failure to respond aggressively to climate change, the report warns, will mean that the planet will inevitably warm by at least 4 degrees Celsius (7.2 degrees Fahrenheit) by the end of the century, ushering in an apocalypse.
The 84-page document,“Turn Down the Heat: Why a 4°C Warmer World Must Be Avoided,” was written for the World Bank by the Potsdam Institute for Climate Impact Research and Climate Analytics and published last week. The picture it paints of a world convulsed by rising temperatures is a mixture of mass chaos, systems collapse and medical suffering like that of the worst of the Black Plague, which in the 14th century killed 30 to 60 percent of Europe’s population.
A planetwide temperature rise of 4 degrees C—and the report notes that the tepidness of the emission pledges and commitments of the United Nations Framework Convention on Climate Change will make such an increase almost inevitable—will cause a precipitous drop in crop yields, along with the loss of many fish species, resulting in widespread hunger and starvation.....
“It is useful to recall that a global mean temperature increase of 4°C approaches the difference between temperatures today and those of the last ice age, when much of central Europe and the northern United States were covered with kilometers of ice and global mean temperatures were about 4.5°C to 7°C lower,” the report reads. “And this magnitude of climate change—human induced—is occurring over a century, not millennia.”
The political and corporate elites in the industrialized world continue, in spite of overwhelming scientific data, to place short-term corporate profit and expediency before the protection of human life and the ecosystem.....
Because about 90 percent of the excess heat trapped by the greenhouse effect since 1955 is momentarily in the oceans, we have begun a process that, even if we halted all carbon emissions today, will ensure rising sea levels and major climate disruptions, including the continued melting of the Greenland and Antarctic ice sheets as well as the acidification of the oceans....Coastal areas in tropical regions will be inundated by sea-level rises that are up to 20 percent higher than those in higher latitudes.
“In particular, the melting of the ice sheets will reduce the gravitational pull on the ocean toward the ice sheets and, as a consequence, ocean water will tend to gravitate toward the Equator,” the report reads....
“By the time the concentration reaches around 550 ppm (corresponding to a warming of about 2.4°C in the 2060s), it is likely that coral reefs in many areas would start to dissolve,” the report reads..... The report projects that the rates of change in ocean acidity over the next century will be “unparalleled in Earth’s history.”
The 2012 drought, which affected 80 percent of the agricultural land in the United States, will become the norm. Tropical South America, Central Africa and all tropical islands in the Pacific are, the report says, likely to regularly experience heat waves of unprecedented magnitude, making human life in these areas difficult if not impossible to sustain.
“In this new high-temperature climate regime, the coolest months are likely to be substantially warmer than the warmest months at the end of the 20th century,” the report reads. “In regions such as the Mediterranean, North Africa, the Middle East, and the Tibetan plateau, almost all summer months are likely to be warmer than the most extreme heat waves presently experienced. For example, the warmest July in the Mediterranean region could be 9°C warmer than today’s warmest July.” It notes that these changes “potentially exceed the adaptive capacities of many societies and natural systems.”
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