WEATHER AND CIRCULATION OF JUNE 1971 UDC 661.613: 661:M)B.16‘1971.06” A Reversal of the Temperature Regime in Most of the United States

• Main Author: Julian W. Posy
• Other Authors: The Pennsylvania State University CiteSeerX Archives
• Format: Text
• Language: English
• Published: 1971
• Subjects: Greenland; Pacific
• Online Access: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.408.4236; http://docs.lib.noaa.gov/rescue/mwr/099/mwr-099-09-0709.pdf

signscant changes in average 7oo-mb flow were observed in June (figs. 1 and 2). This was in contrast to the persistence noted from to May (Stark lg7l). A considerable increase occurred in the 700-mb heights over the eastern half of the United States, where 8 20-m positive height anomaly center (fig. 3) replaced the 30-m negative height anomaly center of May near the Great Lakes. The only area in the East with below-normal heights was the extreme Southeast, and here the dspartures were less than 10 m below normal. only in the Northwest were 700-mb heights lower in June than in May (fig. 2). Very strong ridging was manifested across Greenland and the polar region this month (fig. 2). In fact, rising upper level heights prevailed from North Africa through the polar bash and into the tropical sections of the Pacific near the 180th meridian. The largest 700-mb height increases were more than 130 m near southern Greenland and over 120 m in the Ban Island area.