Access

Review

Nature 440, 165-173 (9 March 2006) | doi:10.1038/nature04514

Open Innovation Challenges

naturejobs

Temperature sensitivity of soil carbon decomposition and feedbacks to climate change

Eric A. Davidson1 & Ivan A. Janssens2

Top

Significantly more carbon is stored in the world's soils—including peatlands, wetlands and permafrost—than is present in the atmosphere. Disagreement exists, however, regarding the effects of climate change on global soil carbon stocks. If carbon stored belowground is transferred to the atmosphere by a warming-induced acceleration of its decomposition, a positive feedback to climate change would occur. Conversely, if increases of plant-derived carbon inputs to soils exceed increases in decomposition, the feedback would be negative. Despite much research, a consensus has not yet emerged on the temperature sensitivity of soil carbon decomposition. Unravelling the feedback effect is particularly difficult, because the diverse soil organic compounds exhibit a wide range of kinetic properties, which determine the intrinsic temperature sensitivity of their decomposition. Moreover, several environmental constraints obscure the intrinsic temperature sensitivity of substrate decomposition, causing lower observed 'apparent' temperature sensitivity, and these constraints may, themselves, be sensitive to climate.

MORE ARTICLES LIKE THIS

These links to content published by NPG are automatically generated.

NEWS AND VIEWS

Global change A question of litter quality

Nature News and Views (05 Nov 1998)

Environmental chemistry Browning the waters

Nature News and Views (16 Nov 2006)

See all 13 matches for News And Views