The Changing Carbon Cycle
Date: Thursday, September 29 @ 11:00:00 MDT
Topic: Carbon Cycle Response to Climate Change

by Inez Fung

The carbon cycle has undergone changes from 1998-2003 as a result of extensive droughts. The CO2 seasonal amplitude at MLO halted its increase, and the CO2 growth rate accelerated as a result of a slowing down of the North American carbon sink. In a series of coupled carbon-climate model experiments, we show a greater probability of drier soils in the 21st century, especially in the tropics and in mid-latitude summers as temperature-driven evapotranspiration exceed precipitation, and a positive feedback between the carbon cycle and climate. This positive feedback reduces the land and ocean’s capacity to store fossil fuel CO­ and accelerates the warming. A fossil fuel emission accelerating rapidly as the sink capacities decrease leads to further increases in the airborne fraction of fossil fuel CO2.

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This article comes from The 7th International CO2 Conference Web Site

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