noreply@blogger.comBlogger1125tag:blogger.com,1999:blog-9487055.post-941633931044919152012-06-29T17:15:03.032+10:002012-06-29T17:15:03.032+10:00Absolutely key point: Sea ice melts from the botto...Absolutely key point: Sea ice melts from the bottom, not the top. Given the air temperatures in the polar regions, there is little chance of surface ice thawing. However, the ocean is wet, oddly enough, because it is NOT frozen and therefore must have surface temperatures ABOVE freezing point.<br /><br />Therefore, heat energy will flow from the nominally warmer water to the colder ice. Once enough energy has been transferred, the ice at that point will melt and "become one" with the "big blue wet thing. The cycle continues.<br /><br />Icebergs do not melt from the top, but from the bottom. They regularly turn upside down as the oddly shaped bits on the bottom melt away.<br /><br />Glaciers also generally melt from the bottom (the "rocky" side. That is because the pressure of the ice on the rock causes melting in a way similar to the effect of skates on a rink. There, you are not skating on ice, but a thin film of water that is created by the pressure from the skate changing the thaw point of the ice and thus generating a "slippery' film.Brucenoreply@blogger.com