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

fYear

2012

fDate

22-27 July 2012

Firstpage

5959

Lastpage

5962

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);

fLanguage

English

Publisher

ieee

Conference_Titel

Geoscience and Remote Sensing Symposium (IGARSS), 2012 IEEE International

Conference_Location

Munich

ISSN

2153-6996

Print_ISBN

978-1-4673-1160-1

Electronic_ISBN

2153-6996

Type

conf

DOI

10.1109/IGARSS.2012.6352251

Filename

6352251