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Ep159 - Henry Pollack | A World Without Ice

Talks at Google

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The Changes in Sea Ice in the Arctic Ocean

Greenhouse gas concentration in the atmosphere is well out of that range of natural variability. We are at 390 parts per million and adding two or three parts per million to the atmosphere every year under the our current industrial economy. And so what what is ing to the ice? As i mentioned earlier, mountain glaciers everywhere are retreating. It's likely that most mountain glaciers in the world will be gone before a mid century. We also see big changes in the sea ice of the arctic ocean. About only 60 % of the area of summer time sea ice that formerly existed is present to day. Its thickness has been reduced by about half.

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