Accession Number : AD0722684

Title :   Preliminary Models for Determining Instantaneous Precipitation Intensities from Available Climatology.

Descriptive Note : Environmental research papers,

Corporate Author : AIR FORCE CAMBRIDGE RESEARCH LABS L G HANSCOM FIELD MASS

Personal Author(s) : Lenhard,Robert W. ; Cole,Allen E. ; Sissenwine,Norman

Report Date : 05 MAR 1971

Pagination or Media Count : 22

Abstract : Preliminary models are developed relating 1-minute precipitation rates to commonly available monthly climatology. Regression equations are provided for precipitation rates equal or exceeded 0.1, 0.5, 1.0, and 2.0 percent of the time during a month. Models are developed using a precipitation index (monthly precipitation/number of days per month with precipitation) alone, and the index and monthly mean temperature as estimators. Separate models are presented for tropical and extratropical regimes, with some gain in precision of estimate offset by loss of confidence due to the small amount of data and fewer locations in each subset. The models and regressions are regarded as preliminary, since only 36 months of data are available for four stations. Data for additional stations are being prepared and will be used to refine these models. (Author)

Descriptors :   (*ATMOSPHERIC PRECIPITATION, INTENSITY), (*MICROWAVES, ATTENUATION), REGRESSION ANALYSIS, ATMOSPHERIC TEMPERATURE, INDEXES, WEATHER STATIONS, TABLES(DATA)

Subject Categories : Meteorology
      Radiofrequency Wave Propagation

Distribution Statement : APPROVED FOR PUBLIC RELEASE