NY Times - Hans Joachim Schellnhuber, the director of the Potsdam Institute for Climate Impact Research in Germany, said that if the buildup of greenhouse gases and its consequences pushed global temperatures 9 degrees Fahrenheit higher than today - well below the upper temperature range that scientists project could occur from global warming - Earth's population would be devastated. . .
Dr. Schellnhuber, citing his own research, said that at certain "tipping points," higher temperatures could cause areas of the ocean to become deoxygenated, resulting in what he calls "oxygen holes" between 600 and 2,400 feet deep. These are areas so depleted of the gas that they would badly disrupt the food chain.
Unabated warming would also lead to "disruption of the monsoon, collapse of the Amazon rain forest and the Greenland ice sheet will meltdown," he said.
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