Station Temperature Anomaly Remarks

• Main Author: Robert E. Taubensee-national
• Other Authors: The Pennsylvania State University CiteSeerX Archives
• Format: Text
• Language: English
• Subjects: Bering Strait; Gulf of Alaska; Pacific; North Pole; Alaska; Siberia
• Online Access: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.395.3856; http://docs.lib.noaa.gov/rescue/mwr/101/mwr-101-01-0085.pdf

The mean 700-mb circulation for October 1972 was characterized by a highly amplified midlatitude flow pattern from the central Pacific eastward to Europe (figs. 1, 2). Blocking was evident in the Gulf of Alaska and along an axis westward from Scandinavia. In conjunction with the blocking, midlatitude Lows were observed along coastal California and west of Portugal. Mean height departures fell sharply near the North Pole from September to October (fig. 3) as the blocking ridge that had been over Siberia during September fell away in October. Support for the ridge was lost as the LOW to its west moved polewtard from its mean September position. Most midlatitude components of the mean 7Q0-mb flow pattern moved eastward from Septmber to October under the influence of a seasonal strengthening of the zonal westerlies. As a result, a full-latitude trough in the Pacific Ocean extended southward from the Bering Strait, and a blocking ridge developed downstream near 13Oo-14O0W. The aforementioned Low along the coast of California developed when the attendant trough deepened as it moved slightly westward. The trough accompanying the deep Canadian Low stretched southward over eastern North America during FIGURE 1.-Mean 700-mb contours in dekameters (dam) for October 1972. January1973 1 85FIQURE 2.-Departure from normal of mean 700-mb height in meters (m) for October 1972. FIQURE 4.-Mean 700-mb geostrophic wind speed (m/s) for October 1972. Solid arrows show the observed axes of maximum wind speed, and dashed lines show the normal.