摘要: This study continues the Naval Postgraduate School's development of a computerized program to establish climatological marine-fog frequencies. In particular, fog related information contained in the visibility-weather group elemen... 展开 This study continues the Naval Postgraduate School's development of a computerized program to establish climatological marine-fog frequencies. In particular, fog related information contained in the visibility-weather group elements of the primary synoptic surface reports is segregated into 39 fog categories. Representative fog durations for each category are statistically established from North Pacific Ocean Weather Station summer-season data at Ships, P, Q, and S. Climatological frequencies over the North Pacific Ocean, 30-60N, for the months of June, July, August and September are derived from 12 years (1963-74) of OWS and transient ship observations (about three-fourths of a million reports). Comparison to previously published climatological frequencies is made. (Author) 收起