Figure 3.1 (a)
Regression maps for surface air temperature (SAT), surface sea level atmospheric
pressure (SLP EOF-1), and geopotential height at 50 mb (Z50) based upon the
leading principal component of wintertime (Nov-April) monthly mean sea-level
pressure anomalies (AO-index) for 1947-97[ from
Figure 1 of Thompson and Wallace (1998) ]. Contour intervals
(expressed in units per standard deviation of the AO index) are 0.5 K for SAT,
10 m for SLP, and 30 m for Z50.
Figure
3.1 (b)
Normalized (by standard deviation) wintertime expansion coefficient time series
for the SAT and SLP regression maps of Figure 3.1(a) for 1900-1997 [from Figure
5 of Thompson and Wallace (1998)].
The normalized wintertime NAO index (sea level pressure at Lisbon, Portugal
minus sea level pressure at Stykkisholmor, Iceland) has been added at top for
comparison.
Figure
3.1 (c)
Time series
of normalized expansion coefficients for the Z50, Z500, Z500-1000, and the mean
sea level pressure anomalies (AO index), and Eurasian mean (40-70¡ N, 0 - 140¡
E) SAT anomalies (TEU) [from Figure 1 of Thompson and Wallace (1998)].
