WEATHER AND CIRCULATION OF FEBRUARY 1957' WITH A PRONOUNCED INDEX CYCLE AND TEMPERATURE REVERSAL
sociated with an index cycle characteristic of February 1 sw Charts I-XVII following p. 68 for analyzed climatological data for the month. and with a distinct warming trend in the United States. FIGUBE 1.-Mean 700-mb. height contours (solid) and departures from normal (dotted) (both in tens of feet)...
| Main Authors: | , , |
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| Other Authors: | |
| Format: | Text |
| Language: | English |
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1957
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| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.394.7300 http://docs.lib.noaa.gov/rescue/mwr/085/mwr-085-02-0053.pdf |
| Summary: | sociated with an index cycle characteristic of February 1 sw Charts I-XVII following p. 68 for analyzed climatological data for the month. and with a distinct warming trend in the United States. FIGUBE 1.-Mean 700-mb. height contours (solid) and departures from normal (dotted) (both in tens of feet) for February 1957. Extensive areas of positive anomaly at higher latitudes and negative at lower latitudes were typical low-index circulation patterns. The seat of blocking shifted during the month from its January location in the Gulf of Alaska to northern Siberia and Baffin Bay. 54 MONTHLY WEATHER FEBBUAEY REVIEW 1967 FIG~URE 2.-Difference between the monthly mean 700-mb. height departures from normal for January and February 1957 (in tens of feet). The major changes were incident to the shift in locale of blocking from the Gulf of Alaska to northern Siberia and Baffin Bay. Greatly increased cyclonic development in the eastern Atlantic flooded Europe with mild maritime air. 2. GENERAL CIRCULATION The most striking aspect of the mean monthly 700-mb. circulation (fig. 1) was the preponderance of above normal |
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