NDLI: Global clumping index map derived from modis BRDF products

Content Provider	IEEE Xplore Digital Library
Author	He, L. Chen, J.M. Pisek, J. Schaaf, C. Strahler, A.H.
Copyright Year	2011
Description	Author affiliation: Center for Remote Sensing, Boston University, 725 Commonwealth Avenue, MA 02215, USA (Schaaf, C.; Strahler, A.H.) \|\| Department of Geography and Program in Planning, University of Toronto, 100 St. George St., Room 5047, ON M5S 3G3, Canada (He, L.; Chen, J.M.) \|\| Tartu Observatory, Tõravere, 61602 Estonia (Pisek, J.)
Abstract	In this study, we show for the first time a global Clumping Index (CI) map at 500 m resolution derived using the Bidirectional Reflectance Distribution Function (BRDF) product from Moderate Resolution Imaging Spectroradiometer (MODIS). We found that the hotspot calculated from the MODIS BRDF product is underestimated in comparison with POLarization and Directionality of the Earth's Reflectances (POLDER) measurements very near the hotspot, so the MODIS-derived CI could be overestimated without correcting the bias. We developed an approach to correct the MODIS hotspot magnitude against synchronous co-registered POLDER-3 data. Field measured CIs by the Tracing Radiation and Architecture of Canopies instrument from 38 sites were used to evaluate the global CI map. Validation indicates that a strong correlation between MODIS-derived NDHD and CI indeed exists, and red band is better than near infrared band in effectively capturing the structural differences among cover types.
Starting Page	1255
Ending Page	1258
File Size	256323
Page Count	4
File Format	PDF
ISBN	9781457710032
ISSN	21537003
e-ISBN	9781457710056
DOI	10.1109/IGARSS.2011.6049427
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-07-24
Publisher Place	Canada
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	MODIS Indexes Kernel Reflectivity Remote sensing Data models NDHD Clumping index hotspot BRDF
Content Type	Text
Resource Type	Article

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