principal author Benjamin Cook of NASA and his colleagues from Columbia and Cornell universities are saying that climate change will bring to the continent a “new normal” more brutally dry than even the multiple-decades-long droughts that caused the Native American societies of Chaco Canyon and Mesa Verde to collapse. This, they add, is now expected to happen even if greenhouse gas emissions are significantly lowered in the decades to come. The impact of such droughts, they conclude, will exceed the bounds of anything known in the history of the continent or in its scientifically reconstructed pre-history.
In other words, the California drought of recent years offers only a foretaste of what is to come. Incidentally, Cook, et al. are by no means outliers in the literature of climate prediction. Other important studies with similar forecasts support a steadily broadening consensus on the subject. |