California Drought Was A Blip In A Much Larger 'Megadrought,' Study Finds
Source: huff post
04/17/2020 03:44 pm ET
The past 20 years have been the driest since the 1500s, a report in the journal Science found.
By Lydia O’Connor
While California’s five-year drought may be fading from memory, a new study warns that ordeal was but a small piece of a much larger crisis that kicked off at the start of the century: a multi-state “megadrought.”
The report published in Friday’s edition of the journal Science found that while the California drought lasted from 2011 to 2017, a broader look shows that the entire southwest region is still in the midst of its driest period in centuries ― and climate change is to blame.
“Global warming has pushed what would have been a moderate drought in southwestern North America into megadrought territory,” the study authors wrote.
By looking at the tree rings from more than 1,000 trees in the area ― which indicated soil moisture levels from last 1,200 years ― they found that the period from 2000 to 2018 was the driest 19-year span since the late 1500s and the second-driest since 800 CE.
The researchers from Columbia University, the University of Colorado at Boulder and the University of Idaho identified 40 prolonged drought incidents they from the last 1,200 years. Only four are as severe as the megadrought we’re currently experiencing.
Global warming has pushed what would have been a moderate drought in southwestern North America into megadrought territory.”
What sets the current event apart from those others is the role climate change appears to be playing. Before the current dry period, 1980 to 1998 marked the wettest period in the 1,200-year span. That swift “wet-to-dry transition was hastened by the background drying forced from anthropogenic warming,” the technical term for manmade climate change, the authors wrote.
What’s more, the factors they believe fostered earlier megadroughts were probably not present in the last 20 years.
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Read more: https://www.huffpost.com/entry/southwest-megadrought-study_n_5e98f24dc5b63639081bdd89
Encourage all to read the rest. Sobering to say the least.
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They have known that the aquifers have been running dry since at least the late-1990s that I know of. 
