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| Titel |
A model investigation of vegetation-atmosphere interactions on a millennial timescale |
| VerfasserIn |
N. Devaraju, L. Cao, G. Bala, K. Caldeira, R. Nemani |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1726-4170
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| Digitales Dokument |
URL |
| Erschienen |
In: Biogeosciences ; 8, no. 12 ; Nr. 8, no. 12 (2011-12-15), S.3677-3686 |
| Datensatznummer |
250006248
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| Publikation (Nr.) |
 copernicus.org/bg-8-3677-2011.pdf |
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| Zusammenfassung |
| A terrestrial biosphere model with dynamic vegetation capability, Integrated
Biosphere Simulator (IBIS2), coupled to the NCAR Community Atmosphere Model
(CAM2) is used to investigate the multiple climate-forest equilibrium states
of the climate system. A 1000-year control simulation and another 1000-year
land cover change simulation that consisted of global deforestation for 100 years followed by re-growth of forests for the subsequent 900 years were
performed. After several centuries of interactive climate-vegetation
dynamics, the land cover change simulation converged to essentially the same
climate state as the control simulation. However, the climate system takes
about a millennium to reach the control forest state. In the absence of deep
ocean feedbacks in our model, the millennial time scale for converging to
the original climate state is dictated by long time scales of the vegetation
dynamics in the northern high latitudes. Our idealized modeling study
suggests that the equilibrium state reached after complete global
deforestation followed by re-growth of forests is unlikely to be
distinguishable from the control climate. The real world, however, could
have multiple climate-forest states since our modeling study is unlikely to
have represented all the essential ecological processes (e.g. altered fire
regimes, seed sources and seedling establishment dynamics) for the
re-establishment of major biomes. |
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