Articles | Volume 14, issue 5
https://doi.org/10.5194/bg-14-1333-2017
https://doi.org/10.5194/bg-14-1333-2017
Research article
 | 
17 Mar 2017
Research article |  | 17 Mar 2017

Modelling spatial and temporal dynamics of gross primary production in the Sahel from earth-observation-based photosynthetic capacity and quantum efficiency

Torbern Tagesson, Jonas Ardö, Bernard Cappelaere, Laurent Kergoat, Abdulhakim Abdi, Stéphanie Horion, and Rasmus Fensholt

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Cited articles

Abdi, A., Seaquist, J., Tenenbaum, D., Eklundh, L., and Ardö, J.: The supply and demand of net primary production in the Sahel, Environ. Res. Lett., 9, 1–11, https://doi.org/10.1088/1748-9326/9/9/094003, 2014.
Baldocchi, D., Falge, E., Gu, L., Olson, R., Hollinger, D., Running, S., Anthoni, P., Bernhofer, C., Davis, K., Evans, R., Fuentes, J., Goldstein, A., Katul, G., Law, B., Lee, X., Malhi, Y., Meyers, T., Munger, W., Oechel, W., Paw, K. T., Pilegaard, K., Schmid, H. P., Valentini, R., Verma, S., Vesala, T., Wilson, K., and Wofsy, S.: FLUXNET: A New Tool to Study the Temporal and Spatial Variability of Ecosystem–Scale Carbon Dioxide, Water Vapor, and Energy Flux Densities, B. Am. Meteorol. Soc., 82, 2415–2434, https://doi.org/10.1175/1520-0477(2001)082<2415:fantts>2.3.co;2, 2001.
Boulain, N., Cappelaere, B., Ramier, D., Issoufou, H. B. A., Halilou, O., Seghieri, J., Guillemin, F., Oï, M., Gignoux, J., and Timouk, F.: Towards an understanding of coupled physical and biological processes in the cultivated Sahel – 2. Vegetation and carbon dynamics, J. Hydrol., 375, 190–203, https://doi.org/10.1016/j.jhydrol.2008.11.045, 2009.
Brandt, M., Hiernaux, P., Rasmussen, K., Mbow, C., Kergoat, L., Tagesson, T., Ibrahim, Y. Z., Wélé, A., Tucker, C. J., and Fensholt, R.: Assessing woody vegetation trends in Sahelian drylands using MODIS based seasonal metrics, Remote Sens. Environ., 183, 215–225, https://doi.org/10.1016/j.rse.2016.05.027, 2016.
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Short summary
Vegetation growth in semi-arid regions is an important sink for human-induced fossil fuel emissions of CO2 and this study addresses the strong need for improved understanding and spatially explicit estimates of CO2 uptake by semi-arid ecosystems. We show that a model incorporating photosynthetic parameters upscaled using satellite-based earth observation simulates CO2 uptake well for the Sahel, one of the largest semi-arid regions in the world.
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