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Remote Sens. 2015, 7(5), 6026-6040; doi:10.3390/rs70506026

MODIS EVI and LST Temporal Response for Discrimination of Tropical Land Covers

1
Faculty of Forest, The National University of Laos, Vientiane Capital 0100, Lao PDR
2
School of Biological Sciences, The University of Adelaide, Adelaide, SA 5005, Australia
These authors contributed equally to this work.
*
Author to whom correspondence should be addressed.
Academic Editors: Clement Atzberger and Prasad S. Thenkabail
Received: 5 March 2015 / Revised: 2 May 2015 / Accepted: 7 May 2015 / Published: 13 May 2015
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Abstract

MODIS enhanced vegetation index (EVI) and land surface temperature (LST) are key indicators for monitoring vegetation cover changes in broad ecosystems. However, there has been little evaluation of these indices for detecting changes in a range of land covers in tropical regions. In this study, we investigated the characteristics and seasonal responses of LST and EVI for four different land covers in Lao tropical forests: native forest, rubber plantation, mixed wooded/cleared areas and agriculture. We calculated long-term averages of MODIS LST and EVI 16-day time series and compared their monthly transitions over the seven-year period from 2006 to 2012. We also tested whether these indices can be used to classify these four land covers. The findings demonstrate the complex interrelationship of LST and EVI and their monthly transitions for different land covers: they each showed distinctly different intra-annual LST and EVI variations. Native forests have the highest EVI, and the lowest LST throughout the year. In contrast, agricultural areas with little or no vegetation cover have the highest LST. The transition of LST/EVI for the land covers other than native forests showed marked seasonality. Linear discriminant analysis (LDA) showed that there was high overall accuracy of separation of land covers by these indices (86%). The encouraging results indicate that the combined use of MODIS LST and EVI holds promise for improving monitoring of changes in a Lao tropical forest. View Full-Text
Keywords: vegetation characteristics; temporal response; monthly transition; hysteresis; linear discrimination analysis (LDA); MODIS LST; EVI vegetation characteristics; temporal response; monthly transition; hysteresis; linear discrimination analysis (LDA); MODIS LST; EVI
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Phompila, C.; Lewis, M.; Ostendorf, B.; Clarke, K. MODIS EVI and LST Temporal Response for Discrimination of Tropical Land Covers. Remote Sens. 2015, 7, 6026-6040.

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