,368 MONTHLY WEATHER REVIEW NCWEMBEB 18B THE WEATHER AND CIRCULATION OF NOVEMBER 1953l A Month of Contrasting Regimes

• Main Author: Jay S. Winston
• Other Authors: The Pennsylvania State University CiteSeerX Archives
• Format: Text
• Language: English
• Subjects: Greenland; Pacific
• Online Access: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.394.6913; http://docs.lib.noaa.gov/rescue/mwr/081/mwr-081-11-0368.pdf

The large-scale circulation in mid-troposphere changed markedly over much of the Northern Hemisphere between the first and second halves of November 1953. The differing circulation regimes which prevailed in the two halves of the month are illustrated by the 15-day mean 700-mb. charts in figure 1. The cha,rt for November 1-15 (fig. 1A) shows a pattern of fairly rapid zonal flow with approximately sinusoidal waves of relatively small amplitude from the east coast of Asia eastward to the Atlantic, while somewhat lower index conditions prevailed.over much-of Europe and Asia. The wave length at middle latitudes was fairly uniform from 'the western Pacific trough eastward to the trough along the east coast of the United States. However, the Atlantic region was dominated by a deep trough south of Greenland longitudinally superimposed on the subtropical ridge in mid-