Last week we saw, in "Climate Change and the Pacific Decadal
Oscillation" that the Pacific Decadal Oscillation had flipped
into its cold phase. The Atlantic Multidecadal Oscillation went
into its warm phase in 1995. If I'm reading the literature
correctly (always ask that question!), the drought in the
southwestern U.S. (+PDO; +AMO) should start to relax* and, as
the PDO settles in, move to the nations breadbasket (-PDO;
+AMO). Over the next five to twenty years this is going to get
really interesting. Just a little heads-up. ...North American
Drought Drought over north America has been correlated to the
Atlantic Multidecadal Oscillation and the Pacific Decadal
Oscillation. The relationship between drought in the continental
US and the phases of the Pacific Decadal Oscillation (PDO) and
the Atlantic Multidecadal Oscillation (AMO). The most severe
droughts occur when the PDO is in a negative phase, and the AMO
is in a positive phase. From McCabe (2004). More than half (52%)
of the space and time variance in mu