Title :
Intercomparison and uncertainty analysis of global MODIS, cyclopes, and GLOBCARBON LAI products
Author :
Fang, Hongliang ; Wei, Shanshan ; Jiang, Chongya
Author_Institution :
LREIS, Inst. of Geographic Sci. & Natural Resources Res., Beijing, China
Abstract :
Three major global moderate resolution leaf area index (LAI) products: MODIS/TERRA+AQUA (MCD15 C5), SPOT/VEGETATION CYCLOPES V3.1, and the GLOBCARBON V2.0, were compared in this study. Results show that the three products agree very well for grasses/cereal crops and shrubs. The products differ considerably for EBF, where GLOBCARBON shows systematically lower LAIs than MODIS (~1.02) and CYCLOEPS (~0.50). The discrepancies for EBF are attributed to the different LAI definitions and clumping corrections. MODIS and CYCLOPES generally agree with each other for DBF, ENF and DNF during the peak growth period. The product theoretical uncertainties, indicated by the quantitative quality indicators (QQIs), show that MODIS has the lowest uncertainty (0.19) followed by CYCLOPES (0.54) and GLOBCARBON (0.65).
Keywords :
geophysical techniques; radiometry; vegetation; CYCLOPES LAI product; GLOBCARBON LAI product; MODIS-TERRA+AQUA LAI product; SPOT-VEGETATION LAI product; cereal crop; global MODIS uncertainty analysis; grasses crop; leaf area index; quantitative quality indicators; Agriculture; Communities; Indexes; MODIS; Remote sensing; Uncertainty; Vegetation mapping; CYCLOPES; GLOBCARBON; Leaf area index (LAI); MODIS; intercomparison; quantitative quality indicators (QQIs);
Conference_Titel :
Geoscience and Remote Sensing Symposium (IGARSS), 2012 IEEE International
Conference_Location :
Munich
Print_ISBN :
978-1-4673-1160-1
Electronic_ISBN :
2153-6996
DOI :
10.1109/IGARSS.2012.6352251
