Estimation of Absolute Humidity during Morning Fog in Central Europe.
Abstract
A tentative estimate of the distribution of the absolute humidity during fog in Central Europe is given via the frequency distribution of the temperature, assuming 100% relative humidity. Only the morning hours were examined for 10 stations. It was learned that 7.5 g/cu meter is exceeded in only one-third of the cases, of which 80% occur in summer and fall. An absolute humidity higher than 9.4 g/cu meter is encountered in 7% of the fog cases in spring and 18% in fall. Fall contributed 45% to the annual fog occurrence. While the threshold of 9.4 g/cu meter is exceeded in two-thirds of the summer cases, the total contribution from summer fogs to the entire number of fogs during the year is only 15%. The frequency distribution of the absolute humidity during fog is exhibited and can be converted to visual range for electro-optical systems when the functional relationship absolute humidity-electro-optical system is known. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1977
- Accession Number
- ADA043657
Entities
People
- Oskar M. Essenwanger