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Global Climate Change Digest

A Guide to Information on Greenhouse Gases and Ozone Depletion
Published July 1988 through June 1999




Item #d94feb24

"Carbon Pools and Flux of Global Forest Ecosystems," R.K. Dixon (Environ. Res. Lab., U.S. EPA, 200 SW 35th St., Corvallis OR 97333), S. Brown et al., Science, 263(5144), 185-190, Jan. 14, 1994.

Reviews recent studies to produce a new global estimate of carbon pools and fluxes, especially related to forest land use, and examines implications for future forest management and carbon balance in a changing climate. Slowing deforestation and other forest management measures could conserve or sequester significant quantities of carbon, but future forest carbon cycling trends, attributable to losses and regrowth associated with changes in global climate and land use, are uncertain. Model projections and other results suggest that forests could be either sinks or sources of carbon in the future.

Item #d94feb25

"Multiple-Century Response of a Coupled Ocean-Atmosphere Model to an Increase of Atmospheric Carbon Dioxide," S. Manabe (GFDL, POB 308, Princeton NJ 08542), R.J. Stouffer, J. Clim., 7(1), 5-23, Jan. 1994.

Compares three 500-year simulations: constant CO2, CO2 doubling by year 70 and remaining constant, and CO2 quadrupling by year 140 and remaining constant. One of the most notable results is the gradual disappearance of thermohaline circulations in most of the model oceans during the first 250 years of the quadrupled CO2 case, primarily due to the capping of the oceans by fresh water resulting from increased poleward moisture transport. Elevated CO2 leads to global temperature increase of 3.5C° and 7°C respectively, and sea level rise due to thermal expansion alone of about 1 and 2 meters, respectively.

Item #d94feb26

"A Low-Cost Technology for Increasing the Earth's Albedo to Mitigate Temperature Rises," S.S. Penner (Dept. Appl. Mechanics, Univ. California, San Diego CA 92093), J. Haraden, Energy, 18(10), 1087-1090, Oct. 1993.

Calls for preliminary research on the feasibility of injecting particles into the atmosphere using jet aircraft as a means of limiting global temperature increase; application on a large scale should not even be considered except as a possible last resort 50-100 years from now.

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