A study of turbulent energy over complex terrain (STATE, 1978)

Abstract

The complex structure of the earth's surface influenced atmospheric parameters pertinent to modeling the diffusion process during the 1978 'STATE' field study. The Information Theory approach of statistics proved useful for analyzing the complex structures observed in the radiometric surface temperature signals as measured from an aircraft. Results show that regardless of their complexities, these temperature processes are well approximated as Gaussian processes. Turbulent kinetic energy is shown to increase as the surface temperature signals become more complex. The nature of these variations is examined for five different categories of agricultural land as defined by percent cultivation and percent forestation.

Vertical ozone fluxes and related deposition parameters over agricultural and forested landscapes

“…Flights were conducted on two different days in a region sampled on a much earlier field study program (Bean and Repoff, 1983). The notable aspects of these flights, both performed during the mid-day period on 19 and 21 August, were the hot, dry conditions, and the sampling pattern which consisted of flight legs over both irrigated crops and non-irrigated mixed agricultural and forest land.…”

“…The two flights in the western Tennessee/Kentucky area were made in a mixed land-use region consisting of various amounts of agricultural and forested land cover. A description of the land use and its variability in this region have been presented in Bean and Repoff (1983). The interesting aspect from these two cases was that the aircraft sampling occurred over both non-irrigated land and irrigated cropland under very hot, dry conditions.…”

The Relationship between Vertical Kinematic Eddy Heat Flux, Air Temperature and Turbulent Kinetic Energy in Atmospheric Boundary Layer: Baghdad City

“…The physical processes that lead to turbulence can be described using the limits of the turbulent kinetic energy budget equation. The ability of the flow to become turbulent is determined by the relative balance of these processes, which suggests that Turbulent Kinetic Energy and stability are related [4]. The Turbulent Kinetic Energy equation can be used to set some non-dimensional parameters and measures of stability, such as Obkhove Length and Richardson Number.…”