Showing papers in "Atmospheric Environment in 1972"

TL;DR: In this paper, the authors provide precise directions for a long list of contaminants and all contaminants that can be analyzed or monitored with a given method to facilitate the use of their tools.

TL;DR: In this article, the authors discuss recent evidence in support of the gaia hypothesis and present a simple model of a planetary ecosystem in which homeostasis is a direct and automatic result of the characteristic properties of life.

TL;DR: In this paper, a simple entrainment hypothesis is presented to explain the rise and growth of a turbulent plume in a laminar cross flow, where the entraining rate is assumed proportional to the plume parameter and the tangential and normal velocity differences between the plumes and the surrounding fluid.

TL;DR: In this paper, the authors examined relationships between the fundamental equations of continuity for a trace contaminent in the air-precipitation system, and suggested classifications for various limiting situations of interest.

TL;DR: In this paper, a new method has been developed for the calculation of the plume path of gases emitted by a stack into an atmosphere with wind, taking into account the zone of flow establishment, and also the turbulence and stratification of the atmosphere.

TL;DR: Daily measurements of soot and sulfate aerosols at urban and nonurban locations in Southern Sweden are used to demonstrate that an appreciable long range transport of these substances takes place with source regions in the SE-SW directions.

TL;DR: The factors which determine the concentration-level of a pollutant in a room are expounded, and stress is laid on the medicalhygienic importance of increasing the effects of building materials in reducing pollution.

TL;DR: In this article, two commercial aerosol filter media have been tested for collection efficiency as a function of particle size and velocity, and compared with calculated efficiency based on total mat theory.

TL;DR: The observations suggest that the dense summertime aerosol is probably an end product of the atmospheric photochemistry of air pollutants and that Continental Europe is the principal source.

TL;DR: If current trends persist, this work indicates the control program is having an effect in the anticipated direction, and the empirical, adaptive nature of the time series forecasting and the need for updating are emphasized.

TL;DR: It is found that the inclusion of carbon particles implies a wavelength independent spectral absorption coefficient for a haze L size distribution which is in agreement with experimental evidence.

TL;DR: In this paper, a theoretical study of the rise of turbulent smoke plumes in a steady cross-wind and a density-stratified atmosphere is presented, where conservation laws for volume, buoyancy and energy, and a hypothesis of self-similarity are used.

TL;DR: In this article, experimental data on atmospheric diffusion over a "medium" distance range (order 30 km) have been analysed in an attempt to discover any effects on lateral spread attributable to the skewed wind profile of the planetary boundary layer.

TL;DR: It is demonstrated that a fluctuating plume dispersion model can be used to give realistic estimates of odour frequencies around a point source, when the odour threshold of the chimney gases is determined by sensory methods.

TL;DR: A theory and computational algorithm is developed whereby, assuming an airshed simulation model is available, the optimal locations of a given number of stations can be determined.

TL;DR: In this paper, the upper and lower confidence limits of the geometric mean of a log normal distribution were derived for a given probability, and the relationships between them were derived from theoretical considerations.

TL;DR: In this paper, the authors present information concerning the development of heat islands over South African cities, the literature on vertical temperature structure above cities is briefly reviewed and the complexity of the structure obtaining over Johannesburg is illustrated.

TL;DR: In this article, a comparative study was conducted to define the relationships between and among commonly used methods for measuring suspended particulate matter, including high volume air samplers, British smokeshade measuring devices, membrane filter sampler, tape sampler and cascade impactor sampler.

TL;DR: Multistage regression techniques were used to derive atmospheric class-continuous functions and distance continuous functions for the lateral and vertical atmospheric dispersion coefficients and these equations were highly significant at the 95 per cent confidence level.

TL;DR: In this paper, the absorption of sulphur dioxide by sea water has been measured using a small scale laboratory apparatus with sulphur-35 sulfur dioxide at atmospheric concentrations, and the data suggest that gas-phase diffusion limits the absorption by sea waters and that the oceans may be a major sink for atmospheric sulfate dioxide.

TL;DR: In this article, it is suggested that changes in resistivity due to an additive affected the electron charge on the ash layer, which in turn influenced the surface work function and raised the flashover voltage.

TL;DR: In situ formation of oxidant and diurnal changes in the temperature profile in Mineral King Valley were observed and evidence was recorded of the transport of photochemical smog from the Central Valley to Mineral King.

TL;DR: In this paper, 35 materials including charcoal, metals and metal oxides were tested for their room-temperature catalytic efficiency in decomposing ozone in a 1 ft3 min−1 air stream containing 250 ppb of ozone.

TL;DR: This review deals with the following topics: The amount and concentrations of lead in the atmosphere, the influence of atmospheric lead on the lead content of food and drinking water, and Assessment of health hazards from atmospheric lead.

TL;DR: Detailed measurements have been made, partly with available methods and partly with a method developed especially for this purpose for long distance transport of soot and particle-borne sulphur.

TL;DR: The development of an automatic gas Chromatographic method for measurement of hydrocarbons in air is described, which is a relatively simple, direct and inexpensive method for sensitive and quick measurement.

TL;DR: Spectrofluorescent methods of analysis have shown that soot and exhaust products of aviation engines, both piston and turbine, contain benzo(a)pyrene (BP) and its content diminishes with the distance from the runway.