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  Predicting the onset of net carbon uptake by deciduous forests with soil temperature and climate data: a synthesis of FLUXNET data

Baldocchi, D. D., Black, T. A., Curtis, P. S., Falge, E., Fuentes, J. D., Granier, A., et al. (2005). Predicting the onset of net carbon uptake by deciduous forests with soil temperature and climate data: a synthesis of FLUXNET data. International Journal of Biometeorology, 49(6), 377-387.

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BGC0826.pdf (Publisher version), 873KB
 
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Baldocchi, D. D., Author
Black, T. A., Author
Curtis, P. S., Author
Falge, E., Author
Fuentes, J. D., Author
Granier, A., Author
Gu, L., Author
Knohl, A.1, Author           
Pilegaard, K., Author
Schmid, H. P., Author
Valentini, R., Author
Wilson, K., Author
Wofsy, S., Author
Xu, L., Author
Yamamoto, S., Author
Affiliations:
1Department Biogeochemical Processes, Prof. E.-D. Schulze, Max Planck Institute for Biogeochemistry, Max Planck Society, ou_1497751              

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Free keywords: Phenology Eddy covariance CO2 exchange Canopy photosynthesis United-states Energy fluxes Long-term Atmosphere exchange Ecosystem exchange Dioxide exchange Beech forest Water-vapor CO2 flux
 Abstract: We tested the hypothesis that the date of the onset of net carbon uptake by temperate deciduous forest canopies corresponds with the time when the mean daily soil temperature equals the mean annual air temperature. The hypothesis was tested using over 30 site-years of data from 12 field sites where CO2 exchange is being measured continuously with the eddy covariance method. The sites spanned the geographic range of Europe, North America and Asia and spanned a climate space of 16 degrees C in mean annual temperature. The tested phenology rule was robust and worked well over a 75 day range of the initiation of carbon uptake, starting as early as day 88 near Ione, California to as late as day 147 near Takayama, Japan. Overall, we observed that 64% of variance in the timing when net carbon uptake started was explained by the date when soil temperature matched the mean annual air temperature. We also observed a strong correlation between mean annual air temperature and the day that a deciduous forest starts to be a carbon sink. Consequently we are able to provide a simple phenological rule that can be implemented in regional carbon balance models and be assessed with soil and temperature outputs produced by climate and weather models. [References: 55]

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 Dates: 2005
 Publication Status: Issued
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 Identifiers: Other: BGC0826
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Title: International Journal of Biometeorology
Source Genre: Journal
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Publ. Info: Oegstgeest, Leiden, The Netherlands : The Society
Pages: - Volume / Issue: 49 (6) Sequence Number: - Start / End Page: 377 - 387 Identifier: CoNE: https://pure.mpg.de/cone/journals/resource/110978977731811
ISSN: 0020-7128