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Global Climate Change DigestArchives of the
Global Climate Change Digest

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

FROM VOLUME 8, NUMBER 6, JUNE 1995

PROFESSIONAL PUBLICATIONS...
IMPACTS OF CLIMATE CHANGE: CARBON CYCLE


Item #d95jun51

"Climate-Driven Flushing of Pore Water in Peatlands," D.I. Siegel (Dept. Earth Sci., Syracuse Univ., Syracuse NY 13244), A.S. Reeve et al., Nature, 374(6522), 531-533, Apr. 6, 1995.

Reports on the response of groundwater flow and porewater chemistry in the Glacial Lake Agassiz peatlands of northern Minnesota to the regional drought cycle. Periods of drought lasting for at least 3-5 years produce striking changes in the chemistry of the pore water and directly affect the rates of fermentation and methanogenesis and the export of dissolved carbon compounds.


Item #d95jun52

"Responses in NPP and Carbon Stores of the Northern Biomes to a CO2-Induced Climatic Change, as Evaluated by the Frankfurt Biosphere Model (FBM)," M.K.B. Lüdeke (Inst. Phys. Chem., J.W. Goethe Univ., Marie Curie Str. 11, 60439 Frankfurt am Main, Ger.), S. Dönges et al., Tellus, 47B, 191-205, 1995.

For tripled CO2, the prediction for a pure climate effect is a 22% decrease of net primary production (NPP), resulting in a 170 Gt carbon source. Considering a CO2-induced enhancement of maximum photosynthesis, the pure climate effect is more than compensated, with a NPP increase of 9% and a total carbon sink of 50 Gt.

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