February 28, 2007
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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 5, NUMBER 12, DECEMBER 1992
CLIMATE CHANGE IMPACTS: CONFERENCE ON AGRICULTURAL AND NATURAL ECOSYSTEMS
J. Exper. Bot., 43(253), Aug. 1992, contains papers
(mainly reviews) from a meeting held in San Miniato, Italy, Sep. 1990.
"Past, Present and Future Levels of Greenhouse Gases in the Atmosphere
and Model Predictions of Related Climatic Changes," E. Roeckner (M. Planck
Inst. Meteor., Bundesstr. 55, W-2000 Hamburg 13, Ger.), 1097-1109. Paleoclimatic
data and model results are consistent with the hypothesis that climate and
greenhouse gas concentrations interact in a positive feedback loop. Climate
models predict future significant warming unless industrial emissions are
"Biosphere Structure, Carbon Sequestering Potential and the Atmospheric
14C Carbon Record," J. Goudriaan (Dept. Theoret. Production Ecol., Agric.
Univ., POB 430, 6700AA Wageningen, Neth.), 1111-1119. The behavior of a
numerical model of the global carbon cycle is elucidated using a simple
analytical model for the biosphere. Topics addressed include the
CO2-fertilization effect, and transfers of carbon from the upper mixed ocean
layer to the deep sea and to the atmosphere.
"The Direct Effect of Increased CO2 on Gas Exchange and Growth of
Forest Tree Species," M. Mousseau (CNRS-URA 121, Lab. d'Écol. Végétale,
Univ. Paris Sud, 91405 Orsay Cedex, France), B. Saugier, 1121-1130. Reviews
different experimental approaches taken, and principal results. Emphasizes the
large areas of ignorance, particularly reasons for the different responses of
"Water Stress, CO2 and Climate Change," M.M. Chaves (Inst. Super
Agron., Tapada Ajuda, P-1399 Lisbon, Portugal), J.S. Pereira, 1131-1139. Reviews
understanding of whether a high CO2 concentration can compensate for the
decrease in carbon gain in water-stressed plants. Experimental and model
evidence suggests that there may be a partial compensation.
"Mineral Nutrition and Plant Growth Response to Climate Change,"
T.R. Sinclair (USDA-ARS, Univ. Florida, Gainesville FL 32611), 1141-1146. A
review of possible influences shows that it is very difficult to predict plant
growth response to climate change because of the large uncertainty about mineral
"The Effects of Climate Change on Development in Wheat: Analysis and
Modeling," F. Miglietta, J.R. Porter (Dept. Agric. Sci., Univ. Bristol,
AFRC Inst. Arable Crops, Long Ashton Res. Sta., Bristol BS18 9AF, UK),
1147-1158. The application of two models, which differ in approach to predicting
plant development, are used to identify new ideotypes of wheat suitable for
altered risk of spring frost and an earlier start to the dry season.
"Some Implications of Climatic Change for Agriculture in Europe,"
T.R. Carter (Environ. Change Unit., Univ. Oxford, Oxford OX1 3TB, UK), J.H.
Porter, M.L. Parry, 1159-1167. Gives initial results of a study to evaluate the
broad-scale sensitivity of agriculture. Predicts a rate of shift of the grain
maize limit that could be unprecedented in the historical record.
"Effects of Climate Change and a Doubling of CO2 on Vegetation
Diversity," L. Rochefort (Dept. Animal & Plant Sci., Univ. Sheffield,
Sheffield S10 2UQ, UK), 1169-1180. Presents a model for predicting the response
of global family diversity to environmental change, including direct effects of
elevated CO2 on transpiration. About one-third of the floristic regions of the
world exhibit increased diversity under expected climatic change, especially the
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