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

FROM VOLUME 9, NUMBER 3, MARCH 1996

REPORTS...
CLIMATE CHANGE SCIENCE: CARBON CYCLE

Item #d96mar66

Software Availability: Global Carbon Cycling Model—GLOCO Version 2.0 for Macintoshä and Windowsä . Contact Elec. Power Software Ctr., 1930 Hi Line Dr., Dallas TX 75207 (800 763 3772).

Version 2.0 maintains the GLOCO model's graphical interface, but has extensively revised code and algorithms that reflect the latest scientific understanding. Changes include new photosynthesis, respiration and carbon algorithms in the terrestrial ecosystem module; separate treatment of agricultural activity for each biome; input of nitrogen deposition scenarios independent of CO₂ emissions; recalibration based on the historical record from 1700 through 1990; and estimates of historical anthropogenic emissions and land use changes from 1700 to the present.

Item #d96mar67

Understanding Relationships Among Forest Products, Resource Renewability and the Global Carbon Cycle, A. Lucier, 1995. Contact Alan Lucier, NCASI, POB 13318, Res. Triangle Pk. NC 27708 ( fax: 919 558 1998).

Reprint of a paper presented at a technical session on life-cycle analysis and environmental marketing at a Sep. meeting of the Forest Products Research Society. Analyses of forest-sector policy options for reducing net CO₂ emissions have focused primarily on increasing carbon storage in forests. Inadequate attention has been given to possible secondary effects of policy options on timber supplies, private land use decisions, carbon storage in forest products, and competition between forest products and substitute materials with different life-cycle energy profiles.

Item #d96mar68

Estimating Woody Biomass in Sub-Sarahan Africa, A.C. Millington, R.W. Critchley et al, Eds., 208 pp., 1994, $24.95. Order from World Bank Book Store, 1818 H St. NW, Washington DC 20433 (tel: 202 473 2941; e-mail: books@worldbank.org); or designated distributors in various countries.

The first attempt to analyze the stock and sustainable yield of woody biomass in the subcontinent. Found that Africa may have nearly 70 billion tons of carbon stored in trees, a much larger amount that previously suspected. A surprising amount of wood is growing outside tropical rainforests on farms in the arid and semiarid regions. This discovery could help explain the missing carbon sink. (See New Scientist, p. 8, June 11, 1994.)