fo) 
35 } Een Year Mean, C 
*—x 1991 18.3 
+. @----© 1983-91 16.2 
30 
25 
20 
15 
10 
Air Temperature, e 
JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC 
Month 
Figure 3. Daily air temperature values with monthly means 
Results 
18. Daily and average atmospheric pressure values are presented in 
Figure 4, and summary statistics are presented in Table 2. 
Precipitation 
19. Precipitation is generally well distributed throughout the year. 
Precipitation from mid-latitude cyclones (northeasters) predominates in the 
winter, whereas local convection (thunderstorms) accounts for most of the 
summer rainfall. 
Measurement instruments 
20. Electronic rain gage. A Belfort Instrument Company (Baltimore, MD) 
30-cm weighing rain gage, located near the instrument shelter 47 m behind the 
dune, measured daily precipitation. According to the manufacturer, the 
instrument's accuracy was 0.5 percent for precipitation amounts less than 
12 
