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Item #d90oct31

An Evaluation of the Relationship between the Production and Use of Energy and Atmospheric Methane Emissions (DOE/NBB-0088P; TR047), D.W. Barns (Pacific Northwest Lab.), J.A. Edmonds, approx. 280 pp., Apr. 1990. Available (no charge) from Carbon Dioxide Info. Analysis Ctr., U.S. Dept. Energy, Oak Ridge Nat. Lab., Oak Ridge TN 37831 (615-574-0390).

Describes a detailed analysis of the various energy-related sources of methane emissions for use in a model intended to predict future emissions of this greenhouse gas. Considered are coal mining, natural gas production and distribution, automotive exhaust, biomass burning and landfill decay. The sum of the estimated sources is 110 Tg/year, at the low end of the range of similar independent estimates.

Item #d90oct32

Request the following (no charge) from American Gas Assoc., 1515 Wilson Blvd., Arlington VA 22209 (703-841-8473).

Workshop Findings: International Workshop on Methane Emissions from Natural Gas Systems, Coal Mining and Waste Management Systems, 16 pp., 1990. The April 1990 workshop in Washington was sponsored by the U.S. EPA, the U.S. Agency for International Development and the Environmental Agency of Japan. Recent preliminary data show that methane emissions from natural gas systems in developed countries are likely to be less than 1% of throughput; if verified, natural gas use should be encouraged as one option to counter greenhouse gas emissions. Emissions from coal mining and waste management are less certain but thought to be significant. Technical and policy options for reducing all three sources are enumerated.

The Relative Role of Methane and Carbon Dioxide in the Greenhouse Effect, R.R. Gamache, D. Golomb (Univ. Lowell, Lowell, Mass.), 25 pp., Jan. 1990. A spectroscopic data base and an atmospheric radiation model were used to calculate the infrared absorption ratio of methane compared to carbon dioxide for a realistic atmospheric column. The result (13.2) illustrates the much greater global warming effect of additions of methane to the atmosphere, and is smaller than most other estimates, which range from 6.9 to 31.4. Empirical measurement of this ratio by satellite radiance spectra is needed.

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