PART II: METEOROLOGY 



9. This section summarizes the meteorological measurements made during 

 the current year and in combination with all previous years. Meteorological 

 measurements during storms are given in Part IX. 



10. Mean air temperature, atmospheric pressure, and wind speed and 

 direction were computed for each data file which consisted of data sampled 

 four times per second for 20 min every 6 hr beginning at or about 0100, 0700, 

 1300, and 1900 eastern standard time (EST); these hours correspond to the time 

 that the National Weather Service (NWS) creates daily synoptic weather maps. 

 During storms, hourly data recordings were made. 



Air Temperature 



11. The FRF enjoys a typical marine climate which moderates the temper- 

 ature extremes of both summer and winter. 



Measurement instruments 



12. A Yellow Springs Instrument Company, Inc. (YSI) (Yellow Springs, 

 OH), electronic temperature probe with analog output interfaced to the FRF's 

 computer was operated beside the NWS's meteorological instrument shelter 

 located 43 m behind the dune (Figure 2) . To ensure proper temperature 

 readings, the probe was installed 3 m above ground inside a "coolie hat" to 

 shade it from direct sunlight yet provide proper ventilation. 



Results 



13. Daily air temperature values are shown in Figure 3. Average air 

 temperature statistics are tabulated in Table 2 and illustrated in Figure 4. 



Atmospheric Pressure 



Measurement instruments 



14. Electronic atmospheric pressure sensor. Atmospheric pressure was 

 measured with a YSI electronic sensor with analog output located in the labora- 

 tory building at 9 m above NGVD. Data were recorded on the FRF computer. 

 Data from this gage were compared with those from an NWS aneroid barometer to 

 ensure proper operation. 



