Accession Number : ADA328046

Title :   An Empirical Method to Derive Hourly Temperature Frequencies for Locations Possessing Only Summarized Climate Information.

Descriptive Note : Technical rept. Oct 94-Oct 95,

Corporate Author : ARMY TOPOGRAPHIC ENGINEERING CENTER ALEXANDRIA VA

Personal Author(s) : Krause, Paul F.

PDF Url : ADA328046

Report Date : JUN 1997

Pagination or Media Count : 248

Abstract : Prior research on the subject of surface air temperature is abundant in professional literature, however little attention has been paid to examining the frequency of occurrence of this parameter. A number of professional fields, such as equipment and building design, agriculture, and the military, have performed research in this area as they require knowledge of how often certain temperature thresholds are equaled or exceeded. Prior research focused on both estimating temperature frequencies at any point along the cumulative temperature frequency curve, and on estimation at fixed frequency points within the tails of the distribution. Using linear discriminant analysis with selected topographic and climatic variables, a model has been developed that assigns stations to discriminant function groups on a monthly basis that reflects commonality in their temperature frequency distributions. Discriminant functions and curve-fitting equations were generated. The model performed best for locations with low to moderate elevations; in regions with higher station densities; and during the warmer months of the year. Reduced performance correlated well with locations at high elevations; at high latitudes; in regions of lower station density; and during the colder months of the year.

Descriptors :   *MATHEMATICAL MODELS, *ATMOSPHERIC TEMPERATURE, FREQUENCY, DISTRIBUTION, TOPOGRAPHY, MATHEMATICAL PREDICTION, MATHEMATICAL ANALYSIS, HIGH ALTITUDE, CLIMATE, SURFACE TEMPERATURE, HIGH LATITUDES, DISCRIMINATE ANALYSIS.

Subject Categories : Meteorology

Distribution Statement : APPROVED FOR PUBLIC RELEASE