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Estimating Net Primary Production of Swedish Forest Landscapes by Combining Mechanistic Modeling and Remote Sensing
Torbern Tagesson, Benjamin Smith, Anders Löfgren, Anja Rammig, Lars Eklundh and Anders Lindroth
Vol. 38, No. 6 (Sep., 2009), pp. 316-324
Stable URL: http://www.jstor.org/stable/40390242
Page Count: 9
You can always find the topics here!Topics: Ecosystem models, Vegetation, Climate models, Boreal forests, Terrestrial ecosystems, Forest ecosystems, Remote sensing, Dynamic modeling, Climate change, Net primary production
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The aim of this study was to investigate a combination of satellite images of leaf area index (LAI) with processbased vegetation modeling for the accurate assessment of the carbon balances of Swedish forest ecosystems at the scale of a landscape. Monthly climatologie data were used as inputs in a dynamic vegetation model, the Lund Potsdam Jena-General Ecosystem Simulator. Model estimates of net primary production (NPP) and the fraction of absorbed photosynthetic active radiation were constrained by combining them with satellite-based LAI images using a general light use efficiency (LUE) model and the Beer-Lambert law. LAI estimates were compared with satellite-extrapolated field estimates of LAI, and the results were generally acceptable. NPP estimates directly from the dynamic vegetation model and estimates obtained by combining the model estimates with remote sensing information were, on average, well simulated but too homogeneous among vegetation types when compared with field estimates using forest inventory data.
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