The large-amplitude, low-zonal-index 700-mb. circulation

• Main Author: James F. Andrews
• Other Authors: The Pennsylvania State University CiteSeerX Archives
• Format: Text
• Language: English
• Published: 1966
• Subjects: Davis Strait
• Online Access: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.395.1664; http://docs.lib.noaa.gov/rescue/mwr/094/mwr-094-11-0669.pdf

[l] was replaced in August by highindex flow (figs. 1 and 2). Much of this change was related to the development of a strong blocking High over Davis Strait. The positive height anomaly center with this ridge reflects an apparent retrogression from the positive center at 50 ' N., 30 ' W. in July. Heights at 700 mb. in mid-Atlantic fell as much as 500 ft. (fig. 3) as blocking became established at high latitudes over the Atlantic and North America. Fast, zonal flow then prevailed across the Atlantic in August as the westerlies were displaced slightly south of normal. The primary track of migratory cyclones, also farther south than normal, was almost coincident with the axis of negative 700-mb. height anomaly (fig. 2). Long waves over North America retrograded from