Seasonal and spatial characteristics of formic and acetic acids concentrations in the Southern California atmosphere

Article Abstract:

The formic (HNO3) and acetic acid (HCl) concentrations obtained in the Southern California atmosphere in 1986 yielded an average of 2.7 to 5.8 ppb and 2.9 to 4.2 ppb, respectively. The concentrations are far above the accepted level of HNO3 and HCL concentrations. Changes in HNCL and HCL concentrations, especially near the coast, depend upon the changes in atmospheric dilution potential which could happen if HNO3 and HCL were produced primarily by major sources of pollution such as motor vehicle traffic.

All Other Basic Organic Chemical Manufacturing, Industrial organic chemicals, not elsewhere classified, Acetic Acid, Formic Acid, Research, California, Atmospheric research

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Visibility model based on satellite-generated landscape data

Article Abstract:

A model for illustrating the impact of atmospheric aerosols and gases on visibility is presented. The model uses simulated photographs and is driven by data on landscape images generated by artificial satellites as well as digital terrain elevation data. It is shown that the model is suitable for evaluating visibility-related phenomena in rural settings and it has potential for use in treating ground reflectance on a pixel-by-pixel basis in future models.

Models, Pollution, Control, Visibility

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