by U.S. Dept. of Commerce, National Oceanic and Atmospheric Administration, Environmental Research Laboratories in Boulder, Colo .
Written in English
|Statement||Earl E. Gossard, A. Shelby Frisch|
|Series||NOAA technical memorandum ERL WPL -- 134|
|Contributions||Frisch, Shelby, Environmental Research Laboratories (U.S.)|
|The Physical Object|
|Pagination||17,  p. :|
|Number of Pages||17|
various atmospheric parameters and statistics, such as gradients, variances, and covariances, when normalized by appropriate powers of the scaling velocity u* and the scaling temperature T* (as defined below), become universal functions of z/L. A significant impact of atmospheric thermal stability on the results of only occurs with low soil moisture (i.e., ). The value of , in general, decreases with a decrease in thermal stability. This result may be because weak thermal stability will lead to more dry air entrainment, which would drive more evaporation, leading to more surface Cited by: Studies of velocity, temperature, and humidity variances in the atmospheric boundary layer provide a direct test of similarity predictions as well as indirect estimates of vertical fluxes. In the surface layer, nondimensional variances or standard deviations normalized by the surface layer scaling parameters are expected to be universal Cited by: ICUC9 - 9th International Conference on Urban Climate jointly with 12th Symposium on the Urban Environment where, u i is the velocity, θ is the temperature, c is the concentration, t is the time, ρ is the density, p is the pressure, β is the thermal expansion coefficient and g is the gravity acceleration. Moreover, the non-dimensional parameters.
An air stream at approximately atmospheric temperature and pressure, and containing a low concentration of carbon disulphide vapour, is flowing at 38 m/s through a series of 50 mm diameter tubes. The inside of the tubes is covered with a thin film of liquid and both heat and mass transfer are taking place between the gas stream and the liquid film. From another perspective, atmospheric thermal variation also reflects the main features of haze events indirectly (Zhang et al., ). As shown in Fig. 15, the daily evolutions of the temperature difference (T -T ), A index, K index and dew-point deficit at hPa over the GZB were calculated and analysed, as they played a role in. (b) The velocity variance spectra for this example, with Kolmogorov’s −5/3 slope (the black and yellow dashed line). The shaded green bandwidth is the inner 80% passed on as the inertial subrange Δn. This sample comes from z = m at UTC 30 Sep. The mean U z and θ z were m s −1 and °, respectively. AbstractA spectral tensor model is presented for turbulent fluctuations of wind velocity components and temperature, assuming uniform vertical gradients in mean temperature and mean wind speed. The.
Ana M. Díez-Pascual, in Materials for Biomedical Engineering, Thermal Properties. Thermal stability was analyzed by thermogravimetric analysis (TGA) under an inert atmosphere and the results for the different composites in terms of the initial degradation temperature (T i), temperature of 10% weight loss (T 10), and temperature of maximum rate of weight loss (T max) are gathered. The results suggest that the variation of air temperature has a slight impact on water stability (Fig. 11a). The surface layer water can get more heat though convective heat transfer when the air temperature is higher (SC1), which can result in higher surface and bottom temperature (Fig. 12 a). The thermal structure of the atmosphere is described by the lapse rate of the temperature, which influences the ability of the atmosphere to promote or inhibit ver-tical motion of air (Preston-Whyte & Tyson ). Knowledge of the vertical thermal structure of the . velocity which had a peak near f~ Cospectra of sensible heat, water vapor and CO2 measured during near neutral conditions were similar in shape and had peak frequencies near f~ As thermal stability changed from near neutral to unstable con-.