Urban Effects on Transport and Diffusion of Smokes and Toxic Agents

摘要

With the recent emphasis on military operations in urban domains, the Army is concerned with the city environment and its effects on systems, sensors, and personnel. The Joint Urban 2003 (JUT) project, a cooperative undertaking to study turbulent transport and diffusion in the atmospheric boundary layer conducted in Oklahoma City in the summer of 2003, afforded the Army Research Laboratory (ARL) the opportunity to leverage the capabilities of the Atmospheric Boundary Layer Exploitation (ABLE) suite of instruments to increase our understanding of this environment (Yee et al., 2004). In this paper, we focus on the near surface layer measurements of wind speed and air temperature fluctuations obtained from an array of twelve sonic anemometers on five towers set up outside the central business district (CBD) in surrounding industrial (urban) and semi-rural (suburban) areas. The anemometers sampled at a rate of 10 Hz. After quality control of these data, turbulent statistics of the three wind components and temperature were calculated using ten minute blocks of data (Garvey et al., 2004).