Upload
jessica-rohde
View
383
Download
1
Embed Size (px)
Citation preview
“Sticky” Winter Weather: Does It Take Two to Tango?
Jennifer'Francis'Department)of)Marine)and)Coastal)Sciences)
Rutgers)University)
California drought 2014-2015 U.S. Eastern freeze 2014-2015
Nov)2014)
A Tale of Two Winters
Nov)2007)
Sea ice cover: differences from normal Air temperature differences
from%NSIDC% from%ESRL.NOAA%
-PDO
+PDO
The
“It Takes Two to Tango”
hypothesis
Extra heating intensifies ridge, making it more persistent.
Two necessary factors, neither sufficient alone!!
Ice loss has no effect
The good old days…
O U
D
-PDO +PDO
Evidence from the Real World
Lee)et)al,))GRL))2015)
Height)in)meters)
Layer Heights:
OBS
Model with Pac SSTs AND
Sea Ice
Model with Pac SSTs
Model with
Sea Ice
Winter)2013/14)