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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 #d95mar22

"Carbon Dioxide Emissions at an Italian Mineral Spring: Measurements of Average CO2 Concentration and Air Temperature," P.R. van Gardingen (Inst. Ecol. & Resour. Mgmt., Univ. Edinburgh, W. Mains Rd., Edinburgh EH9 3JG, UK), J. Grace et al., Agric. & For. Meteor., 73(1-2), 17-27, Feb. 1995. (See related paper: "Long-Term Effects of Naturally Elevated CO2 on Mediterranean Grassland and Forest Trees," C. Körner, F. Miglietta, Oecologia, 99(3-4), 343-351, 1994.)

Plants at a site of natural CO2 vents respond to the concentration of CO2 during the day, rather than the much higher nighttime concentrations, making the system useful for biological research.

Item #d95mar23

"Estimating Australian Forest Fire Danger Under Conditions of Doubled Carbon Dioxide Concentrations," T. Beer (CSIRO Bushfire Unit, Mordialloc 3195, Australia), A. Williams, Clim. Change, 29(2), 169-188, Feb. 1995.

Two different models predict an increase in fire danger over much of Australia for doubled CO2. They confirm that annually averaged daily relative humidity is the single most important variable in estimating forest fire danger; even though the models tend to produce relative humidities that are slightly too low, and to overestimate fire danger.

Item #d95mar24

"Mechanisms of Shrubland Expansion: Land Use, Climate or CO2?" S. Archer (Dept. Rangeland Ecol. & Mgmt., Texas A&M Univ., College Sta. TX 77843), D.S. Schimel, E.A. Holland, ibid., 29(1), 91-99, Jan. 1995.

Evaluation of the CO2 enrichment hypotheses shows that there is not a cause-and-effect relationship between the increase in atmospheric CO2 since the Industrial Revolution and displacement of grasses by woody plants in many arid and semi-arid ecosystems.

Item #d95mar25

"Arctic Chill for CO2 Uptake," (see Global Climate Change Digest, Oct 1994.)

Item #d95mar26

"Transient Nature of CO2 Fertilization in Arctic Tundra," (see Global Climate Change Digest, p. 2, Oct.).

Item #d95mar27

Special issue: "The Free-Air Carbon Dioxide Enrichment (FACE) Cotton Project: A New Field Approach to Assess the Biological Consequences of Global Change," W.A. Dugas (Texas Agric. Experiment Sta., 808 E. Blackland Rd., Temple TX 76502), P.J. Pinter Jr., Eds., Agric. & For. Meteor., 70(1-4), approx. 300 pp., Sep. 1994. Order from Elsevier, POB 882, Madison Sq. Sta., New York NY 10159.

Includes 21 papers reporting study results from a site at Maricopa, Arizona, that used cotton as the primary crop, and a CO2 enrichment system that allows stable control of gas concentration over large areas for entire growing seasons. Examines the design and performance of the FACE apparatus, and the effects of elevated CO2 and irrigation treatments on plant growth and physiology, rhizosphere processes, and water and energy balances.

Item #d95mar28

"Modeling the Global Carbon Cycle. . ," (see Global Climate Change Digest, Sep 1994).

Item #d95mar29

"Ocean-Atmosphere CO2 Exchange: An Accessible Lab Simulation for Considering Biological Effects," D.A. Noever (NASA Marshall Space Flight Ctr., ES-76, Huntsville AL 35812), H.C. Matsos et al., Clim. Change, 27(3), 299-320, July 1994.

Monitored the effects of atmospheric CO2 on dense suspensions of bioconvecting microorganisms to study critical properties of the vertical migration of phytoplankton. The ability of such a biologically active suspension to detect atmospheric changes offers a unique method to quantify organism adjustment and vertical migration.

Item #d95mar30

"Plant Responses to Atmospheric CO2 Enrichment in the Face of Environmental Constraints: A Review of the Past 10 Years' Research," K.E. Idso (Bot. Dept., Arizona State Univ., Tempe AZ 85287), S.B. Idso, Agric. & For. Meteor., 69(3-4), 153-203, July 1994.

Analysis of plant carbon exchange rate and dry weight responses to CO2 enrichment shows that the percentage increase in growth produced by raising the air's CO2 content is generally not reduced by less-than-optimal levels of light, water or soil nutrients, nor by high temperatures, salinity or gaseous air pollution. The relative growth-enhancing effects of atmospheric CO2 enrichment are greatest when resource limitations and environmental stresses are most severe.

Item #d95mar31

"Long-Term Effects of Naturally Elevated CO2 on Mediterranean Grassland and Forest Trees," C. Körner (Bot. Inst., Univ. Basel, Schönbeinstr. 6, CH-4056, Basel, Switz.), F. Miglietta, Oecologia, 99(3-4), 343-351, 1994.

Plants growing in a bowl-shaped, 1-ha "CO2 spring" near Sienna, Italy, compared to those growing on a similar substrate nearby, do not grow faster, flower earlier, or become larger. However, large differences in tissue quality were found among the 40 species studied. These alterations could be expected in other plant communities if atmospheric CO2 levels continue to rise.

Item #d95mar32

"Will Increases in Atmospheric CO2 Affect Regrowth Following Grazing in C4 Grasses from Tropical Grasslands? A Test with Sporobolus kentrophyllus," B.J. Wilsey (Dept. Biol., Syracuse Univ., 110 College Pl., Syracuse NY 13244), S.J. McNaughton, J.S. Coleman, ibid., 99(1-2), 141-144, 1994.

Grew a C4 grass from the Serengeti under ambient and doubled CO2, and under clipped and unclipped conditions. The grasses will show little direct response to future increases in atmospheric CO2.

Specialized Papers

Item #d95mar33

"Effects of Low and Elevated CO2 on C3 and C4 Annuals. I. Growth and Biomass Allocation," J.K. Dippery (Dept. Bot., Duke Univ., Durham NC 27708), D.T. Tissue et al., Oecologia, 101(1), 13-20, Jan. 1995.

Item #d95mar34

Two items from Nature, 372(6507), Dec. 15, 1994:

Discussion on climate, CO2 and plant abundance, 625-626.

Comment on carbon fixation by an Arctic tundra ecosystem exposed to elevated CO2, 626.

Item #d95mar35

"Predicting Responses of Photosynthesis and Root Fraction to Elevated [CO2]a: Interactions Among Carbon, Nitrogen and Growth," Y. Luo (Biol. Sci. Ctr., Desert Res. Inst., Univ. Nevada, POB 60220, Reno NV 89506), C.B. Field, H.A. Mooney, Plant, Cell & Environ., 17(11), 1195-1204, Nov. 1994.

Item #d95mar36

Two items from Oecologia, 99(3-4), 1994:

"13C Discrimination During CO2 Assimilation by the Terrestrial Biosphere," J. Lloyd (Inst. Advanced Studies, Australian Natl. Univ., GPO Box 475, Canberra ACT 2601, Australia), G.D. Farquhar, 201-215. A review.

"The Effect of Elevated Carbon Dioxide and Fertilization on Primary and Secondary Metabolites in Birch, Betula pendula (Roth)," A. Lavola (Dept. Biol., Univ. Joensuu, SF-80101 Joensuu, Finland), R. Julkunen-Tiitto, 315-321.

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