Paper 2 



the eastern Pacific and no 

 of their normal positio 

 western North America an 

 Coupled with intense sub 

 eastern GreenLandr these 

 record intensity over t 

 maritime eir into north 

 confining arctic air mas 

 noted thaty in December/' " 

 ana 75N over the tJestern H 

 value since records oegan 

 than normal between 60 N 

 zonal wino anomaly was dev 

 Scandinavia where the ma 

 the north of normal around 

 upper westerly wind speed 

 in December (Taub?nsee 197 

 circulation over both o 

 periodically expanding s 

 continued throuqhout the 

 the strona westerlies were 

 ana* with a weaker* mo 

 continents* the hemispheri 

 without amplitude. Pe 

 extensive Asian ridge was 

 across the western and 

 cycLogenesis there ana rei 

 the eastern Pacific (T 



January* 



i na speeds aero 



Atlantic averaged o to 

 maximum axis." (waqner 

 subtropical ridging over 

 (south of 35 NO reversed th 

 to weaken from December t 

 Western Hemisphere in Janu 

 tendencies cantinued for 

 temperate westerlies (35 

 averaginj their second 

 intensities of record in f 

 situation was somewhat alt 

 of trouqhing at the wester 

 a whole was characterized 

 with ridging in the west b 

 frequent Chinook winds a 

 with mild maritime air acr 

 country. 



rth Atlantic 

 OS and tren 

 d the f ri n 

 polar low s* 

 cells deve I 

 he Western 

 ern North 

 ses to highe 

 The 700 mb p 

 em i sphe re av 

 in 194.3* and 



and 65N." 

 eloped betwe 

 in jet St rea 



the Atlanti 

 s averaged 1 

 6a). This p 

 ceans* gener 

 outhwara to 

 winter. A 



largely a f 

 re meridiona 

 c wave patt 

 riodically 

 able to inj 



central Fa 

 nv igorat i no 

 aubensee 19 

 ss the easte 



V m/s stro 



19763) . 

 both oceans* 

 eir norma I s 

 o more than 

 ary (Wagner 

 the remai 

 N-55K) and 

 h i ghes t and 

 ebruary (Die 

 ered in Febr 

 n American s 



by intense 

 ringing drou 

 t the easter 

 OSS much of 



* lying well t 

 d iny northeast 

 ges of north 

 on average* ov 

 oped polar w 



Hemisphere* 

 America and 

 r lat i tudes . 

 olar westerlie 

 e raged 7.8 m/s 



as much as 5 

 I n abs olut e t e 

 e n southern G 

 m axis was def 

 c ridge. In 

 0-15 m/s faste 

 at t ern of vi go 

 ally poleward 



more usual 

 gain* as in pr 

 eature of the 

 I f low ove r t h 

 ern as a wh 

 t h roughout t h 

 ect arctic a 

 cific* stimul 

 sout hwester ly 

 76a; Wagne r 

 rn Pacific and 

 pge r than no 

 Meanwhile* w 



the subt ropi c 



easonal streng 



3 m/s below no 



1976a). Bo 



nder of the 



subt ropi ca L 

 their lowest * 

 kson 1976a). 

 uary with the 

 eaboard * the U 

 high Latitude 

 ght to the sou 

 n s lope of the 

 the northern 



the 

 ward to 

 west Eu 

 er Alask 

 esterlie 

 driving 

 Europe * 

 Wagner ( 

 s betwee 

 * the hi 

 m/s St r 

 rms * the 

 r een land 

 lected f 



this 

 r than n 

 rous wes 

 of norma 

 I a t i t 

 evious y 



ocean 

 e i nte rv 

 o le was 

 e winte 

 ir sout 

 at i ng in 



flow a 



1976a). 

 the e 

 r ma I nea 

 i t h in 

 a I weste 

 t hening 

 rmal ove 

 th of 



winter* 

 weste 

 respect i 

 Though 

 establis 

 . S . wi nt 

 westerly 

 t hwest * 



Rockies 

 part of 



north 

 cover 

 rope . 

 a and 

 s of 



mild 

 and 

 1977) 

 n 55N 

 ghe St 

 onger 



peak 

 and 

 ar to 

 zone* 

 or ma I 

 ter ly 

 I but 

 udes * 

 ears* 

 areas 

 eni ng 

 not 

 r an 

 hward 

 tense 

 cross 

 In 

 nt i re 

 r the 

 tense 

 rl i es 

 t rend 

 r t he 

 these 



with 

 r I i es 

 ve ly* 

 the 

 hment 

 er as 



flow 



with 



* and 



the 



No relation to present author 



20 



