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Friday, January 31, 2014

The Shape of Western North America Drought To Come

California is suffering from the worst drought in 500 years. But, it may be nothing compared to what's coming in the future. Reduction in carbon uptake during turn of the century drought in western North America has a chart of projected drought in North America that will take your breath away:

Drought over Western North America from 800 to 2100. a: Reconstructed summer Palmer Drought Severity Index (PDSI) from 800 to 2006, five-year mean. Black rectangles show two megadroughts. Red circles denote five-year drought events as severe as the turn of the century event. Red line denotes the mean PDSI during the 2000-2004 event (~2.11). b: Normalized CMIPS summer precipitation from 1900 to 2100, five-year mean. Horizontal line denotes the turn of the century drought severity. Red and blue shading shows dryness more or less severe, respectively, than the turn of the century drought. Arrows indicate the turn of the century drought.