Estimación de la eficiencia del uso de la radiación en bosques mediterráneos a partir de datos MODIS. Uso del Índice de Reflectancia Fotoquímica (PRI)

Estimación de la eficiencia del uso de la radiación en bosques mediterráneos a partir de datos MODIS. Uso del Índice de Reflectancia Fotoquímica (PRI)
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地中海辐射使用效率评估与 MODIS 数据使用 (PRI) 的关系。

DOI:
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发表时间:
2008
期刊:
影响因子:
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通讯作者:
Iolanda Filella
Iolanda Filella
中科院分区:
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文献类型:
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作者:
Martín F. Garbulsky;J. Peñuelas;J. Ourcival;Iolanda Filella

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estimates of primary productivity independent of climate data so far used to estimate the RUE. This study showed that the Mediterranean forests present very mild seasonal changes in their vegetation indices, indicators of green biomass and, by contrast, large seasonal changes in absorbed CO 2 . The Photochemical Reflectance Index (PRI), calculated from the surface reflectance obtained by the MODIS sensor, presented a high correlation with the seasonal variability of the RUE estimated at ecosystem scale with eddy covariance techniques at two Mediterranean forests, along five years. These results showed that it is possible to estimate the temporal variability of RUE using the PRI and to improve the estimates of carbon absorption. This conceptual and technological improvement avoids the need to make assumptions about changes in the EUR and its relation to climate controls.