Geoscience Reference
In-Depth Information
Plate 15
Infra-red photographs of the North Pacific, with the 200-mb jet stream inserted.
Above
:
general zonal flow associated with a high zonal index, 12 March 1971: three major cloud systems
(A, B, C) occur along the belt of zonal flow, and the largest east-west belt of cloud (D) to the south
of Japan is also characteristic of accentuated zonal flow.
Below
: large-amplitude flow regime associated
with a lower zonal index and a blocking ridge, 23 April 1971 (
World Meteorological Organization 1973
).
