Oct 30, 2014

EEE 2013: The extraordinary California drought of 2013/2014: character, context, and the role of climate change

Daniel L. Swain, Michael Tsiang, Matz Haugen, Deepti Singh, Allison Charland, Bala Rajaratnam, and Noah S. Diffenbaug
Bulletin of the American Meteorological Society

Main findings:

California’s driest 12-month period on record occurred during 2013/14, and although global warming has very likely increased the probability of certain large-scale atmospheric conditions, implications for extremely low precipitation in California remain uncertain.

Specifically, extreme geopotential height values in this region, which are a defining metric of this type of atmospheric configuration, occur much more frequently in the present climate than in the absence of human emissions.

Full report:

EEE 2013 = Explaining Extreme Events of 2013 from a Climate Perspective