A turbulence-driven air fumigation facility for studying air pollution effects on vegetation [electronic resource].
- Washington, D.C : United States. Dept. of Energy. Office of Energy Research, 1990. and Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
- Physical Description:
- Pages: (6 pages) : digital, PDF file
- Additional Creators:
- Brookhaven National Laboratory, United States. Department of Energy. Office of Energy Research, and United States. Department of Energy. Office of Scientific and Technical Information
- Studying the effects of atmospheric perturbations on plant growth has usually involved compromises between realism and convenience. Isolating the effects of specific parameters, such as air pollution, elevated CO₂ concentration, or water stress, requires a manipulated rather than a completely natural environment. Attempts to develop large free-air controlled exposure systems date back several years, primarily for experimental exposures to elevated levels of air pollutants such as SO₂ or ozone. These early systems suffered from two types of problems: imprecise control of the exposure gas concentrations; substantial spatial variability within the exposed plots. The Free-Air CO₂ Enrichment (FACE) open-air fumigation system, developed at Brookhaven National Laboratory (BNL), has addressed both of these problem areas. This system differs from other free-air exposure systems in that the injection gas is pre-diluted in ambient air to an average 3--4% by volume, and the injection gas mass flow is adjusted each second by the micoprocessor-driven controller. This document discusses the design and performance of this facility. 3 refs., 4 figs., 1 tab.
- Published through SciTech Connect., 10/01/1990., "bnl-45375", " conf-910143--1", "DE91004753", 71. annual meeting of American Meteorological Society, New Orleans, LA (USA), 13-18 Jan 1991., and Lewin, K.; Hendrey, G.; Lipfert, F.; Nagy, J.; Alexander, Y. . Applied Mathematics Dept.
- Funding Information:
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