Estimating  the seasonal  maximum light use efficiency

Kanako Muramatsu; Shinobu Furumi; Noriko Soyama; Motomasa Daigo

doi:10.1117/12.2069142

8 November 2014 Estimating the seasonal maximum light use efficiency

Kanako Muramatsu, Shinobu Furumi, Noriko Soyama, Motomasa Daigo

Proceedings Volume 9260, Land Surface Remote Sensing II; 92603R (2014) https://doi.org/10.1117/12.2069142
Event: SPIE Asia-Pacific Remote Sensing, 2014, Beijing, China

Abstract

Light use efficiency (LUE) is a key parameter in estimating gross primary production (GPP) based on global Earth-observation satellite data and model calculations. In current LUE-based GPP estimation models, the maximum LUE is treated as a constant for each biome type. However, the maximum LUE varies seasonally. In this study, seasonal maximum LUE values were estimated from the maximum incident LUE versus the incident photosynthetically active radiation (PAR) and the fraction of absorbed PAR. First, an algorithm to estimate maximum incident LUE was developed to estimate GPP capacity using a light response curve. One of the parameters required for the light response curve was estimated from the linear relationship of the chlorophyll index and the GPP capacity at a high PAR level of 2000 (µmolm^-2s^-1), and was referred to as“ the maximum GPP capacity at 2000". The relationship was determined for six plant functional types: needleleaf deciduous trees, broadleaf deciduous trees, needleleaf evergreen trees, broadleaf evergreen trees, C3 grass, and crops. The maximum LUE values estimated in this study displayed seasonal variation, especially those for deciduous broadleaf forest, but also those for evergreen needleleaf forest.

Citation Download Citation

Kanako Muramatsu, Shinobu Furumi, Noriko Soyama, and Motomasa Daigo "Estimating the seasonal maximum light use efficiency", Proc. SPIE 9260, Land Surface Remote Sensing II, 92603R (8 November 2014); https://doi.org/10.1117/12.2069142

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