Accession Number : AD0670051

Title :   ENERGY, MOMENTUM AND MASS TRANSFERS ABOVE VEGETATIVE SURFACES.

Descriptive Note : Final rept. for 1967,

Corporate Author : CALIFORNIA UNIV DAVIS DEPT OF WATER SCIENCE AND ENGINEERING

Personal Author(s) : Pruitt,W. O. ; Morgan,D. L. ; Lourence,F. J.

Report Date : MAY 1968

Pagination or Media Count : 59

Abstract : The report describes meteorological conditions and outlines the type of data collected during two major cooperative micrometeorological field studies which were conducted at Davis, California during 1967. The first study conducted in the Spring was under the direction and sponsorship of the Atmospheric Sciences Laboratory, Ft. Huachuca, Arizona. Participating were research groups from several universities and government agencies. Fall studies involved cooperative efforts of the University and a research group from the Naval Undersea Warfare Center, San Diego, California. Reported in detail are the various radiation data gathered during the Spring study. Good agreement between measured and summations of individual components for both shortwave and longwave radiation was found. The overall radiation balance, both total incoming and net radiation, was in relatively good agreement with direct measurements made by total and net radiometers. Surface albedo appeared to vary significantly, both with solar angle and with the quality of light being received. The effect of various climatic factors on the partition of net radiation is discussed. A combination energy balance - aerodynamic approach is used to illustrate the relative importance of temperature, humidity, wind speed and the level of (R sub n + G) itself on the partition of energy at a vegetative surface. (Author)

Descriptors :   (*MICROMETEOROLOGY, *PLANTS(BOTANY)), SURFACES, MASS TRANSFER, GRASSES, ENERGY, SURFACE TEMPERATURE, WIND, VELOCITY, EVAPOTRANSPIRATION, SOLAR RADIATION, HEAT TRANSFER, DIURNAL VARIATIONS, HUMIDITY, WATER VAPOR, CLOUDS, WEATHER, MATHEMATICAL ANALYSIS

Subject Categories : Meteorology
      Biology

Distribution Statement : APPROVED FOR PUBLIC RELEASE