reference : Long-term pattern and magnitude of soil carbon feedback to the climate system in a warming world

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/reference/f90ac72a-7b08-48fb-95dd-7b73e8b4db50
Bibliographic fields
reftype Journal Article
Abstract It is still not clear how global warming will affect the global carbon cycle, either in terms of the magnitude of the effect or even its sign. Help in answering that question will come from long-term field-based experiments designed to explore carbon cycle-climate feedbacks in an ecosystem context. Melillo et al. performed a 26-year soil-warming experiment in a mid-latitude hardwood forest (see the Perspective by Metcalfe). Warming has resulted in a complex pattern of net carbon loss from the soil. These results support projections of a long-term, positive carbon feedback from similar ecosystems as the world warms.Science, this issue p. 101; See also p. 41In a 26-year soil warming experiment in a mid-latitude hardwood forest, we documented changes in soil carbon cycling to investigate the potential consequences for the climate system. We found that soil warming results in a four-phase pattern of soil organic matter decay and carbon dioxide fluxes to the atmosphere, with phases of substantial soil carbon loss alternating with phases of no detectable loss. Several factors combine to affect the timing, magnitude, and thermal acclimation of soil carbon loss. These include depletion of microbially accessible carbon pools, reductions in microbial biomass, a shift in microbial carbon use efficiency, and changes in microbial community composition. Our results support projections of a long-term, self-reinforcing carbon feedback from mid-latitude forests to the climate system as the world warms.
Author Melillo, J. M.; Frey, S. D.; DeAngelis, K. M.; Werner, W. J.; Bernard, M. J.; Bowles, F. P.; Pold, G.; Knorr, M. A.; Grandy, A. S.
DOI 10.1126/science.aan2874
Issue 6359
Journal Science
Pages 101-105
Title Long-term pattern and magnitude of soil carbon feedback to the climate system in a warming world
Volume 358
Year 2017
Bibliographic identifiers
_record_number 25163
_uuid f90ac72a-7b08-48fb-95dd-7b73e8b4db50