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  Vegetation sensitivity to global anthropogenic carbon dioxide emissions in a topographically complex region

Diffenbaugh, N. S., Sloan, L. C., Snyder, M. A., Bell, J. L., Kaplan, J. O., Shafer, S. L., et al. (2003). Vegetation sensitivity to global anthropogenic carbon dioxide emissions in a topographically complex region. Global Biogeochemical Cycles, 17(2), 1067. doi:10.1029/2002GB001974.

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Datensatz-Permalink: http://hdl.handle.net/11858/00-001M-0000-000E-D030-E Versions-Permalink: http://hdl.handle.net/11858/00-001M-0000-0024-6A02-D
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BGC0583.pdf (Verlagsversion), 2MB
 
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http://dx.doi.org/10.1029/2002GB001974 (Verlagsversion)
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 Urheber:
Diffenbaugh, N. S., Autor
Sloan, L. C., Autor
Snyder, M. A., Autor
Bell, J. L., Autor
Kaplan, J. O.1, Autor              
Shafer, S. L., Autor
Bartlein, P. J., Autor
Affiliations:
1Department Biogeochemical Systems, Prof. D. Schimel, Max Planck Institute for Biogeochemistry, Max Planck Society, escidoc:1497754              

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Schlagwörter: regional climate model, vegetation model, CO2, western North America, BIOME4, RegCM2 Climate-change scenarios; atmospheric CO2; elevated CO2; environmental-changes; grassland responses; late quaternary; future climate; model; distributions; communities
 Zusammenfassung: [1] Anthropogenic increases in atmospheric carbon dioxide (CO2) concentrations may affect vegetation distribution both directly through changes in photosynthesis and water-use efficiency, and indirectly through CO2-induced climate change. Using an equilibrium vegetation model (BIOME4) driven by a regional climate model (RegCM2.5), we tested the sensitivity of vegetation in the western United States, a topographically complex region, to the direct, indirect, and combined effects of doubled preindustrial atmospheric CO2 concentrations. Those sensitivities were quantified using the kappa statistic. Simulated vegetation in the western United States was sensitive to changes in atmospheric CO2 concentrations, with woody biome types replacing less woody types throughout the domain. The simulated vegetation was also sensitive to climatic effects, particularly at high elevations, due to both warming throughout the domain and decreased precipitation in key mountain regions such as the Sierra Nevada of California and the Cascade and Blue Mountains of Oregon. Significantly, when the direct effects of CO2 on vegetation were tested in combination with the indirect effects of CO2-induced climate change, new vegetation patterns were created that were not seen in either of the individual cases. This result indicates that climatic and nonclimatic effects must be considered in tandem when assessing the potential impacts of elevated CO2 levels.

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 Datum: 2003
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 Identifikatoren: DOI: 10.1029/2002GB001974
Anderer: BGC0583
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Titel: Global Biogeochemical Cycles
Genre der Quelle: Zeitschrift
 Urheber:
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Ort, Verlag, Ausgabe: Washington, DC : American Geophysical Union
Seiten: - Band / Heft: 17 (2) Artikelnummer: - Start- / Endseite: 1067 - Identifikator: CoNE: http://pubman.mpdl.mpg.de/cone/journals/resource/954925553383
ISSN: 0886-6236