US west 'megadrought' is worst in at least 1,200 years, new study says

Human-caused climate change significant driver of destructive conditions as even drier decades lay ahead, researchers sayThe American west has spent the last two decades in what scientists are now saying is the most extreme megadrought in at least 1,200 years. In a new study, published on Monday, researchers also noted that human-caused climate change is a significant driver of the destructive conditions and offered a grim prognosis: even drier decades lay ahead."Anyone who has been paying attention knows that the west has been dry for most of the last couple decades," says Park Williams, a climate scientist at the University of California, Los Angeles and the study's lead author. "We now know from these studies that is dry not only from the context of recent memory but in the context of the last millennium." Continue reading...