

* 83 

 o 84 



JRN FEB WAR APR MRTf JUN JUL RUB SEP OCT NOV DEC RMNUHL 

 nOMTH 



Figure 4. 198A mean monthly air temperatures 



Atmospheric pressure 



59. The mean annual atmospheric pressure for 1984 was 1017.4 mb with an 

 associated 6.2-mb standard deviation. There was a tendency for low pressures 

 to develop during March and April and high pressures to form in January and 

 then again during September through December (Figure 5 and Table 3). 



60. In comparison with the only prior year of measurements, taken every 

 6 hr, the annual mean was 0.9 mb above that for 1983. 



Precipitation 



61. Precipitation was low during 1984 with June and October-December 

 having the lowest monthly totals (under 30 mm) measured since 1978 (Figure 6 

 and Table 4) . A total of 938 mm was received during the year for a monthly 

 mean of 78 mm. 



62. In prior years, the monthly mean was 91 mm (14 percent higher than 

 during 1984). As seen in Figure 6, climatology shows a relatively even dis- 

 tribution of precipitation; however, 1984 had a wet summer (177 mm in August) 

 and a dry fall. 



31 



