238 



Specific pufawnnii 

 into patterns. The 

 Alasbu 



far polhi«vtf« tnveling in the Arctic to Alaska htve been iidcntified and classified 

 most commonly occuning transport route for air poUutanO from Russia to 

 to ttoae shown in Figure S. 



Figures. A typkaltnmaport route MpoUuteddr traveling fnm Eurasia to Akiska<b^^ 

 months. 



Since die weather patterns were anomalous in April. 1986. radier small quantities of fallout 

 occurred in d»e Arctic Basin. It is quite common to have "injection padiways of poUutants 

 traveling from die central and western regions of die USSR into die Arctic dnrmg dm time of year 

 when Arctic Ha« is « its nnximam. We have been measuring die Arctic Haze at Poker Hat 

 Research Range nev Pavtenks for many years. Note in die figure, showing data from *e 

 Univetsi^ (rf Alaska's meanting system, diat die conoentntioa is maximnm in Apnl-May. 



Figure 6. 



The Seasonal variation in poUuHon-derived selenium in air sampled near Fairbanks. 

 Notice the maximim concentration occurs in the spring monOis. 



