Middle-latitude climates - The Global Climate System: Patterns, Processes, and Teleconnections - page 109

Figure 4.3 Mean height
of the 500-mb contours in
(a) January and (b) July.
(From Harman 1991 )

(a) January 500 mb Height

contour interval = 60 meters

(b) July 500 mb Height

contour interval = 60 meters