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Permanent link (DOI): https://doi.org/10.7939/R3ZS74

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Evaluation of MODIS-LAI products in the tropical dry secondary forest of Mata Seca, Minas Gerais, Brazil Open Access

Descriptions

Other title
Subject/Keyword
MODIS
Tropical Secondary Forest Succession
Leaf Area Index
Hemispherical Photography
Woody Area Index
Validation
LAI-2000
Phenology
Type of item
Thesis
Degree grantor
University of Alberta
Author or creator
Yamarte, Payri A
Supervisor and department
Sánchez-Azofeifa, Arturo (Earth and Atmospheric Sciences)
Examining committee member and department
MacGregor, Mike (Computing Science)
Sánchez-Azofeifa, Arturo (Earth and Atmospheric Sciences)
Rivard, Benoit (Earth and Atmospheric Sciences)
Department
Department of Earth and Atmospheric Sciences
Specialization

Date accepted
2013-01-23T14:12:33Z
Graduation date
2013-06
Degree
Master of Science
Degree level
Master's
Abstract
Leaf Area Index (LAI) advances scientific knowledge of the role of secondary forests in forest area conservation. MODIS-LAI products provide an alternative, efficient and cost-effective method for measuring LAI in Tropical Dry Forests (TDFs). The performance of MODIS-LAI satellite products in a TDF was studied as a function of successional stages by (1) estimating seasonal LAI variations compared to in situ LAI values (2) using dry season MODIS-LAI products to estimate Woody Area Index (WAI) (3) estimating phenology changes through comparisons to in situ data. The study demonstrates (1) MODIS-LAI product showed agreement with in situ values with increasing successional stage. (2) MODIS-LAI product showed best agreement to in situ WAI values in the intermediate successional stage. (3) TIMESAT analysis indicated that MODIS-LAI products detected start-of-season 1-2 weeks before in situ values and end-of-season 20-30 days after in situ values, indicating that MODIS-LAI product captures canopy leafing, but is not suitable for detecting senescence
Language
English
DOI
doi:10.7939/R3ZS74
Rights
Permission is hereby granted to the University of Alberta Libraries to reproduce single copies of this thesis and to lend or sell such copies for private, scholarly or scientific research purposes only. Where the thesis is converted to, or otherwise made available in digital form, the University of Alberta will advise potential users of the thesis of these terms. The author reserves all other publication and other rights in association with the copyright in the thesis and, except as herein before provided, neither the thesis nor any substantial portion thereof may be printed or otherwise reproduced in any material form whatsoever without the author's prior written permission.
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