WEATHER AND CIRCULATION OF FEBRUARY 1971 A Stormy Month With a Marked Mid-Month Reversal in the Temperature Regime
The mean 700-mb circulation during February was characterized by an amplified planetary wave train from the central Pacific to eastern North America, with troughs and ridges near their normal positions but stronger than normal (figs. 1 and 2). The amplification may have been initiated by continued r...
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| Language: | English |
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| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.485.1369 http://docs.lib.noaa.gov/rescue/mwr/099/mwr-099-05-0439.pdf |
| Summary: | The mean 700-mb circulation during February was characterized by an amplified planetary wave train from the central Pacific to eastern North America, with troughs and ridges near their normal positions but stronger than normal (figs. 1 and 2). The amplification may have been initiated by continued retrogression of the blocking ridge that had moved into the Bering Sea in January (fig. 1 of Posey 1971). This block was centered over the Tamyr Peninsula in February, where 700-mb heights were 230 m above normal. This was an increase of 350 m with respect to normal compared to the previous month (fig. 3) , when the expanding, retrograding block displaced a deep Low that had been near Novaya Zemlya (Posey 1971). Heights fell south of the block over Asia and also down- |
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