Regional estimation of LAI based on absorption and dispersion processes of electromagnetic wave in the vegetation canopy using satellite data
2009
Shin, Y.(Kagoshima Univ. (Japan)) | Seguchi, M. | Koriyama, M.
The aim of this study was to establish the method for estimating leaf area index (LAI) using satellite data. LAI is one of the most important land area ecosystem parameters which characterize the quantity distribution of the vegetation and even water balance of the watershed. In this study, we estimated LAI based on absorption and dispersion processes of electromagnetic waves in the vegetation canopy. The validation of LAI estimation using Terra-ASTER data was tested by comparing that of result to measured LAT using plant canopy analyzer. As a result, validity of LAI estimation method was confirmed as exhibited by a high correlation(r = 0.91) with 1:1 ratio of regression line between calculated and measurement of LAIs. In addition we compared spatial average of LAI estimated from ASTER data with a MOD15A2 LAI product and proved the precision of mutual LAI.
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