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White and Nerdy
Join Date: Jun 2004
Location: South of Charlotte N.C.
Posts: 14,923
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Jyl, the polar angle of the earth slowly shifts.
Antarctic ice has been trending up, arctic ice trending down. Part of this has to do with the orientation of the earth at its farthest and closest points in orbit.
As continental ice is melting in the north, the land beneath is rising from the release of weight. This means in the northern hemisphere despite rising ocean levels that the coast line is growing farther out to sea instead of shrinking.
Total coast lost vs gained is a net gain despite rising ocean levels.
Your article seems to be looking at ice lost each year, but not factoring in ice regained. As the antarctic ice expands on average, there is a greater radius to lose ice from in summer. This means that growing antarctic ice cap will result in...increased ice lost each year.
Kinda funny.
Southern Florida from past geological data is going to have problems in the future. It has cycled to being with the fishes and out again multiple times, and is currently quite a ways on the going under cycle. Even without "man made global warming" about half of Florida is going under if past cycles repeat.
Our past ocean level data shows that peak ocean levels are fairly steady, but bottom ocean levels are getting lower and lower each cycle, cycles are also happening faster.
If we look at pre-human data we'll find ourselves really hoping for man made climate changes in our future. Without it nature's own course will cycle hard bringing drastic change.
If we like the climate we have now, instead of "stopping human change", the only way to keep it will be a very active climate changing course by humans.
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